STM32L151 DMA+UART空閑中斷收發(fā)數(shù)據(jù)

ID:573999 · 發(fā)表于 2025-8-24 10:32

#ifndef __BSP_UART_H
#define __BSP_UART_H

#define USART1_TX_LEN 1024
#define USART1_RX_LEN 1024

#define USART2_TX_LEN 1024
#define USART2_RX_LEN 1024

#define USART3_TX_LEN 1024
#define USART3_RX_LEN 1024

void Uart1_Init(void);
void Uart1_DMA_TxConfig(uint8_t TransSize);
void Uart1_DMA_RxConfig(void);

void Uart2_Init(void);
void Uart2_DMA_TxConfig(uint8_t TransSize);
void Uart2_DMA_RxConfig(void);

void Uart3_Init(void);
void Uart3_DMA_TxConfig(uint8_t TransSize);
void Uart3_DMA_RxConfig(void);

#endif
//接收緩存區(qū)
uint8_t Uart1_Rx_Flag;//接收到數(shù)據(jù)請求標(biāo)志
uint8_t Uart1_Rx_Buf[USART1_RX_LEN];//接收緩沖,最USART1_RX_LEN個字節(jié)
//發(fā)送緩存區(qū)
uint8_t Uart1_Tx_Buf[USART1_TX_LEN];//發(fā)送緩沖,最USART1_TX_LEN個字節(jié)

uint16_t Uart1_ReceiveSize;

//接收緩存區(qū)
uint8_t Uart2_Rx_Flag;//接收到數(shù)據(jù)請求標(biāo)志
uint8_t Uart2_Rx_Buf[USART2_RX_LEN];//接收緩沖,最USART1_RX_LEN個字節(jié)
//發(fā)送緩存區(qū)
uint8_t Uart2_Tx_Buf[USART2_TX_LEN];//發(fā)送緩沖,最USART1_TX_LEN個字節(jié)

uint16_t Uart2_ReceiveSize;

//接收緩存區(qū)
uint8_t Uart3_Rx_Flag;//接收到數(shù)據(jù)請求標(biāo)志
uint8_t Uart3_Rx_Buf[USART3_RX_LEN];//接收緩沖,最USART1_RX_LEN個字節(jié)
//發(fā)送緩存區(qū)
uint8_t Uart3_Tx_Buf[USART3_TX_LEN];//發(fā)送緩沖,最USART1_TX_LEN個字節(jié)

uint16_t Uart3_ReceiveSize;
/**
  * @brief  Configures the UART1.
  * @param  None
  * @retval None
  */
static void UART1_Configuration(void)
{
GPIO_InitTypeDef  GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);//使能GPIOA時鐘

//打開 UART 時鐘
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
//Enable DMA1 clock
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);

GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_USART1);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_USART1);
//USART1_TX PA9
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //復(fù)用推挽輸出
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化PA9

//USART1_RX    PA10
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_Init(GPIOA, &GPIO_InitStructure);  //初始化PA10

//配置串口硬件參數(shù)
USART_InitStructure.USART_BaudRate = 115200;//波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1_5;
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);
}

/**
  * @brief  Configures the UART2.
  * @param  None
  * @retval None
  */
static void UART2_Configuration(void)
{
GPIO_InitTypeDef  GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);//使能GPIOA時鐘

//打開 UART 時鐘
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
//Enable DMA1 clock
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);

GPIO_PinAFConfig(GPIOA,GPIO_PinSource2,GPIO_AF_USART2);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource3,GPIO_AF_USART2);
//USART2_TX PA2
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //復(fù)用推挽輸出
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化PA2

//USART2_RX    PA3
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_Init(GPIOA, &GPIO_InitStructure);  //初始化PA3

//配置串口硬件參數(shù)
USART_InitStructure.USART_BaudRate = 115200;//波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1_5;
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(USART2, &USART_InitStructure);
}
/**
  * @brief  Configures the UART3.
  * @param  None
  * @retval None
  */
static void UART3_Configuration(void)
{
GPIO_InitTypeDef  GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);//使能GPIOB時鐘

//打開 UART 時鐘
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
//Enable DMA1 clock
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);

GPIO_PinAFConfig(GPIOB,GPIO_PinSource10,GPIO_AF_USART3);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource11,GPIO_AF_USART3);
//USART3_TX PB10
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //復(fù)用推挽輸出
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure); //初始化PB10

//USART3_RX    PB11
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_Init(GPIOB, &GPIO_InitStructure);  //初始化PB11

