Stm32h503CBT6 doesnt start but can be programed

[transistor]

Hello when i added PWM on TIM1 channel 2 the all code stopped working i tried uploading code by stm32programmer but it doesnt help im using Stm32h503CBT6

[AScha.3]

Hi,

so you wrote something very strange in your prog....

show source.

use </>  to put code here.

[transistor]

i already solved this problem but i got a new, when i reconnected stm32 to power it doesnt want to run code and when i try to connect i get this error 

[Imen.D]

Hello @transistor ,

I recommend you this article : How to solve connection errors when connecting and programming the STM32 target board. This will help you to fix such errors encountered when connecting the STM32 target board to your computer.