利用STM32外部中断和霍尔传感器写的电机测速程序求帮助 -

#include "exti.h"
#include "stm32f10x.h"
#include "delay.h"
#include "led.h"
#include "sys.h"
u16 k1 = 0;
u8 k2 = 0;
void EXTIX_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //初始化IO口
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_1;
GPIO_Init(GPIOF,&GPIO_InitStructure);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO|RCC_APB2Periph_GPIOF, ENABLE); //开启IO口复用时钟
GPIO_EXTILineConfig(GPIO_PortSourceGPIOF,GPIO_PinSource2); // GPIOB2 映射到中断线2
GPIO_EXTILineConfig(GPIO_PortSourceGPIOF,GPIO_PinSource1); // GPIOB1 映射到中断线1
EXTI_InitStructure.EXTI_Line = EXTI_Line2; //中断线2
EXTI_InitStructure.EXTI_LineCmd = ENABLE; //外部中断使能
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; //模式中断
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //下降沿
EXTI_Init(&EXTI_InitStructure); //设定参数初始化外部中断
EXTI_InitStructure.EXTI_Line = EXTI_Line1; //中断线1
EXTI_InitStructure.EXTI_LineCmd = ENABLE; //外部中断使能
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; //模式中断
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //下降沿
EXTI_Init(&EXTI_InitStructure); //设定参数初始化外部中断
NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn; //通道外部中断2
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //抢占优先级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //响应优先级
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn; //通道外部中断1
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //抢占优先级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //响应优先级
NVIC_Init(&NVIC_InitStructure);
}
void EXTI2_IRQHandler(void) //外部中断服务函数
{
// k2++;
// if(k2 >= 13)
// {
// k2 = 0;
k1++;
// }
EXTI_ClearITPendingBit(EXTI_Line2); //清除中断标志位
}
void EXTI1_IRQHandler(void) //外部中断服务函数
{
k1 = 0;
EXTI_ClearITPendingBit(EXTI_Line1); //清除中断标志位
}

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