//配置串口硬件參數(shù)
USART_InitStructure.USART_BaudRate = 115200;//波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1_5;
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(USART3, &USART_InitStructure);
}

/**
  * @brief  初始化CPU的USART1串口硬件設(shè)備
  * @param  None
  * @retval None
  */
void Uart1_Init(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

UART1_Configuration();

//設(shè)置中斷
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

//配置串口中斷
USART_ITConfig(USART1, USART_IT_RXNE, DISABLE);
USART_ITConfig(USART1, USART_IT_TC, DISABLE);
USART_ITConfig(USART1, USART_IT_TXE,  DISABLE);

USART_ITConfig(USART1, USART_IT_IDLE, ENABLE);//使能IDLE中斷

USART_Cmd(USART1, ENABLE);
USART_ClearFlag(USART1, USART_FLAG_TC);//清發(fā)送完成標(biāo)志，Transmission Complete flag
}
/**
  * @brief  初始化CPU的USART2串口硬件設(shè)備
  * @param  None
  * @retval None
  */
void Uart2_Init(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

UART2_Configuration();

//設(shè)置中斷
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
//配置串口中斷
USART_ITConfig(USART2, USART_IT_RXNE, DISABLE);
USART_ITConfig(USART2, USART_IT_TC, DISABLE);
USART_ITConfig(USART2, USART_IT_TXE,  DISABLE);

USART_ITConfig(USART2, USART_IT_IDLE, ENABLE);//使能IDLE中斷

USART_Cmd(USART2, ENABLE);
USART_ClearFlag(USART2, USART_FLAG_TC);//清發(fā)送完成標(biāo)志，Transmission Complete flag
}
/**
  * @brief  初始化CPU的USART3串口硬件設(shè)備
  * @param  None
  * @retval None
  */
void Uart3_Init(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

UART3_Configuration();

//設(shè)置中斷
NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
//配置串口中斷
USART_ITConfig(USART3, USART_IT_RXNE, DISABLE);
USART_ITConfig(USART3, USART_IT_TC, DISABLE);
USART_ITConfig(USART3, USART_IT_TXE,  DISABLE);

USART_ITConfig(USART3, USART_IT_IDLE, ENABLE);//使能IDLE中斷

USART_Cmd(USART3, ENABLE);
USART_ClearFlag(USART3, USART_FLAG_TC);//清發(fā)送完成標(biāo)志，Transmission Complete flag
}

//
void Uart1_DMA_TxConfig(uint8_t TransSize)
{
DMA_InitTypeDef  DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

DMA_DeInit(DMA1_Channel4);

//DMA外設(shè)USART1基地址
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&USART1->DR);
//DMA內(nèi)存基地址
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)Uart1_Tx_Buf;
//外設(shè)作為數(shù)據(jù)傳輸?shù)哪康牡?nbsp;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
//DMA通道的DMA緩存的大小
DMA_InitStructure.DMA_BufferSize = TransSize;
//外設(shè)地址寄存器不變
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
//內(nèi)存地址寄存器遞增
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
//數(shù)據(jù)寬度為8位
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
//數(shù)據(jù)寬度為8位
DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_Byte;
//工作在正常模式
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
//DMA通道 x擁有高優(yōu)先級
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
//
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

//根據(jù)DMA_InitStruct中指定的參數(shù)初始化DMA的通道
DMA_Init(DMA1_Channel4, &DMA_InitStructure);

DMA_ITConfig(DMA1_Channel4, DMA_IT_TC, ENABLE);
//使能 USART DMA TX 請求
USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE);

//使能 DMA Stream 中斷通道
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

//Enable DMA1_Channel4
DMA_Cmd(DMA1_Channel4, DISABLE);
}
//
void Uart2_DMA_TxConfig(uint8_t TransSize)
{
DMA_InitTypeDef  DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

DMA_DeInit(DMA1_Channel7);

//DMA外設(shè)USART1基地址
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&USART2->DR);
//DMA內(nèi)存基地址
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)Uart2_Tx_Buf;
//外設(shè)作為數(shù)據(jù)傳輸?shù)哪康牡?nbsp;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
//DMA通道的DMA緩存的大小
DMA_InitStructure.DMA_BufferSize = TransSize;
//外設(shè)地址寄存器不變
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
//內(nèi)存地址寄存器遞增
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
//數(shù)據(jù)寬度為8位
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
//數(shù)據(jù)寬度為8位
DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_Byte;
//工作在正常模式
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
//DMA通道 x擁有高優(yōu)先級
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
//
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

