STM32的串口中断配置

电子工程师 2018-04-06 12753

电子说

1.3w人已加入

描述

STM32的串口中断配置,也是很简单的.

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！~

打开APP阅读更多精彩内容