#include "stm32f4xx.h" #define LCD_WIDTH 240 #define LCD_HEIGHT 320 void LCD_Init(void) { // 初始化LCD // ... } void LCD_DrawPixel(uint16_t x, uint16_t y, uint16_t color) { // 绘制一个像素点 // ... } void EdgeScan(void) { uint16_t x, y; LCD_Init(); for (x = 0; x < LCD_WIDTH; x++) { for (y = 0; y < LCD_HEIGHT; y++) { if (x == 0 || x == LCD_WIDTH - 1 || y == 0 || y == LCD_HEIGHT - 1) { // 绘制边缘点 LCD_DrawPixel(x, y, 0xFFFF); } } } } int main(void) { EdgeScan(); while (1) { // 无限循环 } }补充完整

这段代码是基于STM32F4系列的MCU，通过驱动LCD屏幕进行图形边缘扫描。请注意，这里的`LCD_Init`和`LCD_DrawPixel`函数是占位函数，需要根据实际情况进行实现。

你需要根据自己使用的具体LCD屏幕和接口，实现`LCD_Init`和`LCD_DrawPixel`函数。这些函数的具体实现可能涉及到与LCD屏幕的通信协议（如SPI、I2C等），以及对LCD屏幕的控制信号（如片选、复位等）的操作。

此外，你还需要配置MCU的时钟和引脚等相关设置，具体设置方法可以参考STM32F4系列的官方文档和相关资料。

另外，这段代码是一个简单的示例，仅仅绘制了LCD屏幕的边缘点。如果你需要进行更复杂的图形绘制，可以在内层循环中添加相应的绘制逻辑。

请注意，在实际使用中，你还需要根据自己的需求和硬件资源进行相应的优化和调整。

相关问题

用STM32F4编写程序用LCD屏ILI9341输出“张翼鹏”

以下是使用STM32F4和ILI9341 LCD屏幕输出“张翼鹏”的示例代码：

#include "stm32f4xx.h"
#include "stm32f4xx_gpio.h"
#include "stm32f4xx_spi.h"

// 定义SPI接口
#define LCD_SPI_PORT     SPI5
#define LCD_SPI_RCC      RCC_APB2Periph_SPI5
#define LCD_SPI_CLK      45000000

// 定义SPI引脚
#define LCD_SPI_SCK_PIN  GPIO_Pin_7
#define LCD_SPI_SCK_PORT GPIOA
#define LCD_SPI_MISO_PIN GPIO_Pin_11
#define LCD_SPI_MISO_PORT GPIOC
#define LCD_SPI_MOSI_PIN GPIO_Pin_12
#define LCD_SPI_MOSI_PORT GPIOC

// 定义LCD控制引脚
#define LCD_CS_PIN       GPIO_Pin_2
#define LCD_CS_PORT      GPIOB
#define LCD_DC_PIN       GPIO_Pin_1
#define LCD_DC_PORT      GPIOB
#define LCD_RST_PIN      GPIO_Pin_0
#define LCD_RST_PORT     GPIOB

// 定义LCD屏幕分辨率
#define LCD_WIDTH        240
#define LCD_HEIGHT       320

// 初始化SPI接口
void LCD_SPI_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    SPI_InitTypeDef SPI_InitStructure;

    // 使能SPI时钟
    RCC_APB2PeriphClockCmd(LCD_SPI_RCC, ENABLE);

    // 配置SPI引脚
    GPIO_InitStructure.GPIO_Pin = LCD_SPI_SCK_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(LCD_SPI_SCK_PORT, &GPIO_InitStructure);
    GPIO_PinAFConfig(LCD_SPI_SCK_PORT, GPIO_PinSource7, GPIO_AF_SPI5);

    GPIO_InitStructure.GPIO_Pin = LCD_SPI_MISO_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(LCD_SPI_MISO_PORT, &GPIO_InitStructure);
    GPIO_PinAFConfig(LCD_SPI_MISO_PORT, GPIO_PinSource11, GPIO_AF_SPI5);

