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STM32F4-discovery timer question

Question asked by carrier.michael on Nov 25, 2013
Latest reply on Nov 25, 2013 by Clive One
I am using a discovery kit to evaluate some timer functions. I need to time a data packet send/receive. So, I would like to use one of the timers for this. My plan is to send the last byte of the data packet out a USART and then start a 40ms timer. In the meantime I have to continue processing other data so I can't just simply delay for "some ms" waiting for a response from the packet just sent. As soon as I enable TIM2 interrupts in the NVIC the
TIM_IT_Update interrupt fires. Is this normal?