STM32--定时器中断程序文档(2)

/***********************************************************************

火牛开发板基础实验 外部中断实验

分别按下S3、S4，在串口1打印出相关信息

************************************************************************/

#include "stm32f10x.h" #include "string.h"

/***********************************************************************

************************************************************************/ void RCC_Configuration(void) {

/* 使能外设时钟 */

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | ENABLE);

RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE,

外设时钟使能

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2 ENABLE); }

| RCC_APB1Periph_TIM3,

/*******************************************************************************

全部用到的引脚将在在配置

*******************************************************************************/

void GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure;

/* 配置串口1引脚 */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOE, &GPIO_InitStructure);

/*外部中断引脚*/

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9| GPIO_Pin_10 | GPIO_Pin_11;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //上拉输出 GPIO_Init(GPIOD, &GPIO_InitStructure); }

/*******************************************************************************

全部中断在此配置

*******************************************************************************/

void NVIC_Configuration(void) {

NVIC_InitTypeDef NVIC_InitStructure;

/* Configure the NVIC Preemption Priority Bits */ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM3中断

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //先占优先级0级 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //从优先级3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

}

/*******************************************************************************

外部中断在此配置

*******************************************************************************/

void EXTI_Configuration(void)

{

EXTI_InitTypeDef EXTI_InitStructure; GPIO_EXTILineConfig(GPIO_PortSourceGPIOD, GPIO_PinSource8); // S4中断

GPIO_EXTILineConfig(GPIO_PortSourceGPIOD, GPIO_PinSource9); GPIO_EXTILineConfig(GPIO_PortSourceGPIOD, GPIO_PinSource10); GPIO_EXTILineConfig(GPIO_PortSourceGPIOD, GPIO_PinSource11); EXTI_ClearITPendingBit(EXTI_Line8); EXTI_ClearITPendingBit(EXTI_Line9); EXTI_ClearITPendingBit(EXTI_Line10);

EXTI_ClearITPendingBit(EXTI_Line11);

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; EXTI_InitStructure.EXTI_Line=EXTI_Line8|EXTI_Line9|EXTI_Line10|EXTI_Line11; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure);

}

/*******************************************************************************

TIM3配置

*******************************************************************************/

void TIM3_Configuration(unsigned int x) {

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

/* --------------------------------------------------------------- TIM3CLK 即PCLK1=36MHz

TIM3CLK = 36 MHz, Prescaler = 7200, TIM3 counter clock = 5K,即改变一次为5K,周期就为10K

--------------------------------------------------------------- */

/* Time base configuration */ TIM_TimeBaseStructure.TIM_Period = x; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值 计数到5000为500ms TIM_TimeBaseStructure.TIM_Prescaler =(7200-1); //设置用来作为TIMx时钟频率除数的预分频值 10Khz的计数频率

TIM_TimeBaseStructure.TIM_ClockDivision = 0; //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(TIM3, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位

/* TIM IT enable */

TIM_ITConfig( //使能或者失能指定的TIM中断 TIM3, TIM_IT_Update | //TIM 中断源 TIM_IT_Trigger, //TIM 触发中断源

ENABLE //使能 );

/* TIM3 enable counter */

TIM_Cmd(TIM3, ENABLE); //使能TIMx外设

}

/*******************************************************************************

初始化时钟晶振 72MHZ

*******************************************************************************/

void SysClock_Init(void) {

ErrorStatus HSEStartUpStatus; RCC_DeInit();

RCC_HSEConfig(RCC_HSE_ON);

HSEStartUpStatus = RCC_WaitForHSEStartUp(); if(HSEStartUpStatus == SUCCESS){

FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

FLASH_SetLatency(FLASH_Latency_2); RCC_HCLKConfig(RCC_SYSCLK_Div1); RCC_PCLK2Config(RCC_HCLK_Div1); RCC_PCLK1Config(RCC_HCLK_Div2);

RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9); RCC_PLLCmd(ENABLE);

while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET){

}

RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); while(RCC_GetSYSCLKSource() != 0x08){ ; }

}

}

/*****************************************************************

USART1 初始化 baud 波特率

*****************************************************************/ void USART1_Init(unsigned int baud)

{

USART_InitTypeDef USART_InitStructure;

USART_InitStructure.USART_BaudRate = baud;

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_ITConfig(USART1, USART_IT_RXNE, ENABLE); USART_Cmd(USART1, ENABLE); }

/*****************************************************************

从 USART1 发送一个字节

*****************************************************************/ void USART1_SendByte(unsigned char temp) {

USART_SendData(USART1, temp);

while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET); }

/*****************************************************************

=

从 USART1 发送字符串

*****************************************************************/ void USART1_Printf(char *pch) {

while(*pch != '\0')

{

USART1_SendByte(*(unsigned char *)pch); pch++; } }

/****************************************** * * 延时程序 ms

*

****************************************/ void Delay(unsigned short time) {

unsigned short i, j; }

/*******************************************************

MAIN 函数

for(; time > 0; time--){ for(j = 0; j

}

*******************************************************/ int main(void) {

SysClock_Init();

// 初始化系统时钟 72MHZ

RCC_Configuration(); // 使能外设 GPIO_Configuration(); // 配置引脚 NVIC_Configuration(); // 配置中断

// // // //

USART1_Init(9600);

// 配置串口1，波特率9600

TIM3_Configuration();

TIM3_Configuration(10000); while(1){

Delay(500);

GPIO_SetBits(GPIOE, GPIO_Pin_0);

Delay(500);

// GPIO_ResetBits(GPIOE, GPIO_Pin_0);

}

// return(0); } /**

****************************************************************************** * @file Project/STM32F10x_StdPeriph_Template/stm32f10x_it.c * @author MCD Application Team * @version V3.4.0

* @date 10/15/2010

* @brief Main Interrupt Service Routines.