    GPIO_InitStructure.GPIO_Pin = LCD_SPI_MOSI_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(LCD_SPI_MOSI_PORT, &GPIO_InitStructure);
    GPIO_PinAFConfig(LCD_SPI_MOSI_PORT, GPIO_PinSource12, GPIO_AF_SPI5);

    // 配置SPI
    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(LCD_SPI_PORT, &SPI_InitStructure);

    // 使能SPI
    SPI_Cmd(LCD_SPI_PORT, ENABLE);
}

// 初始化LCD控制引脚
void LCD_GPIO_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);

    GPIO_InitStructure.GPIO_Pin = LCD_CS_PIN | LCD_DC_PIN | LCD_RST_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
}

// 初始化LCD屏幕
void LCD_Init(void)
{
    LCD_GPIO_Init();
    LCD_SPI_Init();

    // 复位LCD屏幕
    GPIO_ResetBits(LCD_RST_PORT, LCD_RST_PIN);
    DelayMs(10);
    GPIO_SetBits(LCD_RST_PORT, LCD_RST_PIN);
    DelayMs(10);

    // 发送初始化命令
    LCD_WriteCommand(0x01); // 软件复位
    DelayMs(10);
    LCD_WriteCommand(0xCF);
    LCD_WriteData(0x00);
    LCD_WriteData(0xC1);
    LCD_WriteData(0x30);
    DelayMs(10);
    LCD_WriteCommand(0xED);
    LCD_WriteData(0x64);
    LCD_WriteData(0x03);
    LCD_WriteData(0x12);
    LCD_WriteData(0x81);
    DelayMs(10);
    LCD_WriteCommand(0xE8);
    LCD_WriteData(0x85);
    LCD_WriteData(0x10);
    LCD_WriteData(0x7A);
    DelayMs(10);
    LCD_WriteCommand(0xCB);
    LCD_WriteData(0x39);
    LCD_WriteData(0x2C);
    LCD_WriteData(0x00);
    LCD_WriteData(0x34);
    LCD_WriteData(0x02);
    DelayMs(10);
    LCD_WriteCommand(0xF7);
    LCD_WriteData(0x20);
    DelayMs(10);
    LCD_WriteCommand(0xEA);
    LCD_WriteData(0x00);
    LCD_WriteData(0x00);
    DelayMs(10);
    LCD_WriteCommand(0xC0); // 电源控制1
    LCD_WriteData(0x23);
    DelayMs(10);
    LCD_WriteCommand(0xC1); // 电源控制2
    LCD_WriteData(0x10);
    DelayMs(10);
    LCD_WriteCommand(0xC5); // VCOM控制1
    LCD_WriteData(0x3E);
    LCD_WriteData(0x28);
    DelayMs(10);
    LCD_WriteCommand(0xC7); // VCOM控制2
    LCD_WriteData(0x86);
    DelayMs(10);
    LCD_WriteCommand(0x36); // MADCTL
    LCD_WriteData(0x68);
    DelayMs(10);
    LCD_WriteCommand(0x3A); // COLMOD
    LCD_WriteData(0x55);
    DelayMs(10);
    LCD_WriteCommand(0xB1); // Frame rate control，最大 70 Hz，同时保证低功耗
    LCD_WriteData(0x00);
    LCD_WriteData(0x18);
    DelayMs(10);
    LCD_WriteCommand(0xB6); // Display function control，RGB/MCU interface select
    LCD_WriteData(0x08);
    LCD_WriteData(0x82);
    LCD_WriteData(0x27);
    DelayMs(10);
    LCD_WriteCommand(0xF2); // 3Gamma control，disable
    LCD_WriteData(0x00);
    DelayMs(10);
    LCD_WriteCommand(0x26); // Gamma curve selected
    LCD_WriteData(0x01);
    DelayMs(10);
    LCD_WriteCommand(0xE0); // Set Gamma，positive gamma correction
    LCD_WriteData(0x0F);
    LCD_WriteData(0x31);
    LCD_WriteData(0x2B);
    LCD_WriteData(0x0C);
    LCD_WriteData(0x0E);
    LCD_WriteData(0x08);
    LCD_WriteData(0x4E);
    LCD_WriteData(0xF1);
    LCD_WriteData(0x37);
    LCD_WriteData(0x07);
    LCD_WriteData(0x10);
    LCD_WriteData(0x03);
    LCD_WriteData(0x0E);
    LCD_WriteData(0x09);
    LCD_WriteData(0x00);
    DelayMs(10);
    LCD_WriteCommand(0XE1); // Set Gamma，negative gamma correction
    LCD_WriteData(0x00);
    LCD_WriteData(0x0E);
    LCD_WriteData(0x14);
    LCD_WriteData(0x03);
    LCD_WriteData(0x11);
    LCD_WriteData(0x07);
    LCD_WriteData(0x31);
    LCD_WriteData(0xC1);
    LCD_WriteData(0x48);
    LCD_WriteData(0x08);
    LCD_WriteData(0x0F);
    LCD_WriteData(0x0C);
    LCD_WriteData(0x31);
    LCD_WriteData(0x36);
    LCD_WriteData(0x0F);
    DelayMs(10);
    LCD_WriteCommand(0x11); // Sleep out
    DelayMs(120);
    LCD_WriteCommand(0x29); // Display on

