TIM updated callback

[HAL_GET_ANSWER]

I am using 4 TIMs for updated interrupts functions. in the main while loop, I will call start the timer. and if the timer reaches its full-period and call the callback function. A Flag will be setted in the callback function and print a timeout meassage. The problem I found is the timeout will be triggerred in every powered on. Everytime I click reset MCU, it will first enter the callback function and print the "timeout message". Why this will happen and how to avoid this?

Thanks all in advance!

  

[Sarra.S]

Hello @HAL_GET_ANSWER, welcome to ST Community, 

The callback is being fired automatically, as a test, you can reset the UIF flag in the SR register before calling the HAL_TIM_Base_Start_IT. 

Also, check this gotcha! 

I hope that helps!