STM32串口3 映射和完全重映射 PB10 PB11 / PD8 PD9 / PC10 PC11

2024-09-30 来源：cnblogs

STM32F103共有五个串口，有时候在项目中，其他的引脚已经配置用了，重新改太麻烦

STM32串口3 映射和完全重映射 PB10 PB11 PD8 PD9 PC10 PC11

所有本次实验使用了串口3的映射端口，配置和普通的类似

只是注意要使用映射使能说明

GPIO_PinRemapConfig(GPIO_FullRemap_USART3 , ENABLE);

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void USART3_Configuration(u32 bound)

{

//GPIO端口设置

GPIO_InitTypeDef GPIO_InitStructure;

USART_InitTypeDef USART_InitStructure;

NVIC_InitTypeDef NVIC_InitStructure;

#if 1

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE); //remap时钟|RCC_APB2Periph_AFIO //开启GPIOB时钟

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);//这里要分开打开 //USART3时钟来自APB1

#endif

#if 0

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);//开启GPIOB和USART3时钟

//USART3_TX GPIOB.10

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //PB.10

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出

GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIOA.10

//USART3_RX GPIOB.11初始化

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;//PB11

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入

GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIOB.11

#endif

#if 0 //重映射

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE); //remap时钟|RCC_APB2Periph_AFIO //开启GPIOB时钟

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);//这里要分开打开 //USART3时钟来自APB1

//GPIO_PartialRemap_USART3 部分重映射 GPIOC_10 GPIOC_11

GPIO_PinRemapConfig(GPIO_PartialRemap_USART3,ENABLE);

//USART3_TX GPIOC.10

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出

GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化

//USART3_RX GPIOC.11初始化

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;//

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入

GPIO_Init(GPIOC, &GPIO_InitStructure);//初始

#endif

#if 1

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE); //remap时钟|RCC_APB2Periph_AFIO //开启GPIOB时钟

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);//这里要分开打开 //USART3时钟来自APB1

//GPIO_FullRemap_USART3 完全重映射 D8 D9

GPIO_PinRemapConfig(GPIO_FullRemap_USART3,ENABLE);

//USART3_TX GPIOD8

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出

GPIO_Init(GPIOD, &GPIO_InitStructure);//初始化

//USART3_RX GPIOD9

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;//

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入

GPIO_Init(GPIOD, &GPIO_InitStructure);//初始

#endif

//Usart3 NVIC 配置

NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1 ;//抢占优先级3

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //子优先级3

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能

NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器

//USART 初始化设置

USART_InitStructure.USART_BaudRate = bound;//串口波特率

USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式

USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位

USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位

USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制

USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式

USART_Init(USART3, &USART_InitStructure); //初始化串口3

USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);//开启串口接受中断

USART_Cmd(USART3, ENABLE); //使能串口3

}

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#include 'sys.h'

#include 'usart.h'

#include 'timer.h'

#include 'stdint.h'

u8 checkdata[8]; //检测串口1接收的特定数据数据

//发送上位机的数据

uint32_t crc16_data1[] = { 0x00,0x00, 0x00 };//饮水机数据

uint32_t crc16_data2[] = { 0x00,0x00, 0x00 };//

uint32_t crc16_data3[] = { 0x00,0x00, 0x00 };//

uint32_t crc16_data4[] = { 0x00,0x00, 0x00 };//

uint32_t crc16_data5[] = { 0x00,0x00, 0x00 };//

uint32_t crc16_data6[] = { 0x00,0x00, 0x00 };//

uint32_t crc16_data7[] = { 0x00,0x00, 0x00 };//

uint32_t crc16_data8[] = { 0x00,0x00, 0x00 };//

uint32_t crc16_data9[] = { 0x00,0x00, 0x00 };//

uint32_t crc16_data10[]= { 0x00,0x00, 0x00 };//

//串口1队列定义

u8 UART1SendBuff[UART1BuffSize]; //发送数据

u8 UART1ReceBuff[UART1BuffSize]; //接收数据？

u16 UART1ReceIn = 0;//接收状态标记数据位

u8 UART1ReceFullFlag = 0;//接收完数据标志位

//串口3队列定义

u8 UART3SendBuff[UART3BuffSize]; //发送数据

u8 UART3ReceBuff[UART3BuffSize]; //接收数据？

u16 UART3ReceIn = 0;//接收状态标记数据位

u8 UART3ReceFullFlag = 0;//接收完数据标志位

void USART1_Configuration(u32 bound){

//GPIO端口设置

GPIO_InitTypeDef GPIO_InitStructure;

