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ESP8266 Arduino开发之路（8）— 使用OLED显示文字和图片

ESP8266 Arduino开发之路（8）— 使用OLED显示文字和图片

一、前言

OLED是一种利用多层有机薄膜结构产生电致发光的器件，它很容易制作，而且只需要低的驱动电压，这些主要的特征使得OLED在满足平面显示器的应用上显得非常突出。OLED显示屏比LCD更轻薄、亮度高、功耗低、响应快、清晰度高、柔性好、发光效率高，能满足消费者对显示技术的新需求。

我们最常用的是OLED 0.96 IIC 128×64模块，如下所示，其中0.96指的是屏幕的显示尺寸0.96inch, 128×64指的是屏幕的分辨率为128×64, 而IIC指的是该模块使用IIC协议进行通讯。
在这里插入图片描述
本文参考：Arduino驱动OLED屏幕

二、安装库文件

我们需要使用esp8266-oled-ssd1306库来实现Arduino控制OLED，通过Arduino自带的库管理器来安装，如下所示：
在这里插入图片描述
或者访问开源网址下载：https://github.com/ThingPulse/esp8266-oled-ssd1306/tree/4.2.0

三、显示字母

编写如下代码：

/*
 * ESP8266-NodeMCU通过驱动oled显示文文字和图片
 * 需要使用Arduino-OLED第三方库：https://github.com/ThingPulse/esp8266-oled-ssd1306/tree/4.2.0
 */

/* 使用0.96寸的OLED屏幕需要使用包含这个头文件 */
#include "SSD1306Wire.h"

/* 设置oled屏幕的相关信息 */
const int I2C_ADDR = 0x3c;              // oled屏幕的I2c地址
#define SDA_PIN 4                       // SDA引脚，默认gpio4(D2)
#define SCL_PIN 5                       // SCL引脚，默认gpio5(D1)

/* 新建一个oled屏幕对象，需要输入IIC地址，SDA和SCL引脚号 */
SSD1306Wire oled(I2C_ADDR, SDA_PIN, SCL_PIN);


void setup() {
  /* 1. 初始化串口通讯波特率为115200*/
  Serial.begin(115200);

  /* 2. oled屏幕初始化 */
  oled.init();
  oled.flipScreenVertically();        // 设置屏幕翻转
  oled.setContrast(255);              // 设置屏幕亮度
  drawRect();                         // 测试屏幕显示
  oled.clear(); oled.display();       // 清除屏幕
}

void loop() {
  oled.setFont(ArialMT_Plain_24);     // 设置字体
  oled.drawString(0, 0, "HelloWorld!");     // 将要显示的文字写入缓存
  oled.display();                     // 将缓存里的文字在屏幕上显示
  digitalWrite(LED_BUILTIN, LOW);     // Turn the LED on
  delay(300);
  digitalWrite(LED_BUILTIN, HIGH);    // Turn the LED off
  delay(500);
}

void drawRect(void) {
  for (int16_t i=0; i<oled.getHeight()/2; i+=2) {
    oled.drawRect(i, i, oled.getWidth()-2*i, oled.getHeight()-2*i);
    oled.display();
    delay(50);
  }
}

