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svf: initial SVF player + svf_play command

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New modules/svf/ plays the single-device SVF subset over the bscan_*
primitives: SIR/SDR with masked TDO compare, RUNTEST (TCK/SEC), STATE
(RESET/IDLE), ENDIR/ENDDR (IDLE only), HIR/HDR/TIR/TDR (length 0), TRST,
FREQUENCY. Exposed as `svf_play <file>`. It warms up the FTDI link
first — the MPSSE's first data read after open returns stale FIFO
content, normally hidden because jtag_scan runs before anything.

Also adds the bscan_tap_reset prototype. Validated on the live IGLOO2
M2GL010T: a hand-written IDCODE-check SVF passes (masked compare) and a
deliberately wrong one is caught at the mismatching bit. A generic
program dispatch off the prog tag, multi-device chains and non-IDLE end
states are still TODO.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Foué
2026-05-24 14:36:41 +02:00
parent 37efccaf50
commit c77d86efd0
7 changed files with 541 additions and 0 deletions
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7
modules/svf/CMakeLists.txt Normal file
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set(SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
file(GLOB_RECURSE ALL_SOURCES "*.c")
include_directories(${CMAKE_CURRENT_SOURCE_DIR}/..)
add_library(svf ${ALL_SOURCES})