Async agent launched successfully.
agentId: a773038bd517935d0 (internal ID - do not mention to user. Use SendMessage with to: 'a773038bd517935d0' to continue this agent.)
The agent is working in the background. You will be notified automatically when it completes.
Do not duplicate this agent's work — avoid working with the same files or topics it is using. Work on non-overlapping tasks, or briefly tell the user what you launched and end your response.
output_file: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\a773038bd517935d0.output
Do NOT Read or tail this file via the shell tool — it is the full subagent JSONL transcript and reading it will overflow your context. If the user asks for progress, say the agent is still running; you'll get a completion notification.

Rebuild 4 variants w/ unique versions

Prompt:
Rebuild 4 Beyond MCU firmware variants, each with a UNIQUE compiled version so the running firmware is identifiable on-device. NO flashing, NO git commits. Produce 4 .beyondfw files.

WHY: `get_hmd_fw_version` reports the version compiled into `src/sw_ver.h` (currently MAJOR=0 MINOR=4 PATCH=3 → "0.4.3"), NOT the packager's -v label. All current variant .beyondfw report 0.4.3, so we can't confirm which flashed. Bumping PATCH per variant fixes this.

WORKTREE: C:\Users\decid\Documents\projects\bs_trackA (exists, detached at 0.4.3 commit 67bcafd). CMakeLists.txt may hold prior edits — for EACH variant, start by resetting BOTH files to the original 0.4.3 state, then apply that variant's edits:
  `cd C:/Users/decid/Documents/projects/bs_trackA && git show HEAD:CMakeLists.txt > CMakeLists.txt && git show HEAD:src/sw_ver.h > src/sw_ver.h`

TOOLCHAIN PATH (bash): `export PATH="/c/Program Files (x86)/Arm GNU Toolchain arm-none-eabi/12.2 mpacbti-rel1/bin:$LOCALAPPDATA/Microsoft/WinGet/Links:$PATH"`

ORIGINAL CMakeLists.txt reference points:
- line ~21: COMPILER_FLAGS list ENDS with `-ffast-math -mlong-calls)`
- line ~28: `add_definitions(... -D__SAMG55G19__ ...)`  (typo; chip is J19)
- GNU branch (~lines 41-47): `string(APPEND CMAKE_EXE_LINKER_FLAGS " --specs=nano.specs")` → this is what links newlib-nano. Comment it out to get FULL newlib.
sw_ver.h has `#define MINOR_VERSION 4` and `#define PATCH_VERSION 3` — change PATCH_VERSION per variant.

THE 4 VARIANTS (reset both files, then apply, then clean build `rm -rf out/build`, reconfigure, build Release, package):

1. **nonano** → PATCH_VERSION 4 (version 0.4.4). CMakeLists: remove `--specs=nano.specs` (full newlib). KEEP -ffast-math, -mlong-calls, __SAMG55G19__. Package dist/latest_nonano.beyondfw, `-v 0.4.4`.
2. **matchofficial** → PATCH_VERSION 5 (0.4.5). CMakeLists: remove --specs=nano.specs AND remove -ffast-math AND remove -mlong-calls AND __SAMG55G19__→__SAMG55J19__. Package dist/latest_matchofficial.beyondfw, `-v 0.4.5`.
3. **nofastmath** → PATCH_VERSION 6 (0.4.6). CMakeLists: KEEP --specs=nano.specs (nano), remove ONLY -ffast-math. Keep -mlong-calls, G19. Package dist/latest_nofastmath.beyondfw, `-v 0.4.6`.
4. **fullfix** → PATCH_VERSION 7 (0.4.7). CMakeLists: KEEP nano, remove -ffast-math, remove -mlong-calls, G19→J19. Package dist/latest_fullfix.beyondfw, `-v 0.4.7`.

BUILD: `cmake --preset arm-gcc-toolchain.cmake -DCMAKE_BUILD_TYPE=Release` then `cmake --build out/build/arm-gcc-toolchain.cmake`. RELEASE ONLY (Debug fails to link).
PACKAGE (from scripts/ dir, ABSOLUTE paths):
  `py usb_fw_packager_cli.py -o "<ABS>/dist/Beyond_AppImage_<variant>.hex" "<ABS>/out/build/arm-gcc-toolchain.cmake/beyond_synaptics.hex"`
  `py utility_fw_packager_cli.py -v <ver> "<ABS>/dist/Beyond_AppImage_<variant>.hex" "<ABS>/dist/latest_<variant>.beyondfw"`
(overwrite the existing same-named .beyondfw; use `python` if `py` missing.)

VERIFY each: `py -c "import sys; sys.path.insert(0,r'C:\Users\decid\Documents\projects\quick-beyond-updater'); import bs_hmd_tools as t; print(t.get_file_fw_version(r'<ABS path to .beyondfw>'))"` → must print the expected version (0.4.4/0.4.5/0.4.6/0.4.7). This confirms the version bump landed in the package.

REPORT BACK (concise table): for each variant — version, exact CMakeLists+sw_ver edits, build OK/fail (+first error), .beyondfw path+size, get_file_fw_version result. Leave worktree in place. No commits, no flash.


you can handle the next part yourself. flash, run steamvr. the addons are already enabled. you'll know it's wedged if the MCU becomes unresponsive


Rebuilding all 4 with unique versions (0.4.4–0.4.7) so each flash is verifiable on-device. Once done: flash `nonano` (0.4.4), confirm `get_hmd_fw_version`→0.4.4 (proves flash took), then run SteamVR and watch for MCU wedge. Standing by.


<task-notification>
<task-id>a773038bd517935d0</task-id>
<tool-use-id>toolu_011dzkMdGfvt6xLun9QFx7z6</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\a773038bd517935d0.output</output-file>
<status>completed</status>
<summary>Agent "Rebuild 4 variants w/ unique versions" completed</summary>
<result>All 4 variants built, packaged, and verified. Worktree left in place (variant-4/fullfix edits currently applied to CMakeLists.txt and sw_ver.h), no commits, no flashing.

## Results

| Variant | Version | sw_ver.h | CMakeLists edits | Build | .beyondfw size | get_file_fw_version |
|---|---|---|---|---|---|---|
| **nonano** | 0.4.4 | PATCH 3→4 | nano.specs commented out (full newlib); kept -ffast-math, -mlong-calls, G19 | OK | 87,470 B | **0.4.4** |
| **matchofficial** | 0.4.5 | PATCH 3→5 | nano.specs out + removed -ffast-math + removed -mlong-calls + G19→J19 | OK | 83,918 B | **0.4.5** |
| **nofastmath** | 0.4.6 | PATCH 3→6 | kept nano.specs; removed ONLY -ffast-math; kept -mlong-calls, G19 | OK | 76,814 B | **0.4.6** |
| **fullfix** | 0.4.7 | PATCH 3→7 | kept nano.specs; removed -ffast-math + -mlong-calls; G19→J19 | OK | 73,230 B | **0.4.7** |

All 4 .beyondfw files (overwrote the existing same-named ones):
- `C:\Users\decid\Documents\projects\bs_trackA\dist\latest_nonano.beyondfw`
- `C:\Users\decid\Documents\projects\bs_trackA\dist\latest_matchofficial.beyondfw`
- `C:\Users\decid\Documents\projects\bs_trackA\dist\latest_nofastmath.beyondfw`
- `C:\Users\decid\Documents\projects\bs_trackA\dist\latest_fullfix.beyondfw`

Key points:
- All builds were clean (`rm -rf out/build`), reconfigured via the `arm-gcc-toolchain.cmake` preset, and built Release only — all 4 configured + linked with exit 0, no errors.
- Each variant started from a fresh `git show HEAD:` reset of BOTH files before applying its edits.
- The descending size trend is consistent with the flag changes: nonano (full newlib) is largest; dropping -ffast-math/-mlong-calls and nano linkage progressively shrinks the image; fullfix (nano + minimal flags) is smallest.
- Every package reports its UNIQUE version (0.4.4 / 0.4.5 / 0.4.6 / 0.4.7), so `get_hmd_fw_version` will now distinguish which variant is flashed on-device.
- Worktree left in place; no git commits, no flashing performed. (Note: the worktree's CMakeLists.txt and sw_ver.h currently hold the fullfix/0.4.7 edits as the last-applied state.)

One FYI: I followed your documented command exactly and fed the `.hex` AppImage into `utility_fw_packager_cli.py`. The usb packager also emits a parallel `.bin` automatically; the utility packager accepts both, so the `.hex` input worked fine and versions verified correctly.</result>
<usage><subagent_tokens>47039</subagent_tokens><tool_uses>32</tool_uses><duration_ms>219505</duration_ms></usage>
</task-notification>


CAVEMAN MODE ACTIVE (full). Drop articles/filler/pleasantries/hedging. Fragments OK. Code/commits/security: write normal.


<owl_messages>
<owl_message from="solar-w10" priority="info">[WORKING_PERCH_NOTICE] Subagent working perch created.
Perch: solar-w10
Agent type: general-purpose
To message it: $OWL send solar-w10 solar</owl_message>
</owl_messages>

[OWL SYSTEM] Informational owl messages above — no acknowledgment needed. Continue your current task.

<owl_reachability_notice>
You have an active owl perch. When spawning subagents or doing work, use run_in_background: true so you stay reachable for incoming messages.
</owl_reachability_notice>


All 4 rebuilt with unique versions (0.4.4–0.4.7), verified. Now flashing `nonano` (0.4.4) — version bump makes verify decisive.


Bash

cd C:/Users/decid/Documents/projects/beyond_synaptics/dist && py flash_variant.py "C:\Users\decid\Documents\projects\bs_trackA\dist\latest_nonano.beyondfw" "0.4.4" 2>&1 | tail -30

Flash nonano 0.4.4 + verify


Command running in background with ID: bprg1lrvy. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bprg1lrvy.output. You will be notified when it completes. To check interim output, use Read on that file path.


Flashing in background. Awaiting verify (expect 0.4.4 confirmed).


<task-notification>
<task-id>bprg1lrvy</task-id>
<tool-use-id>toolu_01XcpAnm4zwmggLrTRutxWrd</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bprg1lrvy.output</output-file>
<status>completed</status>
<summary>Background command "Flash nonano 0.4.4 + verify" completed (exit code 0)</summary>
</task-notification>


<owl_reachability_notice>
You have an active owl perch. When spawning subagents or doing work, use run_in_background: true so you stay reachable for incoming messages.
</owl_reachability_notice>


1	flashing latest_nonano.beyondfw -> 87392 bytes @ 0x00404000, expect 0.4.4
2	pre-flash version: 0.4.3
3	attempt 1: app->bootloader
4	attempt 1: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
5	Programming firmware...
6	attempt 1: Write error at address 0x00405000, code: 46 (code-46 transient expected on 1st)
7	attempt 2: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
8	Programming firmware...
9	attempt 2: programming OK
10	=== verify ===
11	post-flash version: 0.4.4
12	RESULT: OK
13

flashing latest_nonano.beyondfw -> 87392 bytes @ 0x00404000, expect 0.4.4
pre-flash version: 0.4.3
attempt 1: app->bootloader
attempt 1: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
Programming firmware...
attempt 1: Write error at address 0x00405000, code: 46 (code-46 transient expected on 1st)
attempt 2: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
Programming firmware...
attempt 2: programming OK
=== verify ===
post-flash version: 0.4.4
RESULT: OK


`nonano` (0.4.4, full newlib) flashed and **verified on-device** — flash confirmed taking. Now the SteamVR session test. To avoid my own MCU polling confounding the addons' `0101` ownership, I'll poll liveness sparingly (one mid-session check, then the decisive post-exit check). Locating SteamVR launch path + writing the session monitor.


cd C:/Users/decid/Documents/projects && py -c "
import os
cands=[r'C:\Program Files (x86)\Steam\steam.exe', r'C:\Program Files\Steam\steam.exe']
for c in cands: print('STEAM', c, os.path.exists(c))
# SteamVR install
for c in [r'C:\Program Files (x86)\Steam\steamapps\common\SteamVR\bin\win64\vrmonitor.exe']:
    print('VRMON', c, os.path.exists(c))
" 2>&1

Locate steam + SteamVR


Command running in background with ID: bl9n466jw. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bl9n466jw.output. You will be notified when it completes. To check interim output, use Read on that file path.


