/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32l1xx_xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32l1xx.c file
*/
/* Initialize LED1 mounted on STM32L1XX-EVAL board */
STM_EVAL_LEDInit(LED1);
/******************** comparator COMP1 configuration ************************/
#ifdef USE_STM32L152_EVAL
/* GPIOB Peripheral clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
/* Configure PB12 in analog mode */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOB, &GPIO_InitStructure);
#elif USE_STM32L152D_EVAL
/* GPIOF Peripheral clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOF, ENABLE);
/* Configure PF10 in analog mode */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOF, &GPIO_InitStructure);
#endif
/* COMP Peripheral clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_COMP, ENABLE);
/* Enable the Comparator 1 */
COMP_Cmd(ENABLE);
/* Enable the switch control mode */
SYSCFG_RISwitchControlModeCmd(ENABLE);
/* Close the ADC analog switch VCOMP */
SYSCFG_RIIOSwitchConfig(RI_IOSwitch_VCOMP, ENABLE);
#ifdef USE_STM32L152_EVAL
/* Close the I/O analog switch number 18 */
SYSCFG_RIIOSwitchConfig(RI_IOSwitch_CH18, ENABLE);
#elif USE_STM32L152D_EVAL
/* Close the I/O analog switch number 31 */
SYSCFG_RIIOSwitchConfig(RI_IOSwitch_CH31, ENABLE);
#endif
/* Configure and enable EXTI21 */
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 and enable COMP interrupt */
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);
while (1)
{
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
void COMP_Example(void) {
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32l1xx_xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32l1xx.c file
*/
/* Initialize LED1 mounted on STM32L1XX-EVAL board */
GPIO_InitTypeDef GPIO_InitStructure;
/* GPIOB Periph clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
/* Configure PD0 and PD1 or PD3 and PD7 in output pushpull mode */
GPIO_InitStructure.GPIO_Pin = LD_GREEN_GPIO_PIN | LD_BLUE_GPIO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/******************** comparator COMP1 configuration ************************/
/* GPIOB Peripheral clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
/* Configure PB12 in analog mode */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
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);
/* Enable the Comparator 1 */
COMP_Cmd(ENABLE);
/* Enable the switch control mode */
SYSCFG_RISwitchControlModeCmd(ENABLE);
/* Close the ADC analog switch VCOMP */
SYSCFG_RIIOSwitchConfig(RI_IOSwitch_VCOMP, ENABLE);
/* Close the I/O analog switch number 18 */
SYSCFG_RIIOSwitchConfig(RI_IOSwitch_CH18, ENABLE);
/* Configure and enable EXTI21 */
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 and enable COMP interrupt */
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);
while (1) {
}
}
