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usb-target-debug/usb-sniffer skills
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From a second max-effort review of the branch:
- Drop the dead TUSB_XFER_ISOCHRONOUS case in dcd_edpt_open: iso endpoints
are armed via dcd_edpt_iso_alloc/activate (TUP_DCD_EDPT_ISO_ALLOC is
defined for this IP), never through dcd_edpt_open, so the case and its
dd->isochronous assignment were unreachable and asserted a false
invariant. Only bulk/interrupt reach the switch now.
- Extend the iso compile gate to the classes that actually arm an iso
endpoint: DCD_ISO_ENABLED now includes CFG_TUD_BTH (bth_device.c opens
an iso voice endpoint). Without it a BTH build would compile the iso
machinery out and fail SET_INTERFACE at runtime.
- Un-skip LPC175X_6X in the usbtest example: it shares dcd_lpc17_40.c with
LPC40XX verbatim, so the "DCD has no isochronous support" skip reason no
longer holds. Build-verified for lpcxpresso1769 (previously blocked by
the skip).
- TU_ATTR_UNUSED on the ep_id_is_iso helper: every caller is under
#if DCD_ISO_ENABLED, so non-iso builds don't reference it and clang's
-Wunused-function (fatal in CI) rejected the build — gcc stays quiet.
Verified with the full lpc17 and lpc40 example sets under arm-clang.
A fifth finding — bounding control_ep_read's PACKET_READY spin with a
timeout — was implemented and REVERTED: a naive 100k-iteration bound fires
on legitimately-slow control reads and intermittently drops the device
(hardware-proven by interleaved A/B testing against the pre-fix binary).
The infinite wait is retained; the read is only reached once out_received/
out_queued signal data is present, so the theoretical IRQ-off hang is not
reachable in practice.
Re-verified on ea4088_quickstart: usbtest 30/30 (repeated) + HIL 14/14.
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Fourth view in the USB debugging toolset (usbmon = host URBs, usb-debug =
host reasoning, usb-target-debug = device firmware, usb-sniffer = what
actually crossed D+/D-). Covers the ataradov/usb-sniffer analyzer:
headless pcapng capture (--speed ls/fs/hs, --fold, --limit self-exit),
Wireshark/tshark analysis recipes, and the wire realities that bite:
downstream broadcast, sniffer self-capture noise, xHCI devnum != wire
address, tap-point-dependent reset visibility (hub choreography anchors),
FS-behind-HS-hub splits. Every recipe hardware-validated on the rig,
including the capture-window floor (a 3 s window provably misses the
enumeration ladder; 3M packets minimum).
Two udev files with distinct audiences, not one:
- examples/device/99-tinyusb-examples.rules (renamed from 99-tinyusb.rules):
the user-facing rules the examples need — cafe VID access, hidraw, the
ModemManager blacklist, a couple of board probes. getting_started.rst,
the webusb_serial README and its source comment point here.
- tools/88-tinyusb.rules: the HIL rig's private probe/analyzer allowlist,
now with the sniffer (6666:6620 + blank FX2LP 04b4:8613). Installed on
the rig only; the usb-sniffer skill references it.
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Complete the khci -> chipidea ci_fs migration that was started for device
(commit d70403f1f "host is not yet"):
- device: switch kinetis_k/kl/k32l (Makefiles + k32l CMake) to dcd_ci_fs.c
- host: add hcd_ci_fs.c (port of hcd_khci.c onto ci_fs_regs_t) and switch all
Kinetis families to it; remove src/portable/nxp/khci entirely
- enable host examples (device_info, cdc_msc_hid) for mcu:KINETIS_K
- README: merge the KL and K32L2 rows into a single "KL, K32L" ci_fs row
hcd_ci_fs.c also fixes two pre-existing host bugs found via HIL on frdm_k64f
(present in the old hcd_khci.c too):
- data toggle was flipped on a NAK in suspend_transfer; a NAK transfers no
data so the toggle must be preserved, else the retried bulk packet is
silently discarded by the device (MSC CBW/CSW hang). See comment in file.
