计数程序我是小白大神求解！！！

15071387627 · 发表于 2018-3-1 11:34:09

这是用霍尔元件计数的程序用的是定时器捕获为啥led0总是亮的而且也不能计数而且通过串口输出到电脑屏幕上是乱码的大神们求解

#include "hallsensor.h"
#include "usart.h"

void TIM5_BH_Init(u32 arr,u16 psc)
{
  TIM_ICInitTypeDef  TIM5_ICInitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5,ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_Init(GPIOA,&GPIO_InitStructure);

GPIO_PinAFConfig(GPIOA,GPIO_PinSource0,GPIO_AF_TIM5);


TIM_TimeBaseStructure.TIM_Prescaler=psc;
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period=arr;
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseInit(TIM5,&TIM_TimeBaseStructure);

TIM5_ICInitStructure.TIM_Channel = TIM_Channel_1;
  TIM5_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Falling;
  TIM5_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
  TIM5_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
  TIM5_ICInitStructure.TIM_ICFilter = 0x00;
  TIM_ICInit(TIM5, &TIM5_ICInitStructure);

  TIM_ClearITPendingBit(TIM5,TIM_IT_Update|TIM_IT_CC1);
TIM_ITConfig(TIM5,TIM_IT_Update|TIM_IT_CC1,ENABLE);

TIM_SetCounter(TIM5,0);

  TIM_Cmd(TIM5,ENABLE );

  NVIC_InitStructure.NVIC_IRQChannel = TIM5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority =0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

}

void TIM4_JS_Init(u32 arr,u16 psc)
{

TIM_TimeBaseInitTypeDef  TIM_TimeBaseInitStruct;
NVIC_InitTypeDef  NVIC_InitStruct;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4,ENABLE);

TIM_TimeBaseInitStruct.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseInitStruct.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseInitStruct.TIM_Period=arr;
TIM_TimeBaseInitStruct.TIM_Prescaler=psc;
TIM_TimeBaseInit(TIM4,&TIM_TimeBaseInitStruct);

TIM_ClearITPendingBit(TIM4,TIM_IT_Update);

TIM_ITConfig(TIM4,TIM_IT_Update,ENABLE);

TIM_SetCounter(TIM4,0);

NVIC_InitStruct.NVIC_IRQChannel=TIM4_IRQn;
NVIC_InitStruct.NVIC_IRQChannelCmd=ENABLE;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority=2;
NVIC_InitStruct.NVIC_IRQChannelSubPriority=3;
NVIC_Init(&NVIC_InitStruct);

TIM_Cmd(TIM4,ENABLE);

}

u16 countval=0;
void TIM5_IRQHandler(void)
{
if(TIM_GetITStatus(TIM5,TIM_IT_CC1)==SET)
countval+=countval;

TIM_ClearITPendingBit(TIM5,TIM_IT_CC1);
}

u16 count;
void TIM4_IRQHandler(void)
{
extern u16 countval;
if(TIM_GetITStatus(TIM4,TIM_IT_Update)==SET)
count=countval;

TIM_ClearITPendingBit(TIM4,TIM_IT_Update);
}

#include "stm32f4xx.h"
#include "usart.h"
#include "delay.h"
#include "hallsensor.h"
#include "led.h"

int main(void)
{
  extern u16 count;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
delay_init(168);
uart_init(115200);
LED_Init();

TIM4_JS_Init(4999,83);
TIM5_BH_Init(499,83);

while(1)
{
   printf("CNT:%d\r\n",count);
printf("lwz\r\n");
LED0=!LED0;
delay_ms(500);
}
}