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pyocd / pyOCD

Open source Python library for programming and debugging Arm Cortex-M microcontrollers
https://pyocd.io
Apache License 2.0
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"No cores were discovered!" with STM32H743ZI and Mbed studio #896

Open fabiencomte opened 4 years ago

fabiencomte commented 4 years ago

Hello, When I try to debug a STM32H743ZI CPU with Mbed Studio, it fails.

0000700:INFO:ap:AP#2 IDR = 0x54770002 (APB-AP var0 rev5)
0000703:INFO:rom_table:AP#0 ROM table #0 @ 0xe00fe000 (designer=020 part=450)
0000705:INFO:rom_table:[0]
0000705:INFO:rom_table:  AP#0 ROM table #1 @ 0xe00ff000 (designer=43b part=4c7)
0000707:ERROR:ap:Transfer error while reading AP#0 ROM table: SWD/JTAG Transfer Fault @ 0xe000efbc-0xe000f043
0000708:INFO:rom_table:AP#2 ROM table #0 @ 0xe00e0000 (designer=020 part=450)
0000710:WARNING:rom_table:Invalid coresight component, cidr=0x0
0000710:INFO:rom_table:[2]
0000717:WARNING:rom_table:Invalid coresight component, cidr=0x0
0000717:INFO:rom_table:[3]
0000718:INFO:rom_table:[4]
0000720:ERROR:ap:Transfer error while reading AP#2 ROM table: SWD/JTAG Transfer Fault @ 0xe00f0fbc-0xe00f1043
0000721:CRITICAL:__main__:No cores were discovered!
Traceback (most recent call last):
  File "c:\ProgramData\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\__main__.py", line 343, in run
    self._COMMANDS[self._args.cmd](self)
  File "c:\ProgramData\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\__main__.py", line 571, in do_gdbserver
    with session:
  File "c:\ProgramData\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\core\session.py", line 287, in __enter__
    self.open()
  File "c:\ProgramData\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\core\session.py", line 367, in open
    self._board.init()
  File "c:\ProgramData\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\board\board.py", line 83, in init
    self.target.init()
  File "c:\ProgramData\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\core\coresight_target.py", line 164, in init
    seq.invoke()
  File "c:\ProgramData\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\utility\sequencer.py", line 208, in invoke
    resultSequence = call()
  File "c:\ProgramData\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\core\coresight_target.py", line 298, in check_for_cores
    raise exceptions.DebugError("No cores were discovered!")
pyocd.core.exceptions.DebugError: No cores were discovered!
"GDB server stopped unexpectedly with exit code 1"

If I do basic checks outside, it looks correct:

bin\openocd.exe --version
xPack OpenOCD, 64-bit Open On-Chip Debugger 0.10.0+dev (2019-07-17-11:28)
Licensed under GNU GPL v2
For bug reports, read
        http://openocd.org/doc/doxygen/bugs.html

bin\openocd.exe -f scripts/interface/stlink.cfg -c "adapter_khz 1000; transport select hla_swd" -f scripts/target/stm32h7x.cfg
xPack OpenOCD, 64-bit Open On-Chip Debugger 0.10.0+dev (2019-07-17-11:28)
Licensed under GNU GPL v2
For bug reports, read
        http://openocd.org/doc/doxygen/bugs.html
hla_swd
Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Info : clock speed 1800 kHz
Info : STLINK V2J36S7 (API v2) VID:PID 0483:3748
Info : Target voltage: 3.247431
Info : stm32h7x.cpu: hardware has 71 breakpoints, 0 watchpoints
Info : Listening on port 3333 for gdb connections

Configuration: Windows 10 x64, Mbed Studio 1.0.0, xpack-openocd-0.10.0-13-win32-x64

whj4674672 commented 4 years ago

I met the same problem as you. Have you solved it？

mikkleini commented 4 years ago

Joining the club

Razario commented 3 years ago

A similar problem. Who can decide? Ready to donate

jbrover commented 3 years ago

Same problem!

majcher commented 2 years ago

+1

flit commented 2 years ago

Please note that Mbed Studio uses a customised installation of pyocd. Although I'm perfectly happy to help with general pyocd usage, I can't support Mbed Studio's integration. So you really need to raise support requests like this with the Mbed Studio folks.

The DBGMCU.CR register must be configured to enable all clocks and set low power debug modes. In particular, TRACECLKEN, D1DBGCKEN, and D3DBGCKEN need to be set, plus the DBG{SLEEP,STOP,STBY}_* bits.

This can be done with a user script, or you can do it in your firmware and use drag and drop flash programming to get the initial firmware loaded.

Another option is to test a branch where I'm implementing CMSIS-Pack debug sequences support, which allows for automatic configuration of DBGMCU on STM32 devices. Install with this command:

pip install git+https://github.com/flit/pyOCD.git@feature/debug_sequences