Cannot debug with NXP LPC1768

Mbed OS
1

I can run the blinky example on LPC1768 with MbedStudio 1.0 but I can’t start the debugger.

Does MbedStudio support debugging with LPC1768? If yes, how?

2

Hello,

probably because the LPC1768 is still not on the list of supported targets for the debug functionality.

BR, Jan

3

Hi @ztrf,

Unfortunately Mbed Studio does not support debugging LPC1768 at the moment. Reason behind it is the bug in pyOCD (TransferError when debugging Mbed-LPC1768 · Issue #745 · pyocd/pyOCD · GitHub). We understand how popular this target is. We are actively working on the solution.

Thanks,
Arek - Mbed Studio team

4

Hello Arek,

I can debug mbed programs built with GCC ARM for the mbed LPC1768 board with pyOCD, but it requires to delete the following two lines from the "device_has" section of the "LPC1768" target in the targets.json file:

...
            "LOCALFILESYSTEM",
...
            "SEMIHOST",

Unfortunately this workaround does not work with the Mbed Studio. However, the reported error seems to be different than the one reported in the “pyOCD/issues/745”:

...
pyocd.core.exceptions.TransferError: No ACK received
"0005869:ERROR:gdbserver:Unhandled exception in handle_message: No ACK received"
Remote failure reply: E01

Maybe it can help your team to hunt down the bug.

Best regards,

Zoltan

5

Hi Zoltan,

Thank you. Much appreciated. Can you also let me know the platform you are on and version of pyOCD you are using?

Thanks,
Arek - Mbed Studio team

6

Hello Arek,

I’m using pyOCD 0.8.0 and as far as I remember I’ve got it along with the mbed-cli package. But I’m not hundred percent sure. It works on both Ubuntu 18.04 LTS and MS Windows 7 64-bit (and also 32-bit) to debug mbed OS 2, mbed OS 5 and mbed OS 6 programs on mbed LPC1768 boards.

Best regards,

Zoltan

7

Hi Zoltan,

That explains why it works for you. To my knowledge problems with debugging LPC1768 started in pyOCD 0.10.0. Mbed Studio 1.0.0 uses pyOCD 0.23.0.

Thanks,
Arek - Mbed Studio team