My setup:
Common) CPU: at91sam7x512, JTAG: olimex-arm-usb-tiny-h, proprietary single-CPY board
1) Windows 7, OpenOCD 0.0.4 <- works 2) Ubuntu 13.04, OpenOCD 0.7.0 <- strange error
There are some config files written in past times and the windows version works. Now I am trying to make things work under linux.
The manufacturer's page doesn't seem to have a ready config file, although they have instructions for building OpenOCD.
I built it with ft2232 support. OpenOCD seems to locate the JTAG, but not the device:
sw3@pc90313-sw3:~/ocd_conf$ openocd -f ocdconfig.cfg
Open On-Chip Debugger 0.7.0 (2013-08-16-13:27)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.sourceforge.net/doc/doxygen/bugs.html
Info : only one transport option; autoselect 'jtag'
adapter speed: 20 kHz
srst_only srst_pulls_trst srst_gates_jtag srst_open_drain connect_deassert_srst
Info : device: 6 "2232H"
Info : deviceID: 364511274
Info : SerialNumber: OLWKRKY?A
Info : Description: Olimex OpenOCD JTAG ARM-USB-TINY-H A
Info : max TCK change to: 30000 kHz
Info : clock speed 20 kHz
fError: couldn't read enough bytes from FT2232 device (70 < 81)
Error: couldn't read from FT2232
Error: Trying to use configured scan chain anyway...
Warn : Bypassing JTAG setup events due to errors
Info : Embedded ICE version 1
Info : sam7x512.cpu: hardware has 2 breakpoint/watchpoint units
Here is my config file:
sw3@pc90313-sw3:~/ocd_conf$ cat ocdconfig.cfg
source [find interface/olimex-arm-usb-tiny-h.cfg]
adapter_khz 20
source [find target/at91sam7x512.cfg]
This error Error: couldn't read enough bytes from FT2232 device (70 < 81)
seems to be the give-away. Other people in Googleland have experienced similar problems, but with (0 < 81) in which case it is clear that communication is not working at all. In my case, the number oscillates at 69-79-71.
Ideas?
Answer
The FT2232H uses High Speed USB, and the error translates into "problem in USB communication". I`d recommend trying another USB cable first - but this seems not to be a problem here, as it works in other configurations.
You should use the newer ftdi
driver in OpenOCD 0.7.0
:
source [find interface/ftdi/olimex-arm-usb-tiny-h.cfg]
You can ignore the warning, the interface was tested to be OK, but after the 0.7.0
release.
Updating the OpenOCD windows binaries might be a good idea, too - the 0.4.0
release is getting rusty.
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