上传到开发板，可以看到屏幕显示了HelloWorld!
在这里插入图片描述

四、显示汉字

打开取模软件【PCtoLCD】，选择字符模式，
在这里插入图片描述
在菜单栏区点击设置图标
在这里插入图片描述
按如下设置
在这里插入图片描述

然后输入汉字，接着点击生成字模
在这里插入图片描述
然后我们将生成的字模复制到新建一个text.h文件中的数组中，

static const uint8_t text[][60] = {
{0x00,0x00,0x00,0x00,0x00,0x04,0x40,0x00,0x02,0x40,0x00,0x01,0x40,0xC0,0x00,0x40,0x60,0x00,0x40,0x18,0x00,0x40,0x0E,0x00,0x42,0x00,0x00,0x4C,0x00,0x00,0x78,0x00,0x00,0x40,0x00,0x00,0x40,0x06,0x00,0x40,0x08,0x00,0x40,0x10,0x00,0x40,0x60,0x00,0x40,0xC0,0x03,0x60,0x80,0x01,0x40,0x00,0x00,0x00,0x00,0x00},/*"六",0*/
{0x00,0x00,0x00,0x00,0x20,0x00,0x20,0x18,0x00,0x20,0x07,0x00,0xFE,0xFF,0x07,0xA0,0x00,0x00,0x20,0x03,0x04,0x20,0x0C,0x04,0x20,0x0A,0x04,0x2C,0x69,0x02,0xB8,0x58,0x02,0x40,0x8E,0x01,0xFE,0x8B,0x01,0x40,0xC8,0x00,0xB0,0x70,0x01,0x2C,0x11,0x01,0x24,0x0B,0x03,0x20,0x0A,0x06,0x00,0x02,0x00,0x00,0x00,0x00},/*"楼",1*/
{0x00,0x00,0x00,0x00,0x40,0x00,0x88,0x20,0x00,0x88,0x10,0x00,0x88,0x0C,0x00,0xF8,0xFF,0x07,0x84,0x02,0x00,0x84,0x04,0x00,0x84,0x38,0x00,0x00,0x20,0x00,0x00,0x20,0x00,0x10,0x12,0x00,0x60,0x14,0x00,0x00,0x10,0x00,0x00,0x10,0x00,0xFE,0xFF,0x07,0x00,0x08,0x00,0x00,0x08,0x00,0x00,0x08,0x00,0x00,0x00,0x00},/*"科",2*/
{0x00,0x00,0x00,0x00,0x02,0x00,0x00,0x01,0x00,0xC0,0xFF,0x01,0xB0,0x00,0x02,0x8E,0x00,0x02,0x86,0x10,0x02,0x88,0x30,0x02,0x88,0x1F,0x02,0x90,0x00,0x02,0x30,0xC0,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0xE0,0x1F,0x00,0x00,0x00,0x02,0x00,0x00,0x02,0x00,0x00,0x06,0xFC,0xFF,0x03,0x00,0x00,0x00,0x00,0x00,0x00},/*"创",3*/
{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE0,0x0F,0x00,0x20,0x04,0x00,0x20,0x04,0x00,0x20,0x04,0x00,0x20,0x04,0x00,0x20,0x04,0x00,0xFE,0xFF,0x07,0x20,0x04,0x00,0x20,0x04,0x00,0x20,0x04,0x00,0x20,0x04,0x00,0x20,0x04,0x00,0x20,0x04,0x00,0xE0,0x0F,0x00,0x20,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},/*"中",4*/
{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x00,0x00,0x1E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE0,0xFF,0x00,0xE0,0xFF,0x01,0x04,0x00,0x01,0x08,0x00,0x01,0x38,0x00,0x01,0x70,0x00,0x01,0x00,0x00,0x01,0x00,0x00,0x01,0x00,0xF8,0x01,0x00,0x81,0x00,0x00,0x06,0x00,0x00,0x1C,0x00,0x00,0x08,0x00,0x00,0x00,0x00},/*"心",5*/
};

接着修改loop()函数如下所示

void loop() {
  oled.setFont(ArialMT_Plain_24);       // 设置字体
  oled.drawString(0, 0, "HelloWorld!"); // 将要显示的文字写入缓存
  oled.display();                       // 将缓存里的文字在屏幕上显示
  delay(500);
  oled.clear(); oled.display();         // 清除屏幕

