debug bare metal software on the Raspberry Pi 4 using Arm develop stdui by dstream

Hi Danny

My name is Stephen and I work at Arm.

There is an example for Raspberry Pi 3 provided in the Arm DS examples (named "Raspberry-Pi-3_RAM" in Bare-metal_examples_Armv8.zip) that I would expect to work similarly for Raspberry Pi 4.

In the Debug Configurations view, have you selected the configdb for Raspberry Pi 4 that is provided with Arm DS, or have you created your own?

Please can you check that the jumper wires to connect the JTAG signals between DSTREAM/ULINK and Raspberry Pi are as described in the readme for Raspberry-Pi-3_RAM, and that config.txt contains just these lines:
arm_64bit=1
kernel_old=1
enable_jtag_gpio=1
disable_commandline_tags=1
            
I will try to verify bare-metal debug on Raspberry Pi 4 myself in the next day or two.

Stephen
     

hi Stephen:

thanks you very much

1. I have selected the configdb for Rasperrby Pi4

2. my config.txt contains  arm_64bit=1 and enable_jtag_gpio=1, because my code is running at 0x8000, so i do not cantains kernel_old=1 and disable_commandline_tags=1

3. I put my program in that raspberry pi and it works

4、I use openocd and jlink on ubuntu is debuggable

hi Stephen:

thanks you very much

I found the reason, I didn't connect the ground of the raspberry pi4 and dstream,
I thought the common ground was fine, only connect the ground of the raspberry pi4 and the computer.