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[mrechte]

Hello,

Trying to setup openOCD on a STM32 F4 Discovery kit, I was faced with following errors (see listing next).

I currently use texane st-flash tool to flash the MCU, but st-util does not start, reporting an error (see issue https://github.com/texane/stlink/issues/322) on that same board.

Thanks in advance for your assistance.

Marc

$ openocd -f interface/stlink-v2.cfg -f board/stm32f429discovery.cfg
Open On-Chip Debugger 0.9.0 (2015-05-19-13:44)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
Warn : Interface already configured, ignoring
Error: already specified hl_layout stlink
Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
adapter speed: 2000 kHz
adapter_nsrst_delay: 100
none separate
srst_only separate srst_nogate srst_open_drain connect_deassert_srst
Info : Unable to match requested speed 2000 kHz, using 1800 kHz
Info : Unable to match requested speed 2000 kHz, using 1800 kHz
Info : clock speed 1800 kHz
Info : STLINK v2 JTAG v17 API v2 SWIM v0 VID 0x0483 PID 0x3748
Info : using stlink api v2
Info : Target voltage: 2.882256
Error: jtag status contains invalid mode value - communication failure
Polling target stm32f4x.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 100ms
Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target stm32f4x.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 300ms
Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target stm32f4x.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 700ms
Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target stm32f4x.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 1500ms
Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target stm32f4x.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 3100ms
Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target stm32f4x.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 6300ms
Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target stm32f4x.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 6300ms
Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target stm32f4x.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 6300ms
Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target stm32f4x.cpu failed, trying to reexamine
...

[mrechte]

Please could somebody help, it is really frustrating to get stuck on setting up a dev environnement ? Thanks

I upgraded the ST Link firmware from Linux using the ST supplied Java package (V2.J17 => V2.J24). So it seems my hardware and Linux conf are OK.

However the problem remains the same:

$ openocd -f board/stm32f429discovery.cfg
Open On-Chip Debugger 0.9.0 (2015-05-19-13:44)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
adapter speed: 2000 kHz
adapter_nsrst_delay: 100
none separate
srst_only separate srst_nogate srst_open_drain connect_deassert_srst
Info : Unable to match requested speed 2000 kHz, using 1800 kHz
Info : Unable to match requested speed 2000 kHz, using 1800 kHz
Info : clock speed 1800 kHz
Info : STLINK v2 JTAG v24 API v2 SWIM v0 VID 0x0483 PID 0x3748
Info : using stlink api v2
Info : Target voltage: 2.885933
Error: jtag status contains invalid mode value - communication failure
Polling target stm32f4x.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 100ms
Info : Previous state query failed, trying to reconnect
...

[mrechte]

I think I found the reason. See http://nuttx.org/doku.php?id=wiki:howtos:jtag-debugging