Custom board (stm32mp1) JTAG connecting issue

asadullah4571 · ‎2024-10-08

Hi
In my custom board (stm32mp157F) i added the JTAG , i try to connect JTAG for flashing the firmware into the M4 processor, i change the boot pins as Engineering mode, but not connected to cub programmer as well as cube IDE.

i attached the screenshot of the Schematic diagram of JTAG.
please let me know where i am missing.

PatrickF · ‎2024-10-08

Hi @asadullah4571 ,

On STM32MPx MPUs products, unlike STM32 MCUs, the JTAG/SWD cannot be used for flashing.

Only USB or UART could be used with CubeProgrammer.

Furthermore, note that there is no embedded Flash and Cortex-M4 only run from internal SRAMs loaded by Cortex-A7 (uBoot or Linux) during runtime.

JTAG/SWD is only used for debug purpose. CubeIDE could be used to debug Cortex-M4 FW in either production mode (i.e. Linux up and running) or development boot (aka Engineering boot).
https://wiki.st.com/stm32mpu/wiki/STM32CubeIDE#Arm-C2-AE_Cortex-C2-AE-M_debug_on_STM32_MPU_device

Regards.

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