求助，我想把超声波测距的库函数代码改为寄存器的，但是中断处理EXTI9_5_IRQHandler进不去，库函数的代码和寄存器的代码都贴在下面，大家帮忙看一下

we12rt · 发表于 2015-5-10 16:59:27

这是库函数的代码

[mw_shl_code=c,true]#define TRIG_PORT GPIOC //TRIG #define ECHO_PORT GPIOC //ECHO #define TRIG_PIN GPIO_Pin_8 //TRIG #define ECHO_PIN GPIO_Pin_7 //ECHO float UltrasonicWave_Distance; //计算出的距离 /* * 函数名：UltrasonicWave_Configuration * 描述：超声波模块的初始化 * 输入：无 * 输出：无 */ void UltrasonicWave_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; EXTI_InitTypeDef EXTI_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable , ENABLE); //关闭jtag RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO, ENABLE); GPIO_InitStructure.GPIO_Pin = TRIG_PIN; //PC8接TRIG GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //设为推挽输出模式 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(TRIG_PORT, &GPIO_InitStructure); //初始化外设GPIO GPIO_InitStructure.GPIO_Pin = ECHO_PIN; //PC7接ECH0 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //设为输入 GPIO_Init(ECHO_PORT,&GPIO_InitStructure); //初始化GPIOA //GPIOC.7 中断线以及中断初始化配置 GPIO_EXTILineConfig(GPIO_PortSourceGPIOC,GPIO_PinSource7); EXTI_InitStructure.EXTI_Line=EXTI_Line7; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器 NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn; //使能按键所在的外部中断通道 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //抢占优先级2 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //子优先级2 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道 NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器 } void EXTI9_5_IRQHandler(void) { delay_us(10); //延时10us if(EXTI_GetITStatus(EXTI_Line7) != RESET) { TIM_SetCounter(TIM2,0); TIM_Cmd(TIM2, ENABLE); //开启时钟 while(GPIO_ReadInputDataBit(ECHO_PORT,ECHO_PIN)); //等待低电平 TIM_Cmd(TIM2, DISABLE); //定时器2失能 UltrasonicWave_Distance=TIM_GetCounter(TIM2)*5*34/200.0; //计算距离&&UltrasonicWave_Distance<150 if(UltrasonicWave_Distance>0) { printf("distance:%f cm",UltrasonicWave_Distance); } EXTI_ClearITPendingBit(EXTI_Line7); //清除EXTI7线路挂起位 } } /* * 函数名：UltrasonicWave_StartMeasure * 描述：开始测距，发送一个>10us的脉冲，然后测量返回的高电平时间 * 输入：无 * 输出：无 */ void UltrasonicWave_StartMeasure(void) { GPIO_SetBits(TRIG_PORT,TRIG_PIN); //送>10US的高电平?RIG_PORT,TRIG_PIN这两个在define中有? delay_us(20); //延时20US GPIO_ResetBits(TRIG_PORT,TRIG_PIN); }[/mw_shl_code]

下面是寄存器的代码

[mw_shl_code=c,true]void UltrasonicWave_Configuration(void) { RCC->APB2ENR|=1<<4; //使能PORTC时钟 JTAG_Set(JTAG_SWD_DISABLE);//关闭JTAG和SWD GPIOC->CRH&=0XFFFFFFF0; //PC8接TRIG GPIOC->CRH|=0X00000003; //设为推挽输出模式 GPIOC->ODR|=1<<8; //初始化外设GPIO GPIOC->CRL&=0X0FFFFFFF; //PC7接ECH0 GPIOC->CRL|=0X00000000; //设为输入 GPIOC->ODR|=1<<7; //初始化GPIOA //GPIOC.7 中断线以及中断初始化配置 Ex_NVIC_Config(GPIO_C,7,RTIR); //上升沿触发 MY_NVIC_Init(2,2,EXTI9_5_IRQChannel,1); //抢占2，子优先级2，组2 } void EXTI9_5_IRQHandler(void) { printf("distance:%f cm",1); delay_us(10); //延时10us TIM2->CNT = 0; TIM2->CR1 |= 0x0001; //开启时钟 while(GPIOC->IDR & 0x0080); //等待低电平 TIM2->CR1 &=0xFFFE; //定时器2失能 UltrasonicWave_Distance=(TIM2->CNT)*5*34/200.0; //计算距离&&UltrasonicWave_Distance<150 if(UltrasonicWave_Distance>0) { printf("distance:%f cm",UltrasonicWave_Distance); } EXTI->

R=1<<7; } /* * 函数名：UltrasonicWave_StartMeasure * 描述：开始测距，发送一个>10us的脉冲，然后测量返回的高电平时间 * 输入：无 * 输出：无 */ void UltrasonicWave_StartMeasure(void) { WAV8=1; //送>10US的高电平?RIG_PORT,TRIG_PIN这两个在define中有? delay_us(20); //延时20US WAV8=0; }[/mw_shl_code]