- prepare_packets asserted and dropped a transfer when the single shared BDT
was still owned by an in-flight transfer under concurrent activity; now it
returns busy and resume_transfer defers/retries on the next SOF.
HIL verified on frdm_k64f: device 13/13, host cdc_msc_hid (CDC mount + echo +
MSC mount, through a hub).
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01ExGPLP5eU43LR7o6yYLpNi
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EP0 control-OUT fix (usbtest 14/21, errno 110/-74): usbd queues the
status-stage OUT ZLP of every control read with buffer=NULL, so the ISR's
`if (out_buffer)` check missed it and marked the arriving ZLP as
out_received instead. The stale flag poisoned the next control-OUT with
data: its first chunk "completed" instantly from an empty EP0 buffer and
the host's real DATA NAKed forever. Track queued transfers with an
explicit out_queued flag and void half-finished control state on a new
SETUP.
Isochronous support (UM10562 12.15.6): 5-word DMA descriptors with
per-packet size memory, buflen/present_count in packets, one packet per
FRAME (no DMARSet/EpIntEn involvement), completion at EOT for both
directions. Details that matter:
- the iso machinery (5th DD word + packet-size memory) is compiled only
when an iso-capable class is enabled (CFG_TUD_AUDIO/VIDEO/VENDOR), so
non-iso builds pay nothing: _dcd stays 648 B vs 1032 B with iso
- ISR dispatch keys on the hardware's fixed ep-number/type map
(ep_id_is_iso), never on dd fields that thread mode rebuilds
- iso OUT honors Packet_valid (bit 16) and prefills the hardware
writeback slots with 0, so a missed frame counts as 0 bytes instead of
reading back stale buffer contents as data
- packet count is validated (tu_div_ceil <= ISO_MAX_PACKETS) before the
DD is touched, so an oversized transfer is refused without leaving a
serviceable half-built descriptor armed for the frame engine
- dcd_edpt_iso_alloc and iso_activate both enforce the fixed iso endpoint
numbers (3/6/9/12); classes ignore alloc's return value, so activate
must not trust it
Un-skip LPC40XX in the usbtest example; tier 4 now enumerates and passes
iso cases 15/16/22/23. cdc_msc_throughput and printer_to_cdc had bulk on
iso-only EP3 (SET_CONFIGURATION failed with -32); add the LPC17/40 EPNUM
block (bulk on EP2/EP5) like other fixed-EP examples.
Verified on ea4088_quickstart: usbtest tier-4 battery 30/30 repeatedly
and the full device HIL suite 14/14 (incl. audio_test iso).
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Pool/config:
- record real uids (ra8m1_ek), enable usbtest for espressif s3/p4, then
park ra6m5_ek and ra8m1_ek in boards-skip (ra6m5's usbtest/MSC traffic
can kill the uPD720201 host on its ROM firmware; ra8m1 USBHS bring-up
pending); max32666/nrf54lm20 stay enabled - their MosChip flakiness
never wedges
- re-enable device/usbtest on HS boards (mimxrt1064, ch32v307) now that
uPD720201 firmware 2.0.2.6 fixes the command-ring death; mimxrt1015
stays skipped - its HS battery killed the controller on both ROM and
2.0.2.6 firmware (board-specific); match the moved host-test bundles
(f723 <-> rt1064); skip never-passing tests on the new
nrf5340dk/nrf54lm20dk boards and the detached pico host bundle, each
documented with a comment
Host-controller quirk gating in usbtest.py (auto-skip, self-heals on a
healthy xHCI):
- MosChip MCS9990 EHCI: case 25 (int-OUT never scheduled, FRINDEX bug)
and case 11 (unlinked reads complete short/EREMOTEIO)
- Renesas uPD720201 xHCI: firmware-gated. The card must run firmware
>= 2.0.2.6 (RAM-uploaded - it reverts to ROM on every power cycle):
on older firmware the command ring dies under unlink stress (a
Configure Endpoint command stops completing; the hub worker deadlocks
holding the device lock; only a host power cycle recovers; three
boards reproduced it). usbtest.py reads the FW version register (PCI
config 0x6c) and refuses to run at all on older firmware - hil_test
surfaces that as a failed test with the reason. On current firmware
the full 30-case battery runs (validated FS+HS: metro_m4, f723,
f723-DMA all 30/30).
