STM32——OLED显示字符串

一、工程整体功能

使用 STM32F103 的硬件 IIC1（PB6=SCL，PB7=SDA） 驱动 0.96 寸 OLED 屏：

屏幕全屏点亮
全屏熄灭
显示字符串 Hello world（两种字号）

二、文件分工

main.c：主函数，负责初始化、调用 OLED 功能
oled.c：OLED 核心驱动（IIC 初始化、写命令、写数据、显示字符）
oled.h：函数声明
codetab.h：字库（显示文字需要的点阵数据）

三、main.c 逐行解释

复制代码

#include "stm32f10x.h"
#include "main.h"
#include "stdio.h"
#include "oled.h"

// 软件毫秒延时（粗略）
void delay(uint16_t time)
{
	uint16_t i = 0;
	while(time--)
	{
		i = 12000;
		while(i--);
	}
}

int main()
{
    // 中断分组（必须配置）
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
	
    // 初始化硬件IIC
    I2C_Configuration();
    // 初始化OLED
    OLED_Init();
    delay(2000);
	
    // 全屏点亮（全白）
    OLED_Fill(0XFF);
    delay(2000);
	
    // 全屏熄灭（全黑）
    OLED_Fill(0X00);
    delay(2000);
	
    // 在第3行显示小字 Hello world
    OLED_ShowStr(0,3,(unsigned char *)"Hello world",1);
    // 在第4行显示大字 Hello world
    OLED_ShowStr(0,4,(unsigned char *)"Hello world",2);
	
	while(1)
    {
        // 死循环保持显示
    }
}

主流程

初始化 IIC → 初始化 OLED → 亮屏 → 灭屏 → 显示文字 → 保持显示

四、oled.c 终极详细拆解

整个 oled.c 只做 4 件事：

初始化 IIC（和 OLED 通信的总线）
写命令（配置 OLED：开关、亮度、模式）
写数据（往屏幕里画点）
显示函数（清屏、显示字符串）

模块 1：I2C 初始化（I2C_Configuration）

复制代码

void I2C_Configuration(void)
{
	I2C_InitTypeDef I2C_InitStructure;
	GPIO_InitTypeDef GPIO_Initstructure;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,  ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1 ,  ENABLE);

解释：

定义结构体：用来配置 GPIO 和 I2C
开时钟 ：
- GPIOB 时钟：PB6/PB7 要用作 I2C
- I2C1 时钟：硬件 I2C 必须开时钟不开时钟 → 外设完全不工作
//PB6 --SCL;PB7 --SDA
GPIO_Initstructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_Initstructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_Initstructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_Initstructure);

解释：

PB6 = SCL（时钟线）
PB7 = SDA（数据线）
模式必须是 AF_OD（复用开漏） I2C 通信标准要求，推挽输出会烧坏

I2C_DeInit(I2C1);
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_ClockSpeed = 400000;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_OwnAddress1 = 0x33;
I2C_Init(I2C1, &I2C_InitStructure);
I2C_Cmd(I2C1, ENABLE);
}

解释：

复位 I2C
开启 ACK 应答
7 位地址
速度 400KHz（OLED 标准速度）
配置成 I2C 模式
最后启动 I2C

模块 2：I2C 写一个字节（核心通信函数）

复制代码

void I2C_WriteByte(uint8_t addr,uint8_t data)
{
	while( I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY) );

解释：

等待 I2C 总线空闲如果忙，就等着，不忙再开始通信。

复制代码

I2C_GenerateSTART(I2C1, ENABLE);
while( !I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT) );

解释：

产生起始信号
等待变成主机模式

I2C_Send7bitAddress(I2C1, OLED_ADDRESS, I2C_Direction_Transmitter);
while( !I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) );

解释：

发送 OLED 地址 0x78
等待 OLED 应答

I2C_SendData(I2C1, addr);
while( !I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED) );

I2C_SendData(I2C1, data);
while( !I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED) );