USART_InitTypeDef USART_InitStructure;

NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE); //使能USART1，GPIOA时钟

//USART1_TX GPIOA.9

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出

GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.9

//USART1_RX GPIOA.10初始化

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//PA10

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入

GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.10

//Usart1 NVIC 配置

NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;//抢占优先级3

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //子优先级3

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能

NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器

//USART 初始化设置

USART_InitStructure.USART_BaudRate = bound;//串口波特率

USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式

USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位

USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位

USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制

USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式

USART_Init(USART1, &USART_InitStructure); //初始化串口1

USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启串口接受中断

USART_Cmd(USART1, ENABLE); //使能串口1

}

void USART3_Configuration(u32 bound)

{

//GPIO端口设置

GPIO_InitTypeDef GPIO_InitStructure;

USART_InitTypeDef USART_InitStructure;

NVIC_InitTypeDef NVIC_InitStructure;

#if 1

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE); //remap时钟|RCC_APB2Periph_AFIO //开启GPIOB时钟

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);//这里要分开打开 //USART3时钟来自APB1

#endif

#if 0

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);//开启GPIOB和USART3时钟

//USART3_TX GPIOB.10

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //PB.10

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出

GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIOA.10

//USART3_RX GPIOB.11初始化

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;//PB11

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入

GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIOB.11

#endif

#if 0 //重映射

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE); //remap时钟|RCC_APB2Periph_AFIO //开启GPIOB时钟

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);//这里要分开打开 //USART3时钟来自APB1

//GPIO_PartialRemap_USART3 部分重映射 GPIOC_10 GPIOC_11

GPIO_PinRemapConfig(GPIO_PartialRemap_USART3,ENABLE);

//USART3_TX GPIOC.10

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出

GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化

//USART3_RX GPIOC.11初始化

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;//

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入

GPIO_Init(GPIOC, &GPIO_InitStructure);//初始

#endif

#if 1

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE); //remap时钟|RCC_APB2Periph_AFIO //开启GPIOB时钟

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);//这里要分开打开 //USART3时钟来自APB1

//GPIO_FullRemap_USART3 完全重映射 D8 D9

GPIO_PinRemapConfig(GPIO_FullRemap_USART3,ENABLE);

//USART3_TX GPIOD8

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出

GPIO_Init(GPIOD, &GPIO_InitStructure);//初始化

//USART3_RX GPIOD9

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;//

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入

GPIO_Init(GPIOD, &GPIO_InitStructure);//初始

#endif

//Usart3 NVIC 配置

NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1 ;//抢占优先级3

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //子优先级3

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能

NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器

//USART 初始化设置

USART_InitStructure.USART_BaudRate = bound;//串口波特率

USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式

USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位

USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位

USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制

USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式

USART_Init(USART3, &USART_InitStructure); //初始化串口3

USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);//开启串口接受中断

USART_Cmd(USART3, ENABLE); //使能串口3

}

//串口1发送一帧数据

void USART1_SendOneData(uint32_t SendOneData)

{

USART_SendData(USART1, SendOneData);

while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)

{}

}

//串口2发送一帧数据

void USART2_SendOneData(uint32_t SendOneData)

{

USART_SendData(USART2, SendOneData);

while (USART_GetFlagStatus(USART2, USART_FLAG_TC) == RESET)

{}

}

//串口3发送一帧数据

void USART3_SendOneData(uint32_t SendOneData)

{

USART_SendData(USART3, SendOneData);

while (USART_GetFlagStatus(USART3, USART_FLAG_TC) == RESET)

{}

}

//串口1发送一列数据

void USART1_SendUnfixedData(uint32_t *Buffer, uint8_t Length)

{

uint8_t i;

for(i=0;i {

USART1_SendOneData(*Buffer++);

}

//串口2发送一列数据

void USART2_SendUnfixedData(uint32_t *Buffer, uint8_t Length)

{

uint8_t i;

for(i=0;i {

USART2_SendOneData(*Buffer++);

}

//串口3发送一列数据

void USART3_SendUnfixedData(uint32_t *Buffer, uint8_t Length)

{

uint8_t i;

for(i=0;i {

USART3_SendOneData(*Buffer++);

