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| author | hathach <[email protected]> | 2026-07-23 14:18:40 +0700 |
|---|---|---|
| committer | hathach <[email protected]> | 2026-07-24 14:55:59 +0700 |
| commit | b97f5dae5ba63015125595624e90e924b0b6d31b (patch) | |
| tree | 491cd1ed74117e56fb8ffa5ff4b582ccc3b7ac3b /docs | |
| parent | 9c6c0390a0b163c8ea64145f759118795c45b47f (diff) | |
docs(target-debug): DWT data trace (verified both probe families); reorder to table; SWO enable chain
- DWT data trace: FUNCTION 0b0011 (ARMv7-M ARM Table C1-21) streams value +
accessor-PC packets per access, no halt, no code. Verified on
stm32f407disco (J-Link SWORead: 451 KB, value = uptime ms, PC =
tusb_time_millis_api) and stm32h743nucleo (OpenOCD/ST-Link tpiu capture:
607 KB, same decode). Caveat recorded: R/W-only trace floods on polled
variables.
- SWO enable chain documented: tools own TRCENA/ITM/TPIU; vendor part bites
— H7 needs DBGMCU trace clocks, PB3 manually muxed to AF0, native
stlink-dap (hla tpiu silently no-ops), the cfg's stm32h7x.swo object (the
.tpiu object is the parallel port), traceclk = c_ck 400 MHz (wrong guesses:
ratio-garbage or silence).
- Sections reordered to match the intrusiveness table (least->most
intrusive); cross-references fixed; table gains the data-trace row.
Diffstat (limited to 'docs')
0 files changed, 0 insertions, 0 deletions