谁有STM3F103C8T6的TIM4CH4的输入捕获程序

YXYG · 发表于 2018-5-17 10:40:38

我想用C8T6的PB9引脚计算一分钟之内的方波个数，然后用的开发板的捕获例程，改了引脚和寄存器定时器通道，然后用另一块最小系统输出周期为1s的方波测试，不知道哪里出问题了，总是出错，寄存器设置应该没错的，定时器中断函数我没改，有没有大神能告诉一声哪部分有问题
捕获程序TIM_ICInitTypeDef  TIM4_ICInitStructure;

void TIM4_Cap_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
   NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); //使能TIM4时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);  //使能GPIOB时钟

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_9;  //PB9 清除之前设置
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //PB9 输入
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_ResetBits(GPIOB,GPIO_Pin_0);    //PB9 下拉

//初始化定时器4 TIM4
TIM_TimeBaseStructure.TIM_Period = arr; //设定计数器自动重装值
TIM_TimeBaseStructure.TIM_Prescaler =psc; //预分频器
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位

//初始化TIM4输入捕获参数
TIM4_ICInitStructure.TIM_Channel = TIM_Channel_4; //CC4S=01 选择输入端 IC4映射到TI4上
    TIM4_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿捕获
    TIM4_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //映射到TI4上
    TIM4_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;    //配置输入分频,不分频
    TIM4_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置输入滤波器不滤波
    TIM_ICInit(TIM4, &TIM4_ICInitStructure);

//中断分组初始化
NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;  //TIM4中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;  //先占优先级2级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;  //从优先级0级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
NVIC_Init(&NVIC_InitStructure);  //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器

TIM_ITConfig(TIM4,TIM_IT_Update|TIM_IT_CC4,ENABLE);//允许更新中断 ,允许CC4IE捕获中断

   TIM_Cmd(TIM4,ENABLE ); //使能定时器4
}

u8  TIM4CH4_CAPTURE_STA=0; //输入捕获状态
u16 TIM4CH4_CAPTURE_VAL; //输入捕获值

//定时器4中断服务程序
void TIM4_IRQHandler(void)
{
if((TIM4CH4_CAPTURE_STA&0X80)==0)//还未成功捕获
{
if (TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET)

{
if(TIM4CH4_CAPTURE_STA&0X40)//已经捕获到高电平了
{
if((TIM4CH4_CAPTURE_STA&0X3F)==0X3F)//高电平太长了
{
TIM4CH4_CAPTURE_STA|=0X80;//标记成功捕获了一次
TIM4CH4_CAPTURE_VAL=0XFFFF;
}else TIM4CH4_CAPTURE_STA++;
}
}
if (TIM_GetITStatus(TIM4, TIM_IT_CC4) != RESET)//捕获1发生捕获事件
{
if(TIM4CH4_CAPTURE_STA&0X40) //捕获到一个下降沿
{
TIM4CH4_CAPTURE_STA|=0X80; //标记成功捕获到一次高电平脉宽
TIM4CH4_CAPTURE_VAL=TIM_GetCapture1(TIM4);
   TIM_OC1PolarityConfig(TIM4,TIM_ICPolarity_Rising); //CC1P=0 设置为上升沿捕获
}else    //还未开始,第一次捕获上升沿
{
TIM4CH4_CAPTURE_STA=0; //清空
TIM4CH4_CAPTURE_VAL=0;
     TIM_SetCounter(TIM4,0);
TIM4CH4_CAPTURE_STA|=0X40; //标记捕获到了上升沿
   TIM_OC1PolarityConfig(TIM4,TIM_ICPolarity_Falling); //CC1P=1 设置为下降沿捕获
}
}
}

TIM_ClearITPendingBit(TIM4, TIM_IT_CC4|TIM_IT_Update); //清除中断标志位

}
主程序
extern u8  TIM4CH4_CAPTURE_STA; //输入捕获状态

extern u16 TIM4CH4_CAPTURE_VAL; //输入捕获值
int main(void)
{
// u32 temp=0;
short time=0;
delay_init();            //延时函数初始化
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);    //设置NVIC中断分组2:2位抢占优先级，2位响应优先级
uart_init(115200);    //串口初始化为115200

while(1)
{
TIM4_Cap_Init(599999,7199); //以10Khz的频率计数
   while(1)
{
delay_ms(10);
if(TIM4CH4_CAPTURE_STA&0X80)//成功捕获到了一次上升沿
{
time++;

// USART_SendData(USART1, temp);
   while(USART_GetFlagStatus(USART1,USART_FLAG_TC)!=SET)
TIM4CH4_CAPTURE_STA=0;//开启下一次捕获
}
}printf("HEART:%d\r\n",time);//打印心率
}