Scheduling (hil_test.py):
- Shuffle each (board, variant)'s test order with a seeded RNG
(HIL_SHUFFLE_SEED to replay) so usbtest batteries and flash churn spread
across the timeline instead of convoying on one controller.
- Per-controller usbtest + flash semaphores: HIL_USBTEST_PARALLEL
(default 4) concurrent usbtest batteries and HIL_FLASH_PARALLEL
(default 8) concurrent flashes per host controller. Profiled on
uPD720201 firmware 2.0.2.6 across 8/1..12/8: wall time falls
22.2/14.3/12.5/10.8 min at usbtest width 1/2/3/4 and plateaus there;
zero controller errors everywhere; first battery case failures
(leaf-hub bandwidth stretch) appear at 12/8, and flash width 12 only
amplifies flasher-hub contention flakes - so 8/4 is the optimum. A
separate battery-window flash throttle was profiled and dropped.
- Give every example a unique hardcoded USB PID (0x4001-0x4022, usbtest
keeps 0x4010) instead of the PID_MAP interface bitmap: different
examples now always re-enumerate back-to-back, even on boards whose
CPU reset does not drop D+ (WCH CH58x), so the EXAMPLE_PID table and
same-PID adjacency reordering in hil_test.py are gone; only the
variant-boundary same-example repeat needs a swap.
- Report matrix: stable columns with the metric-bearing tests pinned
first (usbtest, cdc_msc_throughput, msc_file_explorer[_freertos]),
the rest alphabetical.
Fail fast:
- enum wait budget 8 s on the first attempt, 4 s on retries; dfu waits
are deadline-based so dfu-util's own runtime counts against the
budget.
A device-absent failure now costs ~3-5x a passing test (20-30 s)
instead of 10-30x (47-150 s).
- CI runs hil_test with --retry 1 and no in-run second pass: a broken
fixture fails the job fast instead of holding the self-hosted runner
for hours and blocking other PRs' HIL jobs. hil_test still writes the
.skip sidecar, so a manual re-run attempt only retests what failed.
Review fixes (multi-agent adversarial review of this commit):
- tinyusb_win_usbser.inf: the PID rework moved five CDC examples onto
even PIDs the INF's odd-only DeviceList never matched (legacy-Windows
usbser binding) - appended 0x4006/4008/400a/4020/4022 to both lists.
- usbtest example: USBTEST_TIER is now overridable and the descriptors
and pumps are tier-conditional, so a board whose DCD cannot serve a
tier lowers it instead of skipping the whole example - RA2A1 (RUSB2
with no isochronous pipe) builds at tier 3 via its BOARD_ define; the
host battery follows the tier advertised in bcdDevice. Tier-4 output
verified byte-identical after the refactor.
- dynamic_configuration's second config derived USB_PID + 11 = 0x4018,
colliding with net_lwip_webserver - now USB_PID + 0x0100, outside the
per-example space. tools/check_example_pids.py (pre-commit hook)
enforces PID uniqueness incl. derived and literal idProduct values.
- usbtest.py firmware gate: matched by device ID (uPD720201/720202,
both use the 0x6c FW register), and an unreadable version (setpci
missing/denied) now refuses with its own message instead of
masquerading as "firmware 0x00000000"; noted the gate is necessary
but not sufficient (board-specific kills stay per-board skips).
- hil_test: deadline waits use time.monotonic(); multiprocessing
context pinned to fork (raw semaphores in Pool initargs); flash and
usbtest permits unified into one fail-closed, exception-safe
ctrl_permit (unknown controller takes every slot and logs a warning
instead of silently borrowing slot 0); an all-skipped battery
reports as skip, not "0/0" failure; slow-body polls (mtp, printer,
disk read) go through a shared deadline-based wait_until so their
bodies count against the enum budget; throughput's FS detection
compares serials case-insensitively like every other walk; a missing
MSC read-speed line now fails the host msc_file_explorer test
instead of passing with an empty metric.