//根據(jù)DMA_InitStruct中指定的參數(shù)初始化DMA的通道
DMA_Init(DMA1_Channel7, &DMA_InitStructure);

DMA_ITConfig(DMA1_Channel7, DMA_IT_TC, ENABLE);
//使能 USART DMA TX 請求
USART_DMACmd(USART2, USART_DMAReq_Tx, ENABLE);

//使能 DMA Stream 中斷通道
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel7_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

//Enable DMA1_Channel
DMA_Cmd(DMA1_Channel7, DISABLE);
}
//
void Uart3_DMA_TxConfig(uint8_t TransSize)
{
DMA_InitTypeDef  DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

DMA_DeInit(DMA1_Channel2);

//DMA外設(shè)USART1基地址
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&USART3->DR);
//DMA內(nèi)存基地址
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)Uart3_Tx_Buf;
//外設(shè)作為數(shù)據(jù)傳輸?shù)哪康牡?nbsp;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
//DMA通道的DMA緩存的大小
DMA_InitStructure.DMA_BufferSize = TransSize;
//外設(shè)地址寄存器不變
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
//內(nèi)存地址寄存器遞增
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
//數(shù)據(jù)寬度為8位
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
//數(shù)據(jù)寬度為8位
DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_Byte;
//工作在正常模式
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
//DMA通道 x擁有高優(yōu)先級
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
//
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

//根據(jù)DMA_InitStruct中指定的參數(shù)初始化DMA的通道
DMA_Init(DMA1_Channel2, &DMA_InitStructure);

DMA_ITConfig(DMA1_Channel2, DMA_IT_TC, ENABLE);
//使能 USART DMA TX 請求
USART_DMACmd(USART3, USART_DMAReq_Tx, ENABLE);

//使能 DMA Stream 中斷通道
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

//Enable DMA1_Channel
DMA_Cmd(DMA1_Channel2, DISABLE);
}
//
void Uart1_DMA_RxConfig(void)
{
DMA_InitTypeDef  DMA_InitStructure;

//DMA1的通道配置
DMA_DeInit(DMA1_Channel5);

//DMA外設(shè)USART1基地址
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&USART1->DR);
//DMA內(nèi)存基地址
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)Uart1_Rx_Buf;
//內(nèi)存作為數(shù)據(jù)傳輸?shù)哪康牡?br /> DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
//DMA通道的DMA緩存的大小
DMA_InitStructure.DMA_BufferSize = USART1_RX_LEN;
//外設(shè)地址寄存器不變
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
//內(nèi)存地址寄存器遞增
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
//數(shù)據(jù)寬度為8位
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
//數(shù)據(jù)寬度為8位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
//工作在正常模式
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
//DMA通道 x擁有中優(yōu)先級
DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
//
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

//根據(jù)DMA_InitStruct中指定的參數(shù)初始化DMA的通道
DMA_Init(DMA1_Channel5, &DMA_InitStructure);
//使能 USART DMA RX 請求
USART_DMACmd(USART1, USART_DMAReq_Rx, ENABLE);

DMA_ITConfig(DMA1_Channel5,DMA_IT_TC,ENABLE);
//Enable DMA1_Channel5
DMA_Cmd(DMA1_Channel5,ENABLE);

}

//
void Uart2_DMA_RxConfig(void)
{
DMA_InitTypeDef  DMA_InitStructure;

//DMA1的通道配置
DMA_DeInit(DMA1_Channel6);

//DMA外設(shè)USART1基地址
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&USART2->DR);
//DMA內(nèi)存基地址
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)Uart2_Rx_Buf;
//內(nèi)存作為數(shù)據(jù)傳輸?shù)哪康牡?br /> DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
//DMA通道的DMA緩存的大小
DMA_InitStructure.DMA_BufferSize = USART2_RX_LEN;
//外設(shè)地址寄存器不變
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
//內(nèi)存地址寄存器遞增
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
//數(shù)據(jù)寬度為8位
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
//數(shù)據(jù)寬度為8位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
//工作在正常模式
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
//DMA通道 x擁有中優(yōu)先級
DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
//
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

//根據(jù)DMA_InitStruct中指定的參數(shù)初始化DMA的通道
DMA_Init(DMA1_Channel6, &DMA_InitStructure);
//使能 USART DMA RX 請求
USART_DMACmd(USART2, USART_DMAReq_Rx, ENABLE);

DMA_ITConfig(DMA1_Channel6,DMA_IT_TC,ENABLE);
//Enable DMA1_Channel
DMA_Cmd(DMA1_Channel6,ENABLE);