}

//串口1中断服务函数

void USART1_IRQHandler(void)

{

u8 Res;//数据暂存

if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //接收中断

{

Res =USART_ReceiveData(USART1); //读取接收到的数据

switch(UART1ReceIn)//读取接收到的数据有几位每一位对应的数据协议校验

{

case 0:

if(Res==0xFE)

UART1ReceBuff[UART1ReceIn++] = Res;

else

UART1ReceIn = 0;

break;

case 1:

if(Res==0xFE)

UART1ReceBuff[UART1ReceIn++] = Res;

else

UART1ReceIn = 0;

break;

case 2://此处为判断数据的位置正反转

// if(Res==0x02)//在其他位置判断数据

// {UART1ReceBuff[UART1ReceIn++] = Res;

// checkdata[0]=UART1ReceBuff[2];}

{UART1ReceBuff[UART1ReceIn++] = Res;

checkdata[0]=UART1ReceBuff[2];

}

break;

case 3://此处为判断数据的位置旋转角度

// if(Res==0x02)//在其他位置判断数据

// {UART1ReceBuff[UART1ReceIn++] = Res;

// checkdata[0]=UART1ReceBuff[2];}

{UART1ReceBuff[UART1ReceIn++] = Res;

checkdata[1]=UART1ReceBuff[3]; //接收到的角度数据和实际齿轮数据不一致

}

break;

case 4:

if(Res==0xFD)

UART1ReceBuff[UART1ReceIn++] = Res;

else

UART1ReceIn = 0;

break;

case 5:

if(Res==0xFD)

UART1ReceBuff[UART1ReceIn++] = Res;

else

UART1ReceIn = 0;

break;

default:

UART1ReceBuff[UART1ReceIn++] = Res;

break;

}

if(UART1ReceIn >= 5)

{

UART1ReceFullFlag = 1; //数据完整接受完

UART1ReceIn = 0;

timer8flag=0;

}

// USART_ClearFlag(USART1, USART_IT_RXNE);//清除相对应的中断位清除中断预处理位USART_ClearITPendingBit左移八位是USART_ClearFlag

USART_ClearITPendingBit(USART1, USART_IT_RXNE);//清除相对应的中断位清除中断预处理位USART_ClearITPendingBit左移八位是USART_ClearFlag

}

if(USART_GetITStatus(USART1, USART_IT_TXE) != RESET) // 发送中断 USART_GetITStatus

{

// USART_ClearFlag(USART1, USART_IT_TXE); // clear interrupt 清除中断预处理位

USART_ClearITPendingBit(USART1, USART_IT_TXE); // clear interrupt 清除中断预处理位

}

// if(USART_GetFlagStatus(USART1, USART_FLAG_ORE) != RESET)

// {

// USART_ClearFlag(USART1, USART_FLAG_ORE);

// }

}

//串口3中断服务函数

void USART3_IRQHandler(void)

{

u8 Res;//数据暂存

if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET) //接收中断

{

Res =USART_ReceiveData(USART3); //读取接收到的数据 USART_ReceiveData

USART_SendData(USART1,Res);//将读取到的数据通过串口1发送

switch(UART3ReceIn)//读取接收到的数据有几位每一位对应的数据协议校验

{

case 0:

if(Res==0XFE)

UART3ReceBuff[UART3ReceIn++] = Res;

else

UART3ReceIn = 0;

break;

case 10:

if(Res==0xFF)

UART3ReceBuff[UART3ReceIn++] = Res;

else

UART3ReceIn = 0;

break;

default:

UART3ReceBuff[UART3ReceIn++] = Res;

break;

}

if(UART3ReceIn >= 11)

{

UART3ReceFullFlag = 1; //数据完整接受完

}

USART_ClearITPendingBit(USART3, USART_IT_RXNE);//清除相对应的中断位清除中断预处理位USART_ClearITPendingBit左移八位是USART_ClearFlag

}

else if(USART_GetITStatus(USART3, USART_IT_TXE) != RESET) // 发送中断 USART_GetITStatus

{

USART_ClearITPendingBit(USART3, USART_IT_TXE); // clear interrupt 清除中断预处理位

}

void send_data()

{

//刷新位置信息

if(timer8flag100ms==1)

{

timer8flag100ms=0;

//发送协议头 FE FE D1

USART_SendData(USART1,0xFA);//向串口1发送数据