    // 清屏
    LCD_Clear(0xFFFF);
}

// 写入数据到LCD屏幕
void LCD_WriteData(uint8_t data)
{
    GPIO_SetBits(LCD_DC_PORT, LCD_DC_PIN); // DC设置为高电平表示写入数据
    GPIO_ResetBits(LCD_CS_PORT, LCD_CS_PIN); // 使能片选
    while (SPI_I2S_GetFlagStatus(LCD_SPI_PORT, SPI_I2S_FLAG_TXE) == RESET); // 等待发送缓冲区为空
    SPI_I2S_SendData(LCD_SPI_PORT, data); // 发送数据
    while (SPI_I2S_GetFlagStatus(LCD_SPI_PORT, SPI_I2S_FLAG_RXNE) == RESET); // 等待接收缓冲区非空
    SPI_I2S_ReceiveData(LCD_SPI_PORT); // 读取接收到的数据，清除RXNE标志位
    GPIO_SetBits(LCD_CS_PORT, LCD_CS_PIN); // 禁止片选
}

// 写入命令到LCD屏幕
void LCD_WriteCommand(uint8_t cmd)
{
    GPIO_ResetBits(LCD_DC_PORT, LCD_DC_PIN); // DC设置为低电平表示写入命令
    GPIO_ResetBits(LCD_CS_PORT, LCD_CS_PIN); // 使能片选
    while (SPI_I2S_GetFlagStatus(LCD_SPI_PORT, SPI_I2S_FLAG_TXE) == RESET); // 等待发送缓冲区为空
    SPI_I2S_SendData(LCD_SPI_PORT, cmd); // 发送命令
    while (SPI_I2S_GetFlagStatus(LCD_SPI_PORT, SPI_I2S_FLAG_RXNE) == RESET); // 等待接收缓冲区非空
    SPI_I2S_ReceiveData(LCD_SPI_PORT); // 读取接收到的数据，清除RXNE标志位
    GPIO_SetBits(LCD_CS_PORT, LCD_CS_PIN); // 禁止片选
}

// 清屏
void LCD_Clear(uint16_t color)
{
    int i, j;
    LCD_SetArea(0, 0, LCD_WIDTH-1, LCD_HEIGHT-1);
    for (i = 0; i < LCD_HEIGHT; i++) {
        for (j = 0; j < LCD_WIDTH; j++) {
            LCD_WriteData(color >> 8);
            LCD_WriteData(color & 0xFF);
        }
    }
}

// 设置绘制区域
void LCD_SetArea(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2)
{
    LCD_WriteCommand(0x2A);
    LCD_WriteData(x1 >> 8);
    LCD_WriteData(x1 & 0xFF);
    LCD_WriteData(x2 >> 8);
    LCD_WriteData(x2 & 0xFF);
    LCD_WriteCommand(0x2B);
    LCD_WriteData(y1 >> 8);
    LCD_WriteData(y1 & 0xFF);
    LCD_WriteData(y2 >> 8);
    LCD_WriteData(y2 & 0xFF);
    LCD_WriteCommand(0x2C);
}

