STM32外部中程序断(2).doc

/*/ 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/*/ 外设时钟使能/*/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 | / RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE, ENABLE);/ /RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);/*/ / 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_9|GPIO_8;/ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;/ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;/ / GPIO_Init(GPIOB, &GPIO_InitStructure);/ 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_2 | GPIO_Pin_3;/GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;/ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;/ GPIO_Init(GPIOE, &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);/ /* Enable the USART1 Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn;/NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;/ NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;/ NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;/ NVIC_Init(&NVIC_InitStructure);/NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;/NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;/ NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;/ NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;/ NVIC_Init(&NVIC_InitStructure);/NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;/ S4中断入口/ NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;/ NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;/ NVIC_Init(&NVIC_InitStructure);/NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;/ S3中断入口/ NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;/ NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;/ NVIC_Init(&NVIC_InitStructure);/*/ 外部中断在此配置/*/void EXTI_Configuration(void)/ EXTI_InitTypeDef EXTI_InitStructure;/GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource2); / S4中断/GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource3);/EXTI_ClearITPendingBit(EXTI_Line2);/EXTI_ClearITPendingBit(EXTI_Line3);/ EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;/ EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;/EXTI_InitStructure.EXTI_Line=EXTI_Line2|EXTI_Line3;/ EXTI_InitStructure.EXTI_LineCmd = ENABLE;/ EXTI_Init(&EXTI_InitStructure);/GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0); / S3中断/EXTI_InitStructure.EXTI_Line = EXTI_Line0;/ EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;/ EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;/ EXTI_InitStructure.EXTI_LineCmd = ENABLE;/ EXTI_Init(&EXTI_InitStructure);/EXTI_GenerateSWInterrupt(EXTI_Line13);/*/ 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;/for(; time 0; time-)/ for(j = 0; j 10; j+)/ for(i = 0; i 0; time-) for(j = 0; j 10; j+) for(i = 0; i 1000; i+);/*MAIN 函数 */int main(void) SysClock_Init(); / 初始化系统时钟 72MHZRCC_Configuration(); /使能外设GPIO_Configuration(); /配置引脚 EXTI_Configuration();NVIC_Configuration(); / 配置中断USART1_Init(9600); / 配置串口1，波特率9600 while(1) GPIO_ResetBits(GPIOD, GPIO_Pin_9);/Delay(400); GPIO_ResetBits(GPIOD, GPIO_Pin_11);/Delay(400); GPIO_ResetBits(GPIOD, GPIO_Pin_8);/Delay(400); GPIO_ResetBits(GPIOD, GPIO_Pin_10); Delay(400); GPIO_SetBits(GPIOD, GPIO_Pin_8); GPIO_SetBits(GPIOD, GPIO_Pin_11); /Delay(400); GPIO_SetBits(GPIOD, GPIO_Pin_10);/Delay(100); GPIO_SetBits(GPIOD, GPIO_Pin_9 );Delay(400); GPIO_SetBits(GPIOD, GPIO_Pin_8); Delay(400); GPIO_ResetBits(GPIOD, GPIO_Pin_8); Delay(400); GPIO_SetBits(GPIOD, GPIO_Pin_9); Delay(400); GPIO_ResetBits(GPIOD, GPIO_Pin_9);Delay(400); GPIO_SetBits(GPIOD, GPIO_Pin_10); Delay(400); GPIO_ResetBits(GPIOD, GPIO_Pin_10); Delay(400); GPIO_SetBits(GPIOD, GPIO_Pin_11); Delay(400); GPIO_ResetBits(GPIOD, GPIO_Pin_11); Delay(400); /Delay(400);/ GPIO_SetBits(GPIOD, GPIO_Pin_8);/ /Delay(400); /Delay(400);/ GPIO_SetBits(GPIOD, GPIO_Pin_8); / /Delay(400);/ GPIO_SetBits(GPIOD, GPIO_Pin_10);/Delay(100); / GPIO_ResetBits(GPIOD, GPIO_Pin_11);/Delay(400);/ GPIO_SetBits(GPIOD, GPIO_Pin_9);/ /Delay(400); /* * * 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.hextern 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 func