  /* 显示汉字 */
  oled.drawFastImage(4 + 20*0, 22, 20, 20, text[0]);
  oled.drawFastImage(4 + 20*1, 22, 20, 20, text[1]);
  oled.drawFastImage(4 + 20*2, 22, 20, 20, text[2]);
  oled.drawFastImage(4 + 20*3, 22, 20, 20, text[3]);
  oled.drawFastImage(4 + 20*4, 22, 20, 20, text[4]);
  oled.drawFastImage(4 + 20*5, 22, 20, 20, text[5]);
  oled.display();

  while(1)
  {
    digitalWrite(LED_BUILTIN, LOW);     // Turn the LED on
    delay(300);
    digitalWrite(LED_BUILTIN, HIGH);    // Turn the LED off
    delay(500);
  }
}

上传到开发板可以看到如下所示效果：
在这里插入图片描述

五、显示图片

将取模软件【PCtoLCD】切换到图形模式，
在这里插入图片描述
点击打开我们需要显示的BMP单色图片
在这里插入图片描述
然后参数设置为如下所示，
在这里插入图片描述
然后将生成的像素点数组复制到新建一个image.h文件中的数组中，需要注意的是，因为图片很大，所以我们需要通过PROGMEM关键字声明将其存放到程序存储空间。

const uint8_t image[] PROGMEM = {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFE,0xC3,0x7F,0x00,0x00,
0x00,0x00,0x80,0xFF,0xFF,0x7F,0x00,0x00,0x00,0x10,0xE0,0xFF,0xFF,0x7F,0x08,0x00,0x00,0xF0,0xFF,0xFF,0xFF,0x3F,0x3C,0x00,
0x00,0xE0,0xFF,0xFF,0xFF,0x3F,0x7C,0x00,0x00,0xC0,0xFF,0x8F,0xFF,0x3F,0xFC,0x00,0x00,0x80,0xFF,0xE3,0xFF,0x3F,0xFE,0x01,
0x00,0x00,0xFE,0xFC,0xFF,0x3F,0xFE,0x03,0x00,0x80,0x7F,0xFE,0xFF,0x00,0xFF,0x07,0x06,0xF0,0x9F,0xFF,0x0F,0x00,0xFF,0x0F,
0xFC,0xFF,0xCF,0xFF,0x07,0x00,0xFC,0x0F,0xF0,0xFF,0xE3,0xFF,0x01,0x00,0xF8,0x1F,0xC0,0xFF,0xF0,0xFF,0x00,0x00,0xE0,0x3F,
0x00,0x0E,0xF8,0x7F,0x00,0x0F,0xE0,0x3F,0x00,0x00,0xFE,0x7F,0xC0,0x7F,0xC0,0x3F,0x00,0x00,0xFF,0x3F,0xE0,0xFF,0x80,0x7F,
0x00,0xC0,0x7F,0x1F,0xF0,0xFF,0x81,0x7F,0x00,0xF0,0x1F,0x1F,0xF8,0xFF,0x83,0x7F,0xF0,0xFF,0x8F,0x0F,0xF8,0xFF,0x83,0x7F,
0xE0,0xFF,0x83,0x07,0xF8,0xFF,0x83,0x7F,0x80,0xFF,0x80,0x03,0xFC,0xFF,0x03,0xFF,0x00,0x00,0x80,0x01,0xFC,0xFF,0x03,0xFF,
0x00,0x00,0xC0,0x00,0xF8,0xFF,0x03,0xFF,0x00,0x00,0x20,0x10,0xF8,0xFF,0x83,0xFF,0x00,0x00,0x00,0x10,0xF8,0xFF,0x83,0x7F,
0x00,0x00,0x00,0x38,0xF0,0xFF,0x81,0x7F,0x00,0x00,0x00,0x3C,0xF0,0xFF,0x80,0x7F,0x00,0x00,0x00,0x3E,0xE0,0x7F,0xC0,0x7F,
0x00,0x00,0x00,0x7F,0x80,0x3F,0xE0,0x3F,0x00,0x00,0x80,0xFF,0x00,0x00,0xE0,0x3F,0x00,0x00,0x80,0xFF,0x01,0x00,0xE0,0x3F,
0x00,0x00,0x00,0xFF,0x03,0x00,0x88,0x1F,0x00,0x00,0x00,0xFE,0x03,0x00,0x1E,0x0F,0x00,0x00,0x00,0xFE,0x19,0x80,0x3F,0x0E,
0x00,0x00,0x00,0xFC,0x78,0xF0,0x7F,0x04,0x00,0x00,0x00,0x78,0xFC,0xFF,0xFF,0x00,0x00,0x00,0x00,0x38,0xFE,0xFF,0xFF,0x01,
0x00,0x00,0x00,0x30,0xFE,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0x7F,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0x1F,0x00,
0x00,0x00,0x00,0x00,0xFE,0xFF,0x0F,0x00,0x00,0x00,0x00,0x00,0xF0,0xFF,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*"Sixlab_Logo.bmp",0*/
};

