/**
* @brief Configure COMP1 and COMP2 with interrupt
* @param None
* @retval None
*/
void COMP_Config(void)
{
COMP_InitTypeDef COMP_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* GPIOB Peripheral clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
/* Configure PB5 in analog closes the switch GR6-2: PB5 is connected to COMP2 non inverting input */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* COMP Peripheral clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_COMP, ENABLE);
/* COMP2 Init: COMP2 is enabled as soon as inverting input is selected */
/* In this example, the lower threshold is set to VREFINT/4 ~ 1.22 / 4 ~ 0.305 V
but can be changed to other available possibilities */
COMP_InitStructure.COMP_InvertingInput = COMP_InvertingInput_1_4VREFINT;
COMP_InitStructure.COMP_OutputSelect = COMP_OutputSelect_None;
COMP_InitStructure.COMP_Speed = COMP_Speed_Slow;
COMP_Init(&COMP_InitStructure);
/* Enable Window mode */
COMP_WindowCmd(ENABLE);
/* Enable COMP1: the higher threshold is set to VREFINT ~ 1.22 V */
COMP_Cmd(ENABLE);
/* Configure EXTI Line 21 in interrupt mode */
EXTI_InitStructure.EXTI_Line = EXTI_Line21;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Configure EXTI Line 22 in interrupt mode */
EXTI_InitStructure.EXTI_Line = EXTI_Line22;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Clear EXTI21 line */
EXTI_ClearITPendingBit(EXTI_Line21);
/* Clear EXTI22 line */
EXTI_ClearITPendingBit(EXTI_Line22);
/* Configure COMP IRQ */
NVIC_InitStructure.NVIC_IRQChannel = COMP_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/**
* @brief Configure COMP1 and COMP2 with interrupt
* @param None
* @retval None
*/
static void COMP_Config(void)
{
COMP_InitTypeDef COMP_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
/* GPIOA Peripheral clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/* Configure PA1: PA1 is used as COMP1 and COMP2 non inveting input */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* COMP Peripheral clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
/* COMP1 Init: the higher threshold is set to VREFINT ~ 1.22V
but can be changed to other available possibilities */
COMP_StructInit(&COMP_InitStructure);
COMP_InitStructure.COMP_InvertingInput = COMP_InvertingInput_VREFINT;
COMP_InitStructure.COMP_Output = COMP_Output_None;
COMP_InitStructure.COMP_Mode = COMP_Mode_LowPower;
COMP_InitStructure.COMP_Hysteresis = COMP_Hysteresis_High;
COMP_Init(COMP_Selection_COMP1, &COMP_InitStructure);
/* COMP2 Init: the lower threshold is set to VREFINT/4 ~ 1.22 / 4 ~ 0.305 V
but can be changed to other available possibilities */
COMP_StructInit(&COMP_InitStructure);
COMP_InitStructure.COMP_InvertingInput = COMP_InvertingInput_1_4VREFINT;
COMP_InitStructure.COMP_Output = COMP_Output_None;
COMP_InitStructure.COMP_Mode = COMP_Mode_LowPower;
COMP_InitStructure.COMP_Hysteresis = COMP_Hysteresis_High;
COMP_Init(COMP_Selection_COMP2, &COMP_InitStructure);
/* Enable Window mode */
COMP_WindowCmd(ENABLE);
/* Enable COMP1: the higher threshold is set to VREFINT ~ 1.22 V */
COMP_Cmd(COMP_Selection_COMP1, ENABLE);
/* Enable COMP2: the lower threshold is set to VREFINT/4 ~ 0.305 V */
COMP_Cmd(COMP_Selection_COMP2, ENABLE);
/* Configure EXTI Line 21 in interrupt mode */
EXTI_InitStructure.EXTI_Line = EXTI_Line21;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Configure EXTI Line 22 in interrupt mode */
EXTI_InitStructure.EXTI_Line = EXTI_Line22;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Clear EXTI21 line */
EXTI_ClearITPendingBit(EXTI_Line21);
/* Clear EXTI22 line */
EXTI_ClearITPendingBit(EXTI_Line22);
/* Configure COMP IRQ */
NVIC_InitStructure.NVIC_IRQChannel = ADC1_COMP_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
