Electrical – Program not running on STM32F4 after disconnect it from PC

programmingstm32stm32cubemxstm32f4stm32f4-discovery

I developed a program on STM32F4 using keil uV on windows 10, it works perfectly when the target is powered by the computer even after i stop the debugging.
Normally after downloading the program in the flash memory it will run automatically when the target became powered by any source of energy.
I can't figure why it doesn't work in my case.

Best Answer

When the chip does not start executing on power-on-reset it can have two causes:

  • The chip starts in bootloader mode because the boot selection pins have the wrong voltage at powerup.
  • Your program is not linked correctly. In other words, it's in the wrong part of flash. (this is unlikely when building from examples)
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