stm32之定时器彻底研究

1、timer.c文件

#include "STM32Lib\\stm32f10x.h"
void TIM2_Configuration(void)
{
 TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
 TIM_OCInitTypeDef  TIM_OCInitStructure;
 u16 CCR1_Val = 4000;
 u16 CCR2_Val = 2000;
 u16 CCR3_Val = 1000;
 u16 CCR4_Val = 500; 
 /* TIM2 clock enable */
   RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
 

 /* 基础设置*/
 TIM_TimeBaseStructure.TIM_Period = 10000;   //计满值 
 TIM_TimeBaseStructure.TIM_Prescaler = 7200-1;     //预分频,此值+1为分频的除数
 TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;   //
 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //向上计数
 
 TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
 
 /* 比较通道1*/
 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Inactive;        //输出比较非主动模式
 TIM_OCInitStructure.TIM_Pulse = CCR1_Val;  
 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;  //极性为正
   
 TIM_OC1Init(TIM2, &TIM_OCInitStructure);
 TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Disable);    //禁止OC1重装载,其实可以省掉这句,因为默认是4路都不重装的.
 
 /*比较通道2 */        
 TIM_OCInitStructure.TIM_Pulse = CCR2_Val;  
 
 TIM_OC2Init(TIM2, &TIM_OCInitStructure); 
 TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Disable);
 
 /* 比较通道3 */         
 TIM_OCInitStructure.TIM_Pulse = CCR3_Val;  
 
 TIM_OC3Init(TIM2, &TIM_OCInitStructure);
 TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Disable);
 
 /* 比较通道4 */       
 TIM_OCInitStructure.TIM_Pulse = CCR4_Val;  
 
 TIM_OC4Init(TIM2, &TIM_OCInitStructure);
 TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Disable);
 
 /*使能预装载*/
 TIM_ARRPreloadConfig(TIM2, ENABLE);
 /*预先清除所有中断位*/
 TIM_ClearITPendingBit(TIM2, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4|TIM_IT_Update);

 /* 4个通道和溢出都配置中断*/
 TIM_ITConfig(TIM2, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4|TIM_IT_Update, ENABLE);
 
 
 /* 允许TIM2开始计数 */
 TIM_Cmd(TIM2, ENABLE);
}
void TIM3_Configuration(u16 p,u16 psc)
{
RCC->APB1ENR|=1<<1;//TIM3时钟使能
//自动装载寄存器
TIM3->ARR=p; //设定定时器自动重装值
//PSC预分频寄存器
TIM3->PSC=psc; //设定定时器的分频系数

TIM3->DIER|=1<<0; //允许更新中断
TIM3->DIER|=1<<6; //允许触发中断
TIM3->CR1|=0X01; //使能定时器3（这里面包括计数方向为向上计数）
}
#if 0
void TIM4_Configuration(void)
{
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
 TIM_OCInitTypeDef  TIM_OCInitStructure;

 /* TIM4 clock enable */
   RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
 
 /* 基础设置*/
 TIM_TimeBaseStructure.TIM_Period = 10000;   //计满值 
 TIM_TimeBaseStructure.TIM_Prescaler = 7200-1;     //预分频,此值+1为分频的除数
 TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;   //
 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //向上计数
 TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
 
 
 /*使能预装载*/
 TIM_ARRPreloadConfig(TIM4, ENABLE);
 /*预先清除所有中断位*/
 TIM_ClearITPendingBit(TIM4, TIM_IT_Update);

 
 TIM_ITConfig(TIM4, TIM_IT_Update, ENABLE);
 
 
 /* 允许TIM2开始计数 */
 TIM_Cmd(TIM4, ENABLE);
}
#else 
void TIM_Configuration(u16 p,u16 psc)
{
RCC->APB1ENR|=1<<2;//TIM4时钟使能
//自动装载寄存器
TIM4->ARR=p; //设定定时器自动重装值
//PSC预分频寄存器
TIM4->PSC=psc; //设定定时器的分频系数

TIM4->DIER|=1<<0; //允许更新中断
TIM4->DIER|=1<<6; //允许触发中断
TIM4->CR1|=0X01; //使能定时器3（这里面包括计数方向为向上计数）
}
#endif

2、stm32f10x_it.c文件

/*******************************************************************************
* Function Name  : TIM2_IRQHandler TIM2中断
* Description    : This function handles TIM2 global interrupt request.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/

unsigned int cnt=0;
unsigned int flag=0;
void TIM2_IRQHandler(void)
{
 if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)
 {
  /*必须清空标志位*/
  TIM_ClearITPendingBit(TIM2, TIM_IT_CC1);
 
  //可添加功能块......
 