* This file provides template for all exceptions handler and * peripherals interrupt service routine.

****************************************************************************** * @copy *

* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS

* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE

* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY

* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING

* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE

* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.

*

*

© COPYRIGHT 2010 STMicroelectronics

*/

/* Includes ------------------------------------------------------------------*/ #include "stm32f10x_it.h"

extern TIM3_Configuration(unsigned int x); //extern TIM4_Configuration(void) extern void USART1_Printf(char *pch);

/** @addtogroup STM32F10x_StdPeriph_Template * @{ */

/* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ /* Private functions ---------------------------------------------------------*/

/******************************************************************************/

/* Cortex-M3 Processor Exceptions Handlers */ /******************************************************************************/

/**

* @brief This function handles NMI exception. * @param None * @retval None */

void NMI_Handler(void) { }

/**

* @brief This function handles Hard Fault exception. * @param None * @retval None */

void HardFault_Handler(void) {

/* Go to infinite loop when Hard Fault exception occurs */ while (1) {

}

} /**

* @brief This function handles Memory Manage exception. * @param None * @retval None

*/

void MemManage_Handler(void) {

/* Go to infinite loop when Memory Manage exception occurs */ while (1) { } }

/**

* @brief This function handles Bus Fault exception. * @param None * @retval None */

void BusFault_Handler(void) {

/* Go to infinite loop when Bus Fault exception occurs */ while (1) { } } /**

* @brief This function handles Usage Fault exception. * @param None * @retval None */

void UsageFault_Handler(void) {

/* Go to infinite loop when Usage Fault exception occurs */ while (1) { } }

/**

* @brief This function handles SVCall exception.

* @param None * @retval None */

void SVC_Handler(void) { }

/**

* @brief This function handles Debug Monitor exception. * @param None * @retval None */

void DebugMon_Handler(void) { }

/**

* @brief This function handles PendSVC exception. * @param None * @retval None */

void PendSV_Handler(void) { }

/**

* @brief This function handles SysTick Handler. * @param None * @retval None */

void SysTick_Handler(void) { }

/*******************************************************************************

* Function Name : USART1_IRQHandler

* Description : This function handles USART1 global interrupt request. * Input : None * Output : None

* Return : None

*******************************************************************************/

extern void USART1_SendByte(unsigned char temp); // 声明外部函数

void USART1_IRQHandler(void)

{

if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET){ // 如果是串口接收中断

USART1_SendByte(USART_ReceiveData(USART1));

去

}

}

void TIM3_IRQHandler(unsigned int x)

{

static unsigned char flag = 0;

if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET){ //检查指定的TIM中断发生与否:TIM 中断源

TIM_ClearITPendingBit(TIM3, TIM_IT_Update ); //清除TIMx的中断待处理位:TIM 中断源

} if(flag == 0){ GPIO_ResetBits(GPIOE, GPIO_Pin_0); }else{ GPIO_SetBits(GPIOE, GPIO_Pin_0); } flag = !flag; // 将接收到的字节发送出

}

//void TIM4_IRQHandler(void)

//{

// static unsigned char flag = 0;

//

// if (TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET){ //检查指定的TIM中断发生与否:TIM 中断源

// TIM_ClearITPendingBit(TIM4, TIM_IT_Update ); //清除TIMx的中断待处理位:TIM 中断源

//

//

//

//

//

//

//

if(flag == 0){ GPIO_ResetBits(GPIOE, GPIO_Pin_0); }else{ GPIO_SetBits(GPIOE, GPIO_Pin_0); } flag = !flag;

//}

/*******************************************************************************

* Function Name : EXTI9_5_IRQHandler

* Description : This function handles EXTI9_5 global interrupt request.

* Input : None

* Output : None

* Return : None

*******************************************************************************/

void EXTI9_5_IRQHandler(void)

{ if(EXTI_GetITStatus(EXTI_Line8) != RESET) { EXTI_ClearITPendingBit(EXTI_Line8); TIM3_Configuration(10000); } if(EXTI_GetITStatus(EXTI_Line9) != RESET) { EXTI_ClearITPendingBit(EXTI_Line9); TIM3_Configuration(20000);

}

}

void EXTI15_10_IRQHandler(void)

{

if(EXTI_GetITStatus(EXTI_Line10) != RESET) { TIM3_Configuration(30000); EXTI_ClearITPendingBit(EXTI_Line10); } { EXTI_ClearITPendingBit(EXTI_Line11); TIM3_Configuration(40000); if(EXTI_GetITStatus(EXTI_Line11) != RESET)

} /******************************************************************************/

/* STM32F10x Peripherals Interrupt Handlers */ /* Add here the Interrupt Handler for the used peripheral(s) (PPP), for the */

/* available peripheral interrupt handler's name please refer to the startup */

/* file (startup_stm32f10x_xx.s). */

/******************************************************************************/

/**

* @brief This function handles PPP interrupt request.

* @param None

* @retval None

*/

/*void PPP_IRQHandler(void)

{

}*/

/**

* @}

*/

/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/