STM32的串口配置(中断方式)

STM32的串口中断配置,也是很简单的. 首先是配置UART的GPIO口 首先是配置UART的GPIO口 /******************************************************************************* * Name : UART1_GPIO_Configuration * Deion : Configures the uart1 GPIO ports. * Input : None * Output : None * Return : None *******************************************************************************/ void UART1_GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; // Configure USART1_Tx as alternate push-pull 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); // Configure USART1_Rx as input floating GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); } 然后是配置串口参数 /******************************************************************************* * Name : UART1_Configuration * Deion : Configures the uart1 * Input : None * Output : None * Return : None *******************************************************************************/ void USART_Configuration(void) { USART_InitTypeDef USART_InitStructure; USART_ClockInitTypeDef USART_ClockInitStructure; Uart1_GPIO_Configuration(); USART_ClockInitStructure.USART_Clock = USART_Clock_Disable; USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low; USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge; USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable; /* Configure the USART1 synchronous paramters */ USART_ClockInit(USART1, &USART_ClockInitStructure); USART_InitStructure.USART_BaudRate = 9600; 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; /* Configure USART1 basic and asynchronous paramters */ USART_Init(USART1, &USART_InitStructure); /* Enable USART1 Receive interrupts */ USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); /* Enable USART1 */ USART_Cmd(USART1, ENABLE); } 然后是在中断设置,需要修改stm32f10x_it.c 中的串口中断函数 并且需要修改void NVIC_Configuration(void)函数 修改NVIC_Configuration函数 /******************************************************************************* * Name : NVIC_Configuration * Deion : Configures NVIC and Vector Table base location. * Input : None * Output : None * Return : None *******************************************************************************/ void NVIC_Configuration(void) { NVIC_InitTypeDef NVIC_InitStructure; #ifdef VECT_TAB_RAM /* Set the Vector Table base location at 0x20000000 */ NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); #else /* VECT_TAB_FLASH */ /* Set the Vector Table base location at 0x08000000 */ NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0); #endif /* Configure the NVIC Preemption Priority Bits */ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); /* Enable the USART1 Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQChannel; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } //串口中断 void USART1_IRQHandler(void) { //处理接收到的数据 if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) { /* Clear the USART1 Receive interrupt */ USART_ClearITPendingBit(USART1, USART_IT_RXNE); } //发送中断 if (USART_GetITStatus(USART1, USART_IT_TXE) != RESET) { USART_SendData(USART1, Send_Data[Send_Length++]); if (Send_Length==SEND_LENGTH) { //发送字节结束 USART_ClearITPendingBit(USART1,USART_IT_TXE); USART_ITConfig(USART1, USART_IT_TXE, DISABLE); USART_ITConfig(USART1, USART_IT_TC, ENABLE); } } //发送完成 if (USART_GetITStatus(USART1, USART_IT_TC) != RESET) { USART_ClearITPendingBit(USART1,USART_IT_TC); USART_ITConfig(USART1, USART_IT_TC, DISABLE); } } 在需要发送的程序里Send_Data[SEND_LENGTH]和发送长度设置好, void Send_to_PC(void) { //设置好Send_Data[SEND_LENGTH]数组 //打开发送中断 USART_ITConfig(USART1, USART_IT_TXE, ENABLE); } 至此 串口就可以工作起来了！~