Hardening:
- fail fast (15 s) when a driver-registry sysfs write blocks: a wedged
device otherwise turns every subsequent battery into an unkillable
D-state writer and silently hangs the whole run
- usb-recover skill: a VM reboot is not a reliable cure (MosChip hubs
latch up across the PCIe reset); full host power cycle is
Co-Authored-By: Claude Fable 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01HeF2gZ1M7GWkz6Av4BpKPg
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- EP0 OUT: park a back-to-back data-stage packet the DCP accepted before
PID could go NAK and deliver it into the next armed chunk; flow-control
the single-buffer control pipe between chunks (usbtest ctrl_out
corruption); discard a packet parked while an OUT pipe was halted so
BOT reset recovery's fresh CBW read can't receive stale WRITE data
- HS UTMI PHY power-up per the FSP sequence, shared by dcd/hcd: CLKSEL
programmed from the board XTAL (EK-RA8M1 runs 20 MHz; the 24 MHz reset
default never locks) while DIRPD holds the PHY down, then timed release
- hw/bsp(ra8m1_ek): fix U60CK divider macro - BSP_CFG_U60CK_DIV used the
generic USB_CLOCK_DIV_8 encoding (7), which USB60CKDIVCR rejects,
leaving the USBHS link domain at 480 MHz; the USB60-specific
BSP_CLOCKS_USB60_CLOCK_DIV_8 (4) sticks and yields the required 60 MHz
from PLL1P
- support FS-only builds on the high-speed port: gate SYSCFG.HSE on
TUD_OPT_HIGH_SPEED (RHPORT_DEVICE_SPEED=OPT_MODE_FULL_SPEED was a
silent no-op) and always compile both hwfifo access widths - the FIFO
width belongs to the module, not the link speed (FS builds corrupted
odd-length tails: 16-bit access against MBW-32)
- iso activate: reset stale pipe bookkeeping so a BRDY firing before the
class re-arms can't replay a pre-SET_INTERFACE transfer; write PIPEBUF
after PIPESEL selects the pipe (PIPESEL-windowed register)
- clear-halt: re-assert BUF on a still-armed OUT pipe (usbtest case 29)
- bound the D0FIFO ready spin so an undrained double-buffered IN pipe
can't freeze the stack with the IRQ masked
- usbtest example: cap interrupt mps at 64 on RUSB2 high speed (pipes
6-9 have a fixed 64-byte buffer, RA6M5 UM 29.1)
Verified: usbtest 30/30 on ra6m5_ek (HS), ra4m1_ek (FS) and ra8m1_ek
(FS-forced build on the HS port).
Co-Authored-By: Claude Fable 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01HeF2gZ1M7GWkz6Av4BpKPg
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Gadget-Zero style source/sink on a vendor interface (alt0 empty, alt1
bulk+int+iso) plus EP0 ctrl_out; tier advertised in bcdDevice.
Co-Authored-By: Claude Fable 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01HeF2gZ1M7GWkz6Av4BpKPg
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feat(midi2): derive function blocks from the GTB descriptor
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Signed-off-by: HiFiPhile <[email protected]>
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Corrects VIDEO_STACK_SZIE to VIDEO_STACK_SIZE.
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- Order CFG_TUH_DEVICE_MAX before CFG_TUH_HID in the host config snippets
(cdc_msc_hid, hid_controller) so the documented snippet has no forward
macro reference when copied into tusb_config.h.
- Fix stale `examples.rst` references: the generator now writes per-group
`docs/examples/<group>/index.rst` pages, so update the conf.py comment and
the build-doc SKILL.md accordingly.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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Documentation tooling:
- Add the `build-doc` skill and `tools/build_doc.py` wrapper for local
Sphinx builds (clean / -W / open).
- Enable Markdown (MyST) in conf.py and auto-collect
examples/{device,host,dual}/*/README.md into a 3-level Examples nav
(Examples > Device/Host/Dual > example), noting each page's source
location and normalizing headings to a single H1.
- Remove the stale `.claude/commands/build-doc.md`; point the AGENTS.md
Documentation section at the skill.
