Unnamed repository; edit this file 'description' to name the repository. http://cgit.235523.xyz/tinyusb.git/atom/src/common?h=claude%2Fadd-systemview-debug 2026-09-03T23:06:25Z 2026-09-03T23:06:25Z hathach thach@tinyusb.org 2026-09-03T23:06:25Z urn:sha1:633e074a0b9effbfbb84c93695e52fb75009564c - kill_traffic(): stop the recording at --duration-ms exactly, then reap the workload, instead of waiting on it (up to 60s) before -stop - sysview_report.py: key open_calls by (func id, context) so interleaved callers of the same function don't cross-pair CALL/RET - build.yml: intersect the sysview dep-fetch board list with the PR's own HIL selection (tinyusb.json vs hfp.json), and skip entirely when HIL is not running for this PR - nrf54h20dk: shrink SYSVIEW_BUFFER_SIZE_DEFAULT to 4096 -- .data/.bss sit in the 32 KiB primary RAM, so the family's 65536 default fails to link - tusb_sysview.c: copy pcTaskName into a local buffer at snapshot time so a task deleted mid-lap can't leave SendTaskInfo() dereferencing a freed TCB - sysview_ci.py: drop a comparison against a baseline whose capture config (example/workload/duration_s) changed, and fail cdc_burst when the link stays enumerated but echoes nothing back - SKILL.md: document the WCH post-mortem dump path (OpenOCD, no J-Link) 2026-09-03T21:21:57Z hathach thach@tinyusb.org 2026-09-03T10:14:28Z urn:sha1:5a0d707dd96ae7821d97793b441b86aabb684855 Cortex-M0/M0+, the WCH RISC-V parts and MAX3266x have no usable DWT cycle counter, so their family.c provides SEGGER_SYSVIEW_X_GetTimestamp() from a free-running hardware timer: a 32-bit general-purpose timer on ST parts (sysview_stm32_tim2.h), SysTick-extended sources on the M0 families, the core's SysTick-equivalent on WCH with the documented ordered read of the split count registers (sysview_wch_timestamp.h), and a TMR on MAX3266x (sysview_max32_tmr.h). max32666fthr's DWT implements only watchpoint comparators (DWT_CTRL.NOCYCCNT=1 read live; UG6971 documents no DWT/trace at all), so SystemView's ARMv7-M default read 0xE0001004 as a frozen 0 and every duration decoded as zero. The TMR runs at 48 MHz (f_PCLK = f_SYS_CLK/2; Continuous mode, CMP=0xFFFFFFFF, prescaler 1 - UG6971 15.2 guarantees TMRn_CNT readable while counting); TMR0 by default - present on every MAX32 part, unused by the examples, FreeRTOS ticks on SysTick - overridable with -DSYSVIEW_MAX32_TMR=n. The family builds SystemView with SEGGER_SYSVIEW_CORE_OTHER and sets CFG_TUSB_SYSVIEW_TIMESTAMP_BSP, a tusb_sysview.c opt-in for ARMv7-M parts without CYCCNT where the BSP also reports the rate via SEGGER_SYSVIEW_X_GetTimestampFreq(); the fixed-1MHz microsecond contract is unreachable on a powers-of-two-only prescaler. SEGGER_SYSVIEW_X_GetInterruptId() gains the ICSR.VECTACTIVE read for CORE_OTHER builds. MAX32650/32690 use different GCR clock-gate names and stay unported. Measured on the rig: seven host-timed 1.000 s gaps at 1.00044-1.00091 (median +0.05%). stm32f0 refuses to configure SYSVIEW for stm32f070xb at CMake time: that variant has no TIM2 at all, and the alternative was an undefined-reference link error with no hint. The shared hw/bsp/sysview_*.h join ci_select rule 16's hw/bsp file list (cross-family build files, compiled only under -DSYSVIEW which no CI leg enables), mirrored in the spec's rule table, so master's classification guard resolves them on both axes. 2026-09-03T21:21:57Z hathach thach@tinyusb.org 2026-08-11T10:07:23Z urn:sha1:3baa7c8fbafd2cbccc5810626ebbfaa50c0ea4da Level 2 marks the stack's task-side entry points (tud_task/tuh_task inner loop, usbd_edpt_xfer, control transfers); level 3 adds the class drivers (cdc, msc) and the rp2040 dcd/hcd as the reference portable layer. All call sites compile away below their level. 