STM32:外部中断控制旋转编码器并计次

#include "stm32f10x.h"                  // Device header
#include "Delay.h"
#include "OLED.h"
#include "Encoder.h"
int16_t Num;
int main(void)
{
    OLED_Init();    
    OLED_ShowString(1,1,"Num:");
    Encoder_Init();
    while(1)
    {
        Num+=Encoder_Get();
        OLED_ShowNum(2,1,Num,4);
    }
}

#include "stm32f10x.h"                  // Device header
int16_t Encoder_Count;
void Encoder_Init(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
    GPIO_InitTypeDef GPIO_InitStruct;
    GPIO_InitStruct.GPIO_Mode=GPIO_Mode_IPU;
    GPIO_InitStruct.GPIO_Pin=GPIO_Pin_0|GPIO_Pin_1;
    GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
    GPIO_Init(GPIOB,&GPIO_InitStruct);
    GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource0);
    GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource1);
    EXTI_InitTypeDef EXTI_InitStruct;
    EXTI_InitStruct.EXTI_Line=EXTI_Line0|EXTI_Line1;
    EXTI_InitStruct.EXTI_LineCmd=ENABLE;
    EXTI_InitStruct.EXTI_Mode=EXTI_Mode_Interrupt;
    EXTI_InitStruct.EXTI_Trigger=EXTI_Trigger_Falling;
    EXTI_Init(&EXTI_InitStruct);
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
    NVIC_InitTypeDef NVIC_InitStruct;
    NVIC_InitStruct.NVIC_IRQChannel=EXTI0_IRQn;
    NVIC_InitStruct.NVIC_IRQChannelCmd=ENABLE;
    NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority=1;
    NVIC_InitStruct.NVIC_IRQChannelSubPriority=1;
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
    NVIC_Init(&NVIC_InitStruct);
    NVIC_InitStruct.NVIC_IRQChannel=EXTI1_IRQn;
    NVIC_InitStruct.NVIC_IRQChannelCmd=ENABLE;
    NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority=1;
    NVIC_InitStruct.NVIC_IRQChannelSubPriority=2;
    NVIC_Init(&NVIC_InitStruct);
}
void EXTI0_IRQHandler(void)
{
    if(EXTI_GetITStatus(EXTI_Line0)==SET)
    {
        if (GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_0) == 0)
        {
            if (GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_1) == 0)
            {
                Encoder_Count-- ;
            }
        }
        EXTI_ClearITPendingBit(EXTI_Line0);
    }
}
void EXTI1_IRQHandler(void)
{
    if(EXTI_GetITStatus(EXTI_Line1)==SET)
    {
        if (GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_1) == 0)
        {
            if (GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_0) == 0)
            {
                Encoder_Count++ ;
            }
        }
        EXTI_ClearITPendingBit(EXTI_Line0);
    }
}
int16_t Encoder_Get(void)
{
    int16_t Temp;
    Temp = Encoder_Count;
    Encoder_Count = 0;
    return Temp;
}

#ifndef  __COUNT_SENSOR_H
#define  __COUNT_SENSOR_H
int16_t Encoder_Get(void);
//void EXTI1_IRQHandler(void);
//void EXTI0_IRQHandler(void);
void Encoder_Init(void);
#endif