然后修改主程序代码如下所示

/*
 * ESP8266-NodeMCU通过驱动oled显示文文字和图片
 * 需要使用Arduino-OLED第三方库：https://github.com/ThingPulse/esp8266-oled-ssd1306/tree/4.2.0
 */

/* 使用0.96寸的OLED屏幕需要使用包含这个头文件 */
#include "SSD1306Wire.h"

#include "text.h"
#include "image.h"

/* 设置oled屏幕的相关信息 */
const int I2C_ADDR = 0x3c;              // oled屏幕的I2c地址
#define SDA_PIN 4                       // SDA引脚，默认gpio4(D2)
#define SCL_PIN 5                       // SCL引脚，默认gpio5(D1)

/* 新建一个oled屏幕对象，需要输入IIC地址，SDA和SCL引脚号 */
SSD1306Wire oled(I2C_ADDR, SDA_PIN, SCL_PIN);


void setup() {
  /* 1. 初始化串口通讯波特率为115200*/
  Serial.begin(115200);

  /* 2. oled屏幕初始化 */
  oled.init();
  oled.flipScreenVertically();          // 设置屏幕翻转
  oled.setContrast(255);                // 设置屏幕亮度
  drawRect();                           // 测试屏幕显示
  oled.clear(); oled.display();         // 清除屏幕
}

void loop() {

  /* 1. 显示字母 */
  oled.setFont(ArialMT_Plain_16);       // 设置字体
  oled.drawString(0, 0, "Hello, SixLab!"); // 将要显示的字母写入缓存
  oled.drawString(0, 20, "I am William."); // 将要显示的字母写入缓存
  oled.display();                       // 将缓存里的文字在屏幕上显示
  delay(1300);
  oled.clear(); oled.display();         // 清除屏幕

  /* 2. 显示汉字 */
  oled.drawFastImage(4 + 20*0, 22, 20, 20, text[0]);
  oled.drawFastImage(4 + 20*1, 22, 20, 20, text[1]);
  oled.drawFastImage(4 + 20*2, 22, 20, 20, text[2]);
  oled.drawFastImage(4 + 20*3, 22, 20, 20, text[3]);
  oled.drawFastImage(4 + 20*4, 22, 20, 20, text[4]);
  oled.drawFastImage(4 + 20*5, 22, 20, 20, text[5]);
  oled.display();
  delay(1300);
  oled.clear(); oled.display();         // 清除屏幕
  
  /* 3. 显示图片*/
  oled.drawFastImage(32, 0, 64, 64, image);
  oled.display();
  delay(1300);
  oled.clear(); oled.display();         // 清除屏幕

  /* 4. LED状态取反 */
  digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
    
}

void drawRect(void) {
  for (int16_t i=0; i<oled.getHeight()/2; i+=2) {
    oled.drawRect(i, i, oled.getWidth()-2*i, oled.getHeight()-2*i);
    oled.display();
    delay(50);
  }
}

代码上传到开发板效果如下所示：
在这里插入图片描述

六、附录

上一篇：ESP8266 Arduino开发之路（7）— 使用I2C读写EEPROM
下一篇：

版权声明：本文为CSDN博主「Willliam_william」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/qq_38113006/article/details/118711467

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