Debugging Arduino Due with Black Magic Probe and VScode/W10

Advanced Solutions Debugging
#1

Hey,
Apologies but setting up toolchains is all quite new to me, so apologies if I have missed any obvious steps.

My platform.ini is:

[env:due]
platform = atmelsam
board = due
framework = arduino
debug_tool = blackmagic
debug_port = \.\COM22

and the output of pio device list is:

COM1
----
Hardware ID: ACPI\PNP0501\1
Description: Communications Port (COM1)

COM3
----
Hardware ID: USB VID:PID=2341:003D SER=85734323030351F081B2 LOCATION=1-1.6
Description: Arduino Due Programming Port (COM3)

COM23
-----
Hardware ID: USB VID:PID=1D50:6018 SER=8
Description: USB Serial Device (COM23)

COM22
-----
Hardware ID: USB VID:PID=1D50:6018 SER=8 LOCATION=1-1.1:x.2
Description: USB Serial Device (COM22)

I have tried with both COM23 and COM22. but I still get the same error when trying to start debugging:
Failed to launch GDB: .pioinit 16: error in sourced command file: \\.\COM22 No such file or directory

Thanks for any help you can offer!

Black Magic Probe & Arduino Due can't debug or upload
#2

So have you tried COM22 or COM23 without \.\?

#3

Hey!
I have tried ignoring the debugging stage for now, and tried uploading using the Black Magic Probe, to see if it will at least work in this way. But I am getting stuck. My platform.ini now reads:

[env:due]
platform = atmelsam
board = due
framework = arduino
debug_tool = blackmagic
debug_port = \\.\COM23

upload_protocol = blackmagic-jtag
upload_port = \\.\COM23

It definitely needs the \\.\ as the upload says port not found otherwise. COM23 seems to be the correct port as when I try and upload I get the error

Uploading .pioenvs\due\firmware.bin
Target voltage: 3.3V
Available Targets:
No. Att Driver
1      Atmel SAM3X
0x00080ae4 in USB_SendStringDescriptor(unsigned char const*, int) ()
Kill the program being debugged? (y or n) [answered Y; input not from terminal]
Error erasing flash with vFlashErase packet
target memory fault, section .text, range 0x80000 -- 0x82a14

I have disconnected the Due and reuploaded the Blink example using the Arduino IDE, so im not sure what program is being debugged at the moment?

#4

Ok, following the advice on another thread I tried adding debug_load_cmd = preload which has enabled some of the debugging functionality! I can enter debug mode and set a breakpoint. However, I still cannot upload using the bmp. While debugging, I dont seem to be able to manipulate variables and the watch variables dont seem to be updating.

#5

Check this out to get up and running:

I think that I’ve found there may be a firmware issue with the BMP for SAM3X8E chips, however I haven’t had time to spare toward debugging that effort. That is being tracking in this github issue. https://github.com/blacksphere/blackmagic/issues/414

#6

Hey!
Thanks very much for your hard work to find a solution! I will try it out and hopefully it will be successful. I plan on moving to the Zero or Feather for my next projects so hopefully that will run a bit smoother.