Please tell me how to program an external microcontroller using the nucleo-h743zi2 board

[waclawek.jan]

The Nucleo64 board has a Using ST-LINK/V2-1 to program and debug an external STM32 application subchapter in its User Manual. I am lazy to get your Nucleo's UM, but isn't there a similar chapter in it?

JW

[Andreas Bolsch]

While it's easy to use the integrated ST-Link-V2 on Nucleos for an external target (and vice versa), for some reason that's not possible for the Nucleos with embedded ST-Link-V3: Apparently there a no jumpers or solder bridges to isolate the target MCU from the integrated ST-Link ... One would have to cut the PCB traces (if accessible). Maybe the reason for this change is availabilty of a rather small and cheap ST-Link-V3Mini?

[Brian Kling]

This response provided by @Community member​ on a duplicate post by @Viacheslav​ (now deleted).

"If you want to implement a JTAG programmer the best place to look for information is the OpenOCD project. General idea is to use the SPI port on the STM32 to line up with the JTAG pins. If you look at the schematics for some of the ST Discovery boards you'll see examples of an STM32L103 being used as a JTAG controller.

Jack Peacock"