stm32串口触摸屏代码、

以下是一个基于STM32的串口触摸屏代码示例：

#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "stm32f10x.h"

#define USART1_DR_Base 0x40013804

#define USART_RX_BUF_SIZE 64

uint8_t USART_RX_BUF[USART_RX_BUF_SIZE];  //串口接收缓冲区
uint8_t USART_RX_STA = 0;  //接收状态标记

//串口1初始化
void USART1_Init(u32 bound)
{
    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   PA.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PA9

    //USART1_RX   PA.10
    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PA10

    //Usart1 NVIC 配置
    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;  //USART1中断
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;  //抢占优先级3
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;  //子优先级3
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
    NVIC_Init(&NVIC_InitStructure);  //初始化NVIC

    //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
}

//串口1中断服务程序
void USART1_IRQHandler(void)
{
    uint8_t Res;

    if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)  //接收中断
    {
        Res = USART_ReceiveData(USART1);//(USART1->DR);	//读取接收到的数据

        if ((USART_RX_STA & 0x8000) == 0) //接收未完成
        {
            if (USART_RX_STA & 0x4000) //接收到了0x0d
            {
                if (Res != 0x0a)USART_RX_STA = 0; //接收错误,重新开始
                else USART_RX_STA |= 0x8000; //接收完成了
            }
            else //还没收到0X0D
            {
                if (Res == 0x0d)USART_RX_STA |= 0x4000;
                else
                {
                    USART_RX_BUF[USART_RX_STA & 0X3FFF] = Res ;
                    USART_RX_STA++;
                    if (USART_RX_STA > (USART_RX_BUF_SIZE - 1))USART_RX_STA = 0;//接收数据错误,重新开始接收
                }
            }
        }
    }
}

//向串口1发送一个字节数据
void USART1_SendByte(uint8_t txdata)
{
    while((USART1->SR&0X40)==0);//等待上一次发送完毕
    USART_SendData(USART1, txdata);
}

//向串口1发送字符串
void USART1_SendString(char* str)
{
    uint16_t len = strlen(str);
    for (uint16_t i = 0; i < len; i++)
    {
        USART1_SendByte(*(str + i));
    }
}

//发送触摸屏指令
void TouchScreen_SendCommand(uint8_t *cmd, uint16_t cmdlen)
{
    USART1_SendByte(0x55);  //帧头
    USART1_SendByte(0xff);  //帧头
    USART1_SendByte(0xff);  //帧头

    for (uint16_t i = 0; i < cmdlen; i++)  //发送指令
    {
        USART1_SendByte(*(cmd + i));
    }

    USART1_SendByte(0x00);  //校验和
}

//触摸屏初始化
void TouchScreen_Init(void)
{
    uint8_t cmd1[6] = {0x00, 0x38, 0x00, 0x00, 0x00, 0x00};  //查询芯片ID指令
    uint8_t cmd2[6] = {0x00, 0x20, 0x00, 0x02, 0x0d, 0x4e};  //设置坐标读取模式指令

    TouchScreen_SendCommand(cmd1, 6);  //查询芯片ID
    TouchScreen_SendCommand(cmd2, 6);  //设置坐标读取模式
}

//从串口1接收一个字节数据
uint8_t USART1_RecvByte(void)
{
    while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
    return USART_ReceiveData(USART1);
}

//获取触摸屏坐标
void Get_TouchScreen(uint16_t *x, uint16_t *y)
{
    uint8_t cmd[6] = {0x00, 0xd0, 0x00, 0x00, 0x00, 0x00};  //读取坐标指令
    uint8_t buf[4] = {0};

    TouchScreen_SendCommand(cmd, 6);  //发送读取坐标指令

    for (uint8_t i = 0; i < 4; i++)  //等待接收数据
    {
        buf[i] = USART1_RecvByte();
    }

    *x = buf[1] << 8 | buf[0];
    *y = buf[3] << 8 | buf[2];
}

int main(void)
{
    USART1_Init(115200);  //初始化串口1
    TouchScreen_Init();  //初始化触摸屏

    while (1)
    {
        uint16_t x = 0, y = 0;
        Get_TouchScreen(&x, &y);

        printf("x: %d, y: %d\r\n", x, y);  //打印坐标到串口
    }
}

此代码实现了通过STM32的串口1与触摸屏进行通信，读取触摸屏的坐标信息，并通过串口打印输出坐标信息。