基于C51单片机控制的OLED12864屏幕的显示代码

以下是一个基于C51单片机控制OLED 12864屏幕的显示代码的示例：

#include <reg51.h>
#include <intrins.h>

#define LCD_SCL P1_0 // OLED串行时钟线
#define LCD_SDA P1_1 // OLED串行数据线

void delay_us(unsigned int t) {
    while(t--);
}

void OLED_write_cmd(unsigned char cmd) {
    LCD_SCL = 0;
    LCD_SDA = 0;
    LCD_SCL = 1;
    LCD_SDA = 0;
    LCD_SCL = 0;
    _nop_();
    
    for(int i = 0; i < 8; i++) {
        LCD_SDA = (cmd >> i) & 0x01;
        LCD_SCL = 1;
        _nop_();
        LCD_SCL = 0;
        _nop_();
    }
}

void OLED_write_data(unsigned char dat) {
    LCD_SCL = 0;
    LCD_SDA = 1;
    LCD_SCL = 1;
    LCD_SDA = 0;
    LCD_SCL = 0;
    _nop_();
    
    for(int i = 0; i < 8; i++) {
        LCD_SDA = (dat >> i) & 0x01;
        LCD_SCL = 1;
        _nop_();
        LCD_SCL = 0;
        _nop_();
    }
}

void OLED_init() {
    OLED_write_cmd(0xAE); // 关闭OLED显示
    OLED_write_cmd(0x00); // 设置低列地址
    OLED_write_cmd(0x10); // 设置高列地址
    OLED_write_cmd(0x40); // 设置显示开始行
    OLED_write_cmd(0xB0); // 设置页地址
    OLED_write_cmd(0x81); // 设置对比度控制
    OLED_write_cmd(0xCF); // 设置电荷泵倍率
    OLED_write_cmd(0xA1); // 设置段重新映射
    OLED_write_cmd(0xA6); // 设置正常/反向显示
    OLED_write_cmd(0xA8); // 设置多重比例
    OLED_write_cmd(0x3F); // 设置MUX比率
    OLED_write_cmd(0xC8); // 设置COM扫描方向
    OLED_write_cmd(0xD3); // 设置显示偏移
    OLED_write_cmd(0x00); // 不偏移
    OLED_write_cmd(0xD5); // 设置显示时钟分频
    OLED_write_cmd(0x80); // 100分频
    OLED_write_cmd(0xD9); // 设置预充电周期
    OLED_write_cmd(0xF1); // PHASE 1: 2D, PHASE 2: 5D
    OLED_write_cmd(0xDA); // 设置COM引脚硬件配置
    OLED_write_cmd(0x12);
    OLED_write_cmd(0xDB); // 设置VCOMH电压倍率
    OLED_write_cmd(0x40);
    OLED_write_cmd(0x8D); // 设置电荷泵使能/禁用
    OLED_write_cmd(0x14);
    OLED_write_cmd(0xAF); // 打开OLED显示
}

void OLED_clear() {
    for(int i = 0; i < 8; i++) {
        OLED_write_cmd(0xB0 + i);
        OLED_write_cmd(0x00);
        OLED_write_cmd(0x10);
        
        for(int j = 0; j < 128; j++)
            OLED_write_data(0x00);
    }
}

void OLED_display(unsigned char page, unsigned char column, unsigned char *text) {
    OLED_write_cmd(0xB0 + page);
    OLED_write_cmd(((column & 0xF0) >> 4) | 0x10);
    OLED_write_cmd(column & 0x0F);
    
    for(int i = 0; i < 8; i++)
        OLED_write_data(text[i]);
}

void main() {
    OLED_init();
    OLED_clear();
    
    unsigned char text[8] = {
        0x00, 0x3C, 0x42, 0x42, 0x3C, 0x00, 0x00, 0x00
    };
    
    OLED_display(0, 0, text);
    
    while(1);
}

请注意，该代码假设你已将OLED 12864屏幕的串行时钟线连接到C51单片机的P1.0引脚，串行数据线连接到P1.1引脚。你可以根据实际情况进行调整。确保在使用该代码之前，你已经正确地连接了C51单片机与OLED 12864屏幕。