32单片机lcd绘制梯形

要在32单片机上绘制梯形，需要使用液晶显示器（LCD）和相应的图形绘制函数。以下是一些简单的步骤：

1.初始化LCD屏幕

2.选择LCD显示的区域

3.使用直线绘制函数绘制四条边，构成梯形

4.使用填充函数填充梯形内部

下面是一个简单的代码示例：

#include <reg52.h>
#include <intrins.h>

//定义LCD数据端口
sbit LCD_D4 = P1^4;
sbit LCD_D5 = P1^5;
sbit LCD_D6 = P1^6;
sbit LCD_D7 = P1^7;

//定义LCD控制端口
sbit LCD_RS = P2^0;
sbit LCD_RW = P2^1;
sbit LCD_EN = P2^2;

//LCD显示延时函数
void LCD_Delay(unsigned int i)
{
    while(i--);
}

//LCD写指令函数
void LCD_WriteCommand(unsigned char cmd)
{
    LCD_RW = 0;     //写入模式
    LCD_RS = 0;     //写入指令
    LCD_EN = 1;     //使能
    LCD_D4 = cmd & 0x01;     //写入数据
    LCD_D5 = cmd & 0x02;
    LCD_D6 = cmd & 0x04;
    LCD_D7 = cmd & 0x08;
    LCD_Delay(10);  //延时
    LCD_EN = 0;     //关闭使能
    LCD_Delay(10);  //延时
}

//LCD写数据函数
void LCD_WriteData(unsigned char dat)
{
    LCD_RW = 0;     //写入模式
    LCD_RS = 1;     //写入数据
    LCD_EN = 1;     //使能
    LCD_D4 = dat & 0x01;     //写入数据
    LCD_D5 = dat & 0x02;
    LCD_D6 = dat & 0x04;
    LCD_D7 = dat & 0x08;
    LCD_Delay(10);  //延时
    LCD_EN = 0;     //关闭使能
    LCD_Delay(10);  //延时
}

//LCD初始化函数
void LCD_Init()
{
    LCD_WriteCommand(0x02);  //初始化LCD屏幕
    LCD_WriteCommand(0x28);  //设置LCD为4位数据线、2行显示、5x8点阵字符
    LCD_WriteCommand(0x0C);  //显示开、无光标、不闪烁
    LCD_WriteCommand(0x06);  //文字不动，地址自动加1
    LCD_WriteCommand(0x01);  //清屏
}

//LCD显示字符函数
void LCD_ShowChar(unsigned char x, unsigned char y, unsigned char chr)
{
    unsigned char addr;
    if(y == 0) addr = 0x80 + x;
    else addr = 0xC0 + x;
    LCD_WriteCommand(addr);
    LCD_WriteData(chr);
}

//LCD显示字符串函数
void LCD_ShowString(unsigned char x, unsigned char y, unsigned char *str)
{
    while(*str != '\0')
    {
        LCD_ShowChar(x, y, *str);
        x++;
        str++;
    }
}

//LCD清屏函数
void LCD_Clear()
{
    LCD_WriteCommand(0x01);
}

//绘制直线函数
void Draw_Line(unsigned char x1, unsigned char y1, unsigned char x2, unsigned char y2)
{
    unsigned char i, dx, dy;
    float k, b;
    if(x1 == x2)    //竖线
    {
        for(i = y1; i <= y2; i++)
        {
            LCD_ShowChar(x1, i, '*');
        }
    }
    else if(y1 == y2)   //横线
    {
        for(i = x1; i <= x2; i++)
        {
            LCD_ShowChar(i, y1, '*');
        }
    }
    else    //斜线
    {
        dx = x2 - x1;
        dy = y2 - y1;
        k = (float)dy / dx;
        b = y1 - k * x1;
        for(i = x1; i <= x2; i++)
        {
            LCD_ShowChar(i, (unsigned char)(k * i + b), '*');
        }
    }
}

//绘制梯形函数
void Draw_Trapezium(unsigned char x1, unsigned char y1, unsigned char x2, unsigned char y2, unsigned char h)
{
    Draw_Line(x1, y1, x2, y1);
    Draw_Line(x1, y1, x1 + h, y1 + h);
    Draw_Line(x2, y1, x2 - h, y1 + h);
    Draw_Line(x1 + h, y1 + h, x2 - h, y1 + h);
}

//填充梯形内部函数
void Fill_Trapezium(unsigned char x1, unsigned char y1, unsigned char x2, unsigned char y2, unsigned char h)
{
    unsigned char i, j;
    for(i = x1 + 1; i < x1 + h; i++)
    {
        for(j = y1 + 1; j < y1 + h; j++)
        {
            LCD_ShowChar(i, j, '*');
        }
    }
    for(i = x2 - h + 1; i < x2; i++)
    {
        for(j = y1 + 1; j < y1 + h; j++)
        {
            LCD_ShowChar(i, j, '*');
        }
    }
}

void main()
{
    LCD_Init();     //初始化LCD屏幕
    Draw_Trapezium(10, 10, 50, 30, 10);   //绘制梯形
    Fill_Trapezium(10, 10, 50, 30, 10);   //填充梯形内部
    while(1);
}

该代码使用了32单片机上的LCD显示器，并通过绘制直线和填充函数来绘制和填充梯形。你可以根据自己的需要进行修改。