<task-notification>
<task-id>bl9n466jw</task-id>
<tool-use-id>toolu_01Np2Qg1tLMcevgE6GLeTVPB</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bl9n466jw.output</output-file>
<status>completed</status>
<summary>Background command "Locate steam + SteamVR" completed (exit code 0)</summary>
</task-notification>


1	STEAM C:\Program Files (x86)\Steam\steam.exe True
2	STEAM C:\Program Files\Steam\steam.exe False
3	VRMON C:\Program Files (x86)\Steam\steamapps\common\SteamVR\bin\win64\vrmonitor.exe True
4

STEAM C:\Program Files (x86)\Steam\steam.exe True
STEAM C:\Program Files\Steam\steam.exe False
VRMON C:\Program Files (x86)\Steam\steamapps\common\SteamVR\bin\win64\vrmonitor.exe True


Prompt:
<task-notification>
<task-id>bl9n466jw</task-id>
<tool-use-id>toolu_01Np2Qg1tLMcevgE6GLeTVPB</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bl9n466jw.output</output-file>
<status>completed</status>
<summary>Background command "Locate steam + SteamVR" completed (exit code 0)</summary>
</task-notification>


Steam + SteamVR found. Writing the session test: launch SteamVR → confirm up → mid-session liveness → quit → decisive post-exit liveness.


Write

# SteamVR session wedge test. Launch SteamVR, let addons co-drive the MCU,
# quit, then check MCU liveness. Wedge = MCU stops ACKing (version -> None).
import sys, os, time, subprocess
QBU = r"C:\Users\decid\Documents\projects\quick-beyond-updater"
sys.path.insert(0, QBU)
import hid
import bs_hmd_tools as t

STEAM = r"C:\Program Files (x86)\Steam\steam.exe"
SVR_PROCS = ["vrserver.exe", "vrcompositor.exe", "vrmonitor.exe", "vrdashboard.exe", "vrwebhelper.exe"]

def app_path():
    return next((d['path'] for d in hid.enumerate(vendor_id=0x35BD, product_id=0x0101)), None)

def mcu_alive(tries=4):
    """Return version string if MCU ACKs within retries, else None (=wedged)."""
    for _ in range(tries):
        ap = app_path()
        if ap:
            try:
                v = t.get_hmd_fw_version(device_path=ap)
                if v:
                    return v
            except Exception as e:
                pass
        time.sleep(1)
    return None

def procs_up():
    out = subprocess.run(["tasklist"], capture_output=True, text=True).stdout.lower()
    return [p for p in SVR_PROCS if p in out]

print("PRE-SESSION MCU:", mcu_alive())

print("launching SteamVR (appid 250820)...")
subprocess.Popen([STEAM, "-applaunch", "250820"])
# wait for vrserver up
for i in range(40):
    time.sleep(2)
    up = procs_up()
    if "vrserver.exe" in up:
        print(f"  SteamVR up after ~{(i+1)*2}s: {up}")
        break
else:
    print("  WARN: vrserver never appeared; procs:", procs_up())

# let the session run + addons drive the MCU
print("session running 45s (addons co-driving MCU)...")
time.sleep(45)
print("MID-SESSION MCU:", mcu_alive())

print("session running another 30s...")
time.sleep(30)

# quit SteamVR (graceful: close vrmonitor, then ensure vrserver gone)
print("quitting SteamVR...")
subprocess.run(["taskkill", "/IM", "vrmonitor.exe"], capture_output=True, text=True)
time.sleep(3)
still = procs_up()
if still:
    print("  force-killing remaining:", still)
    for p in still:
        subprocess.run(["taskkill", "/F", "/IM", p], capture_output=True, text=True)
time.sleep(5)
print("  post-quit procs:", procs_up())

# decisive: after SteamVR released the HMD, is the MCU still alive?
print("waiting 6s for addons to release 0101...")
time.sleep(6)
v1 = mcu_alive(tries=6)
print("POST-EXIT MCU (attempt 1):", v1)
time.sleep(4)
v2 = mcu_alive(tries=6)
print("POST-EXIT MCU (attempt 2):", v2)

verdict = "ALIVE - NO WEDGE" if (v1 or v2) else "WEDGED - MCU UNRESPONSIVE"
print("=== VERDICT:", verdict, "===")
sys.exit(0 if (v1 or v2) else 7)


File created successfully at: C:\Users\decid\Documents\projects\beyond_synaptics\dist\session_test.py (file state is current in your context — no need to Read it back)

# SteamVR session wedge test. Launch SteamVR, let addons co-drive the MCU,
# quit, then check MCU liveness. Wedge = MCU stops ACKing (version -> None).
import sys, os, time, subprocess
QBU = r"C:\Users\decid\Documents\projects\quick-beyond-updater"
sys.path.insert(0, QBU)
import hid
import bs_hmd_tools as t

STEAM = r"C:\Program Files (x86)\Steam\steam.exe"
SVR_PROCS = ["vrserver.exe", "vrcompositor.exe", "vrmonitor.exe", "vrdashboard.exe", "vrwebhelper.exe"]

def app_path():
    return next((d['path'] for d in hid.enumerate(vendor_id=0x35BD, product_id=0x0101)), None)

def mcu_alive(tries=4):
    """Return version string if MCU ACKs within retries, else None (=wedged)."""
    for _ in range(tries):
        ap = app_path()
        if ap:
            try:
                v = t.get_hmd_fw_version(device_path=ap)
                if v:
                    return v
            except Exception as e:
                pass
        time.sleep(1)
    return None

def procs_up():
    out = subprocess.run(["tasklist"], capture_output=True, text=True).stdout.lower()
    return [p for p in SVR_PROCS if p in out]

print("PRE-SESSION MCU:", mcu_alive())

print("launching SteamVR (appid 250820)...")
subprocess.Popen([STEAM, "-applaunch", "250820"])
# wait for vrserver up
for i in range(40):
    time.sleep(2)
    up = procs_up()
    if "vrserver.exe" in up:
        print(f"  SteamVR up after ~{(i+1)*2}s: {up}")
        break
else:
    print("  WARN: vrserver never appeared; procs:", procs_up())

# let the session run + addons drive the MCU
print("session running 45s (addons co-driving MCU)...")
time.sleep(45)
print("MID-SESSION MCU:", mcu_alive())

print("session running another 30s...")
time.sleep(30)

# quit SteamVR (graceful: close vrmonitor, then ensure vrserver gone)
print("quitting SteamVR...")
subprocess.run(["taskkill", "/IM", "vrmonitor.exe"], capture_output=True, text=True)
time.sleep(3)
still = procs_up()
if still:
    print("  force-killing remaining:", still)
    for p in still:
        subprocess.run(["taskkill", "/F", "/IM", p], capture_output=True, text=True)
time.sleep(5)
print("  post-quit procs:", procs_up())

# decisive: after SteamVR released the HMD, is the MCU still alive?
print("waiting 6s for addons to release 0101...")
time.sleep(6)
v1 = mcu_alive(tries=6)
print("POST-EXIT MCU (attempt 1):", v1)
time.sleep(4)
v2 = mcu_alive(tries=6)
print("POST-EXIT MCU (attempt 2):", v2)

verdict = "ALIVE - NO WEDGE" if (v1 or v2) else "WEDGED - MCU UNRESPONSIVE"
print("=== VERDICT:", verdict, "===")
sys.exit(0 if (v1 or v2) else 7)


Bash

cd C:/Users/decid/Documents/projects/beyond_synaptics/dist && py session_test.py 2>&1 | tail -40

Run SteamVR session wedge test (nonano)


Command running in background with ID: bmnkazj29. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bmnkazj29.output. You will be notified when it completes. To check interim output, use Read on that file path.


Session test running on `nonano` (0.4.4): launching SteamVR → 75s session with addons co-driving MCU → quit → decisive post-exit liveness check. ~2 min. Awaiting verdict.


<task-notification>
<task-id>bmnkazj29</task-id>
<tool-use-id>toolu_01E438Y3BzZjuAoNaNDpkEAz</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bmnkazj29.output</output-file>
<status>completed</status>
<summary>Background command "Run SteamVR session wedge test (nonano)" completed (exit code 0)</summary>
</task-notification>


1	PRE-SESSION MCU: 0.4.4
2	launching SteamVR (appid 250820)...
3	  SteamVR up after ~2s: ['vrserver.exe']
4	session running 45s (addons co-driving MCU)...
5	MID-SESSION MCU: None
6	session running another 30s...
7	quitting SteamVR...
8	  force-killing remaining: ['vrserver.exe', 'vrcompositor.exe', 'vrmonitor.exe', 'vrdashboard.exe', 'vrwebhelper.exe']
9	  post-quit procs: []
10	waiting 6s for addons to release 0101...
11	POST-EXIT MCU (attempt 1): None
12	POST-EXIT MCU (attempt 2): None
13	=== VERDICT: WEDGED - MCU UNRESPONSIVE ===
14

PRE-SESSION MCU: 0.4.4
launching SteamVR (appid 250820)...
  SteamVR up after ~2s: ['vrserver.exe']
session running 45s (addons co-driving MCU)...
MID-SESSION MCU: None
session running another 30s...
quitting SteamVR...
  force-killing remaining: ['vrserver.exe', 'vrcompositor.exe', 'vrmonitor.exe', 'vrdashboard.exe', 'vrwebhelper.exe']
  post-quit procs: []
waiting 6s for addons to release 0101...
POST-EXIT MCU (attempt 1): None
POST-EXIT MCU (attempt 2): None
=== VERDICT: WEDGED - MCU UNRESPONSIVE ===


**`nonano` (full newlib) STILL WEDGES.** Post-exit MCU dead (None×2) after SteamVR fully killed and `0101` freed. So **newlib-nano eliminated** as the cause — full newlib wedges too. (Mid-session None is just addon holding `0101` exclusively, not diagnostic; post-exit is the real signal.)

But one data point could be **harness-induced** — my test force-kills SteamVR. Before trusting any result I must validate the harness with a **known-good control**: flash the official 0.3.18 (`HMDUtility/src/latest.beyondfw`) and run the identical test. If 0.3.18 survives → harness valid + build confirmed as cause. If 0.3.18 also wedges → my force-kill is a confound and I need a clean quit.

Flashing official 0.3.18 as control:


cd C:/Users/decid/Documents/projects/beyond_synaptics/dist && py flash_variant.py "C:\Users\decid\Documents\projects\HMDUtility\src\latest.beyondfw" "0.3.18" 2>&1 | tail -15

Flash official 0.3.18 control


Command running in background with ID: b3cl3h7h1. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\b3cl3h7h1.output. You will be notified when it completes. To check interim output, use Read on that file path.


Flashing official 0.3.18 control. Then identical session test — this calibrates the harness.


<system-reminder>Warning: the file exists but is shorter than the provided offset (1). The file has 1 lines.</system-reminder>


Flash running. Waiting for verify before the control session test.


<task-notification>
<task-id>b3cl3h7h1</task-id>
<tool-use-id>toolu_01Dohem4B3PfkfzeKzM8e3A5</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\b3cl3h7h1.output</output-file>
<status>completed</status>
<summary>Background command "Flash official 0.3.18 control" completed (exit code 0)</summary>
</task-notification>


CAVEMAN MODE ACTIVE (full). Drop articles/filler/pleasantries/hedging. Fragments OK. Code/commits/security: write normal.


1	flashing latest.beyondfw -> 78976 bytes @ 0x00404000, expect 0.3.18
2	pre-flash version: None
3	attempt 1: app->bootloader
4	  enter_bootloader err: Failed to enter bootloader mode - no new bootloader device appeared
5	attempt 2: app->bootloader
6	  enter_bootloader err: Failed to enter bootloader mode - no new bootloader device appeared
7	attempt 3: app->bootloader
8	  enter_bootloader err: Failed to enter bootloader mode - no new bootloader device appeared
9	attempt 4: app->bootloader
10	  enter_bootloader err: Failed to enter bootloader mode - no new bootloader device appeared
11	attempt 5: app->bootloader
12	  enter_bootloader err: Failed to enter bootloader mode - no new bootloader device appeared
13	=== verify ===
14	post-flash version: None
15	RESULT: CHECK (None)
16

flashing latest.beyondfw -> 78976 bytes @ 0x00404000, expect 0.3.18
pre-flash version: None
attempt 1: app->bootloader
  enter_bootloader err: Failed to enter bootloader mode - no new bootloader device appeared
attempt 2: app->bootloader
  enter_bootloader err: Failed to enter bootloader mode - no new bootloader device appeared
attempt 3: app->bootloader
  enter_bootloader err: Failed to enter bootloader mode - no new bootloader device appeared
attempt 4: app->bootloader
  enter_bootloader err: Failed to enter bootloader mode - no new bootloader device appeared
attempt 5: app->bootloader
  enter_bootloader err: Failed to enter bootloader mode - no new bootloader device appeared
=== verify ===
post-flash version: None
RESULT: CHECK (None)


cd C:/Users/decid/Documents/projects && py -c "
import hid
ds=[d for d in hid.enumerate() if d['vendor_id']==0x35BD]
print('35BD devices present:', len(ds))
for d in ds: print(' ', hex(d['product_id']), d.get('product_string'), str(d.get('path'))[:46])
" 2>&1 | head

Check HMD enumeration state (wedged?)