解释：

先发送 控制字节（命令 / 数据）
再发送 数据 / 命令内容
每发一个字节，必须等待发送完成

I2C_GenerateSTOP(I2C1, ENABLE);
}

解释：

发送停止信号，结束一次通信

模块 3：写命令（控制 OLED 行为）

复制代码

void WriteCmd(unsigned char I2C_Command)
{
	I2C_WriteByte(0x00,I2C_Command);
}

解释：

0x00 = 告诉 OLED：这是命令
比如：清屏、设置坐标、开关屏幕

模块 4：写数据（往屏幕里画点）

复制代码

void WriteData(unsigned char I2C_Data)
{
	I2C_WriteByte(0x40,I2C_Data);
}

解释：

0x40 = 告诉 OLED：这是要显示的数据
就是画点、写字、画图案

模块 5：OLED 初始化（开机必须执行）

复制代码

void OLED_Init(void)
{
	delay_ms(100);
	WriteCmd(0xAE); // 关屏幕
	WriteCmd(0x20); // 设置地址模式
	WriteCmd(0x02); // 页地址模式

解释：

页地址模式 = 0x02

复制代码

	WriteCmd(0xb0); // 从第0页开始
	WriteCmd(0xc8); // 扫描方向
	WriteCmd(0x00); // 列地址低字节
	WriteCmd(0x10); // 列地址高字节
	WriteCmd(0x40); // 开始行地址

解释：

这些都是固定配置，OLED 必须按这个流程初始化才能工作。

复制代码

	WriteCmd(0x81); // 对比度
	WriteCmd(0xff); // 亮度最大
	WriteCmd(0xa1); // 左右反转
	WriteCmd(0xa6); // 正常显示
	WriteCmd(0xa8); // 复用率
	WriteCmd(0x3F);

	WriteCmd(0xd3); // 显示偏移
	WriteCmd(0x00);
	WriteCmd(0xd5); // 时钟分频
	WriteCmd(0xf0);
	WriteCmd(0xd9); // 预充电
	WriteCmd(0x22);
	WriteCmd(0xda); // 硬件配置
	WriteCmd(0x12);
	WriteCmd(0xdb); // VCOM 电压
	WriteCmd(0x20);

	WriteCmd(0x8d); // 电荷泵
	WriteCmd(0x14);   // 开启
	WriteCmd(0xaf);   // 开屏幕
}

总结：

初始化 = 让 OLED 从断电状态变成可工作状态少一句都不亮！

模块 6：设置光标坐标（写字的位置）

复制代码

void OLED_Setpos(unsigned char x,unsigned char y)
{
	WriteCmd(0xb0 + y);       // 设置页（行）
	WriteCmd((x&0xf0)>>4|0x10); // 列高4位
	WriteCmd(x & 0x0F);        // 列低4位
}

解释：

x：列（0~127）
y：页（0~7）这就是控制字符显示在哪里之前乱码就是这里写错！

模块 7：全屏填充（点亮 / 熄灭整个屏幕）

复制代码

void OLED_Fill(unsigned char Fill_Data)
{
	unsigned char m,n;
	for(m=0;m<8;m++)
	{
		WriteCmd(0xb0+m);
		WriteCmd(0x00);
		WriteCmd(0x10);
		for(n=0;n<128;n++)
		{
			WriteData(Fill_Data);
		}
	}
}

解释：

8 行 × 128 列
逐行逐列写数据
0x00 = 全黑
0xFF = 全亮

模块 8：显示字符串（最核心！）

复制代码

void OLED_ShowStr(...)
{

两种字号：

6x8 小字
8x16 大字

case1: 小字
for(i=0;i<6;i++)
WriteData(F6x8[c][i]);

取字库数据，逐列写进去

复制代码

case2: 大字
第一行 WriteData(F8X16...)
第二行 WriteData(F8X16+8)