}

//
void Uart3_DMA_RxConfig(void)
{
DMA_InitTypeDef  DMA_InitStructure;

//DMA1的通道配置
DMA_DeInit(DMA1_Channel3);

//DMA外設(shè)USART1基地址
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&USART3->DR);
//DMA內(nèi)存基地址
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)Uart3_Rx_Buf;
//內(nèi)存作為數(shù)據(jù)傳輸?shù)哪康牡?br /> DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
//DMA通道的DMA緩存的大小
DMA_InitStructure.DMA_BufferSize = USART3_RX_LEN;
//外設(shè)地址寄存器不變
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
//內(nèi)存地址寄存器遞增
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
//數(shù)據(jù)寬度為8位
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
//數(shù)據(jù)寬度為8位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
//工作在正常模式
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
//DMA通道 x擁有中優(yōu)先級
DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
//
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

//根據(jù)DMA_InitStruct中指定的參數(shù)初始化DMA的通道
DMA_Init(DMA1_Channel3, &DMA_InitStructure);
//使能 USART DMA RX 請求
USART_DMACmd(USART3, USART_DMAReq_Rx, ENABLE);

DMA_ITConfig(DMA1_Channel3,DMA_IT_TC,ENABLE);
//Enable DMA1_Channel
DMA_Cmd(DMA1_Channel3,ENABLE);

}
/*
*********************************************************************************************************
* 函數(shù) 名: DMA1_Channel4_IRQHandler
* 功能說明: 串口1在DMA方式下的發(fā)送中斷
* 形參: 無
* 返回值: 無
*********************************************************************************************************
*/
void DMA1_Channel4_IRQHandler(void)
{

if(DMA_GetITStatus(DMA1_IT_TC4)==SET) //UART Trans Complete
{
DMA_ClearFlag(DMA1_FLAG_TC4);
//DataHold=0;
DMA_Cmd(DMA1_Channel4, DISABLE);
}
}
/*
*********************************************************************************************************
* 函數(shù) 名: DMA1_Channel7_IRQHandler
* 功能說明: 串口2在DMA方式下的發(fā)送中斷
* 形參: 無
* 返回值: 無
*********************************************************************************************************
*/
void DMA1_Channel7_IRQHandler(void)
{

if(DMA_GetITStatus(DMA1_IT_TC7)==SET) //UART Trans Complete
{
DMA_ClearFlag(DMA1_FLAG_TC7);
//DataHold=0;
DMA_Cmd(DMA1_Channel7, DISABLE);
}
}
/*
*********************************************************************************************************
* 函數(shù) 名: DMA1_Channel2_IRQHandler
* 功能說明: 串口3在DMA方式下的發(fā)送中斷
* 形參: 無
* 返回值: 無
*********************************************************************************************************
*/
void DMA1_Channel2_IRQHandler(void)
{

if(DMA_GetITStatus(DMA1_IT_TC2)==SET) //UART Trans Complete
{
DMA_ClearFlag(DMA1_FLAG_TC2);
//DataHold=0;
DMA_Cmd(DMA1_Channel2, DISABLE);
}
}
/*
*********************************************************************************************************
* 函數(shù) 名: USART1_IRQHandler
* 功能說明: 串口1空閑中斷
* 形參: 無
* 返回值: 無
* IDLE要由軟件序列清除依次讀取USART1->SR和USART1->DR
*********************************************************************************************************
*/
void USART1_IRQHandler(void)
{
uint16_t tmp;
if(USART_GetITStatus(USART1,USART_IT_IDLE) != RESET)
{
DMA_Cmd(DMA1_Channel5, DISABLE); //關(guān)閉DMA,防止處理其間有數(shù)據(jù)

tmp = USART1->SR;
tmp = USART1->DR;
tmp++;

Uart1_ReceiveSize =USART1_RX_LEN - DMA_GetCurrDataCounter(DMA1_Channel5);
if(Uart1_ReceiveSize!=0)
Uart1_Rx_Flag=1;
DMA_ClearFlag(DMA1_FLAG_GL5 | DMA1_FLAG_TC5 | DMA1_FLAG_HT5 | DMA1_FLAG_TE5);//清DMA1_Channel5傳輸完成標(biāo)志
DMA_SetCurrDataCounter(DMA1_Channel5, USART1_RX_LEN);
DMA_Cmd(DMA1_Channel5, ENABLE);    //打開DMA,防止處理其間有數(shù)據(jù)
}
}
/*
*********************************************************************************************************
* 函數(shù) 名: USART2_IRQHandler
* 功能說明: 串口2空閑中斷
* 形參: 無
* 返回值: 無
* IDLE要由軟件序列清除依次讀取USART2->SR和USART2->DR
*********************************************************************************************************
*/
void USART2_IRQHandler(void)
{
uint16_t tmp;
if(USART_GetITStatus(USART2,USART_IT_IDLE) != RESET)
{
DMA_Cmd(DMA1_Channel6, DISABLE); //關(guān)閉DMA,防止處理其間有數(shù)據(jù)

tmp = USART2->SR;
tmp = USART2->DR;
tmp++;

