Mbed studio: Nuvoton M2354: build failed

[lunchboxwu]

Description of defect

On ARM Mbed Studio, targeting NUMAKER-M2354 v1.1 (NU_M2354), mbed-os-example-blinky (mbed-os 6.17.0) build failed with error log listed below. Tried other sample projects like mbed-os-empty with no avail either.

Target(s) affected by this defect ?

MCU: Nuvoton M2354 Board: NUMAKER-M2354 v1.1 (NU_M2354)

Toolchain(s) (name and version) displaying this defect ?

ARMC6

What version of Mbed-os are you using (tag or sha) ?

mbed-os 6.17.0 Commit: 17dc3dc2e6e2817a8bd3df62f38583319f0e4fed

What version(s) of tools are you using. List all that apply (E.g. mbed-cli)

Mbed Studio: 1.4.5

How is this defect reproduced ?

1. Log in Mbed Studio
2. Click File > New Program > mbed-os-example-blinky > Add Program
3. Update library to mbed-os-6.17.0 if not yet
4. Specify NUMAKER-M2354 as target hardware
5. Build failed with log:

Image: BUILD/NU_M2354/ARMC6\mbed-os-example-blinky.bin 0002874:CRITICAL:main:cannot read register r0 because core #0 is not halted Traceback (most recent call last): File "c:\Users\lunch\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd__main.py", line 402, in run self._COMMANDSself._args.cmd File "c:\Users\lunch\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\main__.py", line 579, in do_flash file_format=self._args.format) File "c:\Users\lunch\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\flash\file_programmer.py", line 157, in program self._loader.commit() File "c:\Users\lunch\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\flash\loader.py", line 168, in commit keep_unwritten=self._keep_unwritten) File "c:\Users\lunch\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\flash\builder.py", line 464, in program flash_operation = self._chip_erase_program_double_buffer(progress_cb) File "c:\Users\lunch\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\flash\builder.py", line 706, in _chip_erase_program_double_buffer self.flash.erase_all() File "c:\Users\lunch\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\flash\flash.py", line 345, in erase_all result = self._call_function_and_wait(self.flash_algo['pc_eraseAll']) File "c:\Users\lunch\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\flash\flash.py", line 604, in _call_function_and_wait return self.wait_for_completion() File "c:\Users\lunch\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\flash\flash.py", line 600, in wait_for_completion return self.target.read_core_register('r0') File "c:\Users\lunch\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\core\soc_target.py", line 173, in read_core_register return self.selected_core.read_core_register(id) File "c:\Users\lunch\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\coresight\cortex_m.py", line 911, in read_core_register regValue = self.read_core_register_raw(reg_info.index) File "c:\Users\lunch\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\coresight\cortex_m.py", line 928, in read_core_register_raw vals = self.read_core_registers_raw([reg]) File "c:\Users\lunch\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\coresight\cortex_m.py", line 949, in read_core_registers_raw return self._base_read_core_registers_raw(reg_list) File "c:\Users\lunch\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\coresight\cortex_m.py", line 967, in _base_read_core_registers_raw self.core_number)) pyocd.core.exceptions.CoreRegisterAccessError: cannot read register r0 because core #0 is not halted

[mbedmain]

@lunchboxwu thank you for raising this issue.Please take a look at the following comments:

Could you add some more detail to the description? A good description should be at least 25 words.

NOTE: If there are fields which are not applicable then please just add 'n/a' or 'None'. This indicates to us that at least all the fields have been considered. Please update the issue header with the missing information.

[0xc0170]

cc @ARMmbed/team-nuvoton

[ccli8]

The error log is related to pyocd. Currently, M2354 board's NuLink2 doesn't support flash or debug on Mbed Studio. Just build code only, that is, on Mbed Sutdio, click Build program, neither Run program nor Debug program. To flash code, go USB drag-and-drop programming.

[cyliangtw]

@ccli8 In fact, M2354 support pyocd in Jun 2021 at: https://github.com/pyocd/pyOCD/blob/main/pyocd/target/builtin/target_M2354.py

please esnure Nu-Link2 with correct F/W and mbed-studio with up-to-date pyOCD pack.