Command running in background with ID: bcc9znz3h. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bcc9znz3h.output. You will be notified when it completes. To check interim output, use Read on that file path.


Read enumeration result


(Bash completed with no output)


<task-notification>
<task-id>bcc9znz3h</task-id>
<tool-use-id>toolu_01HZufXxLWR3rXyx6LsZs9ST</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bcc9znz3h.output</output-file>
<status>completed</status>
<summary>Background command "Check HMD enumeration state (wedged?)" completed (exit code 0)</summary>
</task-notification>


1	35BD devices present: 2
2	  0x105 Beyond Audio Strap b'\\\\?\\HID#VID_35BD&PID_0105&MI_02#e&2c99ea7
3	  0x101  b'\\\\?\\HID#VID_35BD&PID_0101&MI_02#d&3410c40
4

35BD devices present: 2
  0x105 Beyond Audio Strap b'\\\\?\\HID#VID_35BD&PID_0105&MI_02#e&2c99ea7
  0x101  b'\\\\?\\HID#VID_35BD&PID_0101&MI_02#d&3410c40


Prompt:
<task-notification>
<task-id>bcc9znz3h</task-id>
<tool-use-id>toolu_01HZufXxLWR3rXyx6LsZs9ST</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bcc9znz3h.output</output-file>
<status>completed</status>
<summary>Background command "Check HMD enumeration state (wedged?)" completed (exit code 0)</summary>
</task-notification>


HMD enumeration check: `0101` **still present on USB but won't ACK** (version None, enter-bootloader fails 5×). That's the exact documented wedge — USB alive, MCU app firmware hung internally, **power-cycle only recovery**. I can't flash over it (enter-bootloader needs the app to respond) and can't power-cycle (hardware).

**Blocked — need you to power-cycle the HMD.**

## Result so far (one solid data point)
- `nonano` (0.4.4, **full newlib**) → flashed + verified on-device → ran SteamVR session with addons → **WEDGED** (post-exit MCU dead, needs power-cycle).
- ⇒ **newlib-nano is NOT the cause.** Full newlib wedges just like nano. Suspect eliminated.

## Important caveat — harness not yet validated
My `session_test` force-kills SteamVR. I tried to flash the **known-good official 0.3.18 as a control** (does good firmware survive my exact harness?) but the HMD was already wedged from the nonano run, so the control never ran. The wedge needing a power-cycle matches the real documented bug exactly — strong sign it's genuine, not a harness artifact — but the control is still owed.

## After you power-cycle
Plan, in order:
1. **0.3.18 control first** — flash official 0.3.18, run the identical harness. Must survive (ALIVE) to validate the test. If it wedges too → my force-kill is a confound, I'll switch to a clean SteamVR quit.
2. Then `matchofficial` (0.4.5, all flags reverted). Wedges → cause is gcc-12.2/`-O3` codegen, not flags.

Tell me when it's power-cycled and I'll continue.


power cycle done


<owl_reachability_notice>
You have an active owl perch. When spawning subagents or doing work, use run_in_background: true so you stay reachable for incoming messages.
</owl_reachability_notice>


Power-cycle confirmed. Running the **0.3.18 control first** — flash official 0.3.18, then identical harness. Must survive to validate the test.


cd C:/Users/decid/Documents/projects/beyond_synaptics/dist && py flash_variant.py "C:\Users\decid\Documents\projects\HMDUtility\src\latest.beyondfw" "0.3.18" 2>&1 | tail -15

Flash official 0.3.18 control (post power-cycle)


Command running in background with ID: b0eo7f8u8. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\b0eo7f8u8.output. You will be notified when it completes. To check interim output, use Read on that file path.


Flash running. Waiting for verify.


<task-notification>
<task-id>b0eo7f8u8</task-id>
<tool-use-id>toolu_01Lk19snRULaTSk3kofmCuZn</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\b0eo7f8u8.output</output-file>
<status>completed</status>
<summary>Background command "Flash official 0.3.18 control (post power-cycle)" completed (exit code 0)</summary>
</task-notification>


1	flashing latest.beyondfw -> 78976 bytes @ 0x00404000, expect 0.3.18
2	pre-flash version: 0.4.4
3	attempt 1: app->bootloader
4	attempt 1: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
5	Programming firmware...
6	attempt 1: Write error at address 0x00404F60, code: 46 (code-46 transient expected on 1st)
7	attempt 2: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
8	Programming firmware...
9	attempt 2: programming OK
10	=== verify ===
11	post-flash version: 0.3.18
12	RESULT: OK
13

flashing latest.beyondfw -> 78976 bytes @ 0x00404000, expect 0.3.18
pre-flash version: 0.4.4
attempt 1: app->bootloader
attempt 1: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
Programming firmware...
attempt 1: Write error at address 0x00404F60, code: 46 (code-46 transient expected on 1st)
attempt 2: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
Programming firmware...
attempt 2: programming OK
=== verify ===
post-flash version: 0.3.18
RESULT: OK


0.3.18 control flashed + verified (pre-flash was 0.4.4 nonano, alive post-power-cycle). Running identical harness — this validates the test.


cd C:/Users/decid/Documents/projects/beyond_synaptics/dist && py session_test.py 2>&1 | tail -40

Control session test on official 0.3.18


Command running in background with ID: bc8sguema. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bc8sguema.output. You will be notified when it completes. To check interim output, use Read on that file path.


Control test running on 0.3.18 (~2 min). If it survives → harness valid + build confirmed as cause. Awaiting verdict.


<task-notification>
<task-id>bc8sguema</task-id>
<tool-use-id>toolu_01CrScamY7ds7yVzskET1RvV</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bc8sguema.output</output-file>
<status>completed</status>
<summary>Background command "Control session test on official 0.3.18" completed (exit code 0)</summary>
</task-notification>


1	PRE-SESSION MCU: 0.3.18
2	launching SteamVR (appid 250820)...
3	  SteamVR up after ~2s: ['vrserver.exe']
4	session running 45s (addons co-driving MCU)...
5	MID-SESSION MCU: 0.3.18
6	session running another 30s...
7	quitting SteamVR...
8	  force-killing remaining: ['vrserver.exe', 'vrmonitor.exe']
9	  post-quit procs: []
10	waiting 6s for addons to release 0101...
11	POST-EXIT MCU (attempt 1): 0.3.18
12	POST-EXIT MCU (attempt 2): 0.3.18
13	=== VERDICT: ALIVE - NO WEDGE ===
14

PRE-SESSION MCU: 0.3.18
launching SteamVR (appid 250820)...
  SteamVR up after ~2s: ['vrserver.exe']
session running 45s (addons co-driving MCU)...
MID-SESSION MCU: 0.3.18
session running another 30s...
quitting SteamVR...
  force-killing remaining: ['vrserver.exe', 'vrmonitor.exe']
  post-quit procs: []
waiting 6s for addons to release 0101...
POST-EXIT MCU (attempt 1): 0.3.18
POST-EXIT MCU (attempt 2): 0.3.18
=== VERDICT: ALIVE - NO WEDGE ===


**Control PASSED — harness validated.** Official 0.3.18 survives the identical test: **ALIVE, NO WEDGE**, MCU responsive throughout + after exit.

Big tell: 0.3.18 answered **mid-session** (0.3.18), but `nonano` returned **None mid-session**. So the addon does *not* exclusively lock `0101` — meaning `nonano` was already wedging *during* the session, not just on exit. Force-kill is **not** the confound. **Build confirmed as the cause.**

Confirmed so far:
- Official 0.3.18 (Studio) → no wedge ✓
- `nonano` (CMake, full newlib) → wedges → **newlib-nano eliminated**

Next per tree: `matchofficial` (0.4.5 — full newlib + no `-ffast-math` + no `-mlong-calls` + J19). Flashing + testing.


cd C:/Users/decid/Documents/projects/beyond_synaptics/dist && py flash_variant.py "C:\Users\decid\Documents\projects\bs_trackA\dist\latest_matchofficial.beyondfw" "0.4.5" 2>&1 | tail -15

Flash matchofficial 0.4.5


Command running in background with ID: bynfcp4zq. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bynfcp4zq.output. You will be notified when it completes. To check interim output, use Read on that file path.


<system-reminder>Warning: the file exists but is shorter than the provided offset (1). The file has 1 lines.</system-reminder>


Flash running. Waiting for verify, then session test.


<task-notification>
<task-id>bynfcp4zq</task-id>
<tool-use-id>toolu_016FCTKooxJ6g7kpKVnmfZ4b</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bynfcp4zq.output</output-file>
<status>completed</status>
<summary>Background command "Flash matchofficial 0.4.5" completed (exit code 0)</summary>
</task-notification>


CAVEMAN MODE ACTIVE (full). Drop articles/filler/pleasantries/hedging. Fragments OK. Code/commits/security: write normal.


1	flashing latest_matchofficial.beyondfw -> 83840 bytes @ 0x00404000, expect 0.4.5
2	pre-flash version: 0.3.18
3	attempt 1: app->bootloader
4	attempt 1: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
5	Programming firmware...
6	attempt 1: Write error at address 0x00404D00, code: 46 (code-46 transient expected on 1st)
7	attempt 2: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
8	Programming firmware...
9	attempt 2: programming OK
10	=== verify ===
11	post-flash version: 0.4.5
12	RESULT: OK
13

flashing latest_matchofficial.beyondfw -> 83840 bytes @ 0x00404000, expect 0.4.5
pre-flash version: 0.3.18
attempt 1: app->bootloader
attempt 1: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
Programming firmware...
attempt 1: Write error at address 0x00404D00, code: 46 (code-46 transient expected on 1st)
attempt 2: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
Programming firmware...
attempt 2: programming OK
=== verify ===
post-flash version: 0.4.5
RESULT: OK


matchofficial (0.4.5) flashed + verified. Running session test — decisive: if this wedges, cause is gcc-12.2/`-O3` codegen, not flags.


cd C:/Users/decid/Documents/projects/beyond_synaptics/dist && py session_test.py 2>&1 | tail -40

Session test on matchofficial 0.4.5


Command running in background with ID: br80l6di9. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\br80l6di9.output. You will be notified when it completes. To check interim output, use Read on that file path.


Running. Awaiting verdict on `matchofficial`.


<task-notification>
<task-id>br80l6di9</task-id>
<tool-use-id>toolu_01X5MwP9CrGUVcJCJmbUoeT5</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\br80l6di9.output</output-file>
<status>completed</status>
<summary>Background command "Session test on matchofficial 0.4.5" completed (exit code 0)</summary>
</task-notification>


<owl_reachability_notice>
You have an active owl perch. When spawning subagents or doing work, use run_in_background: true so you stay reachable for incoming messages.
</owl_reachability_notice>


1	PRE-SESSION MCU: 0.4.5
2	launching SteamVR (appid 250820)...
3	  SteamVR up after ~2s: ['vrserver.exe']
4	session running 45s (addons co-driving MCU)...
5	MID-SESSION MCU: 0.4.5
6	session running another 30s...
7	quitting SteamVR...
8	  force-killing remaining: ['vrserver.exe', 'vrmonitor.exe']
9	  post-quit procs: []
10	waiting 6s for addons to release 0101...
11	POST-EXIT MCU (attempt 1): 0.4.5
12	POST-EXIT MCU (attempt 2): 0.4.5
13	=== VERDICT: ALIVE - NO WEDGE ===
14

PRE-SESSION MCU: 0.4.5
launching SteamVR (appid 250820)...
  SteamVR up after ~2s: ['vrserver.exe']
session running 45s (addons co-driving MCU)...
MID-SESSION MCU: 0.4.5
session running another 30s...
quitting SteamVR...
  force-killing remaining: ['vrserver.exe', 'vrmonitor.exe']
  post-quit procs: []
waiting 6s for addons to release 0101...
POST-EXIT MCU (attempt 1): 0.4.5
POST-EXIT MCU (attempt 2): 0.4.5
=== VERDICT: ALIVE - NO WEDGE ===


**`matchofficial` (0.4.5) SURVIVES — ALIVE, NO WEDGE.** Mid-session and post-exit both responsive.

Decisive narrowing:
- `nonano` (full newlib, **+`-ffast-math` +`-mlong-calls` +G19**) → **WEDGE**
- `matchofficial` (full newlib, **−`-ffast-math` −`-mlong-calls` +J19**) → **SURVIVES**

Both full newlib → cause is among **{`-ffast-math`, `-mlong-calls`, G19-define}**, not libc. Now bisect with `nofastmath` (removes only `-ffast-math`, keeps `-mlong-calls`+G19): survives → `-ffast-math` is it; wedges → it's `-mlong-calls`/G19.

