[OpenOCD-devel] Problems with DM368

[Joel H. <jo...@ai...>]

Hi All,

I'm tackling a couple of issues that maybe this list can help me with.

My setup is a bespoke board with a TI DM368 (very similar to the
Davinci DM365) with a Flyswatter 2 adapter.

I have two problems:

1. I'm having trouble connecting. The only way I can get it to
enumerate the TAPs is if I press the board reset button with the
ribbon cable disconnected, then connect the ribbon, then run openocd.
If I don't follow this procedure, it times out with "Error: couldn't
read enough bytes from FT2232 device (0 < 81)" messages.

Any ideas why this would be?

2. My JTAG port doesn't have a SRST pin on it, so I want to use
davinci_wdog_reset. Unfortunately this fails because of a problem with
the mww command. If I call the offending command in isolation (mww
phys 0x01c21c28 0x00004000) with the debug level set to three, I get
the following messages printed:

Debug: 407 43677 command.c:145 script_debug(): command - ocd_command
ocd_command type ocd_mww phys 0x01c21c28 0x00004000
Debug: 408 43677 command.c:145 script_debug(): command - mww ocd_mww
phys 0x01c21c28 0x00004000
Debug: 410 43677 command.c:631 run_command(): Command failed with
error code -304
User : 411 43678 command.c:669 command_run_line(): in procedure 'mww'

I added some printfs to the jim_target_mw function, which showed that
the function is never called. It's as if the binding is failing somehow.

Any ideas?

Best Regards
Joel Holdsworth