项目：TIM8输入捕获+TIM8更新计次数。为什么进不了更新中断？

15861845402 · 发表于 2018-1-11 23:46:43

TIM8输入捕获+TIM8更新计次数。为什么进不了更新中断？非常郁闷！请大神帮忙。
程序如下：
主程序：
#include "led.h"
#include "delay.h"
#include "sys.h"
#include "usart.h"
#include "TIM8_20180111.h"
extern u16  TIM8CH1_CAPTURE_STA;
int main(void)
{

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
LED_Init();
TIM8_Cap_Init(0XFFFF,72-1);
   while(1)
{
LED0=!LED0;
delay_ms(500);
}

}

子程序：
#include "TIM8_20180111.h"
#include "led.h"
#include "usart.h"
//////////////////////////////////////////////////////////////////////////////////

/////定时器8通道1输入捕获配置

TIM_ICInitTypeDef  TIM8_ICInitStructure;

void TIM8_Cap_Init(u16 arr,u16 psc)//2018011 TIM8  普通输入捕获模式CH1 PC6
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
   NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8, ENABLE); //使能TIM8时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);  //使能GPIOC时钟//PC6

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_6;  //PC6
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;  //输入  //PC6
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_ResetBits(GPIOC,GPIO_Pin_6);    //PC6

//初始化定时器8 TIM8
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(TIM8, &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TIM8输入捕获参数
TIM8_ICInitStructure.TIM_Channel = TIM_Channel_1; //CC1S=01 选择输入端 IC1映射到TI1上
    TIM8_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿捕获
    TIM8_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //映射到TI1上
    TIM8_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;    //配置输入分频,不分频
    TIM8_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置输入滤波器不滤波
    TIM_ICInit(TIM8, &TIM8_ICInitStructure);

//中断分组初始化
NVIC_InitStructure.NVIC_IRQChannel = TIM8_UP_IRQn;  //TIM3中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  //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_SetCounter(TIM8,0);
   TIM_ITConfig(TIM8,TIM8_UP_IRQn,ENABLE);//允许中断 ,允许CC1IE捕获中断
      TIM_ClearFlag(TIM8, TIM_FLAG_Update);//20180101
TIM_Cmd(TIM8,ENABLE ); //使能定时器
}

u16  TIM8CH1_CAPTURE_STA; //输入捕获状态

void TIM8_UP_IRQHandler (void)//20180111 普通定时器TIMER5改TIMER8  TIM8_UP_IRQHandler|TIM8_CC_IRQHandler
{

if (TIM_GetITStatus(TIM8, TIM_IT_Update) != RESET)

{
TIM_ClearITPendingBit(TIM8, TIM_IT_Update); //20171228
TIM8CH1_CAPTURE_STA++;
      LED1=!LED1;
if((TIM8CH1_CAPTURE_STA&0X3FFF)==0X000A)
{
      LED1=!LED1;
TIM8CH1_CAPTURE_STA=0;
}
}
}

NNYY · 发表于 2018-6-12 11:27:15

NVIC_InitStructure.NVIC_IRQChannel = TIM8_UP_IRQn; //TIM3中断
改为： NVIC_InitStructure.NVIC_IRQChannel = TIM8_CC_IRQn;

函数名void TIM8_UP_IRQHandler (void)
改为：void TIM8_CC_IRQHandler (void)