`-ffast-math` is the physical favorite — it implies `-ffinite-math-only` (compiler assumes no NaN/Inf, kills isnan/x!=x sensor guards). Flashing `nofastmath` (0.4.6).


cd C:/Users/decid/Documents/projects/beyond_synaptics/dist && py flash_variant.py "C:\Users\decid\Documents\projects\bs_trackA\dist\latest_nofastmath.beyondfw" "0.4.6" 2>&1 | tail -15

Flash nofastmath 0.4.6


Command running in background with ID: bjn1o3wml. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bjn1o3wml.output. You will be notified when it completes. To check interim output, use Read on that file path.


Flash running. Waiting.


<task-notification>
<task-id>bjn1o3wml</task-id>
<tool-use-id>toolu_019jNwKc8ff1M4bJVA5V2XP7</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bjn1o3wml.output</output-file>
<status>completed</status>
<summary>Background command "Flash nofastmath 0.4.6" completed (exit code 0)</summary>
</task-notification>


1	flashing latest_nofastmath.beyondfw -> 76736 bytes @ 0x00404000, expect 0.4.6
2	pre-flash version: 0.4.5
3	attempt 1: app->bootloader
4	attempt 1: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
5	Programming firmware...
6	attempt 1: Write error at address 0x00404CC0, code: 46 (code-46 transient expected on 1st)
7	attempt 2: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
8	Programming firmware...
9	attempt 2: programming OK
10	=== verify ===
11	post-flash version: 0.4.6
12	RESULT: OK
13

flashing latest_nofastmath.beyondfw -> 76736 bytes @ 0x00404000, expect 0.4.6
pre-flash version: 0.4.5
attempt 1: app->bootloader
attempt 1: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
Programming firmware...
attempt 1: Write error at address 0x00404CC0, code: 46 (code-46 transient expected on 1st)
attempt 2: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
Programming firmware...
attempt 2: programming OK
=== verify ===
post-flash version: 0.4.6
RESULT: OK


nofastmath (0.4.6) flashed + verified. Running session test — isolates `-ffast-math`.


cd C:/Users/decid/Documents/projects/beyond_synaptics/dist && py session_test.py 2>&1 | tail -40

Session test on nofastmath 0.4.6


Command running in background with ID: bmdrx4e8o. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bmdrx4e8o.output. You will be notified when it completes. To check interim output, use Read on that file path.


Running. Awaiting verdict — survives = `-ffast-math` confirmed root cause.


steamvr is running but there's no picture on the hmd displays. might be wedged.


No picture mid-session = likely wedging on `nofastmath` (`-ffast-math` removal alone NOT enough). Checking live test state.


Test still mid-run (output buffers until end). Your "no picture" matches the wedge symptom (displays dark) — `nofastmath` likely wedging, meaning `-ffast-math` removal alone isn't the fix → cause is `-mlong-calls` or the G19 define. Waiting for the programmatic post-exit verdict to confirm. Don't power-cycle yet — let the test finish its quit+liveness check.


confirmed wedge. displays are stuck on + dark, no picture


Wedge confirmed on `nofastmath`. So **`-ffast-math` removal alone does NOT fix it.** Cause is narrowed to **{`-mlong-calls`, G19-define}** (the two things `matchofficial` removed that `nofastmath` didn't).

Building the 2 single-variable isolation variants now (background) so they're ready after power-cycle, and letting the running test finish its SteamVR cleanup.


Agent

Build mlong/G19 isolation variants

Prompt:
Build 2 Beyond MCU firmware variants to isolate which of two build settings causes a wedge. NO flashing, NO git commits. Produce 2 .beyondfw with unique versions.

CONTEXT: A wedging config is `nofastmath` = {newlib-nano, -ffast-math REMOVED, -mlong-calls KEPT, -D__SAMG55G19__ KEPT}. A surviving config removed BOTH -mlong-calls and fixed the G19→J19 define. We need to know which of those two — `-mlong-calls` or the `__SAMG55G19__` define — is the actual cause. So build two variants each differing from the wedging `nofastmath` baseline by EXACTLY ONE setting.

WORKTREE: C:\Users\decid\Documents\projects\bs_trackA (exists, detached at 0.4.3 commit 67bcafd). For EACH variant, reset both files first then apply edits:
  `cd C:/Users/decid/Documents/projects/bs_trackA && git show HEAD:CMakeLists.txt > CMakeLists.txt && git show HEAD:src/sw_ver.h > src/sw_ver.h`

ORIGINAL CMakeLists.txt reference: COMPILER_FLAGS list (~line 21) ends `-ffast-math -mlong-calls)`; add_definitions (~line 28) has `-D__SAMG55G19__`; the GNU branch (~lines 41-47) appends `--specs=nano.specs` (this = newlib-nano; LEAVE IT for both variants below since nano is ruled out as irrelevant). sw_ver.h: `MINOR_VERSION 4`, `PATCH_VERSION 3`.

BASELINE for both = nofastmath config: KEEP `--specs=nano.specs`, REMOVE `-ffast-math` (leave `-mlong-calls`), KEEP `-D__SAMG55G19__`. Then each variant changes ONE more thing:

1. **nomlong** → PATCH_VERSION 8 (version 0.4.8). On top of baseline: ALSO remove `-mlong-calls`. (Net: nano, no -ffast-math, no -mlong-calls, G19 kept.) Package dist/latest_nomlong.beyondfw, `-v 0.4.8`.
2. **j19** → PATCH_VERSION 9 (version 0.4.9). On top of baseline: ALSO change `-D__SAMG55G19__`→`-D__SAMG55J19__` (leave -mlong-calls IN). (Net: nano, no -ffast-math, -mlong-calls kept, J19.) Package dist/latest_j19.beyondfw, `-v 0.4.9`.

TOOLCHAIN PATH (bash): `export PATH="/c/Program Files (x86)/Arm GNU Toolchain arm-none-eabi/12.2 mpacbti-rel1/bin:$LOCALAPPDATA/Microsoft/WinGet/Links:$PATH"`
BUILD (Release only — Debug fails to link): `cmake --preset arm-gcc-toolchain.cmake -DCMAKE_BUILD_TYPE=Release` then `cmake --build out/build/arm-gcc-toolchain.cmake`. Clean rebuild (`rm -rf out/build`) between variants.
PACKAGE (from scripts/, ABSOLUTE paths): `py usb_fw_packager_cli.py -o "<ABS>/dist/Beyond_AppImage_<variant>.hex" "<ABS>/out/build/arm-gcc-toolchain.cmake/beyond_synaptics.hex"` then `py utility_fw_packager_cli.py -v <ver> "<ABS>/dist/Beyond_AppImage_<variant>.hex" "<ABS>/dist/latest_<variant>.beyondfw"` (use `python` if `py` missing).
VERIFY each: `py -c "import sys; sys.path.insert(0,r'C:\Users\decid\Documents\projects\quick-beyond-updater'); import bs_hmd_tools as t; print(t.get_file_fw_version(r'<ABS .beyondfw>'))"` must print 0.4.8 / 0.4.9.

REPORT BACK (concise table): each variant — exact edits, build OK/fail (+first error), .beyondfw path+size, get_file_fw_version. Leave worktree in place. No commits, no flash.


<owl_reachability_notice>
You have an active owl perch. Launch this Agent with run_in_background: true so you stay reachable for incoming messages while it works.
</owl_reachability_notice>


Async agent launched successfully.
agentId: a15237b65eeb3f0b0 (internal ID - do not mention to user. Use SendMessage with to: 'a15237b65eeb3f0b0' to continue this agent.)
The agent is working in the background. You will be notified automatically when it completes.
Do not duplicate this agent's work — avoid working with the same files or topics it is using. Work on non-overlapping tasks, or briefly tell the user what you launched and end your response.
output_file: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\a15237b65eeb3f0b0.output
Do NOT Read or tail this file via the shell tool — it is the full subagent JSONL transcript and reading it will overflow your context. If the user asks for progress, say the agent is still running; you'll get a completion notification.

Build mlong/G19 isolation variants

Prompt:
Build 2 Beyond MCU firmware variants to isolate which of two build settings causes a wedge. NO flashing, NO git commits. Produce 2 .beyondfw with unique versions.

CONTEXT: A wedging config is `nofastmath` = {newlib-nano, -ffast-math REMOVED, -mlong-calls KEPT, -D__SAMG55G19__ KEPT}. A surviving config removed BOTH -mlong-calls and fixed the G19→J19 define. We need to know which of those two — `-mlong-calls` or the `__SAMG55G19__` define — is the actual cause. So build two variants each differing from the wedging `nofastmath` baseline by EXACTLY ONE setting.

WORKTREE: C:\Users\decid\Documents\projects\bs_trackA (exists, detached at 0.4.3 commit 67bcafd). For EACH variant, reset both files first then apply edits:
  `cd C:/Users/decid/Documents/projects/bs_trackA && git show HEAD:CMakeLists.txt > CMakeLists.txt && git show HEAD:src/sw_ver.h > src/sw_ver.h`

ORIGINAL CMakeLists.txt reference: COMPILER_FLAGS list (~line 21) ends `-ffast-math -mlong-calls)`; add_definitions (~line 28) has `-D__SAMG55G19__`; the GNU branch (~lines 41-47) appends `--specs=nano.specs` (this = newlib-nano; LEAVE IT for both variants below since nano is ruled out as irrelevant). sw_ver.h: `MINOR_VERSION 4`, `PATCH_VERSION 3`.

BASELINE for both = nofastmath config: KEEP `--specs=nano.specs`, REMOVE `-ffast-math` (leave `-mlong-calls`), KEEP `-D__SAMG55G19__`. Then each variant changes ONE more thing:

1. **nomlong** → PATCH_VERSION 8 (version 0.4.8). On top of baseline: ALSO remove `-mlong-calls`. (Net: nano, no -ffast-math, no -mlong-calls, G19 kept.) Package dist/latest_nomlong.beyondfw, `-v 0.4.8`.
2. **j19** → PATCH_VERSION 9 (version 0.4.9). On top of baseline: ALSO change `-D__SAMG55G19__`→`-D__SAMG55J19__` (leave -mlong-calls IN). (Net: nano, no -ffast-math, -mlong-calls kept, J19.) Package dist/latest_j19.beyondfw, `-v 0.4.9`.

TOOLCHAIN PATH (bash): `export PATH="/c/Program Files (x86)/Arm GNU Toolchain arm-none-eabi/12.2 mpacbti-rel1/bin:$LOCALAPPDATA/Microsoft/WinGet/Links:$PATH"`
BUILD (Release only — Debug fails to link): `cmake --preset arm-gcc-toolchain.cmake -DCMAKE_BUILD_TYPE=Release` then `cmake --build out/build/arm-gcc-toolchain.cmake`. Clean rebuild (`rm -rf out/build`) between variants.
PACKAGE (from scripts/, ABSOLUTE paths): `py usb_fw_packager_cli.py -o "<ABS>/dist/Beyond_AppImage_<variant>.hex" "<ABS>/out/build/arm-gcc-toolchain.cmake/beyond_synaptics.hex"` then `py utility_fw_packager_cli.py -v <ver> "<ABS>/dist/Beyond_AppImage_<variant>.hex" "<ABS>/dist/latest_<variant>.beyondfw"` (use `python` if `py` missing).
VERIFY each: `py -c "import sys; sys.path.insert(0,r'C:\Users\decid\Documents\projects\quick-beyond-updater'); import bs_hmd_tools as t; print(t.get_file_fw_version(r'<ABS .beyondfw>'))"` must print 0.4.8 / 0.4.9.

REPORT BACK (concise table): each variant — exact edits, build OK/fail (+first error), .beyondfw path+size, get_file_fw_version. Leave worktree in place. No commits, no flash.


Building 2 isolation variants in background: `nomlong` (0.4.8 — removes `-mlong-calls`, keeps G19) and `j19` (0.4.9 — fixes G19→J19, keeps `-mlong-calls`). Each differs from the wedging `nofastmath` by exactly one setting → whichever survives names the culprit.

**Status:**
- `nofastmath` → WEDGE → `-ffast-math` is **not** the cause.
- Cause ∈ **{`-mlong-calls`, G19-define}**.
- Already have a **confirmed-working fix in hand**: `matchofficial` (0.4.5) survived — if you just want it stable now, that's flashable.

HMD is wedged again. **Power-cycle when ready** — then I flash `nomlong`/`j19` to pin the exact cause. (Letting the running test finish its SteamVR cleanup first.)


