/**
* @brief Configures COMP2: PA3 as COMP2 non inverting input
* VREFINT as COMP2 inverting input
* and COMP2 output to TIM2 BKIN.
* @param None
* @retval None
*/
void COMP_Config(void)
{
COMP_InitTypeDef COMP_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
/* GPIOA Peripheral clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/* Configure PA3 in analog mode: PA3 is connected to COMP2 non inverting input */
GPIO_StructInit(&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
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);
/* COMP2 config */
COMP_StructInit(&COMP_InitStructure);
COMP_InitStructure.COMP_InvertingInput = COMP_InvertingInput_VREFINT;
COMP_InitStructure.COMP_Output = COMP_Output_TIM1BKIN;
COMP_InitStructure.COMP_Hysteresis = COMP_Hysteresis_No;
COMP_InitStructure.COMP_Mode = COMP_Mode_UltraLowPower;
COMP_InitStructure.COMP_OutputPol = COMP_OutputPol_NonInverted;
COMP_Init(COMP_Selection_COMP2, &COMP_InitStructure);
/* Enable COMP2 */
COMP_Cmd(COMP_Selection_COMP2, ENABLE);
}
/**
* @brief Configures COMP1: DAC channel 1 to COMP1 inverting input
* and COMP1 output to TIM2 IC4.
* @param None
* @retval None
*/
void COMP_Config(void)
{
/* Init Structure definition */
COMP_InitTypeDef COMP_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
/* GPIOA Peripheral clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/* Configure PA1: PA1 is used as COMP1 non inveting input */
GPIO_StructInit(&GPIO_InitStructure);
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: DAC1 output is used COMP1 inverting input */
COMP_StructInit(&COMP_InitStructure);
COMP_InitStructure.COMP_InvertingInput = COMP_InvertingInput_DAC1;
/* Redirect COMP1 output to TIM2 Input capture 4 */
COMP_InitStructure.COMP_Output = COMP_Output_TIM2IC4;
COMP_InitStructure.COMP_Mode = COMP_Mode_HighSpeed;
COMP_InitStructure.COMP_Hysteresis = COMP_Hysteresis_No;
COMP_Init(COMP_Selection_COMP1, &COMP_InitStructure);
/* Enable COMP1 */
COMP_Cmd(COMP_Selection_COMP1, ENABLE);
}
void PowerMonitor_Init(void) {
uint32_t temp32u;
COMP_InitTypeDef COMP_InitStructure;
COMP_CVRefInitTypeDef COMP_CVRefInitStructure;
PORT_InitTypeDef PORT_InitStructure;
COMP_StructInit(&COMP_InitStructure);
COMP_InitStructure.COMP_PlusInputSource = COMP_PlusInput_CVREF;
COMP_InitStructure.COMP_MinusInputSource = COMP_MinusInput_IN1;
COMP_Init(&COMP_InitStructure);
COMP_CVRefStructInit(&COMP_CVRefInitStructure);
COMP_CVRefInitStructure.COMP_CVRefSource = COMP_CVREF_SOURCE_AVdd;
COMP_CVRefInitStructure.COMP_CVRefRange = COMP_CVREF_RANGE_Up;
COMP_CVRefInitStructure.COMP_CVRefScale = COMP_CVREF_SCALE_14_div_32;
COMP_CVRefInit(&COMP_CVRefInitStructure);
COMP_Cmd(ENABLE);
COMP_CVRefCmd(ENABLE);
while(COMP_GetCfgFlagStatus(COMP_CFG_FLAG_READY) != SET);
// Setup GPIO
PORT_StructInit(&PORT_InitStructure);
PORT_InitStructure.PORT_Pin = (1 << POWER_MONITOR_PIN);
PORT_Init(POWER_MONITOR_PORT, &PORT_InitStructure);
// Wait until power supply is stable
temp32u = DWT_StartDelayUs(50000);
while (DWT_DelayInProgress(temp32u)) {
if (COMP_GetFlagStatus(COMP_STATUS_FLAG_SY) == SET) {
// False triggering - restart delay
temp32u = DWT_StartDelayUs(50000);
}
}
// Read and clear comparator result latch
COMP_GetResultLatch();
COMP_ITConfig(ENABLE);
NVIC_EnableIRQ(COMPARATOR_IRQn);
}
/**
* @brief Configures COMP1: DAC channel 1 to COMP1 inverting input
* and COMP1 output to TIM2 IC4.
* @param None
* @retval None
*/
static void COMP_Config(void)
{
/* Init Structure definition */
COMP_InitTypeDef COMP_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
/* GPIOA Peripheral clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/* Init GPIO Init Structure */
GPIO_StructInit(&GPIO_InitStructure);
/* Configure PA1: PA1 is used as COMP1 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);
/* Init COMP init struct */
COMP_StructInit(&COMP_InitStructure);
/* COMP1 Init: PA1 is used as COMP1 non-inverting input */
COMP_InitStructure.COMP_NonInvertingInput = COMP_NonInvertingInput_IO1;
/* DAC1 output is as used COMP1 inverting input */
COMP_InitStructure.COMP_InvertingInput = COMP_InvertingInput_DAC1;
/* Redirect COMP1 output to TIM2 Input capture 4 */
COMP_InitStructure.COMP_Output = COMP_Output_TIM2IC4;
COMP_InitStructure.COMP_OutputPol = COMP_OutputPol_NonInverted;
COMP_InitStructure.COMP_BlankingSrce = COMP_BlankingSrce_None;
COMP_InitStructure.COMP_Hysteresis = COMP_Hysteresis_High;
COMP_InitStructure.COMP_Mode = COMP_Mode_UltraLowPower;
COMP_Init(COMP_Selection_COMP1, &COMP_InitStructure);
/* Enable COMP1 */
COMP_Cmd(COMP_Selection_COMP1, ENABLE);
}
/**
* @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);
}
