Tiva TM4C-129X (DK), OpenOCD

Hello Quang,

1. Which DK or EK board are you using or is it a custom board?

2. What is the cfg file you are using. Can you please attach the same?

3. What is the Emulator HW you are using?

4. Which version of OPENOCD is this?

Regards

Amit

Hi Amit,

1. Sorry I'm wrong. It's my customer kit based on platform TM4C129ENCPDT with ecternal OSC. 25Mhz.

2. Attached You will find the .cfg files

3. I'm using emulator from J-link SEGGER USB-JTAG, the black one.

4. OpenOCD version 0.8 - dev.

I think I'm wrong in config for registers, can you check them?

 Thank you,

Quang

PS: I attached the second .cfg file

Quang

I tried it but no succes. Here is my output on terminal.

openocd -s /openocd/ -f 3su1.cfg -c "init;halt;reset init;sleep 1000;flash probe 0;flash write_image erase 3su1_led.elf;sleep 100;resume;shutdown"

Open On-Chip Debugger 0.8.0-dev-00382-g1262f9b-dirty (2014-03-17-15:46)
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: 500 kHz
srst_only separate srst_gates_jtag srst_open_drain connect_deassert_srst
adapter_nsrst_delay: 100
TapName Enabled IdCode Expected IrLen IrCap IrMask
-- ------------------- -------- ---------- ---------- ----- ----- ------
0 TM4C129ENCPDT.cpu Y 0x00000000 0x4ba00477 4 0x01 0x0f
Info : J-Link initialization started / target CPU reset initiated
Info : J-Link ARM V8 compiled Dec 1 2009 11:42:48
Info : J-Link caps 0xb9ff7bbf
Info : J-Link hw version 80000
Info : J-Link hw type J-Link
Info : J-Link max mem block 9576
Info : J-Link configuration
Info : USB-Address: 0x0
Info : Kickstart power on JTAG-pin 19: 0x0
Info : Vref = 3.248 TCK = 1 TDI = 0 TDO = 1 TMS = 0 SRST = 0 TRST = 0
Info : J-Link JTAG Interface ready
Info : clock speed 500 kHz
Info : JTAG tap: TM4C129ENCPDT.cpu tap/device found: 0x4ba00477 (mfg: 0x23b, part: 0xba00, ver: 0x4)
Info : TM4C129ENCPDT.cpu: hardware has 6 breakpoints, 4 watchpoints
target state: halted
target halted due to debug-request, current mode: Thread
xPSR: 0x81000000 pc: 0x000004b8 msp: 0x200000ec
Info : JTAG tap: TM4C129ENCPDT.cpu tap/device found: 0x4ba00477 (mfg: 0x23b, part: 0xba00, ver: 0x4)
Error: JTAG-DP STICKY ERROR
Error: MEM_AP_CSW 0x23000040, MEM_AP_TAR 0x0
Error: timed out while waiting for target halted
TARGET: TM4C129ENCPDT.cpu - Not halted

in procedure 'reset'
make: *** [load] Error 1

Thanks,

Quang

Hello Quang,

Looking at the logs

target state: halted
target halted due to debug-request, current mode: Thread
xPSR: 0x81000000 pc: 0x000004b8 msp: 0x200000ec

it seems that there is already some code that has been loaded. It could be possible that the code is preventing a successful JTAG connection. Can you let me know what is that was already loaded. The OPENOCD connection the first time around should have worked after which you have been facing this issue.

Regards

Amit

Hello Quang,

So the first time when the MCU did not reset, you added this statement. Is that correct?

After adding this statement it started giving an error. Is that correct?

Now when the SRST is asserted assuming that reset from J-LINK is connected to the RST_N Pin of the device, the device will re-start. The Debugger will also try to reconnect in the meantime causing Fault to appear and since a halt is not issued it will not halt the core causing it to break. Can you add "halt" as part of the load routine.

openocd -s /openocd/ -f 3su1.cfg -c "init; reset init; sleep 1000; halt; flash probe 0;flash write_image erase 3su1_led.elf;sleep 100;resume;shutdown"

Regards

Amit

Please also note that reset_config affects the way reset is given to the device.

http://openocd.sourceforge.net/doc/html/Reset-Configuration.html#srstandtrstissues

Hello Amit,

After adding this statement it started giving an error. Is that correct? --> exactly!

openocd -s /openocd/ -f 3su1.cfg -c "init; reset init; sleep 1000; halt; flash probe 0;flash write_image erase 3su1_led.elf;sleep 100;resume;shutdown" 

-> no success. I can load my .elf without ERROT but without reset_config. After loading, I have remove power to reset MCU.

Now, I use JTAG-KEY 2 from AMONTEC, no changed. About NST_N pin, I will check and give you the feedback. 

PS: RST_N pin. Sorry

Hello Quang,

I moved the reset init after loading the code and the new code now works for me,

openocd -s /openocd/ -f 3su1.cfg -c "init;halt;flash probe 0;flash write_image erase 3su1_led.elf;sleep 100;reset init ;shutdown"

Please note I am using FTDI drivers and not JLINK but the issue as you mentioned exists for FTDI interface also.

Regards

Amit

Hello Amit,

can you send your all .cfgs files to me? Better to email: hquangcvut@yahoo.com

Thank you,

Quang