[cyliangtw]

After checking, Nu-Link2 default F/W is for normal drag-drop & mbed green-tea test support. For M2354 mbed-studio debug support, you must update as NuLink2_DAPLink_for_numaker_m2354.bin. How to update Nu-Link2 F/W, please refer to the steps of sub topic DAP Link Interface Firmware Update at: https://os.mbed.com/platforms/NUMAKER-M2354/

[ccli8]

For M2354 mbed-studio debug support, you must update as NuLink2_DAPLink_for_numaker_m2354.bin.

This is necessary. However, Mbed Studio's inbuilt pyOCD version 0.30.2 hasn't supported M2354. Upgrade this inbuilt pyOCD to latest version manually may break Mbed Studio. So Flash & Debug for M2354 are still not supported on Mbed Studio.

[cyliangtw]

Manual upgrade pyocd is relative to python site package, for ex "Python38\Lib\site-packages\pyocd". My environment is pyocd v0.34.0 and get:

[cygwin~zephyr]$ pyocd list --targets | grep Nuvoton
  m2354kjfae                Nuvoton                 M2354KJFAE                              builtin 
  m252kg6ae                 Nuvoton                 M252KG6AE                               builtin 
  m263kiaae                 Nuvoton                 M263KIAAE                               builtin 
  m467hjhae                 Nuvoton                 M467HJHAE                               builtin 
  m487jidae                 Nuvoton                 M487JIDAE                               builtin 

In mbed studio environment console, it should reach python path and could manual update by "pip install pyocd" ?

[ccli8]

In mbed studio environment console, it should reach python path and could manual update by "pip install pyocd" ?

Yes. In Mbed Studio, open builtin console through Terminal > New Terminal and run like pip install -U pyocd to upgrade pyocd. But I don’t suggest doing it because as reported it will break Mbed Studio on pyocd relative files.

[ccli8]

To enable flashing and debugging M2354 on Mbed Studio, please follow the flow:

1. Apply #15427 to fix Mbed OS application program doesn't start on the sector boundary. This is required by pyOCD Debug.

2. Follow the procedure to upgrade NuLink2 F/W to v7509 or later. After upgrade is finished and USB is reconnected, open NU_CFG.TXT in the USB drive and check its content:

   • Version >= 7509 (Version=7509)
   • CMSIS DAP enabled (CMSIS-DAP=1).

   If either doesn't meet, apply one clean upgrade through ICP Tool instead of drag-and-drop upgrade as mentioned in As While DAP Button Not Work section in above procedure.

   NOTE: As of this writing, v7509 is not released yet.

3. Mbed Studio 1.4.5 + pyOCD 0.30.2 doesn't support M2354 natively. Go extended support way through CMSIS Pack (detailed below).

[ccli8]

To extend pyOCD support for M2354 via CMSIS Pack, follow the procedure (verified on Windows 10):

1. Download Nuvoton.NuMicro_DFP.1.3.20.pack. Assume it is saved in C:\Users\MY_ACCOUNT\Downloads.

2. Connect M2354. Launch Mbed Studio.

3. Follow Manage Custom Targets. In DebugFlags field, override its content with --target M2354KJFAE. Click Save All. This is to generate draft custom_targets.json which needs further editing.

4. Find custom_targets.json through Help > Report an issue. Click Access Log to open the directory containing custom_targets.json.

5. Exit Mbed Studio.

6. Open custom_targets.json. All content may place in single line. Try google "pretty json" to find one tool to pretty print it.

7. Based on existent content, edit like below. Save it.

   {
       "13120000002B005104448580000009FA": {
           "debugFlags": "--target M2354KJFAE --pack \"C:\\Users\\MY_ACCOUNT\\Downloads\\Nuvoton.NuMicro_DFP.1.3.20.pack\"",
           "productCode": "1312",
           "debugTarget": "M2354KJFAE",
           "cmsisPack": "C:\\Users\\MY_ACCOUNT\\Downloads\\Nuvoton.NuMicro_DFP.1.3.20.pack"
       }
   }

8. Re-launch Mbed Studio. If everything goes smooth, flashing and debugging M2354 should be OK.

[cyliangtw]

This issue was fixed and could be closed.