Cannot flash or debug NUCLEO-WL55JC1

nick_misc · November 16, 2022, 11:39am

Hi, I just ordered a NUCLEO-WL55JC1 but I can’t manage to flash or debug it using Mbed Studio 1.4.4.

When I flash with Mbed Studio, it indicates that everything was successful and the program is running.
In fact, the program is not flashed properly (e.g. blinky example does not make the LED blink), but the flash seems erased or corrupted.

However, flashing using the mass-storage method works (i.e. blinky example makes the LED blink), but this is very uncomfortable and debugging still does not work.

I boiled the problem down to pyocd and tried to seek help there.
See my comment on this issue including logs:

github.com/pyocd/pyOCD

Cannot flash/debug STM32WL55JC

opened 09:29AM - 01 Nov 22 UTC

HelloHungryImDad

Hello, When trying to flash a Nucleo WL55JC1 (stm32wl55jci7u) using the comma…nd `pyocd flash --target STM32WL55JCIx --frequency 1800000 -O connect_mode=under-reset mbed-os-example-blinky.bin` I receive transfer errors. I am running the latest ST Link firmware (3.10.3) and have installed the `Keil.STM32WLxx_DFP.1.1.0-small.pack` CMSIS pack for this chip using `pyocd pack install` but it is the same if I use the one bundled with Mbed Studio or one downloaded directly from CMSIS. On first attempt I get: ``` 0000574 E Transfer error while reading AHB-AP#1 ROM table: Memory transfer fault (read) @ 0xf0000fd0-0xf000102f [ap] Traceback (most recent call last): File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/coresight/ap.py", line 797, in find_components cmpid.read_id_registers() File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/coresight/rom_table.py", line 124, in read_id_registers regs = self.ap.read_memory_block32(self.top_address + self.IDR_READ_START, self.IDR_READ_COUNT) File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/utility/concurrency.py", line 29, in _locking return func(self, *args, **kwargs) File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/coresight/ap.py", line 1216, in _accelerated_read_memory_block32 return self._accelerated_memory_interface.read_memory_block32(addr, size, File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/probe/stlink_probe.py", line 301, in read_memory_block32 return conversion.byte_list_to_u32le_list(self._link.read_mem32(addr, size * 4, self._apsel, csw)) File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/probe/stlink/stlink.py", line 473, in read_mem32 return self._read_mem(addr, size, Commands.JTAG_READMEM_32BIT, self.MAXIMUM_TRANSFER_SIZE, apsel, csw) File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/probe/stlink/stlink.py", line 423, in _read_mem raise exc pyocd.core.exceptions.TransferFaultError: Memory transfer fault (read) @ 0xf0000fd0-0xf000102f 0000591 I Loading /home/rikki/Mbed Programs/mbed-os-example-blinky-baremetal/BUILD/NUCLEO_WL55JC/ARMC6/mbed-os-example-blinky-baremetal.bin [load_cmd] [==================================================] 100% 0001317 I Erased chip, programmed 23552 bytes (23 pages), skipped 0 bytes (0 pages) at 31.69 kB/s [loader] ``` and on subsequent attempts I get: ``` 0000632 E Error reading AP#1 IDR: Memory transfer fault (STLink error (17): AP fault) [discovery] Traceback (most recent call last): File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/coresight/discovery.py", line 162, in _create_1_ap ap = AccessPort.create(self.dp, ap_address) File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/coresight/ap.py", line 367, in create ap.init() File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/utility/concurrency.py", line 29, in _locking return func(self, *args, **kwargs) File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/coresight/ap.py", line 1256, in init super().init() File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/utility/concurrency.py", line 29, in _locking return func(self, *args, **kwargs) File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/coresight/ap.py", line 778, in init _init_hprot() File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/coresight/ap.py", line 746, in _init_hprot csw = AccessPort.read_reg(self, self._reg_offset + MEM_AP_CSW) File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/utility/concurrency.py", line 29, in _locking return func(self, *args, **kwargs) File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/coresight/ap.py", line 453, in read_reg return self.dp.read_ap(self.address.address + addr, now) File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/coresight/dap.py", line 875, in read_ap result_cb = self.probe.read_ap(addr, now=False) File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/probe/stlink_probe.py", line 207, in read_ap result = self._link.read_dap_register(apsel, addr & 0xffff) File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/probe/stlink/stlink.py", line 521, in read_dap_register self._check_status(response[:2]) File "/home/rikki/.local/lib/python3.10/site-packages/pyocd/probe/stlink/stlink.py", line 363, in _check_status raise self._ERROR_CLASSES[status](error_message) pyocd.core.exceptions.TransferFaultError: Memory transfer fault (STLink error (17): AP fault) 0000657 I Loading /home/rikki/Mbed Programs/mbed-os-example-blinky-baremetal/BUILD/NUCLEO_WL55JC/ARMC6/mbed-os-example-blinky-baremetal.bin [load_cmd] [==================================================] 100% 0001769 I Erased 24576 bytes (12 sectors), programmed 23552 bytes (23 pages), skipped 0 bytes (0 pages) at 20.69 kB/s [loader] ``` Is this indicating that the pack is malformed? How do I fix this?

Is there anything else I can try?
For instance, is there a Mbed Studio / pyocd version that is known to work with the NUCLEO-WL55JC1?

Thank you

Kojto · November 18, 2022, 10:49am

I see you are getting some help on pyOCD issue. It’s the best place to discuss the problem there as it is most likely a bug somewhere there.

@jeromecoutant is there known issue with this board?

nick_misc · November 21, 2022, 10:44am

Thanks for you reply!

I will keep you updated here

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Cannot flash or debug NUCLEO-WL55JC1

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