I can successfully comparating ( My boards' vref ) VS( output voltage )
but later I want to set up voltage by potentiometer and comparating it by output voltage
in other words, I want to Comparator Compare
(Other voltage output in my circuit) vs (Another voltage output in fields)
and finally I want to use this comparator in stop mode & make interrupt (I already made it)
in that case, what should I put in my comparator code & HAL options ?
I put my configuration codes. thank a lot.
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this is my code about comparating VREF vs output port(PA3)
static void MX_COMP2_Init(void)
{
hcomp2.Instance = COMP2;
hcomp2.Init.NonInvertingInput = COMP_INPUT_PLUS_IO1; // +PA3
hcomp2.Init.InvertingInput = COMP_INPUT_MINUS_3_4VREFINT; //-VREF, 0.8v (0.825v)
hcomp2.Init.LPTIMConnection = COMP_LPTIMCONNECTION_IN1_ENABLED;
hcomp2.Init.OutputPol = COMP_OUTPUTPOL_NONINVERTED ;
hcomp2.Init.Mode = COMP_POWERMODE_ULTRALOWPOWER;
hcomp2.Init.WindowMode = COMP_WINDOWMODE_DISABLE;
hcomp2.Init.TriggerMode = COMP_TRIGGERMODE_IT_RISING;
if (HAL_COMP_Init(&hcomp2) != HAL_OK)
{
Error_Handler();
}
if(HAL_COMP_Start_IT(&hcomp2) != HAL_OK){
while(1){
}
}
HAL_COMPEx_EnableVREFINT();
}
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This is my msp code
void HAL_COMP_MspInit(COMP_HandleTypeDef* hcomp)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(hcomp->Instance==COMP2)
{
/* USER CODE BEGIN COMP2_MspInit 0 */
/* USER CODE END COMP2_MspInit 0 */
__HAL_RCC_GPIOB_CLK_ENABLE();
/**COMP2 GPIO Configuration
PB4 ------> COMP2_INP
*/
GPIO_InitStruct.Pin = GPIO_PIN_4;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* COMP2 interrupt Init */
HAL_NVIC_SetPriority(ADC1_COMP_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(ADC1_COMP_IRQn);
/* USER CODE BEGIN COMP2_MspInit 1 */
/* USER CODE END COMP2_MspInit 1 */
}
}
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Thanks for read