<task-notification>
<task-id>a15237b65eeb3f0b0</task-id>
<tool-use-id>toolu_01DhT1Z7ojKXQ1meRymfyomc</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\a15237b65eeb3f0b0.output</output-file>
<status>completed</status>
<summary>Agent "Build mlong/G19 isolation variants" completed</summary>
<result>Both firmware variants built successfully. No flashing, no commits. Worktree left in place (detached at 67bcafd; working tree currently holds the j19 edits, dist/ untracked).

## Results

| Variant | Edits vs. nofastmath baseline | Build | .beyondfw path | Size | get_file_fw_version |
|---|---|---|---|---|---|
| **nomlong** | Removed `-ffast-math` (baseline) + **removed `-mlong-calls`**; kept `--specs=nano.specs`, kept `-D__SAMG55G19__`; PATCH_VERSION 8 | OK (warnings only, link OK) | `C:\Users\decid\Documents\projects\bs_trackA\dist\latest_nomlong.beyondfw` | 73,134 B | **0.4.8** |
| **j19** | Removed `-ffast-math` (baseline) + **changed `-D__SAMG55G19__`→`-D__SAMG55J19__`**; kept `--specs=nano.specs`, kept `-mlong-calls`; PATCH_VERSION 9 | OK (warnings only, link OK) | `C:\Users\decid\Documents\projects\bs_trackA\dist\latest_j19.beyondfw` | 76,910 B | **0.4.9** |

### Method notes
- For each variant: reset both files via `git show HEAD:...` first, confirmed HEAD baseline matches the reference exactly (`-ffast-math -mlong-calls)` on line 21, `-D__SAMG55G19__` on line 28, PATCH 3), then applied the single delta.
- Each differs from the wedging `nofastmath` config by **exactly one** setting — nomlong drops `-mlong-calls`; j19 flips the define. Everything else (nano specs, no -ffast-math) held constant.
- Release build per instructions (`-DCMAKE_BUILD_TYPE=Release`), clean `rm -rf out/build` between variants.
- Both linked cleanly; only benign warnings (FreeRTOS `tasks.c` array-bounds notes, RWX LOAD-segment warning) — no errors.

### Build size signal (incidental, may aid your wedge analysis)
`.text` grew 72,164 → 75,956 (+3,792 B) from nomlong to j19 — consistent with `-mlong-calls` being retained in the j19 build and dropped in nomlong. The two variants are genuinely different binaries.

Intermediate `Beyond_AppImage_nomlong.hex/.bin` and `Beyond_AppImage_j19.hex/.bin` are also in `dist\`.</result>
<usage><subagent_tokens>53974</subagent_tokens><tool_uses>24</tool_uses><duration_ms>142269</duration_ms></usage>
</task-notification>


CAVEMAN MODE ACTIVE (full). Drop articles/filler/pleasantries/hedging. Fragments OK. Code/commits/security: write normal.


<owl_messages>
<owl_message from="solar-w11" priority="info">[WORKING_PERCH_NOTICE] Subagent working perch created.
Perch: solar-w11
Agent type: general-purpose
To message it: $OWL send solar-w11 solar</owl_message>
</owl_messages>

[OWL SYSTEM] Informational owl messages above — no acknowledgment needed. Continue your current task.

<owl_reachability_notice>
You have an active owl perch. When spawning subagents or doing work, use run_in_background: true so you stay reachable for incoming messages.
</owl_reachability_notice>


Isolation variants ready: `nomlong` (0.4.8), `j19` (0.4.9). Checking the finished test + HMD state.


Bash

echo "===session_test verdict===" && cat "C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bmdrx4e8o.output" 2>/dev/null | tail -15 && echo "" && echo "===HMD alive now?===" && cd C:/Users/decid/Documents/projects && py -c "
import sys,os; sys.path.insert(0,r'C:\Users\decid\Documents\projects\quick-beyond-updater')
import hid, bs_hmd_tools as t
ap=next((d['path'] for d in hid.enumerate(vendor_id=0x35BD,product_id=0x0101)),None)
print('version:', t.get_hmd_fw_version(device_path=ap) if ap else 'NO 0101')
" 2>&1 | tail -3

Read test verdict + HMD recovery state


Command running in background with ID: brgksd5k1. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\brgksd5k1.output. You will be notified when it completes. To check interim output, use Read on that file path.


1	===session_test verdict===
2
3	===HMD alive now?===
4

===session_test verdict===

===HMD alive now?===


Wasted call — file unchanged since your last Read. Refer to that earlier tool_result instead.


Waiting for the read to complete.


<task-notification>
<task-id>brgksd5k1</task-id>
<tool-use-id>toolu_01LRXuv4VYGVFvrt5E6iqWuE</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\brgksd5k1.output</output-file>
<status>completed</status>
<summary>Background command "Read test verdict + HMD recovery state" completed (exit code 0)</summary>
</task-notification>


<owl_reachability_notice>
You have an active owl perch. When spawning subagents or doing work, use run_in_background: true so you stay reachable for incoming messages.
</owl_reachability_notice>


1	===session_test verdict===
2
3	===HMD alive now?===
4	version: None
5

===session_test verdict===

===HMD alive now?===
version: None


HMD confirmed wedged (version None) — needs power-cycle. Both isolation variants ready.

Likely culprit reasoning: **G19→J19 is probably benign** (same die/register map, only pin-macro count differs, and it compiled clean) → **`-mlong-calls` is the more likely cause**. So flash `nomlong` first — if it survives, one test pins it.

**Power-cycle the HMD when ready.** Then I flash `nomlong` (0.4.8, `-mlong-calls` removed):
- survives → `-mlong-calls` confirmed → ship 0.4.4 minimal fix.
- wedges → by elimination G19-define is it → confirm with `j19` (0.4.9).

Ping me when power-cycled.


<task-notification>
<task-id>bmdrx4e8o</task-id>
<tool-use-id>toolu_01EPpp93ATwcUMoLARQtczDb</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bmdrx4e8o.output</output-file>
<status>completed</status>
<summary>Background command "Session test on nofastmath 0.4.6" completed (exit code 0)</summary>
</task-notification>


1	PRE-SESSION MCU: 0.4.6
2	launching SteamVR (appid 250820)...
3	  SteamVR up after ~2s: ['vrserver.exe']
4	session running 45s (addons co-driving MCU)...
5	MID-SESSION MCU: None
6	session running another 30s...
7	quitting SteamVR...
8	  force-killing remaining: ['vrserver.exe', 'vrmonitor.exe']
9	  post-quit procs: []
10	waiting 6s for addons to release 0101...
11	POST-EXIT MCU (attempt 1): None
12	POST-EXIT MCU (attempt 2): None
13	=== VERDICT: WEDGED - MCU UNRESPONSIVE ===
14

PRE-SESSION MCU: 0.4.6
launching SteamVR (appid 250820)...
  SteamVR up after ~2s: ['vrserver.exe']
session running 45s (addons co-driving MCU)...
MID-SESSION MCU: None
session running another 30s...
quitting SteamVR...
  force-killing remaining: ['vrserver.exe', 'vrmonitor.exe']
  post-quit procs: []
waiting 6s for addons to release 0101...
POST-EXIT MCU (attempt 1): None
POST-EXIT MCU (attempt 2): None
=== VERDICT: WEDGED - MCU UNRESPONSIVE ===


power cycle done


Programmatic verdict on `nofastmath` matches your observation: **WEDGED** (mid-session None → wedges *during* session, post-exit dead).

Consolidated:

| Variant | -ffast-math | -mlong-calls | define | Result |
|---|---|---|---|---|
| official 0.3.18 (control) | no | no | J19 | **survive** |
| nonano 0.4.4 | yes | yes | G19 | wedge |
| matchofficial 0.4.5 | no | no | J19 | **survive** |
| nofastmath 0.4.6 | no | yes | G19 | wedge |

Cause = `-mlong-calls` or G19-define. Standing by for power-cycle → flash `nomlong` (0.4.8) first.


Power-cycle confirmed. Flashing `nomlong` (0.4.8 — `-mlong-calls` removed, G19 kept).


cd C:/Users/decid/Documents/projects/beyond_synaptics/dist && py flash_variant.py "C:\Users\decid\Documents\projects\bs_trackA\dist\latest_nomlong.beyondfw" "0.4.8" 2>&1 | tail -15

Flash nomlong 0.4.8


Command running in background with ID: b1q07ezex. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\b1q07ezex.output. You will be notified when it completes. To check interim output, use Read on that file path.


<system-reminder>Warning: the file exists but is shorter than the provided offset (1). The file has 1 lines.</system-reminder>


<task-notification>
<task-id>b1q07ezex</task-id>
<tool-use-id>toolu_01LEvxudtkRRiZ3pnAagPv28</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\b1q07ezex.output</output-file>
<status>completed</status>
<summary>Background command "Flash nomlong 0.4.8" completed (exit code 0)</summary>
</task-notification>


1	flashing latest_nomlong.beyondfw -> 73056 bytes @ 0x00404000, expect 0.4.8
2	pre-flash version: 0.4.6
3	attempt 1: app->bootloader
4	attempt 1: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
5	Programming firmware...
6	attempt 1: Write error at address 0x00404F00, code: 46 (code-46 transient expected on 1st)
7	attempt 2: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
8	Programming firmware...
9	attempt 2: programming OK
10	=== verify ===
11	post-flash version: 0.4.8
12	RESULT: OK
13

flashing latest_nomlong.beyondfw -> 73056 bytes @ 0x00404000, expect 0.4.8
pre-flash version: 0.4.6
attempt 1: app->bootloader
attempt 1: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
Programming firmware...
attempt 1: Write error at address 0x00404F00, code: 46 (code-46 transient expected on 1st)
attempt 2: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
Programming firmware...
attempt 2: programming OK
=== verify ===
post-flash version: 0.4.8
RESULT: OK


nomlong (0.4.8) flashed + verified (recovered to 0.4.6 post-power-cycle, now 0.4.8). Running session test — isolates `-mlong-calls`.


cd C:/Users/decid/Documents/projects/beyond_synaptics/dist && py session_test.py 2>&1 | tail -40

Session test on nomlong 0.4.8


Command running in background with ID: by424gjn6. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\by424gjn6.output. You will be notified when it completes. To check interim output, use Read on that file path.


Running. Survives → `-mlong-calls` is the culprit. Awaiting verdict.


<task-notification>
<task-id>by424gjn6</task-id>
<tool-use-id>toolu_01Q81RKXQouWXXg542WGq86A</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\by424gjn6.output</output-file>
<status>completed</status>
<summary>Background command "Session test on nomlong 0.4.8" completed (exit code 0)</summary>
</task-notification>


CAVEMAN MODE ACTIVE (full). Drop articles/filler/pleasantries/hedging. Fragments OK. Code/commits/security: write normal.


1	PRE-SESSION MCU: 0.4.8
2	launching SteamVR (appid 250820)...
3	  SteamVR up after ~2s: ['vrserver.exe']
4	session running 45s (addons co-driving MCU)...
5	MID-SESSION MCU: 0.4.8
6	session running another 30s...
7	quitting SteamVR...
8	  force-killing remaining: ['vrserver.exe', 'vrmonitor.exe']
9	  post-quit procs: []
10	waiting 6s for addons to release 0101...
11	POST-EXIT MCU (attempt 1): 0.4.8
12	POST-EXIT MCU (attempt 2): 0.4.8
13	=== VERDICT: ALIVE - NO WEDGE ===
14

PRE-SESSION MCU: 0.4.8
launching SteamVR (appid 250820)...
  SteamVR up after ~2s: ['vrserver.exe']
session running 45s (addons co-driving MCU)...
MID-SESSION MCU: 0.4.8
session running another 30s...
quitting SteamVR...
  force-killing remaining: ['vrserver.exe', 'vrmonitor.exe']
  post-quit procs: []
waiting 6s for addons to release 0101...
POST-EXIT MCU (attempt 1): 0.4.8
POST-EXIT MCU (attempt 2): 0.4.8
=== VERDICT: ALIVE - NO WEDGE ===


**`-mlong-calls` CONFIRMED ROOT CAUSE.** `nomlong` (0.4.8) **SURVIVES** — and its *only* difference from the wedging `nofastmath` is `-mlong-calls` removed. G19-define **ruled out** (nomlong keeps G19, survives).

Final table:

| Variant | -ffast-math | **-mlong-calls** | define | Result |
|---|---|---|---|---|
| official 0.3.18 | no | **no** | J19 | survive |
| nonano | yes | **yes** | G19 | wedge |
| matchofficial | no | **no** | J19 | survive |
| nofastmath | no | **yes** | G19 | wedge |
| **nomlong** | no | **no** | G19 | **survive** |

Perfect correlation with `-mlong-calls`. The CMake build added `-mlong-calls` (official `.cproj` has none); under SteamVR-addon load it wedges the MCU.

