如何配置TIM对外部脉冲计数啊

Zoepreal · 发表于 2016-3-9 20:15:59

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include <stdio.h>

/* Private functions ---------------------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void USART1_configuration(void);
void TIM5_Configuration(void);
void Delay(__IO uint32_t nCount);
int fputc(int ch, FILE *f);
int fgetc(FILE *f);
/**
  * @brief  Main program.
  * @param  None
  * @retval None
  */
int main(void)
{
u32 oldcount = 0;
RCC_Configuration();
GPIO_Configuration();
USART1_configuration();
printf("\r\n This is a TIM external tigger counting expriment !\r\n");
  /* Add your application code here */
TIM5_Configuration();
//RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE );
while(1)
{
Delay(0xfff);
if(oldcount != TIM3->CNT)
{
oldcount = TIM3->CNT;
printf("\r\n Now Number = %d\r\n",oldcount);
}
}

}
/**
  * @brief  Configure the Clocks.
  * @param  None
  * @retval None
  */
void RCC_Configuration(void)
{
/*Enable the TIM3 clock*/
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5,ENABLE );

/* config USART1 clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);

/*Enable the GPIOA and GPIOC clocks*/
RCC_APB2PeriphClockCmd (RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOC,ENABLE );

}
/**
  * @brief  Configure the different GPIO ports.
  * @param  None
  * @retval None
  */
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* USART1 GPIO configration ------------------------------------------------------------*/
/* Configure USART1 Tx (PA.09) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART1 Rx (PA.10) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/*TIM3_CH2 GPIO configuration-------------------------------------------------------------*/
/*Configure TIM5_CH1(PA.0) as floating input*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING ;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
/**
  * @brief  Configure the USART1.
  * @param  None
  * @retval None
  */
void USART1_configuration(void)
{
USART_InitTypeDef USART_InitStructure;
/* USART1 mode config */
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
}
  /**
* @brief  Configures the TIM3 .
* @param  None
* @retval None
   * @attention
* TIM_Period / Auto Reload Register(ARR) = 1000 TIM_Prescaler--71
* ÖD¶ÏÖüÆúÎa = 1/(72MHZ /72) * 1000 = 1ms
*
* TIMxCLK/CK_PSC --> TIMxCNT --> TIM_Period(ARR) --> ÖD¶Ï ÇòTIMxCNTÖØÖÃÎa0ÖØDÂ¼Æêy
*/
void TIM5_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
//TIM_ICInitTypeDef TIM3_ICInitStructure;

TIM_TimeBaseStructure.TIM_Period = 0xFFFF;
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM5, & TIM_TimeBaseStructure);

/*Configures the External clock Mode2. */
TIM_ETRClockMode2Config (TIM5,TIM_ExtTRGPSC_OFF,TIM_ExtTRGPolarity_NonInverted,  0x00);
/*Sets the TIM3 Counter Register value as 0 */
TIM_SetCounter( TIM5,0);

TIM_Cmd(TIM5, ENABLE);

}
/**
  * @brief  redirect Function Print to USART1 .
  * @param  None
  * @retval None
  */
int fputc(int ch, FILE *f)
{
/* ·￠Ëíò»¸ö×Ö½úêy¾Yμ½USART1 */
USART_SendData(USART1, (uint8_t) ch);

/* μè′y·￠Ëííê±Ï */
while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);

return (ch);
}

/**
  * @brief  redirect Function Scanf to USART1 .
  * @param  None
  * @retval None
  */
int fgetc(FILE *f)
{
/* μè′y′®¿ú1êäèëêy¾Y */
while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);

return (int)USART_ReceiveData(USART1);
}
/**
   * @brief  Inserts a delay time.
* @param  nCount: specifies the delay time length.
* @retval None
*/
void Delay(__IO uint32_t nCount)
{
for(; nCount != 0; nCount--);
}

我是照着网上别人的改的。。。但是不行啊...
请问定时器对外部脉冲计数如何配置...?

Zoepreal · 发表于 2016-3-9 20:18:30

@fire 没有找到库函数版的啊

Zoepreal · 发表于 2016-3-9 20:19:14

火哥出个库函数版的吧

Zoepreal · 发表于 2016-3-9 20:22:02

各位大神看看哪里有问题

flyleaf · 发表于 2016-3-9 20:52:40

把定时器的时钟源改成外部输入

Zoepreal · 发表于 2016-3-9 21:16:20

flyleaf 发表于 2016-3-9 20:52
把定时器的时钟源改成外部输入

怎么配置啊？

用哪一个库函数啊

Zoepreal · 发表于 2016-3-9 21:40:32

flyleaf 发表于 2016-3-9 20:52
把定时器的时钟源改成外部输入

void TIM_TIxExternalClockConfig  ( TIM_TypeDef *  TIMx,
  uint16_t  TIM_TIxExternalCLKSource,
  uint16_t  TIM_ICPolarity,
  uint16_t  ICFilter
)

Zoepreal · 发表于 2016-3-9 21:42:05

flyleaf 发表于 2016-3-9 20:52
把定时器的时钟源改成外部输入

是这个函数配置吗？我想用的是TIM5_CH1即PA0...依旧不行啊

Zoepreal · 发表于 2016-3-9 22:09:15

我发现有个地方写错了。oldcount = TIM3->CNT;改成oldcount = TIM5->CNT
但依旧不行@fire

fire · 发表于 2016-3-10 11:07:12

Zoepreal 发表于 2016-3-9 22:09
我发现有个地方写错了。oldcount = TIM3->CNT;改成oldcount = TIM5->CNT
但依旧不行@fire

你描述下，你具体想实现的功能

Zoepreal · 发表于 2016-3-10 16:32:30

fire 发表于 2016-3-10 11:07
你描述下，你具体想实现的功能

就是想用一个定时器的计数模式实现对外部脉冲的计数。来一个脉冲就计个数...像51单片机的定时器不就有计数模式吗？stm32也有。。。但是我不知道用哪些库函数配...网上有的我试了不行，也不知道是我通道配置的不行还是？....网上还有就是原子的寄存器版本的一个程序，是选用TIM5——CH1..对应PA0 选用上拉输入...其中对寄存器的操作..看不懂...也不知道怎么找相应的库函数.....

fire · 发表于 2016-3-10 16:42:58

Zoepreal 发表于 2016-3-10 16:32
就是想用一个定时器的计数模式实现对外部脉冲的计数。来一个脉冲就计个数...像51单片机的定时器不就有计 ...

直接用捕获模式，不就可以了嘛？

笨跑哥 · 发表于 2016-3-10 19:09:49

一直在关注这个问题。。。。。继续关注

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如何配置TIM对外部脉冲计数啊

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