tinyusb.git/hw/bsp/lpc11, branch claude/add-systemview-debug

sysview: take the timestamp from a BSP hardware timer where the core has no DWT

2026-09-03T21:21:57Z

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.

sysview: wire the -DSYSVIEW= build option

2026-09-03T21:21:57Z

family_support.cmake/.mk translate -DSYSVIEW= (CMake) / SYSVIEW= (Make) into CFG_TUD_SYSVIEW/CFG_TUH_SYSVIEW, pull in lib/SystemView sources and the RTT/SystemView include paths, and refuse levels the family cannot honour. The lpc11/13/15/17/40/43 families declare SYSVIEW_RAM_BASE_DEFAULT 0x10000000: their SRAM does not start at the Cortex-M-canonical 0x20000000, and the recorder needs the real base to find the RTT control block.

bsp(lpc11u37): move the main stack to the USB SRAM bank

2026-08-18T15:07:49Z

The 8 KB main bank is packed tightly enough that only ~280 bytes remained above .bss, and interrupt frames overflowed into the topmost task stack - a hard fault in cdc_msc_freertos. Put the MSP at the top of the 2 KB USB SRAM bank, which nothing else uses in either build system, so the stack no longer shrinks as .bss grows. The Make build's CFG_TUSB_MEM_SECTION placement of endpoint buffers into that bank is dropped so both build systems agree on the layout. The headroom assert is written as an addition rather than a subtraction, since linker script arithmetic is unsigned and an overflowing bank would underflow the difference into a huge positive value and pass silently.

remove IAR toolchain support from make build system

2026-04-06T04:17:34Z

IAR is only supported with CMake. Remove all IAR-specific references from the Make build system including toolchain files, SRC_S_IAR, LD_FILE_IAR variables, and IAR toolchain detection. Also fix GET_SECTOR_COUNT truncation in msc_file_explorer and broken formatting in stm32f7 board_uart_write. Co-Authored-By: Claude Opus 4.6 (1M context)

make board_uart_read()/write() return -1 when unimplemented for consistency across all families

2026-04-04T14:32:39Z

replace board_millis() with tusb_time_millis_api()

2026-02-27T17:01:40Z

bsp: Disable SysTick ISR if FreeRTOS is enabled

2025-11-25T15:30:32Z

force clang asm with -x assembler-with-cpp

2025-10-23T11:00:15Z

fix more build

2025-10-22T21:05:33Z

refactor family.cmake: rename add_board_target() to family_add_board() and move it to family_configure_common()

2025-10-22T19:23:20Z

also move startup and linker from board target to actual exe