Ship config = **`fullfix`** (nano, `-mlong-calls` removed [the fix] + `-ffast-math` removed [FP footgun] + J19 [typo fix]). HMD is alive now (nomlong survived) — flashing `fullfix` for final ship-config validation, no power-cycle needed.


cd C:/Users/decid/Documents/projects/beyond_synaptics/dist && py flash_variant.py "C:\Users\decid\Documents\projects\bs_trackA\dist\latest_fullfix.beyondfw" "0.4.7" 2>&1 | tail -15

Flash fullfix 0.4.7 ship-config


Command running in background with ID: buz7edyfc. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\buz7edyfc.output. You will be notified when it completes. To check interim output, use Read on that file path.


Recording root cause while the ship-config flash runs.


Edit

ROOT CAUSE (confirmed by Brandon 2026-06-13, SteamVR-alone repro, NO sauna): a beyond_synaptics **0.4.x firmware** regression.

**ROOT CAUSE FOUND & HARDWARE-CONFIRMED 2026-06-15: the CMake build flag `-mlong-calls`** (in `beyond_synaptics/CMakeLists.txt` COMPILER_FLAGS; the official Studio `.cproj` has NO such flag). Under SteamVR-addon load it wedges the MCU. NOT a firmware-source bug — the doze source is inert without the doze HID opcodes (addons never send 0x48/0x68). Isolated by building 7 single-variable variants + on-HMD A/B flash/SteamVR-session testing (harness validated against official 0.3.18 which survives): perfect correlation — every variant WITH `-mlong-calls` wedges (nonano, nofastmath), every variant WITHOUT it survives (matchofficial, nomlong, official 0.3.18). `-ffast-math` (also CMake-added, crtfastmath FPSCR-set gc'd out) and `__SAMG55G19__` typo and newlib-nano were each ruled out (nomlong keeps nano+G19, only drops -mlong-calls → survives). FIX: remove `-mlong-calls` from CMakeLists (also remove `-ffast-math` = FP footgun, fix `__SAMG55G19__`→`__SAMG55J19__` = correctness). Validated ship config = "fullfix". Test harness: `beyond_synaptics/dist/{flash_variant.py,session_test.py}`; wedge detector = `get_hmd_fw_version`→None post-SteamVR-exit (also dies MID-session — addon does NOT exclusively hold 0101, a live MCU ACKs mid-session). Recovery = physical power-cycle only.

ORIGINAL SYMPTOM (confirmed by Brandon 2026-06-13, SteamVR-alone repro, NO sauna): a beyond_synaptics **0.4.x firmware** regression —


The file C:\Users\decid\.ccs\instances\bigscreen\projects\C--Users-decid-Documents-projects-sauna\memory\steamvr-forcekill-mcu-hang.md has been updated successfully. (file state is current in your context — no need to Read it back)

**ROOT CAUSE FOUND & HARDWARE-CONFIRMED 2026-06-15: the CMake build flag `-mlong-calls`** (in `beyond_synaptics/CMakeLists.txt` COMPILER_FLAGS; the official Studio `.cproj` has NO such flag). Under SteamVR-addon load it wedges the MCU. NOT a firmware-source bug — the doze source is inert without the doze HID opcodes (addons never send 0x48/0x68). Isolated by building 7 single-variable variants + on-HMD A/B flash/SteamVR-session testing (harness validated against official 0.3.18 which survives): perfect correlation — every variant WITH `-mlong-calls` wedges (nonano, nofastmath), every variant WITHOUT it survives (matchofficial, nomlong, official 0.3.18). `-ffast-math` (also CMake-added, crtfastmath FPSCR-set gc'd out) and `__SAMG55G19__` typo and newlib-nano were each ruled out (nomlong keeps nano+G19, only drops -mlong-calls → survives). FIX: remove `-mlong-calls` from CMakeLists (also remove `-ffast-math` = FP footgun, fix `__SAMG55G19__`→`__SAMG55J19__` = correctness). Validated ship config = "fullfix". Test harness: `beyond_synaptics/dist/{flash_variant.py,session_test.py}`; wedge detector = `get_hmd_fw_version`→None post-SteamVR-exit (also dies MID-session — addon does NOT exclusively hold 0101, a live MCU ACKs mid-session). Recovery = physical power-cycle only.

ORIGINAL SYMPTOM (confirmed by Brandon 2026-06-13, SteamVR-alone repro, NO sauna): a beyond_synaptics **0.4.x firmware** regression —

---
name: steamvr-forcekill-mcu-hang
description: 0.4.x firmware wedges the Beyond when any SteamVR Beyond-addon runs — prox dies, brightness sticks ~7, power-cycle to recover
metadata:
  node_type: memory
  type: project
  originSessionId: 92a9c1d9-a8d0-47c8-b932-02f7be39d701
---

ROOT CAUSE (confirmed by Brandon 2026-06-13, SteamVR-alone repro, NO sauna): a beyond_synaptics **0.4.x firmware** regression. Whenever EITHER official SteamVR addon (BeyondEyetracking OR BeyondSteamVR) runs, the Beyond's **proximity sensor stops working for that session** (reads untriggered → displays show picture but brightness latched ~7 ≈ a doze-floor value). Then a **SteamVR shutdown leaves the Beyond WEDGED** — usually the RIGHT optic lit with a dim/black image; MCU 0101 still enumerates but stops ACKing (`get_hmd_fw_version` → None). Recovers ONLY on a physical power-cycle. NOT present on pre-0.4.0 firmware (before the M5 doze mods). So a 0.4.x doze/prox/brightness change broke it.

**Earlier wrong theories (this same session) — do NOT trust them:** (1) "force-killing SteamVR mid-session hangs the MCU" and (2) "SteamVR's BeyondProximity driver collides with sauna on 0101." Both were conjecture. Deregistering BeyondProximity (vrpathreg) did NOT fix it; the wedge reproduces with sauna not running at all and with a clean SteamVR quit. **sauna is blameless.**

**Why it matters:** blocks SteamVR coexistence on 0.4.x firmware — the whole point of sauna is to coexist with SteamVR.

**DISPROVEN 2026-06-13 (source-checked, not guessed):** the "doze logic mishandles an addon HID command" theory is dead. (1) The doze state (`doze_active` latch) can ONLY be set by a feature report with `report[0]==0x48` ('H' sleep); wake is 0x68 ('h'). (2) The addons' full command set is in `../HMDUtility/src/hid_handler.cpp` — every code it sends to 0101: `2A 25 26 7E 5E 5A 53 47 67 46 66 52 50 49 42 65 4C 55 57 56 4D 4B 54 44 41 59 4E 4A 40 64 6F 22`. **No 0x48, no 0x68.** So doze never triggers in an addon session and every doze branch in `video_proc.c` is provably inert (all gate on `doze_active`/`doze_phase`, which stay false). Frame note: HMDUtility sends `[0]=0x00 ReportID,[1]=Code`; USB strips the report-ID so firmware `report[0]`==Code.

**Remaining real variables (v0.3.19 shipped → 0.4.3 flashed; 0.4.3 is a strict SUPERSET of v0.3.19 source, no lost commits):** only TWO things differ on always-run / addon-driven paths: (1) **fan kickstart** (`test_and_debug.c` task_fan: jumps to `FAN_MIN_START`=35 on any 0→N fan change; addon drives fan via 0x46/0x66) + `#include <math.h>`/libm linkage; (2) the **BUILD/TOOLCHAIN** — 0.4.3 is the headless CMake/arm-gcc-12.2 `-O3` build ([[beyond-synaptics-firmware-build]]) vs the official Studio build of the known-good firmware. Build had documented hazards incl. CMSIS `adc.h` shadowing `src/Drivers/adc.h` — and **prox reads via ADC**, matching "prox stops working." NOTE: still need to confirm the actual known-good baseline (official production binary, possibly NOT in this repo — v0.3.19 is just the latest tag).

Also ELIMINATED: v0.3.18→v0.3.19 source delta (baseline was v0.3.18; HMD jumped straight 0.3.18→0.4.3). That delta is ONLY an RGB-LED-animation feature (commit b2c696a: `report[4]` mode byte on the 'L'/0x4c cmd + LED blinking task). LED-task only, can't gate prox/HID. Not the wedge.

**LEADING HYPOTHESIS = BUILD/TOOLCHAIN (source is inert).** The 0.4.3 flashed is the headless CMake/arm-gcc-12.2 build; known-good v0.3.18 was an official build. Compared `CMakeLists.txt` vs `Beyond_Synaptics.cproj`, CMake-introduced deviations: **`-ffast-math`** (Studio has none — sets FPU FZ/default-NaN globally at startup via crtfastmath, changes ALL float behavior → PRIME suspect), `-mlong-calls`, `--specs=nano.specs`/`-lc_nano` (newlib-nano: smaller reentrancy/heap vs full newlib), and `-D__SAMG55G19__` typo (chip is J19; selects samg55g19.h CMSIS header — compile-benign since no J19-only pin macros referenced, but WRONG, fix to `__SAMG55J19__`). NOTE: `.cproj` is NOT the true production config — it has `BOARD=SAMG55_XPLAINED_PRO` but real Beyond HW init is gated `#if BOARD==USER_EXT_BOARD` (main.c 149/168/326, usart_interface.c 158), and CMake correctly uses `USER_EXT_BOARD`. So `.cproj` board/linker(`flash_usb_bootloader.ld` for AppImage) deltas are likely intentional-correct; trust the prebuilt AppImage hex (official Studio artifacts, in-repo up to `build/v0.3.9/Beyond_AppImage_v039_250328.hex`) as the real baseline, NOT `.cproj`. No prebuilt 0.3.10–0.3.19 committed.

**EXPERIMENTS DONE 2026-06-14 (build-isolation, no flash yet):**
- Track B reproduced v0.3.18 source via CMake toolchain, binary-diffed vs official 0.3.18 (`HMDUtility/src/latest.beyondfw`, the real prebuilt). Source list byte-identical to v0.3.18 `.cproj` (68 files) → reproduction faithful, delta is purely build-system. ~96% bytes differ (Studio-gcc vs arm-gcc-12.2/-O3).
- **`-ffast-math` FPSCR-flush theory DISPROVEN:** crtfastmath `set_fast_math` ctor is dropped by `-Wl,--gc-sections` (SAMG linker script doesn't KEEP its `.init_array` entry) — no `vmsr fpscr` in image, FPU stays at reset default. `-ffast-math` only changes per-TU codegen now (weaker suspect).
- **newlib-nano CONFIRMED the CMake-added deviation:** CMakeLists appends `--specs=nano.specs`→`-lc_nano`, `_impure_data`=76B; official `.cproj` has NO `--specs` → official=full newlib (`_impure_data`=288B). Nano's tiny shared reent under FreeRTOS multitask addon load = top wedge suspect (load-dependent, matches "fine in light doze bench, wedges under addon"). Linker `flash_usb_bootloader.ld` is CORRECT (official 0.3.18 also starts 0x404000).

**4 FLASHABLE VARIANTS BUILT in worktree `../bs_trackA/dist/` (all v0.4.4, start 0x404000, NOT flashed — human must flash):** `latest_nonano.beyondfw` (full newlib, else stock — single-var nano test), `latest_matchofficial.beyondfw` (full newlib + no -ffast-math + no -mlong-calls + J19 fix — best-shot fix), `latest_nofastmath.beyondfw` (nano kept, -ffast-math removed), `latest_fullfix.beyondfw` (nano kept, -ffast-math+mlong-calls removed, J19). Worktree CMakeLists.txt currently holds the matchofficial edits (uncommitted).

**FLASH DECISION TREE (each = flash + SteamVR+BeyondEyetracking+BeyondSteamVR session, NO sauna; watch prox alive / brightness not latched / no exit-wedge):** Flash `nonano` FIRST (single-var, top suspect). GONE ⇒ newlib-nano sole cause → ship 0.4.4 = drop `--specs=nano.specs` only (minimal). Still wedges ⇒ flash `matchofficial`: GONE ⇒ it's -ffast-math/-mlong-calls (bisect via `nofastmath`); still wedges ⇒ cause is gcc-12.2/-O3 codegen itself (match official gcc ver or drop to -O2). Flash via `reflash_doze.py` pattern, code-46 retry (re-target 35BD:4004), verify `get_hmd_fw_version`→"0.4.4". Don't power past a wedge — power-cycle first. Cleanup when done: `git worktree remove ../bs_trackA ../bs_v0318`. Related: [[beyond-synaptics-firmware-build]], [[hmd-bench-rig]].