 }
 else if (TIM_GetITStatus(TIM2, TIM_IT_CC2) != RESET)
 {
  TIM_ClearITPendingBit(TIM2, TIM_IT_CC2);
 
  //可添加功能块......
 }
 else if (TIM_GetITStatus(TIM2, TIM_IT_CC3) != RESET)
 {
  TIM_ClearITPendingBit(TIM2, TIM_IT_CC3);
  
  //可添加功能块......
 }
 else if (TIM_GetITStatus(TIM2, TIM_IT_CC4) != RESET)
 {
    TIM_ClearITPendingBit(TIM2, TIM_IT_CC4);
     
    //可添加功能块......
 }
 if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
 {
  TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
  //flag=1;//计时满标志位置位
  //cnt++;//每TIM_Period计时满变量加一
 }
}

/*******************************************************************************
* Function Name  : TIM3_IRQHandler
* Description    : This function handles TIM3 global interrupt request.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void TIM3_IRQHandler(void)
{
if(TIM3->SR&0X0001)
{
cnt++;
flag=1;
}
TIM3->SR&=~(1<<0);
}

/*******************************************************************************
* Function Name  : TIM4_IRQHandler
* Description    : This function handles TIM4 global interrupt request.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void TIM4_IRQHandler(void)
{
 if(TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET)
 {
     TIM_ClearITPendingBit(TIM4, TIM_IT_Update);
        cnt++;
  flag=1;
 }  
}

#include "STM32Lib\\stm32f10x.h"

//设置所有的中断允许

void NVIC_Configuration(void)
{
 NVIC_InitTypeDef NVIC_InitStructure;
 

  /* Timer2中断*/
 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
 NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 4;
 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 NVIC_Init(&NVIC_InitStructure);

#if 1
 /* Configure one bit for preemption priority */
 /* Timer3中断*/
 NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 NVIC_Init(&NVIC_InitStructure);

 

  /* Timer4中断*/
 NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 NVIC_Init(&NVIC_InitStructure);

#endif

 /*UART1*/
 NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 NVIC_Init(&NVIC_InitStructure);
}
 

 

#include "STM32Lib\\stm32f10x.h"
#include "hal.h"
#include "stdio.h"
#include "string.h"
extern unsigned int cnt;
extern unsigned int flag;

int fputc(int ch, FILE *f)  
{  
 //USART_SendData(USART1, (u8) ch);  
 
 USART1->DR = (u8) ch;  
 
 /* Loop until the end of transmission */  
 
 while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET)   
 {   
 }   
 return ch;  
}

int main(void)
{ 
 CanTxMsg msg;
 msg.StdId=0x11;
 msg.DLC=8;
 msg.IDE=CAN_ID_STD;
 msg.RTR=CAN_RTR_DATA;
 memset(msg.Data,0x11,8);
 ChipHalInit();   //片内硬件初始化
 ChipOutHalInit();  //片外硬件初始化
 
 for(;;)
 {
 can_send(&msg);
 if(flag)
 {
 flag=0;
 
 printf("cnt is %d\n",cnt);
 }
 } 
}

#include "STM32Lib\\stm32f10x.h"
#include "hal.h"
#include <string.h>

//CAN总线的发送接收管脚的初始化
void CAN_Configuration(void)
{
 GPIO_InitTypeDef GPIO_InitStructure;
 //RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO,ENABLE);

 //RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);

 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
 
 
 
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);         
 /* PA11-CAN RX */
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; 
 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
 GPIO_Init(GPIOA, &GPIO_InitStructure);
 
 /*PA12-CAN TX */
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
 GPIO_Init(GPIOA, &GPIO_InitStructure);

 RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);
// RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);
}

/*******************************************************************************
**CAN中断测试
*******************************************************************************/
void CAN_Interrupt(void)
{
 CAN_InitTypeDef        CAN_InitStructure;
 CAN_FilterInitTypeDef  CAN_FilterInitStructure;
// CanTxMsg TxMessage;
 
 /* CAN register init */
 CAN_DeInit(CAN1);
 CAN_StructInit(&CAN_InitStructure);
 
 /* CAN cell init */
 /* CAN cell init */
 CAN_InitStructure.CAN_TTCM=DISABLE;  //时间触发
 CAN_InitStructure.CAN_ABOM=DISABLE;  //自动离线管理
 CAN_InitStructure.CAN_AWUM=DISABLE;  //自动唤醒
 CAN_InitStructure.CAN_NART=DISABLE;  //ENABLE:错误不自动重传 DISABLE:重传
 CAN_InitStructure.CAN_RFLM=DISABLE;
 CAN_InitStructure.CAN_TXFP=DISABLE;
 CAN_InitStructure.CAN_Mode=CAN_Mode_Normal;  //CAN_Mode_LoopBack，CAN_Mode_Normal
 CAN_InitStructure.CAN_SJW=CAN_SJW_1tq;   //1-4
 CAN_InitStructure.CAN_BS1=CAN_BS1_5tq;   //1-16
 CAN_InitStructure.CAN_BS2=CAN_BS2_3tq;   //1-8
 CAN_InitStructure.CAN_Prescaler=4;    //波特率为 36/(4*(1+5+3))=1000k
 CAN_Init(CAN1,&CAN_InitStructure);
 
