利用51单片机使12864液晶显示屏显示出正弦波的完整正确代码

很抱歉，我不是一个可以运行代码的程序，也无法提供完整的代码。但我可以给你提供一个参考代码，你可以根据你的实际需求进行修改。

#include <reg52.h>

#define LCD_data P0
sbit RS=P2^0;
sbit RW=P2^1;
sbit EN=P2^2;

void LCD_Init();
void LCD_WriteCmd(unsigned char cmd);
void LCD_WriteData(unsigned char dat);
void LCD_ShowString(unsigned char x,unsigned char y,unsigned char *p);
void LCD_ShowNum(unsigned char x,unsigned char y,unsigned int num,unsigned char len);
void delay_ms(unsigned int ms);
void display_waveform();

void main()
{
    LCD_Init();
    display_waveform();
}

void display_waveform()
{
    unsigned int i;
    unsigned char sin_table[] = {
        128, 131, 134, 137, 140, 143, 146, 149, 152, 155, 158, 162,
        165, 168, 171, 174, 177, 180, 183, 186, 189, 192, 195, 198,
        201, 204, 207, 210, 213, 216, 219, 222, 225, 228, 231, 234,
        237, 240, 243, 246, 248, 251, 254, 255, 254, 251, 248, 243,
        240, 237, 234, 231, 228, 225, 222, 219, 216, 213, 210, 207,
        204, 201, 198, 195, 192, 189, 186, 183, 180, 177, 174, 171,
        168, 165, 162, 158, 155, 152, 149, 146, 143, 140, 137, 134,
        131, 128, 125, 122, 119, 116, 113, 110, 107, 104, 101, 98,
        94, 91, 88, 85, 82, 79, 76, 73, 70, 67, 64, 61,
        58, 55, 52, 49, 46, 43, 40, 37, 34, 31, 28, 25,
        22, 19, 16, 13, 11, 8, 5, 4, 5, 8, 11, 16,
        19, 22, 25, 28, 31, 34, 37, 40, 43, 46, 49, 52,
        55, 58, 61, 64, 67, 70, 73, 76, 79, 82, 85, 88,
        91, 94, 98, 101, 104, 107, 110, 113, 116, 119, 122, 125
    };

    LCD_WriteCmd(0x34);
    LCD_WriteCmd(0x30);
    LCD_WriteCmd(0x0C);
    LCD_WriteCmd(0x01);

    while (1) {
        for (i = 0; i < 128; i++) {
            LCD_WriteCmd(0x80 + i);
            LCD_WriteData(sin_table[i]);
        }
    }
}

void LCD_Init()
{
    delay_ms(15);
    LCD_WriteCmd(0x30);
    delay_ms(5);
    LCD_WriteCmd(0x30);
    delay_ms(1);
    LCD_WriteCmd(0x30);
    delay_ms(1);
    LCD_WriteCmd(0x38);
    LCD_WriteCmd(0x08);
    LCD_WriteCmd(0x01);
    LCD_WriteCmd(0x06);
    LCD_WriteCmd(0x0C);
}

void LCD_WriteCmd(unsigned char cmd)
{
    RS = 0;
    RW = 0;
    LCD_data = cmd;
    EN = 1;
    delay_ms(5);
    EN = 0;
}

void LCD_WriteData(unsigned char dat)
{
    RS = 1;
    RW = 0;
    LCD_data = dat;
    EN = 1;
    delay_ms(5);
    EN = 0;
}

void LCD_ShowString(unsigned char x,unsigned char y,unsigned char *p)
{
    unsigned char i=0;
    if (y==0) {
        LCD_WriteCmd(0x80+x); 
    } else {
        LCD_WriteCmd(0x80+0x40+x); 
    }
    while (*(p+i)!=0) {
        LCD_WriteData(*(p+i));
        i++;
    } 
}

void LCD_ShowNum(unsigned char x,unsigned char y,unsigned int num,unsigned char len)
{
    unsigned char i;
    unsigned char buf[16];
    for (i=0; i<len; i++) {
        buf[len-1-i] = num%10+'0';
        num /= 10;
    }
    buf[len] = 0;
    LCD_ShowString(x, y, buf);
}

void delay_ms(unsigned int ms)
{
    unsigned int i,j;
    for (i=0; i<ms; i++) {
        for (j=0; j<1141; j++);
    }
}

这是一个基于 51 单片机的代码，实现了在 12864 液晶显示屏上显示正弦波。你可以根据这个代码的框架和你的实际需求进行修改和优化。同时需要注意的是，该代码可能并不完全正确，因此在实际使用中还需要进行一定的调试和修改。