解释：

16×8 字体占两页所以必须写：

复制代码

OLED_Setpos(x,y);    // 上半部分
OLED_Setpos(x,y+1);  // 下半部分

最终总结（你必须记住的 4 句话）

I2C 是通信通道
WriteCmd 是发命令
WriteData 是画点写字
字库 F6x8 / F8X16 存储字符形状

五、oled.h 解释

复制代码

#ifndef _OLED_H_
#define _OLED_H_
#include "stm32f10x.h"
#define OLED_ADDRESS 0X78   // OLED的IIC地址

void I2C_Configuration(void);
void I2C_WriteByte(uint8_t addr,uint8_t data);
void WriteCmd(unsigned char I2C_Command);	
void WriteData(unsigned char I2C_Data);
void OLED_Init(void);
// ...其他函数声明
#endif

作用：声明函数，让 main.c 能调用。

六、codetab.h 解释

F6x8 小字库
F8X16 大字库每个文字对应一串数字，代表像素点亮灭。

const unsigned char F6x8[][6] =
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,// sp
0x00, 0x00, 0x00, 0x2f, 0x00, 0x00,// !
0x00, 0x00, 0x07, 0x00, 0x07, 0x00,// "
0x00, 0x14, 0x7f, 0x14, 0x7f, 0x14,// #
0x00, 0x24, 0x2a, 0x7f, 0x2a, 0x12,// $0x00, 0x62, 0x64, 0x08, 0x13, 0x23,// % 0x00, 0x36, 0x49, 0x55, 0x22, 0x50,// & 0x00, 0x00, 0x05, 0x03, 0x00, 0x00,// ' 0x00, 0x00, 0x1c, 0x22, 0x41, 0x00,// ( 0x00, 0x00, 0x41, 0x22, 0x1c, 0x00,// ) 0x00, 0x14, 0x08, 0x3E, 0x08, 0x14,// * 0x00, 0x08, 0x08, 0x3E, 0x08, 0x08,// + 0x00, 0x00, 0x00, 0xA0, 0x60, 0x00,// , 0x00, 0x08, 0x08, 0x08, 0x08, 0x08,// - 0x00, 0x00, 0x60, 0x60, 0x00, 0x00,// . 0x00, 0x20, 0x10, 0x08, 0x04, 0x02,// / 0x00, 0x3E, 0x51, 0x49, 0x45, 0x3E,// 0 0x00, 0x00, 0x42, 0x7F, 0x40, 0x00,// 1 0x00, 0x42, 0x61, 0x51, 0x49, 0x46,// 2 0x00, 0x21, 0x41, 0x45, 0x4B, 0x31,// 3 0x00, 0x18, 0x14, 0x12, 0x7F, 0x10,// 4 0x00, 0x27, 0x45, 0x45, 0x45, 0x39,// 5 0x00, 0x3C, 0x4A, 0x49, 0x49, 0x30,// 6 0x00, 0x01, 0x71, 0x09, 0x05, 0x03,// 7 0x00, 0x36, 0x49, 0x49, 0x49, 0x36,// 8 0x00, 0x06, 0x49, 0x49, 0x29, 0x1E,// 9 0x00, 0x00, 0x36, 0x36, 0x00, 0x00,// : 0x00, 0x00, 0x56, 0x36, 0x00, 0x00,// ; 0x00, 0x08, 0x14, 0x22, 0x41, 0x00,// < 0x00, 0x14, 0x14, 0x14, 0x14, 0x14,// = 0x00, 0x00, 0x41, 0x22, 0x14, 0x08,// > 0x00, 0x02, 0x01, 0x51, 0x09, 0x06,// ? 0x00, 0x32, 0x49, 0x59, 0x51, 0x3E,// @ 0x00, 0x7C, 0x12, 0x11, 0x12, 0x7C,// A 0x00, 0x7F, 0x49, 0x49, 0x49, 0x36,// B 0x00, 0x3E, 0x41, 0x41, 0x41, 0x22,// C 0x00, 0x7F, 0x41, 0x41, 0x22, 0x1C,// D 0x00, 0x7F, 0x49, 0x49, 0x49, 0x41,// E 0x00, 0x7F, 0x09, 0x09, 0x09, 0x01,// F 0x00, 0x3E, 0x41, 0x49, 0x49, 0x7A,// G 0x00, 0x7F, 0x08, 0x08, 0x08, 0x7F,// H 0x00, 0x00, 0x41, 0x7F, 0x41, 0x00,// I 0x00, 0x20, 0x40, 0x41, 0x3F, 0x01,// J 0x00, 0x7F, 0x08, 0x14, 0x22, 0x41,// K 0x00, 0x7F, 0x40, 0x40, 0x40, 0x40,// L 0x00, 0x7F, 0x02, 0x0C, 0x02, 0x7F,// M 0x00, 0x7F, 0x04, 0x08, 0x10, 0x7F,// N 0x00, 0x3E, 0x41, 