IMX31 reset not working, JTAG disconnects

Development Boards MicroMod
1

Hi,

I tried using the scripts delivered with openOCD 0.5 on windows with Olimex “arm-usb-ocd-h”.

With the default settings (just starting openOCD and connect to the target) I always get disconnected from the olimex:

C:\Documents and Settings\tstone10\Desktop\openocd-0.5.0\bin>openocd-0.5.0.exe -f ../interface/olimex-arm-usb-ocd-h.cfg -f ../board/imx31pdk
.cfg
Open On-Chip Debugger 0.5.0 (2011-08-09-23:21)
Licensed under GNU GPL v2
For bug reports, read
        http://openocd.berlios.de/doc/doxygen/bugs.html
Info : only one transport option; autoselect 'jtag'
trst_and_srst separate srst_gates_jtag trst_push_pull srst_open_drain
adapter_nsrst_delay: 5
Warn : imx31.whatchacallit: nonstandard IR value
RCLK - adaptive
imx31pdk_init
Info : max TCK change to: 30000 kHz
Info : RCLK (adaptive clock speed)
Info : JTAG tap: imx31.etb tap/device found: 0x2b900f0f (mfg: 0x787, part: 0xb900, ver: 0x2)
Info : JTAG tap: imx31.cpu tap/device found: 0x07b3601d (mfg: 0x00e, part: 0x7b36, ver: 0x0)
Info : TAP imx31.whatchacallit does not have IDCODE
Info : JTAG tap: imx31.smda tap/device found: 0x2190101d (mfg: 0x00e, part: 0x1901, ver: 0x2)
Info : found ARM1136
Info : imx31.cpu: hardware has 6 breakpoints, 2 watchpoints
Warn : ETMv2+ support is incomplete
Info : ETM v3.1
Info : accepting 'telnet' connection from 4444
invalid command name "reset-init"
Error: couldn't read enough bytes from FT2232 device (0 < 81)
Error: couldn't read from FT2232
Error: Trying to use configured scan chain anyway...
Error: imx31.etb: IR capture error; saw 0x0f not 0x01
Warn : Bypassing JTAG setup events due to errors
Error: 'arm11 target' JTAG error SCREG OUT 0x1f
Error: unexpected ARM11 ID code

Any ideas what the problem could be?

2

Ok, the reason for the different types of issues with “reset” (soft and hard reset as well as jtag reset) are simply a problem with the communication between Olimex debugger and the openOCD itself.

To overcome this, you need to set the delays for start of communication after reset:

jtag_nsrst_delay: 200

There are more parameters in openOCD to set here (all similar XX_delay) that want to be set as well.