[Openocd-development] PIC32 Open OCD and Flyswatter - failure to complete initialisation

[Strontium <str...@gm...>]

Hi all.

I know that OpenOCD contains support code for PIC 32.  But TinCanTools 
say the following:

> Please note that since this JTAG adapter board is intended for use 
> with a MIPS CPU,  OpenOCD cannot be used with this adapter board.  
> OpenOCD does not support MIPS processors.

This is clearly not correct, because I can connect to my PIC32 USB 
Starter Board (Through the JTAG interface on the IO Expansion Board) 
Using their MIPS header and get some semblance of a sensible reply.

Using a fresh OpenOCD checkout from head (as of an hour ago). The 
problem I get is, after I connect, the flyswatter flashes LED2 and LED3 
alternately for a while and then crashes out.  This is my first attempt 
at using OpenOCD on PIC32 so I don't know if another version works 
better with it or not.

Anyway Here is the Message output:
> Open On-Chip Debugger 0.3.0-in-development (2009-09-11-20:28) svn:2694
> $URL: svn://svn.berlios.de/openocd/trunk/src/openocd.c $
> For bug reports, read 
> http://svn.berlios.de/svnroot/repos/openocd/trunk/BUGS
> jtag_nsrst_delay: 100
> jtag_ntrst_delay: 100
> Info : clock speed 6000 kHz
> Info : JTAG tap: pic32mx.cpu tap/device found: 0x50978053 (mfg: 0x029, 
> part: 0x0978, ver: 0x5)
> Info : device id = 0x50978053 (manuf 0x029 dev 0x78, ver 0x509)
> Info : flash size = 512kbytes
> flash 'pic32mx' found at 0xbd000000
> Info : device id = 0x50978053 (manuf 0x029 dev 0x78, ver 0x509)
> Info : flash size = 12kbytes
> flash 'pic32mx' found at 0xbfc00000
> Open On-Chip Debugger 0.3.0-in-development (2009-09-11-20:28) svn:2694
>     TargetName         Type       Endian TapName            State       
> --  ------------------ ---------- ------ ------------------ ------------
>  0* pic32mx.cpu        mips_m4k   little pic32mx.cpu        running

Sometimes it will stop here and flash the leds for ever, other times it 
flashes them for a while (many seconds) and then crashes and outputs:
> Error: couldn't read the requested number of bytes from FT2232 device 
> (0 < 5)
> Error: couldn't read from FT2232
> Error: register read failed
> Error: couldn't read the requested number of bytes from FT2232 device 
> (0 < 5)
> Error: couldn't read from FT2232
> Error: register read failed
> Error: ftdi_read_data: usb bulk read failed
> Error: couldn't read from FT2232
> Error: register read failed
> Error: ftdi_write_data: usb bulk write failed
Here is my target script:

> # Change this to point to your particular interface
> source [find interface/flyswatter.cfg]
>
> set CPUTAPID 0x50978053
> source [find target/pic32mx.cfg]
>
> init
> flash probe 0
> flash probe 1
> version
> targets
pic32mx.cfg is stock, as checked out from SVN, with the small exception 
that I changed these lines in it to suppress a warning:

>
> flash bank pic32mx 0xbd000000 0 0 0 0
> flash bank pic32mx 0xbfc00000 0 0 0 0
changed to:

> flash bank pic32mx 0xbd000000 0 0 0 $_TARGETNAME
> flash bank pic32mx 0xbfc00000 0 0 0 $_TARGETNAME

Any suggestions to get to the point where I can connect with Telnet or 
GDB would be greatly appreciated as I am a bit snookered at the moment.  
Editing those lines neither improved or made the situation I experience 
any worse.

Thanks,
Strontium