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STM32L4 + Timer IT + µs counter

Question asked by Ghada Dhibi on Apr 24, 2017
Latest reply on Apr 24, 2017 by Clive One

Hi All,


I'm using STM32L486RG microcontroler, And 1Wire EEPROM.


I have to use Timer to compute delays type ( delay for 5 µs to 500 µs).

And I'm asking on How to Re-configure Timer on it's interrupt callBack and restart it.


However, I was successfully able to disable the timer once IT callBack was generated. and I restarted it in my freeRTOS task,
I was able to visualize time from oscilloscope, and it was correct timing.


and now, I have to reduce more and more CPU charge by Restatring It on it's Interruption CallBack.

Below my IRQ handler Algorithm:

void TIM1_UP_TIM16_IRQHandler (void)
if(LL_TIM_IsActiveFlag_UPDATE(TIM1) == 1)
/* Clear the update interrupt flag*/
/* Disable the Timer*/

/* Reconfigure the Timer and restart*/
LL_TIM_SetAutoReload(TIM1, XXX); // Another Timer Period (depending on my 1Wire EEPROM state)



Using this method, Timing is not correct, and my eeprom is not working correctly.


Can you help me please ?


Best Regards.