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No Cortex-M SW Device Found

mamareza

Hi friends.

I have a blue pill discovery board (STM32F103C8) which I programmed several times but now I face with this error message.

I made CubeMX file which create a file in Keil and I write code in it.

I understood when I made CubeMX file, I forgot to select serial wire for programming microcontroller.

Now I can not program and I tried it by reset key in board.

Anyone can help me?