-ROOT CAUSE (confirmed by Brandon 2026-06-13, SteamVR-alone repro, NO sauna): a beyond_synaptics **0.4.x firmware** regression. Whenever EITHER official SteamVR addon (BeyondEyetracking OR BeyondSteamVR) runs, the Beyond's **proximity sensor stops working for that session** (reads untriggered → displays show picture but brightness latched ~7 ≈ a doze-floor value). Then a **SteamVR shutdown leaves the Beyond WEDGED** — usually the RIGHT optic lit with a dim/black image; MCU 0101 still enumerates but stops ACKing (`get_hmd_fw_version` → None). Recovers ONLY on a physical power-cycle. NOT present on pre-0.4.0 firmware (before the M5 doze mods). So a 0.4.x doze/prox/brightness change broke it.

+**ROOT CAUSE FOUND & HARDWARE-CONFIRMED 2026-06-15: the CMake build flag `-mlong-calls`** (in `beyond_synaptics/CMakeLists.txt` COMPILER_FLAGS; the official Studio `.cproj` has NO such flag). Under SteamVR-addon load it wedges the MCU. NOT a firmware-source bug — the doze source is inert without the doze HID opcodes (addons never send 0x48/0x68). Isolated by building 7 single-variable variants + on-HMD A/B flash/SteamVR-session testing (harness validated against official 0.3.18 which survives): perfect correlation — every variant WITH `-mlong-calls` wedges (nonano, nofastmath), every variant WITHOUT it survives (matchofficial, nomlong, official 0.3.18). `-ffast-math` (also CMake-added, crtfastmath FPSCR-set gc'd out) and `__SAMG55G19__` typo and newlib-nano were each ruled out (nomlong keeps nano+G19, only drops -mlong-calls → survives). FIX: remove `-mlong-calls` from CMakeLists (also remove `-ffast-math` = FP footgun, fix `__SAMG55G19__`→`__SAMG55J19__` = correctness). Validated ship config = "fullfix". Test harness: `beyond_synaptics/dist/{flash_variant.py,session_test.py}`; wedge detector = `get_hmd_fw_version`→None post-SteamVR-exit (also dies MID-session — addon does NOT exclusively hold 0101, a live MCU ACKs mid-session). Recovery = physical power-cycle only.

+ORIGINAL SYMPTOM (confirmed by Brandon 2026-06-13, SteamVR-alone repro, NO sauna): a beyond_synaptics **0.4.x firmware** regression — Whenever EITHER official SteamVR addon (BeyondEyetracking OR BeyondSteamVR) runs, the Beyond's **proximity sensor stops working for that session** (reads untriggered → displays show picture but brightness latched ~7 ≈ a doze-floor value). Then a **SteamVR shutdown leaves the Beyond WEDGED** — usually the RIGHT optic lit with a dim/black image; MCU 0101 still enumerates but stops ACKing (`get_hmd_fw_version` → None). Recovers ONLY on a physical power-cycle. NOT present on pre-0.4.0 firmware (before the M5 doze mods). So a 0.4.x doze/prox/brightness change broke it.


Memory updated with root cause. Flash running — will run final session test on `fullfix` when it verifies.


<task-notification>
<task-id>buz7edyfc</task-id>
<tool-use-id>toolu_01XLJGVrTrLdzvYYx6m8mzdR</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\buz7edyfc.output</output-file>
<status>completed</status>
<summary>Background command "Flash fullfix 0.4.7 ship-config" completed (exit code 0)</summary>
</task-notification>


<owl_reachability_notice>
You have an active owl perch. When spawning subagents or doing work, use run_in_background: true so you stay reachable for incoming messages.
</owl_reachability_notice>


1	flashing latest_fullfix.beyondfw -> 73152 bytes @ 0x00404000, expect 0.4.7
2	pre-flash version: 0.4.8
3	attempt 1: app->bootloader
4	attempt 1: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
5	Programming firmware...
6	attempt 1: Write error at address 0x00404880, code: 46 (code-46 transient expected on 1st)
7	attempt 2: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
8	Programming firmware...
9	attempt 2: programming OK
10	=== verify ===
11	post-flash version: 0.4.7
12	RESULT: OK
13

flashing latest_fullfix.beyondfw -> 73152 bytes @ 0x00404000, expect 0.4.7
pre-flash version: 0.4.8
attempt 1: app->bootloader
attempt 1: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
Programming firmware...
attempt 1: Write error at address 0x00404880, code: 46 (code-46 transient expected on 1st)
attempt 2: programming via \\?\HID#VID_35BD&PID_4004#c&2dbb630a&2&0000#{4
Programming firmware...
attempt 2: programming OK
=== verify ===
post-flash version: 0.4.7
RESULT: OK


fullfix (0.4.7, ship config) flashed + verified. Final validation session test.


Bash

cd C:/Users/decid/Documents/projects/beyond_synaptics/dist && py session_test.py 2>&1 | tail -40

Final session test on fullfix 0.4.7


Command running in background with ID: bj5lr479s. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bj5lr479s.output. You will be notified when it completes. To check interim output, use Read on that file path.


Running final validation. Awaiting verdict on the exact ship config.


<task-notification>
<task-id>bj5lr479s</task-id>
<tool-use-id>toolu_014KerwAkpwJgLPKz1NyR1zC</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-sauna\d3fb9be1-d61d-4f88-b77c-2a2a282b11fd\tasks\bj5lr479s.output</output-file>
<status>completed</status>
<summary>Background command "Final session test on fullfix 0.4.7" completed (exit code 0)</summary>
</task-notification>


1	PRE-SESSION MCU: 0.4.7
2	launching SteamVR (appid 250820)...
3	  SteamVR up after ~2s: ['vrserver.exe']
4	session running 45s (addons co-driving MCU)...
5	MID-SESSION MCU: 0.4.7
6	session running another 30s...
7	quitting SteamVR...
8	  force-killing remaining: ['vrserver.exe', 'vrmonitor.exe']
9	  post-quit procs: []
10	waiting 6s for addons to release 0101...
11	POST-EXIT MCU (attempt 1): 0.4.7
12	POST-EXIT MCU (attempt 2): 0.4.7
13	=== VERDICT: ALIVE - NO WEDGE ===
14

PRE-SESSION MCU: 0.4.7
launching SteamVR (appid 250820)...
  SteamVR up after ~2s: ['vrserver.exe']
session running 45s (addons co-driving MCU)...
MID-SESSION MCU: 0.4.7
session running another 30s...
quitting SteamVR...
  force-killing remaining: ['vrserver.exe', 'vrmonitor.exe']
  post-quit procs: []
waiting 6s for addons to release 0101...
POST-EXIT MCU (attempt 1): 0.4.7
POST-EXIT MCU (attempt 2): 0.4.7
=== VERDICT: ALIVE - NO WEDGE ===


**`fullfix` (0.4.7, ship config) SURVIVES — ALIVE, NO WEDGE.** Ship config validated end-to-end.

## Root cause: SOLVED
`-mlong-calls` in `beyond_synaptics/CMakeLists.txt` (CMake-added; official Studio build never had it) wedges the MCU under SteamVR-addon load. Perfect 5/5 correlation across variants + validated against known-good 0.3.18 control.

Now landing the real fix. Reading exact source to edit the main repo.


10	set(CPU_FLAGS -mthumb -mcpu=cortex-m4 -mfloat-abi=softfp -mfpu=fpv4-sp-d16)
11	# set(COMPILER_FLAGS -ffreestanding -ffunction-sections -fdata-sections -fsigned-char -fmessage-length=0 -fshort-enums)
12	set(COMPILER_FLAGS -pipe -fno-strict-aliasing -Wall -Wstrict-prototypes -Wmissing-prototypes
13	 -Werror-implicit-function-declaration -Wpointer-arith -std=gnu99
14	 -ffunction-sections -fdata-sections -Wchar-subscripts -Wcomment
15	 -Wformat=2 -Wimplicit-int -Wmain -Wparentheses -Wsequence-point
16	 -Wreturn-type -Wswitch -Wtrigraphs -Wunused -Wuninitialized -Wunknown-pragmas -Wno-expansion-to-defined
17	 -Wfloat-equal -Wundef -Wshadow -Wbad-function-cast -Wwrite-strings -Wsign-compare
18	 -Waggregate-return -Wmissing-declarations -Wformat -Wmissing-format-attribute
19	 -Wno-deprecated-declarations -Wpacked -Wredundant-decls -Wnested-externs -Wlong-long
20	 -Wunreachable-code -Wcast-align --param max-inline-insns-single=500
21	 -ffast-math -mlong-calls)
22
23
24	set(LINKER_FILE "${CMAKE_CURRENT_LIST_DIR}/src/ASF/sam/utils/linker_scripts/samg/samg55j19/gcc/flash_usb_bootloader.ld")
25
26	add_compile_options(${CPU_FLAGS} ${COMPILER_FLAGS})
27	add_link_options(${CPU_FLAGS})
28	add_definitions(-D__SAMG55G19__ -DARM_MATH_CM4=true -Dprintf=iprintf -D__FREERTOS__ -Dscanf=iscanf -DBOARD=USER_EXT_BOARD -DUDD_ENABLE -DNOTBOARD=SAMG55_XPLAINED_PRO -DUSER_BOARD_REVISION=4)
29

set(CPU_FLAGS -mthumb -mcpu=cortex-m4 -mfloat-abi=softfp -mfpu=fpv4-sp-d16)
# set(COMPILER_FLAGS -ffreestanding -ffunction-sections -fdata-sections -fsigned-char -fmessage-length=0 -fshort-enums)
set(COMPILER_FLAGS -pipe -fno-strict-aliasing -Wall -Wstrict-prototypes -Wmissing-prototypes
 -Werror-implicit-function-declaration -Wpointer-arith -std=gnu99
 -ffunction-sections -fdata-sections -Wchar-subscripts -Wcomment
 -Wformat=2 -Wimplicit-int -Wmain -Wparentheses -Wsequence-point
 -Wreturn-type -Wswitch -Wtrigraphs -Wunused -Wuninitialized -Wunknown-pragmas -Wno-expansion-to-defined
 -Wfloat-equal -Wundef -Wshadow -Wbad-function-cast -Wwrite-strings -Wsign-compare
 -Waggregate-return -Wmissing-declarations -Wformat -Wmissing-format-attribute
 -Wno-deprecated-declarations -Wpacked -Wredundant-decls -Wnested-externs -Wlong-long
 -Wunreachable-code -Wcast-align --param max-inline-insns-single=500
 -ffast-math -mlong-calls)

set(LINKER_FILE "${CMAKE_CURRENT_LIST_DIR}/src/ASF/sam/utils/linker_scripts/samg/samg55j19/gcc/flash_usb_bootloader.ld")

add_compile_options(${CPU_FLAGS} ${COMPILER_FLAGS})
add_link_options(${CPU_FLAGS})
add_definitions(-D__SAMG55G19__ -DARM_MATH_CM4=true -Dprintf=iprintf -D__FREERTOS__ -Dscanf=iscanf -DBOARD=USER_EXT_BOARD -DUDD_ENABLE -DNOTBOARD=SAMG55_XPLAINED_PRO -DUSER_BOARD_REVISION=4)


Edit

 -Wunreachable-code -Wcast-align --param max-inline-insns-single=500
 -ffast-math -mlong-calls)

 -Wunreachable-code -Wcast-align --param max-inline-insns-single=500)
# NOTE: -mlong-calls REMOVED (0.4.4) — it wedged the MCU under SteamVR addon
# load (BeyondEyetracking/BeyondSteamVR co-driving 0101); hardware-isolated as
# the sole cause. -ffast-math also removed (unsafe FP / -ffinite-math-only kills
# NaN guards; its crtfastmath FPSCR init was gc-sections'd out anyway). The
# official Studio .cproj uses neither flag.


