TIM3 dual IC in DMA mode issue - only one works

mikael239955_st · ‎2016-10-06

Posted on October 06, 2016 at 22:20

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mikael239955_st · ‎2016-10-06

Posted on October 06, 2016 at 23:49

Ok I just figured it out. I need to check for completion using HAL_TIM_IC_GetState().. function:

/* USER CODE BEGIN 2 */
HAL_TIM_IC_Start_DMA(&htim3, TIM_CHANNEL_3, risingEdges, 5);
while
(HAL_TIM_IC_GetState(&htim3) == HAL_TIM_STATE_BUSY);
HAL_TIM_IC_Start_DMA(&htim3, TIM_CHANNEL_4, fallingEdges, 5);
while
(HAL_TIM_IC_GetState(&htim3) == HAL_TIM_STATE_BUSY);
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
/* USER CODE END 2 */

Now terminal output shows: 40,77,112,149,184,221,256,293,328,365,0,0,0,0,0,0,0,0,0,0, which is alternating positive and negative edge captures as I intended 🙂

Walid FTITI_O · ‎2016-10-10

Posted on October 10, 2016 at 12:55

Hi stewart.mikael,

I see that you find out the missed routine.

Thank you for sharing you knowledge for the good of other users.

-Hannibal-