stm32 两块串口通信

STM32是一款微控制器，它可以支持多个串口。如果你要使两块串口相互通信，你需要先配置它们。

首先，你需要设置每个串口的波特率。波特率是指每秒钟发送或接收的数据量。通常情况下，波特率为9600或115200。

接下来，你需要初始化串口。这包括启用串口和设置通信参数。你需要设置数据方向（发送或接收）、数据位数（8位或9位）、校验位和停止位。对于每个串口，你也需要设置相应的中断控制器。

为了实现两块串口之间的通信，你需要在代码中分别设置发送和接收函数。在发送函数中，你需要将数据放入寄存器中，并使能发送。在接收函数中，你需要等待数据到达并保存它。

最后，你需要在代码中编写主程序来控制串口通信。这包括发送数据到另一个串口，等待另一个串口发送数据，以及处理接收到的数据。

总之，通过配置和初始化两块串口，然后编写代码来控制通信，你可以轻松地实现STM32上的串口通信。

相关问题

两块stm32f103单片机串口通信程序

以下是两块stm32f103单片机串口通信程序的示例代码：

发送端代码：

#include "stm32f10x.h"
#include "stm32f10x_usart.h"
#include "stm32f10x_gpio.h"
#include "misc.h"

void USART1_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    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_Tx;
    USART_Init(USART1, &USART_InitStructure);

    USART_ITConfig(USART1, USART_IT_TXE, ENABLE);

    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    USART_Cmd(USART1, ENABLE);
}

void USART1_IRQHandler(void)
{
    if (USART_GetITStatus(USART1, USART_IT_TXE) != RESET)
    {
        USART_SendData(USART1, 'A');
        while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);
    }
}

int main(void)
{
    USART1_Init();

    while (1);

    return 0;
}

接收端代码：

#include "stm32f10x.h"
#include "stm32f10x_usart.h"
#include "stm32f10x_gpio.h"
#include "misc.h"

void USART2_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    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_Init(USART2, &USART_InitStructure);

    USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);

    NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    USART_Cmd(USART2, ENABLE);
}

void USART2_IRQHandler(void)
{
    if (USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)
    {
        char ch = USART_ReceiveData(USART2);
        USART_SendData(USART2, ch);
        while (USART_GetFlagStatus(USART2, USART_FLAG_TC) == RESET);
    }
}

int main(void)
{
    USART2_Init();

    while (1);

    return 0;
}

希望这个示例代码能够帮助你！

两块STM32串口通信传输字符

以下是两块STM32串口通信传输字符的示例代码：

主控板代码：

#include "stm32f10x.h"
#include "stdio.h"

#define USART1_DR_Base  0x40013804
#define USART2_DR_Base  0x40004404

void USART1_Init(void);
void USART1_SendData(char data);
void USART1_SendString(char* str);

void USART2_Init(void);
void USART2_SendData(char data);
void USART2_SendString(char* str);

int main()
{
    // 初始化USART1和USART2
    USART1_Init();
    USART2_Init();

    while (1)
    {
        char data;
        // 从USART1读取数据并发送到USART2
        if (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == SET)
        {
            data = USART_ReceiveData(USART1);
            USART2_SendData(data);
        }

        // 从USART2读取数据并发送到USART1
        if (USART_GetFlagStatus(USART2, USART_FLAG_RXNE) == SET)
        {
            data = USART_ReceiveData(USART2);
            USART1_SendData(data);
        }
    }
}

void USART1_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;

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

    // 配置USART1的Tx引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置USART1的Rx引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置USART1的波特率、字长等
    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;
    USART_Init(USART1, &USART_InitStructure);

    // 使能USART1
    USART_Cmd(USART1, ENABLE);
}

void USART1_SendData(char data)
{
    // 等待发送缓冲区为空
    while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);

    // 发送数据
    USART_SendData(USART1, data);
}

void USART1_SendString(char* str)
{
    // 循环发送字符串
    while (*str)
    {
        USART1_SendData(*str++);
    }
}

void USART2_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;

    // 使能GPIOA和USART2的时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB1Periph_USART2, ENABLE);

    // 配置USART2的Tx引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置USART2的Rx引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置USART2的波特率、字长等
    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;
    USART_Init(USART2, &USART_InitStructure);

    // 使能USART2
    USART_Cmd(USART2, ENABLE);
}

void USART2_SendData(char data)
{
    // 等待发送缓冲区为空
    while (USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET);

    // 发送数据
    USART_SendData(USART2, data);
}

void USART2_SendString(char* str)
{
    // 循环发送字符串
    while (*str)
    {
        USART2_SendData(*str++);
    }
}

从板代码：

#include "stm32f10x.h"
#include "stdio.h"

#define USART1_DR_Base  0x40013804
#define USART2_DR_Base  0x40004404

void USART1_Init(void);
void USART1_SendData(char data);
void USART1_SendString(char* str);

void USART2_Init(void);
void USART2_SendData(char data);
void USART2_SendString(char* str);

int main()
{
    // 初始化USART1和USART2
    USART1_Init();
    USART2_Init();

    while (1)
    {
        char data;
        // 从USART2读取数据并发送到USART1
        if (USART_GetFlagStatus(USART2, USART_FLAG_RXNE) == SET)
        {
            data = USART_ReceiveData(USART2);
            USART1_SendData(data);
        }

        // 从USART1读取数据并发送到USART2
        if (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == SET)
        {
            data = USART_ReceiveData(USART1);
            USART2_SendData(data);
        }
    }
}

void USART1_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;

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

    // 配置USART1的Tx引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置USART1的Rx引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置USART1的波特率、字长等
    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;
    USART_Init(USART1, &USART_InitStructure);

    // 使能USART1
    USART_Cmd(USART1, ENABLE);
}

void USART1_SendData(char data)
{
    // 等待发送缓冲区为空
    while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);

    // 发送数据
    USART_SendData(USART1, data);
}

void USART1_SendString(char* str)
{
    // 循环发送字符串
    while (*str)
    {
        USART1_SendData(*str++);
    }
}

void USART2_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;

    // 使能GPIOA和USART2的时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB1Periph_USART2, ENABLE);

    // 配置USART2的Tx引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置USART2的Rx引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置USART2的波特率、字长等
    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;
    USART_Init(USART2, &USART_InitStructure);

    // 使能USART2
    USART_Cmd(USART2, ENABLE);
}

void USART2_SendData(char data)
{
    // 等待发送缓冲区为空
    while (USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET);

    // 发送数据
    USART_SendData(USART2, data);
}

void USART2_SendString(char* str)
{
    // 循环发送字符串
    while (*str)
    {
        USART2_SendData(*str++);
    }
}