How to trigger an ADC using the PWM timer at the beginning of the period.

Hello @NSemrHomeInit​ ,

Generally with the while loop, you can do the polling technique.

Other possibility is to use the ADC EOC interrupt.

Here is one of example in the HAL within STM32CubeF4: STM32Cube_FW_F4_V1.25.2\Projects\STM324x9I_EVAL\Examples\ADC\ADC_RegularConversion_Polling

 /*##-3- Start the conversion process #######################################*/ 
 if(HAL_ADC_Start(&AdcHandle) != HAL_OK)
 {
 /* Start Conversation Error */
 Error_Handler();
 }
 
 /*##-4- Wait for the end of conversion #####################################*/ 
 /* Before starting a new conversion, you need to check the current state of 
 the peripheral; if it’s busy you need to wait for the end of current
 conversion before starting a new one.
 For simplicity reasons, this example is just waiting till the end of the 
 conversion, but application may perform other tasks while conversion 
 operation is ongoing. */
 HAL_ADC_PollForConversion(&AdcHandle, 10);
 
 /* Check if the continuous conversion of regular channel is finished */
 if((HAL_ADC_GetState(&AdcHandle) & HAL_ADC_STATE_EOC_REG) == HAL_ADC_STATE_EOC_REG)
 {
 /*##-5- Get the converted value of regular channel ######################*/
 uhADCxConvertedValue = HAL_ADC_GetValue(&AdcHandle);
 }
 
 /* Infinite loop */
 while(1)
 {
 }

I hope this helps !

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Imen