The TX/TXRX functions used fixed ~1-2 KB stack buffers and rejected
anything larger, so any big shift failed: bscan_idle_cycles(10000) and
above all the ~19 Mbit bitstream load for the BSCAN proxy. Size the
pack/capture buffers to the shift on the heap instead.
This is what unblocked the proxy load — see next commit.
The bscan_jedec command and tutorial referenced the JEDEC ID without
defining it. Describe the 0x9F RDID command and the manufacturer +
device byte layout, in the tutorial and the command help.
bscan_jedec <device> reads the SPI flash JEDEC ID (0x9F + 3 bytes)
through a loaded BSCAN proxy, via bscan_spi_xfer. Validation command for
the proxy path; not yet exercised on hardware.
One CS-framed transaction: marker + 32-bit count + MOSI + read-latency
skip + MISO, MSB-first on the wire, matching OpenOCD's jtagspi so the
quartiq proxy bitstreams work unchanged. Half-duplex (tx,txlen,rx,rxlen)
signature, single-device chain.
NOT yet validated on hardware — protocol follows the OpenOCD reference
but has not been confirmed against a live proxy + flash. Validation
(read JEDEC ID on the KCU105) is the next step.
Drop the get_/set_/_pin/_list noise from the JTAG commands (e.g.
jtag_get_probes_list -> jtag_probes, jtag_set_spi_cs_pin -> jtag_spi_cs,
jtag_spi_rd_wr -> jtag_spi_xfer). jtag_open_probe -> jtag_open (not
jtag_probe, which would clash with jtag_probes under tab-completion).
Hard rename, no aliases. Updates the state-dump emitter, help text,
example script and docs accordingly.
It returned the loaded-BSDL count, which the engine flagged as an error
code ("Command failed with code: 1") whenever a BSDL matched. Stash the
count in last_data_value and return JTAG_CORE_NO_ERROR instead.
jtag_get_probes_list now prints a flat [N] index; jtag_open_probe takes
that index (decimal) or, if 0x-prefixed, the raw probe id. Avoids the
trap of typing "1" and hitting a non-existent (drv 0, probe 1).
DmgrEnumDevices builds an internal device table that must be released
with DmgrFreeDvcEnum, otherwise a second enumeration (e.g. opening a
probe by index, which re-runs Detect) fails.
TMS-only shifts go through DjtgPutTmsBits with TDI held to 0. Pure data
shifts use DjtgPutTdiBits with TMS held to 0. Mixed shifts (e.g. last
bit of Shift-IR/DR with TMS=1) fall back to DjtgPutTmsTdiBits — note
that within each pair the encoding is TDI(low) then TMS(high),
LSB-first, despite the function name (verified against the SDK
DjtgDemo sample).
Init also gained a lazy call to Detect: jtag_open_probe can be invoked
without first running jtag_get_probes_list.
Validated on KCU105: jtag_autoinit returns IDCODE 0x13822093
(XCKU040 rev1) through the Digilent SMT2-NC.
DmgrOpen + DjtgEnable + DjtgSetSpeed at 4 MHz (Adept rounds to the
nearest supported, e.g. 3.75 MHz on SMT2-NC). DeInit does the reverse.
An atexit hook also forces Close on process shutdown — leaving an open
HIF when libdjtg's C++ static destructors run triggers "pure virtual
method called".
Loads the Adept .so files lazily and resolves the symbols we need.
Detect() enumerates devices via DmgrEnumDevices/DmgrGetDvc and exposes
each as a Viveris probe slot. If Adept Runtime is missing, the driver
silently reports 0 probes.
The probe ID printed by jtag_get_probes_list is the hex value to pass
verbatim to jtag_open_probe (parsed as base 16), but reading
"ID 0x00000000" and typing "1" as a 1-based index is a natural mistake
— and jtag_open_probe will accept 1, fail with a misleading
"FT_DEVICE_NOT_FOUND" since (drv=0, probe=1) does not exist.
Append explicit [drv N, probe M] decomposition so the value to copy is
unambiguous.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
In cmd_autoinit, when find_first_file fails to open ./bsdl_files/ the
error path printed `filename` — which is only populated inside the
directory-walk loop. Outside that loop it is uninitialized stack
content, leading to garbage in the error message (and a confusing
diagnostic when bs is launched from a directory without a bsdl_files/
subfolder, e.g. build/).
Print `scanfolder` (the actual path that was attempted) instead.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Low-level JTAG primitives operating directly on jc->io_functions
(single-device chain assumed), independent of jtag_core:
- bscan_set_ir
- bscan_shift_dr (TDI/TDO, LSB-first packing)
- bscan_idle_cycles
High-level operations driven by an fpga_target descriptor:
- bscan_load_bitstream: JPROGRAM -> CFG_IN -> shift (bit-reversed for
Xilinx) -> JSTART -> idle -> BYPASS
- bscan_load_bitstream_file: parses the Xilinx .bit container header
(sections a/b/c/d/e), falls back to raw .bin
bscan_spi_xfer is stubbed: the quartiq jtagspi protocol details will
be wired once we have a proxy .bit to validate against (OpenOCD
src/flash/nor/jtagspi.c is the host-side reference).
Three new script commands:
- bscan_set_ir <opcode_hex> <ir_length>
- bscan_shift_dr <nbits> (writes zeros, prints captured TDO)
- bscan_load_bitstream <device> <path>
The sanity check for a healthy primitive on KU15P:
jtag_init_scan; bscan_set_ir 9 6; bscan_shift_dr 32 -> 04 A5 60 93
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
modules/fpga/ holds an fpga_target struct (IDCODE/mask, family, IR
length and private opcodes, proxy bitstream path, quirks) and a
compile-time registry. Initial entry: Xilinx Kintex UltraScale+
XCKU15P, populated from bsdl_files/xcku15p_ffve1517.bsd (IDCODE
0x04A56093, IR 6, USER1=0x02, CFG_IN=0x05, JPROGRAM=0x0B, JSTART=0x0C,
JSHUTDOWN=0x0D, ISC_DISABLE=0x16, quirk CCLK_VIA_STARTUP).
Two new script commands:
- fpga_list: enumerate the registry
- fpga_info: match each device on the JTAG chain against the registry
and surface known quirks
Adding another FPGA = one entry in fpga_registry[] + its .bsd in
bsdl_files/. Proxy .bit will be wired in phase 2.5 (bscan_spi/).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
