One of the patches since the merge of the ti_dm355.cfg line-end update seems to have broken some aspect of scan chain discovery. See the openocd server startup transcript below, with "scan_chain" command debug output. (FWIW, using with an Olimex ft2232 adapter.)
The recent TAP changes forced a slowdown from 3 MHz to 1.5 MHz; "why" is unclear to me, but the failure mode was similar: it found just the last of the three TAPs listed (i.e. the one that is hooked up right next to TDI on the SoC). Which suggested a potential workaround here: slow TCK down even more. Sure enough, at 750 KHz the startup doesn't fail... I'm hoping that this recent trend of needing to halve the clock rate after each "svn up" can be halted and then reversed. There would seem to be some hard limits coming up soon ... ;) - Dave ================ Open On-Chip Debugger 0.2.0-in-development (2009-05-07-08:37) svn:1649 BUGS? Read http://svn.berlios.de/svnroot/repos/openocd/trunk/BUGS $URL: svn://svn.berlios.de/openocd/trunk/src/openocd.c $ 1500 kHz use of EmbeddedICE dbgrq instead of breakpoint for target halt enabled fast memory access is enabled dcc downloads are enabled Info : JTAG tap: dm355.etb tap/device found: 0x0b73b02f (Manufacturer: 0x017, Part: 0xb73b, Version: 0x0) Error: JTAG tap: dm355.etb got: 0x0b73b02f (mfg: 0x017, part: 0xb73b, ver: 0x0) Error: JTAG tap: dm355.etb expected 1 of 1: 0x2b900f0f (mfg: 0x787, part: 0xb900, ver: 0x2) Error: trying to validate configured JTAG chain anyway... Error: Could not validate JTAG scan chain, IR mismatch, scan returned 0xFFC1. tap=dm355.arm pos=4 expected 0x1 got 0 Warn : Could not validate JTAG chain, continuing anyway... Warn : TAP dm355.arm: Warn : value captured during scan didn't pass the requested check: Warn : captured: 0x0C check_value: 0x01 check_mask: 0x0F Warn : in_handler: w/o "in_value", mismatch in SIR Warn : TAP dm355.arm: Warn : value captured during scan didn't pass the requested check: Warn : captured: 0x0C check_value: 0x01 check_mask: 0x0F Warn : in_handler: w/o "in_value", mismatch in SIR Warn : no telnet port specified, using default port 4444 Info : accepting 'telnet' connection from 0 TapName | Enabled | IdCode Expected IrLen IrCap IrMask Instr ---|--------------------|---------|------------|------------|------|------|------|--------- 0 | dm355.etb | Y | 0x0b73b02f | 0x2b900f0f | 0x04 | 0x01 | 0x0f | 0x0f 1 | dm355.arm | Y | 0x00000000 | 0x07926001 | 0x04 | 0x01 | 0x0f | 0x0c 2 | dm355.jrc | Y | 0x00000000 | 0x0b73b02f | 0x06 | 0x01 | 0x3f | 0x3f _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