0x41, 0x41, 0x3E,// O 0x00, 0x7F, 0x09, 0x09, 0x09, 0x06,// P 0x00, 0x3E, 0x41, 0x51, 0x21, 0x5E,// Q 0x00, 0x7F, 0x09, 0x19, 0x29, 0x46,// R 0x00, 0x46, 0x49, 0x49, 0x49, 0x31,// S 0x00, 0x01, 0x01, 0x7F, 0x01, 0x01,// T 0x00, 0x3F, 0x40, 0x40, 0x40, 0x3F,// U 0x00, 0x1F, 0x20, 0x40, 0x20, 0x1F,// V 0x00, 0x3F, 0x40, 0x38, 0x40, 0x3F,// W 0x00, 0x63, 0x14, 0x08, 0x14, 0x63,// X 0x00, 0x07, 0x08, 0x70, 0x08, 0x07,// Y 0x00, 0x61, 0x51, 0x49, 0x45, 0x43,// Z 0x00, 0x00, 0x7F, 0x41, 0x41, 0x00,// [ 0x00, 0x55, 0x2A, 0x55, 0x2A, 0x55,// 55 0x00, 0x00, 0x41, 0x41, 0x7F, 0x00,// ] 0x00, 0x04, 0x02, 0x01, 0x02, 0x04,// ^ 0x00, 0x40, 0x40, 0x40, 0x40, 0x40,// _ 0x00, 0x00, 0x01, 0x02, 0x04, 0x00,// ' 0x00, 0x20, 0x54, 0x54, 0x54, 0x78,// a 0x00, 0x7F, 0x48, 0x44, 0x44, 0x38,// b 0x00, 0x38, 0x44, 0x44, 0x44, 0x20,// c 0x00, 0x38, 0x44, 0x44, 0x48, 0x7F,// d 0x00, 0x38, 0x54, 0x54, 0x54, 0x18,// e 0x00, 0x08, 0x7E, 0x09, 0x01, 0x02,// f 0x00, 0x18, 0xA4, 0xA4, 0xA4, 0x7C,// g 0x00, 0x7F, 0x08, 0x04, 0x04, 0x78,// h 0x00, 0x00, 0x44, 0x7D, 0x40, 0x00,// i 0x00, 0x40, 0x80, 0x84, 0x7D, 0x00,// j 0x00, 0x7F, 0x10, 0x28, 0x44, 0x00,// k 0x00, 0x00, 0x41, 0x7F, 0x40, 0x00,// l 0x00, 0x7C, 0x04, 0x18, 0x04, 0x78,// m 0x00, 0x7C, 0x08, 0x04, 0x04, 0x78,// n 0x00, 0x38, 0x44, 0x44, 0x44, 0x38,// o 0x00, 0xFC, 0x24, 0x24, 0x24, 0x18,// p 0x00, 0x18, 0x24, 0x24, 0x18, 0xFC,// q 0x00, 0x7C, 0x08, 0x04, 0x04, 0x08,// r 0x00, 0x48, 0x54, 0x54, 0x54, 0x20,// s 0x00, 0x04, 0x3F, 0x44, 0x40, 0x20,// t 0x00, 0x3C, 0x40, 0x40, 0x20, 0x7C,// u 0x00, 0x1C, 0x20, 0x40, 0x20, 0x1C,// v 0x00, 0x3C, 0x40, 0x30, 0x40, 0x3C,// w 0x00, 0x44, 0x28, 0x10, 0x28, 0x44,// x 0x00, 0x1C, 0xA0, 0xA0, 0xA0, 0x7C,// y 0x00, 0x44, 0x64, 0x54, 0x4C, 0x44,// z 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,// horiz lines }; const unsigned char F8X16[]= { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,// 0 0x00,0x00,0x00,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x33,0x30,0x00,0x00,0x00,//! 1 0x00,0x10,0x0C,0x06,0x10,0x0C,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//" 2 0x40,0xC0,0x78,0x40,0xC0,0x78,0x40,0x00,0x04,0x3F,0x04,0x04,0x3F,0x04,0x04,0x00,//# 3 0x00,0x70,0x88,0xFC,0x08,0x30,0x00,0x00,0x00,0x18,0x20,0xFF,0x21,0x1E,0x00,0x00,//$ 4
0xF0,0x08,0xF0,0x00,0xE0,0x18,0x00,0x00,0x00,0x21,0x1C,0x03,0x1E,0x21,0x1E,0x00,//% 5
0x00,0xF0,0x08,0x88,0x70,0x00,0x00,0x00,0x1E,0x21,0x23,0x24,0x19,0x27,0x21,0x10,//& 6
0x10,0x16,0x0E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//' 7
