Loading u‐boot without an ICE debugger (USB Debug Agent) - analogdevicesinc/lnxdsp-adi-meta GitHub Wiki

If a dedicated ICE debugger is not available, it is still possible to load firmware into memory.

Unsupported feature set

NOTE: Although possible, it is always recommended to use a dedicated ICE-1000/2000 debugger for faster and more flexible debugging.

The following regularly used openOCD feature set may not work as intended/have undefined behaviours:

  • flashing QSPI
  • hard reset
  • Loading successive firmware files

Getting started

  1. Switch board to bootmode 0, press RESET
  2. Set all JTAG interface switches to the required configuration

NOTE: This will disable the JTAG interface used by the ICE debugger.

  1. Connect the USB Debug Agent on the carrier board with the host.
  2. Start openOCD with the adi-debugagent interface
$sdk_usr/bin/openocd -f $sdk_usr/share/openocd/scripts/interface/adi-dbgagent.cfg  -f $sdk_usr/share/openocd/scripts/board/ev-sc598-som.cfg -c init -c reset -c halt

where sdk_usr is the SDK installation's usr directory and may correspond to something like the following

/opt/adi-distro-glibc/3.1.0/sysroots/x86_64-adi_glibc_sdk-linux/usr/

NOTE: Replace the target/board as required by the hardware

  1. Connect gdb to openOCD
$sdk_usr/bin/aarch64-adi_glibc-linux/aarch64-adi_glibc-linux-gdb -ex "tar ext :3333"

Loading Firmware

Connect GDB to openOCD

 (gdb) load u-boot-proper-sc598-som-ezkit.elf

 (gdb) c

Soft reset via RCU

 (gdb) set *0x3108C000=0x1

Sources:

[1] https://www.analog.com/media/en/technical-documentation/user-guides/ev-somcrr-ezkit-manual.pdf (See table 3-5)

[2] https://www.analog.com/media/en/technical-documentation/user-guides/ev-somcrr-ezlite_manual.pdf (See table 3-3)