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

danny2022

i use ARM develop studio 2021.2,  debug by dstream. 

when i connect the rasperry PI4 .  it report this error message:

Unable to stop device Cortex-A72_0
Cannot attain state requested.
Unable to stop device Cortex-A72_0

config.txt

[pi4]
kernel=loop.bin

[all]
arm_64bit=1 #enable 64bit image
enable_uart=1 #enable pl uart
uart_2ndstage=1 #enable FW debug info

enable_jtag_gpio=1
gpio=22-27=a4
init_uart_clock=48000000
init_uart_baud=115200
#kernel_old=1 # if we set it, the image will be load at 0x0, otherwise the 64bit image will be load on 0x80000
#disable_commandline_tags=1 #Fix me, when set it, the image will be load on 0x0 ?

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