0x00,0x00,0x00,0xE0,0x18,0x04,0x02,0x00,0x00,0x00,0x00,0x07,0x18,0x20,0x40,0x00,//( 8
0x00,0x02,0x04,0x18,0xE0,0x00,0x00,0x00,0x00,0x40,0x20,0x18,0x07,0x00,0x00,0x00,//) 9
0x40,0x40,0x80,0xF0,0x80,0x40,0x40,0x00,0x02,0x02,0x01,0x0F,0x01,0x02,0x02,0x00,//* 10
0x00,0x00,0x00,0xF0,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x1F,0x01,0x01,0x01,0x00,//+ 11
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xB0,0x70,0x00,0x00,0x00,0x00,0x00,//, 12
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,//- 13
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,0x00,0x00,//. 14
0x00,0x00,0x00,0x00,0x80,0x60,0x18,0x04,0x00,0x60,0x18,0x06,0x01,0x00,0x00,0x00,/// 15
0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x0F,0x10,0x20,0x20,0x10,0x0F,0x00,//0 16
0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//1 17
0x00,0x70,0x08,0x08,0x08,0x88,0x70,0x00,0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00,//2 18
0x00,0x30,0x08,0x88,0x88,0x48,0x30,0x00,0x00,0x18,0x20,0x20,0x20,0x11,0x0E,0x00,//3 19
0x00,0x00,0xC0,0x20,0x10,0xF8,0x00,0x00,0x00,0x07,0x04,0x24,0x24,0x3F,0x24,0x00,//4 20
0x00,0xF8,0x08,0x88,0x88,0x08,0x08,0x00,0x00,0x19,0x21,0x20,0x20,0x11,0x0E,0x00,//5 21
0x00,0xE0,0x10,0x88,0x88,0x18,0x00,0x00,0x00,0x0F,0x11,0x20,0x20,0x11,0x0E,0x00,//6 22
0x00,0x38,0x08,0x08,0xC8,0x38,0x08,0x00,0x00,0x00,0x00,0x3F,0x00,0x00,0x00,0x00,//7 23
0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00,//8 24
0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x00,0x31,0x22,0x22,0x11,0x0F,0x00,//9 25
0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,//: 26
0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x60,0x00,0x00,0x00,0x00,//; 27
0x00,0x00,0x80,0x40,0x20,0x10,0x08,0x00,0x00,0x01,0x02,0x04,0x08,0x10,0x20,0x00,//< 28
0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x00,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x00,//= 29
0x00,0x08,0x10,0x20,0x40,0x80,0x00,0x00,0x00,0x20,0x10,0x08,0x04,0x02,0x01,0x00,//> 30
0x00,0x70,0x48,0x08,0x08,0x08,0xF0,0x00,0x00,0x00,0x00,0x30,0x36,0x01,0x00,0x00,//? 31
0xC0,0x30,0xC8,0x28,0xE8,0x10,0xE0,0x00,0x07,0x18,0x27,0x24,0x23,0x14,0x0B,0x00,//@ 32
0x00,0x00,0xC0,0x38,0xE0,0x00,0x00,0x00,0x20,0x3C,0x23,0x02,0x02,0x27,0x38,0x20,//A 33
0x08,0xF8,0x88,0x88,0x88,0x70,0x00,0x00,0x20,0x3F,0x20,0x20,0x20,0x11,0x0E,0x00,//B 34
0xC0,0x30,0x08,0x08,0x08,0x08,0x38,0x00,0x07,0x18,0x20,0x20,0x20,0x10,0x08,0x00,//C 35
0x08,0xF8,0x08,0x08,0x08,0x10,0xE0,0x00,0x20,0x3F,0x20,0x20,0x20,0x10,0x0F,0x00,//D 36