// 在指定位置绘制一个像素点
void LCD_DrawPixel(uint16_t x, uint16_t y, uint16_t color)
{
    LCD_SetArea(x, y, x, y);
    LCD_WriteData(color >> 8);
    LCD_WriteData(color & 0xFF);
}

// 在指定位置绘制一个字符
void LCD_DrawChar(uint16_t x, uint16_t y, char c, uint16_t color, uint16_t bgcolor)
{
    int i, j;
    uint8_t font[16];
    for (i = 0; i < 16; i++) {
        font[i] = Font16x16[c*16+i];
    }
    for (i = 0; i < 16; i++) {
        for (j = 0; j < 8; j++) {
            if (font[i] & (1 << (7-j))) {
                LCD_DrawPixel(x+j, y+i, color);
            } else {
                LCD_DrawPixel(x+j, y+i, bgcolor);
            }
        }
    }
}

// 在指定位置绘制一个字符串
void LCD_DrawString(uint16_t x, uint16_t y, char *str, uint16_t color, uint16_t bgcolor)
{
    while (*str) {
        LCD_DrawChar(x, y, *str++, color, bgcolor);
        x += 8;
    }
}

int main(void)
{
    LCD_Init();
    LCD_DrawString(50, 100, "张翼鹏", 0x0000, 0xFFFF);
    while (1) {}
}

在代码中，需要注意以下几点：

1. 需要定义LCD屏幕的SPI接口、引脚和分辨率；
2. 需要初始化SPI接口和LCD控制引脚；
3. 需要发送初始化命令，具体的命令可以参考LCD屏幕的数据手册；
4. 绘制字符和字符串时需要使用字库，本例中使用了一个16x16的字库，可以根据需要自行替换；
5. 绘制字符和字符串时需要注意字体的大小和颜色。
6. 在main函数中，我们先调用LCD_Init()函数初始化LCD屏幕，然后调用LCD_DrawString()函数在屏幕上绘制字符串“张翼鹏”。

需要注意的是，上述代码中的一些函数调用和数据类型可能与你的程序略有不同，需要根据具体情况进行修改。

stm32f4实现串口屏通信

实现stm32f4与串口屏的通信需要以下几个步骤：

1. 配置串口：首先需要配置stm32f4的串口通信，包括串口波特率、数据位、停止位和校验位等参数。

2. 初始化串口：使用HAL库或者底层驱动代码初始化串口，使串口能够正常工作。

3. 发送数据：使用串口发送数据给串口屏，可以使用printf函数或者HAL库提供的串口发送函数等。

4. 接收数据：接收串口屏返回的数据，可以使用HAL库提供的串口接收函数等。

5. 处理数据：根据串口屏返回的数据进行相应的处理，例如更新显示内容等。

以下是一个简单的示例代码，实现了stm32f4与串口屏的通信：

#include <stdio.h>
#include "stm32f4xx.h"

#define LCD_WIDTH  320
#define LCD_HEIGHT 240

void init_uart(void);
void send_cmd(uint8_t cmd);
void send_data(uint8_t data);
void lcd_clear(void);
void lcd_draw_pixel(uint16_t x, uint16_t y, uint16_t color);
void lcd_draw_line(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t color);

int main(void)
{
    uint16_t i;

    // 初始化串口
    init_uart();

    // 清屏
    lcd_clear();

    // 画线
    lcd_draw_line(0, 0, LCD_WIDTH - 1, LCD_HEIGHT - 1, 0xFFFF);
    lcd_draw_line(0, LCD_HEIGHT - 1, LCD_WIDTH - 1, 0, 0xFFFF);

    while (1) {
        // 等待串口屏返回数据
        while (!USART_GetFlagStatus(USART2, USART_FLAG_RXNE));
        uint8_t data = USART_ReceiveData(USART2);