Uart2_ReceiveSize =USART2_RX_LEN - DMA_GetCurrDataCounter(DMA1_Channel6);
if(Uart2_ReceiveSize!=0)
Uart2_Rx_Flag=1;
DMA_ClearFlag(DMA1_FLAG_GL6 | DMA1_FLAG_TC6 | DMA1_FLAG_HT6 | DMA1_FLAG_TE6);//清DMA1_Channel6傳輸完成標(biāo)志
DMA_SetCurrDataCounter(DMA1_Channel6, USART2_RX_LEN);
DMA_Cmd(DMA1_Channel6, ENABLE);    //打開DMA,防止處理其間有數(shù)據(jù)
}
}
/*
*********************************************************************************************************
* 函數(shù) 名: USART3_IRQHandler
* 功能說明: 串口3空閑中斷
* 形參: 無
* 返回值: 無
* IDLE要由軟件序列清除依次讀取USART3->SR和USART3->DR
*********************************************************************************************************
*/
void USART3_IRQHandler(void)
{
uint16_t tmp;
if(USART_GetITStatus(USART3,USART_IT_IDLE) != RESET)
{
DMA_Cmd(DMA1_Channel3, DISABLE); //關(guān)閉DMA,防止處理其間有數(shù)據(jù)

tmp = USART3->SR;
tmp = USART3->DR;
tmp++;

Uart3_ReceiveSize =USART3_RX_LEN - DMA_GetCurrDataCounter(DMA1_Channel3);
if(Uart3_ReceiveSize!=0)
Uart3_Rx_Flag=1;
DMA_ClearFlag(DMA1_FLAG_GL3 | DMA1_FLAG_TC3 | DMA1_FLAG_HT3 | DMA1_FLAG_TE3);//清DMA1_Channel3傳輸完成標(biāo)志
DMA_SetCurrDataCounter(DMA1_Channel3, USART3_RX_LEN);
DMA_Cmd(DMA1_Channel3, ENABLE);    //打開DMA,防止處理其間有數(shù)據(jù)
}
}
/**********************************************(END OF FILE)**********************************************/

//初始化示例,使用前必須調(diào)用
Uart1_Init();
Uart1_DMA_TxConfig(40);
Uart1_DMA_RxConfig();

Uart2_Init();
Uart2_DMA_TxConfig(40);
Uart2_DMA_RxConfig();

Uart3_Init();
Uart3_DMA_TxConfig(40);
Uart3_DMA_RxConfig();

//Uart Echo Test
/*Uart Data*/
void Uart_Data_Process(void)
{
uint16_t i;

if(Uart1_Rx_Flag==1)
{
Uart1_Rx_Flag=0;

for(i=0;i<Uart1_ReceiveSize;i++)
Uart1_Tx_Buf[i]=Uart1_Rx_Buf[i];
DMA_SetCurrDataCounter(DMA1_Channel4,Uart1_ReceiveSize);
DMA_Cmd(DMA1_Channel4, ENABLE);

}

if(Uart2_Rx_Flag==1)
{
Uart2_Rx_Flag=0;

for(i=0;i<Uart2_ReceiveSize;i++)
Uart2_Tx_Buf[i]=Uart2_Rx_Buf[i];
DMA_SetCurrDataCounter(DMA1_Channel7,Uart2_ReceiveSize);
DMA_Cmd(DMA1_Channel7, ENABLE);

}

if(Uart3_Rx_Flag==1)
{
Uart3_Rx_Flag=0;

for(i=0;i<Uart3_ReceiveSize;i++)
Uart3_Tx_Buf[i]=Uart3_Rx_Buf[i];
DMA_SetCurrDataCounter(DMA1_Channel2,Uart3_ReceiveSize);
DMA_Cmd(DMA1_Channel2, ENABLE);

}
}

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STM32L151 DMA+UART空閑中斷收發(fā)數(shù)據(jù)

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