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** FileName: 中断实验 ** Description: 实验中断触发,用串口通信进行检测。 ** Author: 老猫 ** Date: 2019/10/7 ** Others: *********************************************************/ #include "stm32f10x.h" //STM32头文件 #include "sys.h" #include "stdio.h" #include "delay.h" void RCC_Configuration(void); void NVIC_Configuration(void); void GPIO_Configuration(void); void USART_Configuration(void); void EXIT_Configuration(void); int main (void){//主程序 RCC_Configuration(); //时钟设置 NVIC_Configuration(); GPIO_Configuration(); USART_Configuration(); EXIT_Configuration(); while(1); } void GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2; GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA,&GPIO_InitStructure); GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource0);//设置PA0脚为外部中断0输入通道 GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource1);//设置PA1脚为外部中断0输入通道 GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource2);//设置PA2脚为外部中断0输入通道 //TX端设置为推挽输出 GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP; GPIO_Init(GPIOA,&GPIO_InitStructure); //RX端设置为浮空输入脚 GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA,&GPIO_InitStructure); } void NVIC_Configuration(void){ //嵌套中断向量控制器 的设置 NVIC_InitTypeDef NVIC_InitStructure; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //设置NVIC中断分组2:2位抢占优先级,2位响应优先级 //0通道,2级先占优先级,0级次占优先级 NVIC_InitStructure.NVIC_IRQChannel=EXTI0_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2; NVIC_InitStructure.NVIC_IRQChannelSubPriority=0; NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE; NVIC_Init(&NVIC_InitStructure); //1通道,1级先占,0级次占 NVIC_InitStructure.NVIC_IRQChannel=EXTI1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1; NVIC_InitStructure.NVIC_IRQChannelSubPriority=0; NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE; NVIC_Init(&NVIC_InitStructure); //2通道,0级先占,0级次占 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); } void EXIT_Configuration(void) { //设置中断通道沿下降沿触发 EXTI_InitTypeDef EXTI_InitStructure; EXTI_InitStructure.EXTI_Line=EXTI_Line0|EXTI_Line1|EXTI_Line2; EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Falling; EXTI_InitStructure.EXTI_LineCmd=ENABLE; EXTI_Init(&EXTI_InitStructure); } void USART_Configuration(void) { USART_InitTypeDef USART_InitStructure; 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); } //将printf函数定位到usatr1 int fputc(int ch,FILE *f) { USART_SendData(USART1,(u8)ch); while(USART_GetFlagStatus(USART1,USART_FLAG_TC)==RESET); return ch; } #include "stm32f10x_it.h" #include "stdio.h" //外部中断0中断服务函数 void EXTI0_IRQHandler(void) { printf("rnEXIT0 enter.rn"); EXTI_GenerateSWInterrupt(EXTI_Line1); printf("rnEXIT0 return.rn"); EXTI_ClearFlag(EXTI_Line0); } //外部中断1中断服务函数 void EXTI1_IRQHandler(void) { printf("rnEXIT1 enter.rn"); EXTI_GenerateSWInterrupt(EXTI_Line2); printf("rnEXIT1 return.rn"); EXTI_ClearFlag(EXTI_Line1); } //外部中断2中断服务函数 void EXTI2_IRQHandler(void) { printf("rnEXIT2 enter.rn"); printf("rnEXIT2 return.rn"); EXTI_ClearFlag(EXTI_Line2); } |
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