STM32F103ZE通过字符串对R61509VN显示屏画线的程序

以下是基于STM32F103ZE通过字符串对R61509VN显示屏画线的程序的示例代码：

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

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

void LCD_Init(void)
{
    LCD_CMD = 0x0000; //软复位
    delay(1000);
    LCD_CMD = 0x00E3; //Power Control 2
    LCD_DATA = 0x3008;
    LCD_DATA = 0x0013;
    LCD_CMD = 0x00E7; //Driver Output Control
    LCD_DATA = 0x0012;
    LCD_CMD = 0x00EF; //Power Control 3
    LCD_DATA = 0x1231;
    LCD_CMD = 0x0025; //VCOM Control
    LCD_DATA = 0x0023;
    LCD_CMD = 0x00B1; //Frame Rate Control
    LCD_DATA = 0x000B;
    LCD_DATA = 0x0003;
    LCD_CMD = 0x00B4; //Display Inversion Control
    LCD_DATA = 0x0000;
    LCD_CMD = 0x00C0; //Power Control 1
    LCD_DATA = 0x0026;
    LCD_DATA = 0x0004;
    LCD_CMD = 0x00C1; //Power Control 2
    LCD_DATA = 0x0011;
    LCD_CMD = 0x00C5; //VCOM Control 2
    LCD_DATA = 0x0035;
    LCD_DATA = 0x003E;
    LCD_CMD = 0x00C7; //VCOM Control 3
    LCD_DATA = 0x00BE;
    LCD_CMD = 0x003A; //Pixel Format Set
    LCD_DATA = 0x0005;
    LCD_CMD = 0x0036; //Memory Access Control
    LCD_DATA = 0x0028;
    LCD_CMD = 0x002A; //Column Address Set
    LCD_DATA = 0x0000;
    LCD_DATA = 0x0000;
    LCD_DATA = 0x0001;
    LCD_DATA = 0x003F;
    LCD_CMD = 0x002B; //Page Address Set
    LCD_DATA = 0x0000;
    LCD_DATA = 0x0000;
    LCD_DATA = 0x0001;
    LCD_DATA = 0x00DF;
    LCD_CMD = 0x0029; //Display On
}

void LCD_WriteReg(unsigned short index, unsigned short value)
{
    LCD_CMD = index;
    LCD_DATA = value;
}

void LCD_SetWindow(unsigned short x0, unsigned short y0, unsigned short x1, unsigned short y1)
{
    LCD_CMD = 0x002A; //Column Address Set
    LCD_DATA = x0 >> 8;
    LCD_DATA = x0 & 0xFF;
    LCD_DATA = x1 >> 8;
    LCD_DATA = x1 & 0xFF;
    LCD_CMD = 0x002B; //Page Address Set
    LCD_DATA = y0 >> 8;
    LCD_DATA = y0 & 0xFF;
    LCD_DATA = y1 >> 8;
    LCD_DATA = y1 & 0xFF;
    LCD_CMD = 0x002C; //Memory Write
}

void LCD_DrawLine(unsigned short x0, unsigned short y0, unsigned short x1, unsigned short y1, unsigned short color)
{
    int dx = x1 - x0;
    int dy = y1 - y0;
    int stepx, stepy;
    if (dy < 0) {
        dy = -dy;
        stepy = -1;
    } else {
        stepy = 1;
    }
    if (dx < 0) {
        dx = -dx;
        stepx = -1;
    } else {
        stepx = 1;
    }
    dy <<= 1;
    dx <<= 1;
    LCD_SetWindow(x0, y0, x0, y0);
    LCD_DATA = color;
    if (dx > dy) {
        int fraction = dy - (dx >> 1);
        while (x0 != x1) {
            if (fraction >= 0) {
                y0 += stepy;
                fraction -= dx;
            }
            x0 += stepx;
            fraction += dy;
            LCD_SetWindow(x0, y0, x0, y0);
            LCD_DATA = color;
        }
    } else {
        int fraction = dx - (dy >> 1);
        while (y0 != y1) {
            if (fraction >= 0) {
                x0 += stepx;
                fraction -= dy;
            }
            y0 += stepy;
            fraction += dx;
            LCD_SetWindow(x0, y0, x0, y0);
            LCD_DATA = color;
        }
    }
}

void delay(unsigned int n)
{
    volatile unsigned int i;
    for (i = 0; i < n; i++);
}

int main(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
    LCD_Init();
    LCD_WriteReg(0x002c, 0x0000); //Clear Screen
    LCD_DrawLine(0, 0, 319, 239, 0xF800); //Draw Red Line
    while(1) {
    }
}

在上述代码中，我们首先定义了一些常量和函数，如LCD_CMD和LCD_DATA分别表示LCD的命令和数据，LCD_Init用于初始化LCD，LCD_WriteReg用于向LCD写入寄存器，LCD_SetWindow用于设置LCD的窗口范围，LCD_DrawLine用于在LCD上绘制线段，delay用于延时。

在main函数中，我们首先初始化GPIO和LCD，然后调用LCD_WriteReg清屏，最后调用LCD_DrawLine绘制一条红色的直线。

需要注意的是，此代码仅为示例代码，具体实现可能需要根据具体的硬件和接口进行修改。