Example docs:
- Add a README.md for every device/host/dual example: what it does, USB
interface table, notable tusb_config.h settings, generic CMake + Make
build steps, and how to try it.
- Fold each *_freertos variant into its base README, noting the FreeRTOS
source path and any RTOS-specific behavior.
Generated docs/examples/ output is git-ignored. Builds clean with
`sphinx-build -W`.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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Adds two Group Terminal Blocks (output and input) with names and
per-direction endpoint association, plus an explicit endpoint name.
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Signed-off-by: HiFiPhile <[email protected]>
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Signed-off-by: HiFiPhile <[email protected]>
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Signed-off-by: HiFiPhile <[email protected]>
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Signed-off-by: HiFiPhile <[email protected]>
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The BSP family and MCU option were named "ch58x"/"CH58X", but the supported part is
the CH583/CH582 (and the SDK repo is openwch/ch583); CH585 is a separate MCU family,
so the CH58x umbrella was misleading. Rename to the specific family:
- hw/bsp/ch58x -> hw/bsp/ch583 (dir), and the BSP-local files ch58x_it.* ->
ch583_it.*, system_ch58x.* -> system_ch583.* (include guards/refs updated). The
vendor SDK files (CH58x_common.h, CH58x_*.c in hw/mcu/wch/ch583) keep their names.
- OPT_MCU_CH58X -> OPT_MCU_CH583 in tusb_option.h, tusb_mcu.h, and the shared WCH
USBFS driver (ch32_usbfs_reg.h, dcd_ch32_usbfs.c). OPT_MCU_CH582 is kept as an
alias (same value), so either name selects the same code.
- FAMILY_MCUS CH58X -> CH583, CFG_TUSB_MCU=OPT_MCU_CH583, mcu:CH58X -> mcu:CH583 in
the example skip lists, the CI build matrix (ci_set_matrix.py), the get_deps family
tag, and docs/reference/boards.rst.
Board names (ch582m_evt, yd-ch582m) are unchanged. Verified: make + cmake build for
ch582m_evt, and ci.lan HIL (all device examples pass).
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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CH58x has no isochronous support (dcd_edpt_iso_alloc() returns false), but the
audio class ignores that result and the endpoints fall back to capped 64-byte
non-iso transfers, producing non-functional audio firmware. video_capture and the
FreeRTOS audio examples already carry mcu:CH58X; add it to the remaining iso
examples (audio_test, audio_4_channel_mic, audio_test_multi_rate, cdc_uac2,
uac2_headset, uac2_speaker_fb) so they are not built for CH58x.
Found by Codex review. Verified via build_utils.skip_example() that all six now
skip on ch582m_evt while control examples (e.g. cdc_msc) still build.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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Fix one direction endpoint examples
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fix: BE bitfield guards for audio structs and endian-safe wValue/wIndex extraction in UAC2 examples
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Enabling the audio test fleet-wide surfaced failures on esp32-p4/s3 and
metro_m4_express: the UAC mic enumerates but arecord fails the iso IN read
with EIO, while 18 other boards pass strict=1.000.
esp32: root cause is the FreeRTOS tick rate. ESP-IDF defaults
CONFIG_FREERTOS_HZ to 100, so the audio task wakes only every 10 ms and
can't service the 1 ms UAC iso frames -> underrun -> arecord EIO. (The same
dwc2 driver passes on STM32, whose FreeRTOSConfig is 1000 Hz.) Set
CONFIG_FREERTOS_HZ=1000 in the example sdkconfig.defaults; the example
defaults are honored in the generated sdkconfig alongside the BSP's, so this
takes effect.
metro_m4_express (samd51): not tick-rate -- its FreeRTOSConfig is already
1000 Hz like the passing boards -- so it's a separate iso-IN issue, skipped
for now.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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The audio20 get/set entity dispatchers already extract entity_id from
wIndex and route to the matching clock / feature-unit helper, so each
helper's own entity_id re-derivation and TU_ASSERT(entity_id == ...) was
dead: the helper is only ever reached for its one entity. Unknown
entities are still rejected by the dispatcher's "not handled" path.
