对射式红外传感器计数器实现

BSP/CountSensor.c

@@ -0,0 +1,44 @@
+#include "stm32f10x.h"
+
+uint16_t CountSensor_Count = 0;
+
+void CountSensor_Init(void) {
+    // 初始化Gpio口
+    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
+    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
+    GPIO_InitTypeDef GPIO_InitStructure;
+    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
+    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
+    GPIO_Init(GPIOB, &GPIO_InitStructure);
+
+    // 初始化exit
+    GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource14);
+    EXTI_InitTypeDef EXTI_InitStructure;
+    EXTI_InitStructure.EXTI_Line = EXTI_Line14;
+    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
+    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
+    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
+    EXTI_Init(&EXTI_InitStructure);
+
+    // 初始化nvic
+    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
+    NVIC_InitTypeDef NVIC_InitStructure;
+    NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
+    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
+    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
+    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
+    NVIC_Init(&NVIC_InitStructure);
+}
+
+
+void EXTI15_10_IRQHandler(void)  {
+    if (EXTI_GetITStatus(EXTI_Line14) == SET) {
+        CountSensor_Count++;
+        EXTI_ClearITPendingBit(EXTI_Line14);
+    }
+}
+
+uint16_t CountSensor_GetCount(void) {
+    return CountSensor_Count;
+}