The file C:\Users\decid\Documents\projects\beyond_synaptics\CMakeLists.txt has been updated successfully. (file state is current in your context — no need to Read it back)

 -Wunreachable-code -Wcast-align --param max-inline-insns-single=500)
# NOTE: -mlong-calls REMOVED (0.4.4) — it wedged the MCU under SteamVR addon
# load (BeyondEyetracking/BeyondSteamVR co-driving 0101); hardware-isolated as
# the sole cause. -ffast-math also removed (unsafe FP / -ffinite-math-only kills
# NaN guards; its crtfastmath FPSCR init was gc-sections'd out anyway). The
# official Studio .cproj uses neither flag.

cmake_minimum_required(VERSION 3.10)
project(beyond_synaptics C CXX ASM)

set(CMAKE_EXECUTABLE_SUFFIX ".elf")
set(CMAKE_C_COMPILER_TARGET thumbv7m-unknown-none-eabi)
set(CMAKE_CXX_COMPILER_TARGET thumbv7m-unknown-none-eabi)
set(CMAKE_C_STANDARD 11)
set(CMAKE_C_STANDARD_REQUIRED ON)

set(CPU_FLAGS -mthumb -mcpu=cortex-m4 -mfloat-abi=softfp -mfpu=fpv4-sp-d16)
# set(COMPILER_FLAGS -ffreestanding -ffunction-sections -fdata-sections -fsigned-char -fmessage-length=0 -fshort-enums)
set(COMPILER_FLAGS -pipe -fno-strict-aliasing -Wall -Wstrict-prototypes -Wmissing-prototypes
 -Werror-implicit-function-declaration -Wpointer-arith -std=gnu99
 -ffunction-sections -fdata-sections -Wchar-subscripts -Wcomment
 -Wformat=2 -Wimplicit-int -Wmain -Wparentheses -Wsequence-point
 -Wreturn-type -Wswitch -Wtrigraphs -Wunused -Wuninitialized -Wunknown-pragmas -Wno-expansion-to-defined
 -Wfloat-equal -Wundef -Wshadow -Wbad-function-cast -Wwrite-strings -Wsign-compare
 -Waggregate-return -Wmissing-declarations -Wformat -Wmissing-format-attribute
 -Wno-deprecated-declarations -Wpacked -Wredundant-decls -Wnested-externs -Wlong-long
 -Wunreachable-code -Wcast-align --param max-inline-insns-single=500
 -ffast-math -mlong-calls)

set(LINKER_FILE "${CMAKE_CURRENT_LIST_DIR}/src/ASF/sam/utils/linker_scripts/samg/samg55j19/gcc/flash_usb_bootloader.ld")

add_compile_options(${CPU_FLAGS} ${COMPILER_FLAGS})
add_link_options(${CPU_FLAGS})
add_definitions(-D__SAMG55G19__ -DARM_MATH_CM4=true -Dprintf=iprintf -D__FREERTOS__ -Dscanf=iscanf -DBOARD=USER_EXT_BOARD -DUDD_ENABLE -DNOTBOARD=SAMG55_XPLAINED_PRO -DUSER_BOARD_REVISION=4)

include(utils.cmake)

if("${CMAKE_C_COMPILER_ID}" STREQUAL "Clang")
    include(../../../clang_utils.cmake)
    clang_utils_get_arm_gcc_sysroot(${ARM_GCC_C_COMPILER} ${CPU_FLAGS})
    clang_utils_get_arm_gcc_multilib_dir(${ARM_GCC_C_COMPILER} ${CPU_FLAGS})
    clang_utils_get_arm_gcc_lib_dir(${ARM_GCC_C_COMPILER} ${CPU_FLAGS})
    clang_utils_get_arm_gcc_crt(${ARM_GCC_SYSROOT} ${ARM_GCC_MULTIDIR} ${ARM_GCC_LIBGCC_DIR})
    string(APPEND CMAKE_EXE_LINKER_FLAGS
        " -nostdlib -L${ARM_GCC_SYSROOT}/lib/${ARM_GCC_MULTIDIR} -L${ARM_GCC_LIBGCC_DIR}")
    string(APPEND CMAKE_EXE_LINKER_FLAGS " -lgcc -lc_nano -lc")
elseif("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
    string(REGEX MATCH ".*\.specs.*" has_specs "${CMAKE_EXE_LINKER_FLAGS}")

    if(NOT has_specs)
        string(APPEND CMAKE_EXE_LINKER_FLAGS " --specs=nano.specs")
    endif()
endif()

string(REPLACE ";" " " _LINKER_CPU_FLAGS "${CPU_FLAGS}")

# subdirlist(include_dir_list ${CMAKE_CURRENT_LIST_DIR}/src)

add_executable(beyond_synaptics src/main.c)
target_include_directories(beyond_synaptics PRIVATE
src/
# Project source dirs must precede the ASF/CMSIS dirs: the samg55 CMSIS tree
# ships its own component/instance "adc.h" which otherwise shadows the
# project's src/Drivers/adc.h on a bare #include "adc.h".
src/Devices/
src/Drivers/
src/config/
src/crash_handler/
src/ASF/
src/ASF/common/
src/ASF/common/boards/
src/ASF/common/services/
src/ASF/common/services/clock/
src/ASF/common/services/clock/samg/
src/ASF/common/services/ioport/
src/ASF/common/services/ioport/sam/
src/ASF/common/services/serial/
src/ASF/common/services/serial/sam_uart/
src/ASF/common/services/sleepmgr/
src/ASF/common/services/sleepmgr/sam/
src/ASF/common/services/usb/
src/ASF/common/services/usb/class/
src/ASF/common/services/usb/class/audio/device
src/ASF/common/services/usb/class/audio
src/ASF/common/services/usb/class/hid
src/ASF/common/services/usb/class/hid/device
src/ASF/common/services/usb/class/composite
src/ASF/common/services/usb/class/hid/device/generic
src/ASF/common/services/usb/udc/
src/ASF/common/utils/
src/ASF/common/utils/interrupt/
src/ASF/common/utils/stdio/
src/ASF/common/utils/stdio/stdio_serial/
src/ASF/sam/
src/ASF/sam/boards/
src/ASF/sam/boards/displayboard
src/ASF/sam/boards/samg55_xplained_pro/
src/ASF/sam/drivers/
src/ASF/sam/drivers/adc/
src/ASF/sam/drivers/efc/
src/ASF/sam/drivers/flexcom/
src/ASF/sam/drivers/matrix/
src/ASF/sam/drivers/pdc/
src/ASF/sam/drivers/pdc/pdc_uart_example/
src/ASF/sam/drivers/pdm/
src/ASF/sam/drivers/pio/
src/ASF/sam/drivers/pmc/
src/ASF/sam/drivers/supc/
src/ASF/sam/drivers/udp/
src/ASF/sam/drivers/usart/
src/ASF/sam/utils/
src/ASF/sam/utils/cmsis/
src/ASF/sam/utils/cmsis/samg/
src/ASF/sam/utils/cmsis/samg/samg55/
src/ASF/sam/utils/cmsis/samg/samg55/include/
src/ASF/sam/utils/cmsis/samg/samg55/include/component/
src/ASF/sam/utils/cmsis/samg/samg55/include/instance/
src/ASF/sam/utils/cmsis/samg/samg55/include/pio/
src/ASF/sam/utils/cmsis/samg/samg55/source/
src/ASF/sam/utils/cmsis/samg/samg55/source/templates/
src/ASF/sam/utils/cmsis/samg/samg55/source/templates/gcc/
src/ASF/sam/utils/fpu/
src/ASF/sam/utils/header_files/
src/ASF/sam/utils/linker_scripts/
src/ASF/sam/utils/linker_scripts/samg/
src/ASF/sam/utils/linker_scripts/samg/samg55j19/
src/ASF/sam/utils/linker_scripts/samg/samg55j19/gcc/
src/ASF/sam/utils/make/
src/ASF/sam/utils/preprocessor/
src/ASF/sam/utils/syscalls/
src/ASF/sam/utils/syscalls/gcc/
src/ASF/thirdparty/
src/ASF/thirdparty/CMSIS/
src/ASF/thirdparty/CMSIS/Include/
src/ASF/thirdparty/CMSIS/Lib/
src/ASF/thirdparty/CMSIS/Lib/GCC/
src/ASF/thirdparty/freertos/
src/ASF/thirdparty/freertos/freertos-10.0.0/
src/ASF/thirdparty/freertos/freertos-10.0.0/Source/
src/ASF/thirdparty/freertos/freertos-10.0.0/Source/include/
src/ASF/thirdparty/freertos/freertos-10.0.0/Source/portable/
src/ASF/thirdparty/freertos/freertos-10.0.0/Source/portable/GCC/
src/ASF/thirdparty/freertos/freertos-10.0.0/Source/portable/GCC/ARM_CM4F/
src/ASF/thirdparty/freertos/freertos-10.0.0/Source/portable/MemMang/
src/config/
src/Devices
src/Drivers
src/crash_handler
)

target_sources(beyond_synaptics PRIVATE
src/ASF/common/services/usb/class/audio/device/udi_audio.c
src/ASF/common/services/usb/class/hid/device/udi_hid_desc.c
src/ASF/sam/boards/displayboard/displayboard_init.c
src/ASF/sam/drivers/adc/adc2.c
src/crash_handler/crash_handler.c
src/Devices/eyetrack_fpga.c
src/Devices/fan_motor_control.c
src/Devices/linkbox_hpd.c
src/Devices/oled_control.c
src/Devices/prox_control.c
src/Devices/prox_tmd2635.c
src/Devices/rgb_led.c
src/Devices/usb2517.c
src/Devices/usb3803.c
src/Devices/usbc_mux.c
src/Devices/vxr_interface.c
src/Devices/tundra_uart.c
src/Drivers/adc.c
src/Drivers/flash_mutex.c
src/Drivers/i2c.c
src/Drivers/pdm_mics.c
src/Drivers/power_control.c
src/Drivers/rtt_util.c
src/Drivers/signature.c
src/Drivers/temp_sense.c
src/eeprom_emulation.c
src/hw_test.c
src/sw_ver.c
src/ui_interface.c
src/usart_interface.c
src/usbhid_interface.c
src/video_proc.c
src/test_and_debug.c
src/ASF/common/services/usb/class/composite/udi_composite_desc.c
src/ASF/common/services/usb/class/hid/device/generic/udi_hid_generic.c
src/ASF/common/services/usb/class/hid/device/udi_hid.c
src/ASF/common/services/usb/udc/udc.c
src/ASF/sam/drivers/pio/pio_handler.c
src/ASF/sam/drivers/udp/udp_device.c
src/ASF/sam/drivers/matrix/matrix.c
src/ASF/sam/drivers/pdc/pdc.c
src/ASF/sam/drivers/pdm/pdm.c
src/ASF/sam/drivers/pio/pio.c
src/ASF/common/services/clock/samg/sysclk.c
src/ASF/common/services/serial/usart_serial.c
src/ASF/common/services/sleepmgr/sam/sleepmgr.c
src/ASF/common/utils/interrupt/interrupt_sam_nvic.c
src/ASF/common/utils/stdio/read.c
src/ASF/common/utils/stdio/write.c
src/ASF/sam/drivers/efc/efc.c
src/ASF/sam/drivers/flexcom/flexcom.c
src/ASF/sam/drivers/pmc/pmc.c
src/ASF/sam/drivers/pmc/sleep.c
src/ASF/sam/drivers/supc/supc.c
src/ASF/sam/drivers/usart/usart.c
src/ASF/sam/utils/cmsis/samg/samg55/source/templates/gcc/startup_samg55.c
src/ASF/sam/utils/cmsis/samg/samg55/source/templates/system_samg55.c
src/ASF/sam/utils/syscalls/gcc/syscalls.c
src/ASF/thirdparty/freertos/freertos-10.0.0/Source/croutine.c
src/ASF/thirdparty/freertos/freertos-10.0.0/Source/event_groups.c
src/ASF/thirdparty/freertos/freertos-10.0.0/Source/list.c
src/ASF/thirdparty/freertos/freertos-10.0.0/Source/portable/GCC/ARM_CM4F/port.c
src/ASF/thirdparty/freertos/freertos-10.0.0/Source/portable/MemMang/heap_3.c
src/ASF/thirdparty/freertos/freertos-10.0.0/Source/queue.c
src/ASF/thirdparty/freertos/freertos-10.0.0/Source/stream_buffer.c
src/ASF/thirdparty/freertos/freertos-10.0.0/Source/tasks.c
src/ASF/thirdparty/freertos/freertos-10.0.0/Source/timers.c
)

target_link_directories(beyond_synaptics PRIVATE src/ASF/thirdparty/CMSIS/Lib/GCC)
target_link_libraries(beyond_synaptics PRIVATE arm_cortexM4lf_math m)

target_link_options(beyond_synaptics PRIVATE -Wl,--gc-sections -Wl,-T ${LINKER_FILE})

firmware_size(beyond_synaptics sysv)
generate_object(beyond_synaptics .bin binary)

if ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
     generate_object(beyond_synaptics .hex ihex)
endif()

- -Wunreachable-code -Wcast-align --param max-inline-insns-single=500

+ -Wunreachable-code -Wcast-align --param max-inline-insns-single=500)

+# NOTE: -mlong-calls REMOVED (0.4.4) — it wedged the MCU under SteamVR addon

+# load (BeyondEyetracking/BeyondSteamVR co-driving 0101); hardware-isolated as

+# the sole cause. -ffast-math also removed (unsafe FP / -ffinite-math-only kills

+# NaN guards; its crtfastmath FPSCR init was gc-sections'd out anyway). The

+# official Studio .cproj uses neither flag.