0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x20,0x23,0x20,0x18,0x00,//E 37
0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x00,0x03,0x00,0x00,0x00,//F 38
0xC0,0x30,0x08,0x08,0x08,0x38,0x00,0x00,0x07,0x18,0x20,0x20,0x22,0x1E,0x02,0x00,//G 39
0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x20,0x3F,0x21,0x01,0x01,0x21,0x3F,0x20,//H 40
0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//I 41
0x00,0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,0x00,//J 42
0x08,0xF8,0x88,0xC0,0x28,0x18,0x08,0x00,0x20,0x3F,0x20,0x01,0x26,0x38,0x20,0x00,//K 43
0x08,0xF8,0x08,0x00,0x00,0x00,0x00,0x00,0x20,0x3F,0x20,0x20,0x20,0x20,0x30,0x00,//L 44
0x08,0xF8,0xF8,0x00,0xF8,0xF8,0x08,0x00,0x20,0x3F,0x00,0x3F,0x00,0x3F,0x20,0x00,//M 45
0x08,0xF8,0x30,0xC0,0x00,0x08,0xF8,0x08,0x20,0x3F,0x20,0x00,0x07,0x18,0x3F,0x00,//N 46
0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x10,0x20,0x20,0x20,0x10,0x0F,0x00,//O 47
0x08,0xF8,0x08,0x08,0x08,0x08,0xF0,0x00,0x20,0x3F,0x21,0x01,0x01,0x01,0x00,0x00,//P 48
0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x18,0x24,0x24,0x38,0x50,0x4F,0x00,//Q 49
0x08,0xF8,0x88,0x88,0x88,0x88,0x70,0x00,0x20,0x3F,0x20,0x00,0x03,0x0C,0x30,0x20,//R 50
0x00,0x70,0x88,0x08,0x08,0x08,0x38,0x00,0x00,0x38,0x20,0x21,0x21,0x22,0x1C,0x00,//S 51
0x18,0x08,0x08,0xF8,0x08,0x08,0x18,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//T 52
0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//U 53
0x08,0x78,0x88,0x00,0x00,0xC8,0x38,0x08,0x00,0x00,0x07,0x38,0x0E,0x01,0x00,0x00,//V 54
0xF8,0x08,0x00,0xF8,0x00,0x08,0xF8,0x00,0x03,0x3C,0x07,0x00,0x07,0x3C,0x03,0x00,//W 55
0x08,0x18,0x68,0x80,0x80,0x68,0x18,0x08,0x20,0x30,0x2C,0x03,0x03,0x2C,0x30,0x20,//X 56
0x08,0x38,0xC8,0x00,0xC8,0x38,0x08,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//Y 57
0x10,0x08,0x08,0x08,0xC8,0x38,0x08,0x00,0x20,0x38,0x26,0x21,0x20,0x20,0x18,0x00,//Z 58
0x00,0x00,0x00,0xFE,0x02,0x02,0x02,0x00,0x00,0x00,0x00,0x7F,0x40,0x40,0x40,0x00,//[ 59
0x00,0x0C,0x30,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x06,0x38,0xC0,0x00,//\ 60
0x00,0x02,0x02,0x02,0xFE,0x00,0x00,0x00,0x00,0x40,0x40,0x40,0x7F,0x00,0x00,0x00,//] 61
0x00,0x00,0x04,0x02,0x02,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//^ 62
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,//_ 63
0x00,0x02,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//` 64
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x19,0x24,0x22,0x22,0x22,0x3F,0x20,//a 65
0x08,0xF8,0x00,0x80,0x80,0x00,0x00,0x00,0x00,0x3F,0x11,0x20,0x20,0x11,0x0E,0x00,//b 66
