捕获输入实验，可以正常捕获，但是pwm不能输出，DS0亮不起来，求解？

六画玄辉

#include "LED.h"
#include "delay.h"
#include "sys.h"
#include "Timer.h"
#include "usart.h"

extern u8 TIM2CH1_CAPTURE_STA;
extern u16 TIM2CH1_CAPTURE_VAL;

int main(void )
{
u32 temp=0;
u16 led0pwmval=0;
u8 dir=1;
NVIC_Configuration();
delay_init();
uart_init (9600);
LED_Init();
TIM1_PWM_Init (899,0);
TIM2_Cap_Init (0XFFFF,72-1);
while(1)
{
delay_ms(10);
if(dir)
led0pwmval++;
else led0pwmval--;
if(led0pwmval>300)
dir=0;
if(led0pwmval==0)
dir=1;
TIM_SetCompare1(TIM1,led0pwmval);
TIM_SetCompare1(TIM1,TIM_GetCapture1(TIM1)+1);
if(TIM_GetCapture1(TIM1)==300)
TIM_SetCompare1(TIM1,0);
if(TIM2CH1_CAPTURE_STA&0X80)
{
temp=TIM2CH1_CAPTURE_STA &0X3F;
temp*=65536;
temp+=TIM2CH1_CAPTURE_VAL ;
printf("HIG:%d us\r\n",temp);
TIM2CH1_CAPTURE_STA =0;
}
}
}

捕获初始化
#include "LED.h"
#include "sys.h"
#include "Timer.h"
#include "sys.h"

void TIM1_PWM_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStruct;
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
    TIM_OCInitTypeDef TIM_OCInitStruct;
RCC_AHBPeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
RCC_AHBPeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);

GPIO_InitStruct.GPIO_Pin=GPIO_Pin_8;
GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_Init(GPIOA,&GPIO_InitStruct);

TIM_TimeBaseInitStruct.TIM_Prescaler=psc;
TIM_TimeBaseInitStruct.TIM_Period=arr;
TIM_TimeBaseInitStruct.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseInitStruct.TIM_ClockDivision=0;
TIM_TimeBaseInit(TIM1,&TIM_TimeBaseInitStruct);

TIM_OCInitStruct.TIM_OCMode=TIM_OCMode_PWM2;
TIM_OCInitStruct.TIM_OutputState=TIM_OutputState_Enable;
TIM_OCInitStruct.TIM_OCPolarity=TIM_OCPolarity_High;
TIM_OCInitStruct.TIM_Pulse=0;
TIM_OC1Init(TIM2,&TIM_OCInitStruct);
TIM_CtrlPWMOutputs(TIM1,ENABLE);
TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM1,ENABLE);
TIM_Cmd(TIM1,ENABLE);
}

TIM_ICInitTypeDef TIM2_ICInitStructure;
void TIM2_Cap_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPD;
GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_ResetBits(GPIOA,GPIO_Pin_0);

TIM_TimeBaseStructure.TIM_Prescaler=psc;
TIM_TimeBaseStructure.TIM_Period=arr;
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);

TIM2_ICInitStructure.TIM_Channel=TIM_Channel_1;
TIM2_ICInitStructure.TIM_ICPolarity=TIM_ICPolarity_Rising;
TIM2_ICInitStructure.TIM_ICSelection=TIM_ICSelection_DirectTI;
TIM2_ICInitStructure.TIM_ICPrescaler=TIM_ICPSC_DIV1;
TIM2_ICInitStructure.TIM_ICFilter = 0x00;
TIM_ICInit(TIM2,&TIM2_ICInitStructure);

NVIC_InitStructure.NVIC_IRQChannel=TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=0;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_Init(&NVIC_InitStructure);

TIM_ITConfig(TIM2,TIM_IT_Update|TIM_IT_CC1,ENABLE);
TIM_Cmd(TIM2,ENABLE);
}

u8 TIM2CH1_CAPTURE_STA=0;
u16 TIM2CH1_CAPTURE_VAL;
void TIM2_IRQHandler(void)
{
if((TIM2CH1_CAPTURE_STA&0x80)==0)
{
if(TIM_GetITStatus(TIM2,TIM_IT_Update)!=RESET)
{
if(TIM2CH1_CAPTURE_STA&0x40)
{
if((TIM2CH1_CAPTURE_STA&0X3F)==0X3F)
{
TIM2CH1_CAPTURE_STA|=0X80;
TIM2CH1_CAPTURE_VAL=0XFFFF;
}else TIM2CH1_CAPTURE_STA++;
}
}

if(TIM_GetITStatus(TIM2,TIM_IT_CC1)!=RESET)
{
if(TIM2CH1_CAPTURE_STA&0X40)
{
TIM2CH1_CAPTURE_STA|=0X80;
TIM2CH1_CAPTURE_VAL=TIM_GetCapture1(TIM2);
TIM_OC1PolarityConfig(TIM2,TIM_ICPolarity_Rising);
}else
{
TIM2CH1_CAPTURE_STA=0;
TIM2CH1_CAPTURE_VAL=0;
TIM_SetCounter(TIM2,0);
TIM2CH1_CAPTURE_STA|=0X40;
TIM_OC1PolarityConfig(TIM2,TIM_ICPolarity_Falling);
}
  }
}
TIM_ClearITPendingBit(TIM2,TIM_IT_CC1|TIM_IT_Update);
}

正点原子

帮顶.....