Solved
As I want to use the st-link of NUCLEO-L476RG board to program my other ARM-CortexM0 board and use SWD to program it. But it cannot successful on Keil? Errors show below
Peter BENSCHBest answer
ST Technical Moderator
September 30, 2021
First of all, you can use the ST-LINK to program or delete with it, but not any Cortex-M based target. Only STM32 from STMicroelectronics are supported, not e.g. your TN2115 from FusensMicro.
But even if you want to program / delete an STM32 as a target, you can only use the ST-LINK for one target at a time, in this case either for the main STM32 on the NUCLEO, or for an external STM32. In the latter case you have to remove the double jumper (named ST-LINK, directly next to the crystal) on the ST-LINK so that the SWD connection to the main STM32 does not interfere with the one to the external STM32.
Regards
/Peter
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