JTAG debug

Question

I use jtag debugging m4 program, the following error, how should be resolved

Open On-Chip Debugger 0.10.0+dev-01124-gbfb41e6 (2018-11-16-15:23)

Licensed under GNU GPL v2

For bug reports, read

debug_level: 1

cortex_a interrupt mask on

cortex_a domain access control fixup on

3333

none separate

adapter speed: 5000 kHz

adapter_nsrst_assert_width: 200

adapter_nsrst_delay: 200

none srst_pulls_trst

srst_only srst_pulls_trst srst_gates_jtag srst_open_drain connect_deassert_srst

Error: Could not find MEM-AP to control the core

ap 0 selected, csw 0x10006000

Error: Target not examined yet

undefined debug reason 7 - target needs reset

Error: Target not examined yet

Error: Could not find MEM-AP to control the core

Error: Target not examined yet

embedded:startup.tcl:24: Error:

in procedure 'stm32mp15x.cpu2' called at file "embedded:startup.tcl", line 283

in procedure 'ocd_bouncer'

at file "embedded:startup.tcl", line 24

Error: Target not examined yet

AntonioST · Answer

Your message does not explain the environment you are using, so I try to guess it.

I believe you are running SystemWorkbench while on the STM32MP1 is running Linux

In this configuration, you cannot load the M4 firmware through JTAG/SWD, but you need to "ask" Linux on the board to load the FW on M4,

This is done through "Debug Configuration" in SystemWorkbench. See screenshot below

Please also notice that SystemWorkbench is currently obsoleted.

I suggest you to switch to CubeIDE, available on ST website

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