基于stm32f429的RGB LCD库函数版C语言驱动程序

以下是一个基于STM32F429 Discovery开发板的RGB LCD驱动程序，使用了库函数和C语言编写。

首先，需要在Keil或者其他编译器中创建一个新工程，并添加STM32F429 Discovery开发板的库文件。

接着，在程序中引入库文件，并定义LCD控制器芯片的参数：

#include "stm32f4xx.h"
#include "stm32f429i_discovery.h"

#define LCD_CMD *((volatile unsigned short*)0x60000000)
#define LCD_DATA *((volatile unsigned short*)0x60020000)

#define LCD_RST_PIN GPIO_Pin_13
#define LCD_RST_PORT GPIOD
#define LCD_RS_PIN GPIO_Pin_14
#define LCD_RS_PORT GPIOD
#define LCD_CS_PIN GPIO_Pin_15
#define LCD_CS_PORT GPIOD

然后，需要定义一些基本的函数，如初始化LCD、设置显示区域等：

void LCD_init(void)
{
    /* 复位LCD */
    GPIO_ResetBits(LCD_RST_PORT, LCD_RST_PIN);
    delay_ms(10);
    GPIO_SetBits(LCD_RST_PORT, LCD_RST_PIN);
    delay_ms(10);
    
    /* 初始化LCD */
    LCD_CMD = 0xCF;
    LCD_DATA = 0x00;
    LCD_DATA = 0xC9;
    LCD_DATA = 0X30;
    
    LCD_CMD = 0xED;
    LCD_DATA = 0x64;
    LCD_DATA = 0x03;
    LCD_DATA = 0X12;
    LCD_DATA = 0X81;
    
    LCD_CMD = 0xE8;
    LCD_DATA = 0x85;
    LCD_DATA = 0x00;
    LCD_DATA = 0x78;
    
    LCD_CMD = 0xCB;
    LCD_DATA = 0x39;
    LCD_DATA = 0x2C;
    LCD_DATA = 0x00;
    LCD_DATA = 0x34;
    LCD_DATA = 0x02;
    
    LCD_CMD = 0xF7;
    LCD_DATA = 0x20;
    
    LCD_CMD = 0xEA;
    LCD_DATA = 0x00;
    LCD_DATA = 0x00;
    
    /* 设置显示区域 */
    LCD_CMD = 0x36;
    LCD_DATA = 0x48;
    
    /* 开启显示 */
    LCD_CMD = 0x29;
}

最后，需要定义一些绘图函数，如绘制像素点、线段、矩形、圆等：

void LCD_drawPixel(int x, int y, unsigned short color)
{
    LCD_setWindow(x, y, x, y);
    LCD_CMD = 0x2C;
    LCD_DATA = color;
}

void LCD_drawLine(int x0, int y0, int x1, int y1, unsigned short color)
{
    int dx = abs(x1 - x0), sx = x0 < x1 ? 1 : -1;
    int dy = abs(y1 - y0), sy = y0 < y1 ? 1 : -1;
    int err = (dx > dy ? dx : -dy) / 2, e2;

    while (1)
    {
        LCD_drawPixel(x0, y0, color);
        if (x0 == x1 && y0 == y1) break;
        e2 = err;
        if (e2 > -dx) { err -= dy; x0 += sx; }
        if (e2 < dy) { err += dx; y0 += sy; }
    }
}

void LCD_drawRect(int x0, int y0, int x1, int y1, unsigned short color)
{
    LCD_drawLine(x0, y0, x1, y0, color);
    LCD_drawLine(x0, y1, x1, y1, color);
    LCD_drawLine(x0, y0, x0, y1, color);
    LCD_drawLine(x1, y0, x1, y1, color);
}

void LCD_drawCircle(int x0, int y0, int r, unsigned short color)
{
    int x = -r, y = 0, err = 2 - 2 * r;
    do {
        LCD_drawPixel(x0 - x, y0 + y, color);
        LCD_drawPixel(x0 - y, y0 - x, color);
        LCD_drawPixel(x0 + x, y0 - y, color);
        LCD_drawPixel(x0 + y, y0 + x, color);
        r = err;
        if (r <= y) err += ++y * 2 + 1;
        if (r > x || err > y) err += ++x * 2 + 1;
    } while (x < 0);
}

这样，一个基于STM32F429 Discovery开发板的RGB LCD驱动程序就完成了。开发者可以在此基础上进行修改和优化，以满足自己的需求。