基于15单片机OLED显示屏代码

基于15单片机的OLED显示屏代码，可以使用一些OLED驱动芯片，如SSD1306、SH1106等。这里以SSD1306为例，提供一份基础的OLED显示屏代码：

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

#define SCL P2_1
#define SDA P2_0
#define OLED_ADDR 0x78

void delay(int time) {
    int i, j;
    for (i = 0; i < time; i++) {
        for (j = 0; j < 100; j++);
    }
}

void iic_start() {
    SDA = 1;
    SCL = 1;
    _nop_();
    SDA = 0;
    _nop_();
    SCL = 0;
}

void iic_stop() {
    SDA = 0;
    SCL = 1;
    _nop_();
    SDA = 1;
    _nop_();
    SCL = 0;
}

void iic_write_byte(unsigned char dat) {
    int i;
    for (i = 0; i < 8; i++) {
        SDA = dat & 0x80;
        SCL = 1;
        _nop_();
        _nop_();
        SCL = 0;
        dat <<= 1;
    }
}

void oled_init() {
    iic_start();
    iic_write_byte(OLED_ADDR);
    iic_write_byte(0xAE);
    iic_write_byte(0x00);
    iic_write_byte(0x10);
    iic_write_byte(0x40);
    iic_write_byte(0x81);
    iic_write_byte(0xCF);
    iic_write_byte(0xA1);
    iic_write_byte(0xC8);
    iic_write_byte(0xA6);
    iic_write_byte(0xA8);
    iic_write_byte(0x3F);
    iic_write_byte(0xD3);
    iic_write_byte(0x00);
    iic_write_byte(0xD5);
    iic_write_byte(0x80);
    iic_write_byte(0xD9);
    iic_write_byte(0xF1);
    iic_write_byte(0xDA);
    iic_write_byte(0x12);
    iic_write_byte(0xDB);
    iic_write_byte(0x20);
    iic_write_byte(0x8D);
    iic_write_byte(0x14);
    iic_write_byte(0xAF);
    iic_stop();
}

void oled_set_pos(unsigned char x, unsigned char y) {
    iic_start();
    iic_write_byte(OLED_ADDR);
    iic_write_byte(0xb0 + y);
    iic_write_byte(((x & 0xf0) >> 4) | 0x10);
    iic_write_byte((x & 0x0f) | 0x00);
    iic_stop();
}

void oled_show_char(unsigned char x, unsigned char y, unsigned char chr) {
    unsigned char c = 0, i = 0;
    c = chr - ' ';
    oled_set_pos(x, y);
    for (i = 0; i < 8; i++) {
        iic_write_byte(font8x16[c * 16 + i]);
    }
    oled_set_pos(x, y + 1);
    for (i = 0; i < 8; i++) {
        iic_write_byte(font8x16[c * 16 + i + 8]);
    }
}

void oled_show_string(unsigned char x, unsigned char y, unsigned char *str) {
    unsigned char j = 0;
    while (str[j] != '\0') {
        oled_show_char(x, y, str[j]);
        x += 8;
        if (x > 120) {
            x = 0;
            y += 2;
        }
        j++;
    }
}

void oled_clear() {
    unsigned char i, n;
    for (i = 0; i < 8; i++) {
        iic_start();
        iic_write_byte(OLED_ADDR);
        iic_write_byte(0xb0 + i);
        iic_write_byte(0x00);
        iic_write_byte(0x10);
        for (n = 0; n < 128; n++) {
            iic_write_byte(0x00);
        }
        iic_stop();
    }
}

void main() {
    oled_init();
    oled_clear();
    oled_show_string(0, 0, "Hello, world!");
    while (1);
}

以上代码使用了基于IIC通信协议的OLED驱动方式，支持在OLED上显示字符串等信息。在使用时，需要将字库文件font8x16.h包含进来，其中定义了一些常用字符的字模信息。此外，还需要根据具体的OLED型号，修改一些初始化命令和通信地址等参数。