 /* CAN 过滤器设置 */
 CAN_FilterInitStructure.CAN_FilterNumber=0;
 CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;
 CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit;
 CAN_FilterInitStructure.CAN_FilterIdHigh=0x0000;
 CAN_FilterInitStructure.CAN_FilterIdLow=0x0000;
 CAN_FilterInitStructure.CAN_FilterMaskIdHigh=0x0000;
 CAN_FilterInitStructure.CAN_FilterMaskIdLow=0x0000;
 CAN_FilterInitStructure.CAN_FilterFIFOAssignment=CAN_FIFO0;
 CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;
 CAN_FilterInit(&CAN_FilterInitStructure);
 
 /* 允许FMP0中断*/ 
 CAN_ITConfig(CAN1,CAN_IT_FMP0, ENABLE);
}/*
typedef struct
{
  uint32_t StdId;
  uint32_t ExtId;
  uint8_t IDE;
  uint8_t RTR;
  uint8_t DLC;
  uint8_t Data[8];
} CanTxMsg;
*/
//发送一个2字节的数据
void SendCan(u16 dat)
{
 CanTxMsg TxMessage;
 
 TxMessage.ExtId=0x01;
 TxMessage.IDE=CAN_ID_EXT;
 TxMessage.RTR=CAN_RTR_DATA;
 TxMessage.DLC=2;
 TxMessage.Data[0]=dat&0xff;
 TxMessage.Data[1]=dat>>8;
 
 CAN_Transmit(CAN1,&TxMessage);
}
#if 1
int can_send(CanTxMsg  *pTransmitBuf)
{
  u8 TransmitMailbox=0;
  CanTxMsg TxMessage;
  if(pTransmitBuf -> DLC > 8)
  {
       return  1;
  }
  /* transmit */
  TxMessage.StdId=pTransmitBuf ->StdId;//用来设定标准标识符（0-0x7ff，11位）
  //TxMessage.ExtId=pTransmitBuf ->ExtId;
  TxMessage.RTR=  pTransmitBuf ->RTR;//设置RTR位为数据帧
  TxMessage.IDE=  pTransmitBuf ->IDE;//标识符扩展位，为标准帧
  TxMessage.DLC=  pTransmitBuf ->DLC;//设置数据长度
  //根据DLC字段的值，将有效数据拷贝到发送数据寄存器
  memcpy(TxMessage.Data, pTransmitBuf ->Data,pTransmitBuf ->DLC);
  TransmitMailbox = CAN_Transmit(CAN1,&TxMessage);
  TransmitMailbox=TransmitMailbox;//加上这句话就是防止编译器产生警告
  return 1;
}
#endif

6、hal.c文件

/***************************************************
**HAL.c
**主要用于芯片硬件的内部外围和外部外围的初始化，两大INIT函数
**在MAIN中调用，使MAIN函数中尽量与硬件库无关
***************************************************/
//STM32F103RBT6有三个通用定时器，定时器2、3、4；操作基本一致
#include "STM32Lib\\stm32f10x.h"

//各个内部硬件模块的配置函数
extern void GPIO_Configuration(void);   //GPIO
extern void RCC_Configuration(void);   //RCC
extern void USART_Configuration(void);   //串口
extern void NVIC_Configuration(void);   //NVIC

extern void TIM2_Configuration(void);
extern void TIM3_Configuration(u16 p,u16 psc);
extern void TIM4_Configuration(void);
extern void TIM_Configuration(u16 p,u16 psc);

extern void CAN_Configuration(void);
extern void CAN_Interrupt(void);

/*******************************
**函数名:ChipHalInit()
**功能:片内硬件初始化
*******************************/
void  ChipHalInit(void)
{
 //初始化时钟源
 RCC_Configuration();
 
 //初始化GPIO
 GPIO_Configuration();
 
 //初始化中断源
 NVIC_Configuration();

 //初始化串口
 USART_Configuration();
 
 //初始化定时器
 //TIM2_Configuration();
 //
 //TIM3_Configuration(10000,7199);

 //TIM4_Configuration();
 TIM_Configuration(10000,7199);
 //初始化CAN总线
 CAN_Configuration();
 //初始化CAN总线接收中断
 CAN_Interrupt();

}

 

/*********************************
**函数名:ChipOutHalInit()
**功能:片外硬件初始化
*********************************/
void  ChipOutHalInit(void)
{
 
}