Remove the redundant local, the dead assert, and the constant "entity"
field from each helper's not-supported log (the message text already
identifies the entity). The local is dropped entirely rather than kept
for the log, since TU_LOG1 compiles out in release and would leave it
unused.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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# Conflicts:
# README.rst
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* test/hil: replace build.flags_on with named variant schema
Boards declare build variants as `variant: [{name, flags}]` instead of
`build.flags_on`. The variant `name` is the build dir (cmake-build-<name>) and
the HIL report row; `flags` is the raw CFLAGS string (-D...=1) injected via
CFLAGS_CLI. No `variant` => a single build named after the board.
- build.py: --build-name <name> (dir) + --cflag=<token> (raw CFLAGS, repeatable,
=form survives the matrix's shell word-splitting); drop -f1/CFLAGS wrapping.
- hil_ci_set_matrix.py: emit one build arg per variant.
- hil_test.py: iterate variants; report row + build dir = variant name.
- hil_ci.sh: copy all cmake-build-<board>* dirs for -b runs.
- get_deps.py: accept (ignore) --build-name/--cflag from matrix args.
- tinyusb.json: migrate all 6 flags_on boards to variant.
* board_test: park CI build with busy spin instead of wfe
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hil: park boards with idle board_test instead of erasing flash
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Add control transfer fifo for host stack
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- src/tusb.c: extend tu_str_xfer_result[] with "ABORTED" and "INVALID"
to match the new enum size. Not reachable today (no HCD posts those
values through hcd_event_xfer_complete), but keeps the enum/table
invariant intact so future HCDs that surface ABORTED don't index OOB.
- examples/dual/dynamic_switch/src/main.c: apply the same while(1)
hoist already done for cdc_task / print_devinfo_task to
led_blinking_task. On OS_NONE the loop returned mid-iteration, which
on first call could fire multiple back-to-back toggles while
start_ms (initially 0) caught up to uptime.
Co-Authored-By: Claude Opus 4.7 <[email protected]>
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Signed-off-by: HiFiPhile <[email protected]>
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Sonar flagged the loop body as executing only once on OS_NONE because
the OS_NONE branch returns inside the first iteration (main() drives
the task again). Make the while(1) conditional on RTOS so the OS_NONE
build is a straight-line function with no misleading loop.
Co-Authored-By: Claude Opus 4.7 <[email protected]>
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The variable is set in mount/umount callbacks but not read elsewhere
in the example (rx_cb already receives idx as a parameter). IAR
treats Pe550 as an error under --warnings_are_errors. Tag it
TU_ATTR_UNUSED so the example still shows the pattern of tracking
the device index without erroring on unused-set.
Co-Authored-By: Claude Opus 4.7 <[email protected]>
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Same fix as midi2_device — IAR rejects the unreachable statement
after the while(1) superloop. Let int main fall off the end.
Co-Authored-By: Claude Opus 4.7 <[email protected]>
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- examples/device/midi2_device/src/main.c: drop the unreachable
`return 0;` after the `while(1)` superloop. IAR with
--warnings_are_errors rejects Pe111 (statement is unreachable);
C99 lets `int main` fall off the end, matching midi_test.
- examples/host/msc_file_explorer_freertos/skip.txt: skip
stm32h7s3nucleo. The board has only 64 KB on-chip FLASH and the
FreeRTOS + FatFS host MSC explorer now overflows by ~248 bytes
after the async control queue refactor.
Co-Authored-By: Claude Opus 4.7 <[email protected]>
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iccarm rejects -Wno-type-limits, breaking the hil-hfp-iar CI matrix
(stm32l412nucleo, stm32f746disco, lpcxpresso43s67). Apply the same
CMAKE_C_COMPILER_ID guard used in hw/bsp/family_support.cmake so IAR
builds skip the flag without losing the GCC warning suppression.
Co-Authored-By: Claude Opus 4.7 <[email protected]>
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checks
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task is blocking
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Co-authored-by: HiFiPhile <[email protected]>
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Signed-off-by: HiFiPhile <[email protected]>
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Signed-off-by: HiFiPhile <[email protected]>
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Signed-off-by: HiFiPhile <[email protected]>
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