0x00,0x00,0x00,0x80,0x80,0x80,0x00,0x00,0x00,0x0E,0x11,0x20,0x20,0x20,0x11,0x00,//c 67
0x00,0x00,0x00,0x80,0x80,0x88,0xF8,0x00,0x00,0x0E,0x11,0x20,0x20,0x10,0x3F,0x20,//d 68
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x22,0x22,0x22,0x22,0x13,0x00,//e 69
0x00,0x80,0x80,0xF0,0x88,0x88,0x88,0x18,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//f 70
0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x6B,0x94,0x94,0x94,0x93,0x60,0x00,//g 71
0x08,0xF8,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//h 72
0x00,0x80,0x98,0x98,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//i 73
0x00,0x00,0x00,0x80,0x98,0x98,0x00,0x00,0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,//j 74
0x08,0xF8,0x00,0x00,0x80,0x80,0x80,0x00,0x20,0x3F,0x24,0x02,0x2D,0x30,0x20,0x00,//k 75
0x00,0x08,0x08,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//l 76
0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x20,0x3F,0x20,0x00,0x3F,0x20,0x00,0x3F,//m 77
0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//n 78
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//o 79
0x80,0x80,0x00,0x80,0x80,0x00,0x00,0x00,0x80,0xFF,0xA1,0x20,0x20,0x11,0x0E,0x00,//p 80
0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x0E,0x11,0x20,0x20,0xA0,0xFF,0x80,//q 81
0x80,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x20,0x20,0x3F,0x21,0x20,0x00,0x01,0x00,//r 82
0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x33,0x24,0x24,0x24,0x24,0x19,0x00,//s 83
0x00,0x80,0x80,0xE0,0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x1F,0x20,0x20,0x00,0x00,//t 84
0x80,0x80,0x00,0x00,0x00,0x80,0x80,0x00,0x00,0x1F,0x20,0x20,0x20,0x10,0x3F,0x20,//u 85
0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x00,0x01,0x0E,0x30,0x08,0x06,0x01,0x00,//v 86
0x80,0x80,0x00,0x80,0x00,0x80,0x80,0x80,0x0F,0x30,0x0C,0x03,0x0C,0x30,0x0F,0x00,//w 87
0x00,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x31,0x2E,0x0E,0x31,0x20,0x00,//x 88
0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x80,0x81,0x8E,0x70,0x18,0x06,0x01,0x00,//y 89
0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x21,0x30,0x2C,0x22,0x21,0x30,0x00,//z 90
0x00,0x00,0x00,0x00,0x80,0x7C,0x02,0x02,0x00,0x00,0x00,0x00,0x00,0x3F,0x40,0x40,//{ 91
0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,//| 92
0x00,0x02,0x02,0x7C,0x80,0x00,0x00,0x00,0x00,0x40,0x40,0x3F,0x00,0x00,0x00,0x00,//} 93
0x00,0x06,0x01,0x01,0x02,0x02,0x04,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//~ 94
};

七、整体运行流程

初始化 IIC
初始化 OLED
全屏亮 → 全屏灭
在指定位置显示文字
保持显示