2026-09-03T21:21:57Z hathach thach@tinyusb.org 2026-08-11T10:07:06Z urn:sha1:4158178230ec491c7eef03df6bbbd8c46811805c tusb_sysview.{c,h} carry the SystemView glue: the TU_SV_* event/function-name table (offset TU_SV_EVENT_BASE 512), module registration, the leveled CFG_TUD_SYSVIEW/CFG_TUH_SYSVIEW gates (1 = ISR only, 2 = +stack call sites, 3 = +class drivers), per-task stack high-water reporting with a cached snapshot refreshed once per rotation, and the dual-role guard that collapses double-recording when device and host share one vector. ISR exit emits RecordExitISRToScheduler() when SCB->ICSR.PENDSVSET is set at exit (Cortex-M0/M3+), so FreeRTOS captures don't show a causeless task switch after every USB ISR; RISC-V keeps the plain exit record. Unit-tested under ceedling against a fake SEGGER_SYSVIEW.h vendor header. 2026-09-01T08:42:39Z Zixun LI admin@hifiphile.com 2026-09-01T08:42:39Z urn:sha1:f4697a0626ffa81617c457c93b64e3c3816c1af0 bound endpoint number in tu_bind_driver_to_ep_itf 2026-08-18T15:07:49Z hathach thach@tinyusb.org 2026-08-16T18:02:54Z urn:sha1:19ff2ed615e4a97984aab5551ac8835ead53b9e7 ERR050101: while an isochronous IN endpoint is active, an IN token addressed to that same endpoint number on ANOTHER device sharing the host can silently unprime one of this device's OUT endpoints - control, bulk, interrupt or isochronous alike. NXP states it cannot be detected by software and raises no interrupt, so the endpoint simply stops answering and the transfer never completes. The workaround is a uniqueness requirement rather than a particular number: the isochronous IN endpoint must not share its number with any IN endpoint in use on the bus. One family-wide constant therefore defeats it, since two affected boards on the same hub then pick the same number and each becomes the other's aggressor. CFG_TUSB_MIMXRT1XXX_ERRATA_ERR050101 is set only for the parts whose errata list it - RT1015, RT1020, RT1024 and RT1050, where it is marked no fix scheduled, plus RT1060 and RT1064 rev A - so RT1010 and the RT11xx family keep the ordinary number and cannot collide with an affected board beside them. Several affected boards on one hub can still be given distinct numbers with -DEPNUM_ISO_IN. The guard covers every example that has an isochronous IN endpoint: audio_test, audio_4_channel_mic, uac2_headset, cdc_uac2, usbtest, video_capture and video_capture_2ch. The video examples move the endpoint only when streaming isochronously, since the bulk configuration is unaffected, and video_capture_2ch takes two numbers because it has two streams. The macro name follows CFG_TUSB_RP2_ERRATA_E2/E4/E15 already in tree, and its is fixed, and which cannot be told apart at compile time - a way to define it to 0. device_issues.rst records ERR050101 against every affected part with a link to each errata sheet, and adds the LPC55S2x USB.3 speed-detection and USB.5 isochronous IN entries, neither of which TinyUSB works around. The branch's design notes are included under docs/superpowers. Verified: 340 wedge-free runs on mimxrt1064_evk, which previously wedged within hours, and the macro resolving to endpoint 0x87 on mimxrt1064_evk against 0x83 on mimxrt1010_evk and stm32f407disco. 2026-08-17T15:30:57Z Javid Khan dxbjavid@gmail.com 2026-08-17T15:26:27Z urn:sha1:53567226fce0e7be7e7b5e7a019d0f4d14064c33 2026-07-26T19:16:23Z TenGui cyrus.z.xu@gmail.com 2026-07-26T19:16:23Z urn:sha1:05f19ab438641823d047c811e7426177788d0490 2026-07-23T22:59:12Z TenGui cyrus.z.xu@gmail.com 2026-07-23T22:59:12Z urn:sha1:ff0683d5f827a0db546f026a16abfa48b8dc67e1 2026-07-23T22:58:28Z TenGui cyrus.z.xu@gmail.com 2026-07-23T22:58:28Z urn:sha1:ca198f3dac0b61f3a13bc3319223ed37511e568c