        // 处理数据
        switch (data) {
            case 0x01: // 清屏
                lcd_clear();
                break;
            case 0x02: // 画线
                uint16_t x1, y1, x2, y2, color;
                // 接收参数
                while (!USART_GetFlagStatus(USART2, USART_FLAG_RXNE));
                x1 = USART_ReceiveData(USART2);
                while (!USART_GetFlagStatus(USART2, USART_FLAG_RXNE));
                x1 |= USART_ReceiveData(USART2) << 8;
                while (!USART_GetFlagStatus(USART2, USART_FLAG_RXNE));
                y1 = USART_ReceiveData(USART2);
                while (!USART_GetFlagStatus(USART2, USART_FLAG_RXNE));
                y1 |= USART_ReceiveData(USART2) << 8;
                while (!USART_GetFlagStatus(USART2, USART_FLAG_RXNE));
                x2 = USART_ReceiveData(USART2);
                while (!USART_GetFlagStatus(USART2, USART_FLAG_RXNE));
                x2 |= USART_ReceiveData(USART2) << 8;
                while (!USART_GetFlagStatus(USART2, USART_FLAG_RXNE));
                y2 = USART_ReceiveData(USART2);
                while (!USART_GetFlagStatus(USART2, USART_FLAG_RXNE));
                y2 |= USART_ReceiveData(USART2) << 8;
                while (!USART_GetFlagStatus(USART2, USART_FLAG_RXNE));
                color = USART_ReceiveData(USART2);
                while (!USART_GetFlagStatus(USART2, USART_FLAG_RXNE));
                color |= USART_ReceiveData(USART2) << 8;
                // 画线
                lcd_draw_line(x1, y1, x2, y2, color);
                break;
            default:
                break;
        }
    }
}

void init_uart(void)
{
    GPIO_InitTypeDef GPIO_InitStruct;
    USART_InitTypeDef USART_InitStruct;

    // 使能USART2和GPIOA的时钟
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);

    // 配置PA2为TX和PA3为RX
    GPIO_InitStruct.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOA, &GPIO_InitStruct);

    // 配置USART2
    USART_InitStruct.USART_BaudRate = 115200;
    USART_InitStruct.USART_WordLength = USART_WordLength_8b;
    USART_InitStruct.USART_StopBits = USART_StopBits_1;
    USART_InitStruct.USART_Parity = USART_Parity_No;
    USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStruct.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
    USART_Init(USART2, &USART_InitStruct);

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

void send_cmd(uint8_t cmd)
{
    while (!USART_GetFlagStatus(USART2, USART_FLAG_TXE));
    USART_SendData(USART2, 0x00);
    while (!USART_GetFlagStatus(USART2, USART_FLAG_TXE));
    USART_SendData(USART2, cmd);
}

void send_data(uint8_t data)
{
    while (!USART_GetFlagStatus(USART2, USART_FLAG_TXE));
    USART_SendData(USART2, 0x01);
    while (!USART_GetFlagStatus(USART2, USART_FLAG_TXE));
    USART_SendData(USART2, data);
}

void lcd_clear(void)
{
    send_cmd(0x01);
}

void lcd_draw_pixel(uint16_t x, uint16_t y, uint16_t color)
{
    send_cmd(0x02);
    send_data(x & 0xFF);
    send_data((x >> 8) & 0xFF);
    send_data(y & 0xFF);
    send_data((y >> 8) & 0xFF);
    send_data(color & 0xFF);
    send_data((color >> 8) & 0xFF);
}

void lcd_draw_line(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t color)
{
    send_cmd(0x03);
    send_data(x1 & 0xFF);
    send_data((x1 >> 8) & 0xFF);
    send_data(y1 & 0xFF);
    send_data((y1 >> 8) & 0xFF);
    send_data(x2 & 0xFF);
    send_data((x2 >> 8) & 0xFF);
    send_data(y2 & 0xFF);
    send_data((y2 >> 8) & 0xFF);
    send_data(color & 0xFF);
    send_data((color >> 8) & 0xFF);
}

在上面的代码中，我们使用了USART2串口与串口屏通信，通过调用send_cmd和send_data两个函数来发送数据。lcd_clear、lcd_draw_pixel和lcd_draw_line三个函数分别对应串口屏的清屏、画点和画线指令。在主函数中，我们使用了一个while循环来等待串口屏返回数据，并根据数据进行相应的处理。