查看“OLED显示屏使用”的源代码

== 目的 ==
了解Microduino OLED，并掌握如何驱动OLED显示屏。
== 设备 ==
*'''[[Microduino-OLED/zh]]'''
Microduino-Oled是基于SSD1306的0.96吋128x64 OLED显示模块。采用I2C接口，3.3V 电源供电。像素为128*64（128列*64行）。
*'''[[Microduino-CoreSTM32/zh]]'''
Microduino-CoreSTM32小巧精悍，其内核来自于ARM公司具有突破性的Cortex-M3内核的32位闪存微控制器。该内核是专门设计于满足集高性能、低功耗、实时应用、具有竞争性价格于一体的嵌入式领域的要求。
*'''[[Microduino-Weather/zh|Microduino-Weather扩展板]] '''
Microduino Weather模块集成了三种传感器，分别是光照强度传感器（TSL2561），数字气压传感器（BMP180），数字温湿度传感器（AM2321）。采用I2C接口与核心相连。广泛用于气象监测。
* 其他硬件设备
:*OLED转接线 一根
:*USB数据线 一根
[[File:advance9_1.jpg|600px|center|thumb]]

==  文档 ==
*12864Oled显示屏：2864HSWEG01 '''[[File:2864HSWEG01.pdf]]'''
*驱动芯片：SSD1306  '''[[File:SSD1306-Revision 1.1.pdf]]'''

== 原理图 ==
=== I2C接口 ===
I2C（Inter－Integrated Circuit）总线是由PHILIPS公司开发的两线式串行总线。I2C 串行总线有两根信号线：一根双向的数据线 SDA；另一根是时钟线 SCL。所有接到 I2C 总线上的设备的串行数据都接到总线的 SDA 线，各设备的时钟线 SCL接到总线的 SCL，每个设备都有唯一的地址。

'''I2C通讯接法如下：'''
[[File:advance9_2.jpg|600px|center|thumb]]

''' 原理图 :'''

[[File:advance9_3.jpg|600px|center|thumb]]
本讲实际接线采用了[[Microduino-Weather/zh|Microduino Weather]]模块，将OLED转接线直接插在[[Microduino-Weather/zh|Microduino Weather]]模块上即可。
[[File:advance9_4.jpg|600px|center|thumb]]
'''注意:OLED转接线不要用错。SCL接[[Microduino-CoreSTM32/zh]]的SCL，SDA接[[Microduino-CoreSTM32/zh]]的SDA,'''

== 程序 ==
用到的库：Wire库
<source lang="cpp">
#include <Wire.h>
unsigned char  show1[]=
{
        0x00,0x03,0x05,0x09,0x11,0xFF,0x11,0x89,0x05,0xC3,0x00,0xE0,0x00,0xF0,0x00,0xF8,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x44,0x28,0xFF,0x11,0xAA,0x44,0x00,0x00,0x00,
	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,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x83,0x01,0x38,0x44,0x82,0x92,
	0x92,0x74,0x01,0x83,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0x44,0xFF,0x01,0x7D,
	0x7D,0x7D,0x01,0x7D,0x7D,0x7D,0x7D,0x01,0x7D,0x7D,0x7D,0x7D,0x7D,0x01,0xFF,0x00,
	0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x01,0x00,0x01,0x00,0x01,0x00,0x01,0x00,0x01,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x00,0x00,0x00,0x00,0x00,
	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,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x00,0x00,0x00,0x00,
	0x00,0x00,0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x01,
	0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3F,0x3F,0x03,0x03,
	0xF3,0x13,0x11,0x11,0x11,0x11,0x11,0x11,0x01,0xF1,0x11,0x61,0x81,0x01,0x01,0x01,
	0x81,0x61,0x11,0xF1,0x01,0x01,0x01,0x01,0x41,0x41,0xF1,0x01,0x01,0x01,0x01,0x01,
	0xC1,0x21,0x11,0x11,0x11,0x11,0x21,0xC1,0x01,0x01,0x01,0x01,0x41,0x41,0xF1,0x01,
	0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x11,0x11,0x11,0x11,0x11,0xD3,0x33,
	0x03,0x03,0x3F,0x3F,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,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE0,0xE0,0x00,0x00,
	0x7F,0x01,0x01,0x01,0x01,0x01,0x01,0x00,0x00,0x7F,0x00,0x00,0x01,0x06,0x18,0x06,
	0x01,0x00,0x00,0x7F,0x00,0x00,0x00,0x00,0x40,0x40,0x7F,0x40,0x40,0x00,0x00,0x00,
	0x1F,0x20,0x40,0x40,0x40,0x40,0x20,0x1F,0x00,0x00,0x00,0x00,0x40,0x40,0x7F,0x40,
	0x40,0x00,0x00,0x00,0x00,0x60,0x00,0x00,0x00,0x00,0x40,0x30,0x0C,0x03,0x00,0x00,
	0x00,0x00,0xE0,0xE0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	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,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x07,0x06,0x06,
	0x06,0x06,0x04,0x04,0x04,0x84,0x44,0x44,0x44,0x84,0x04,0x04,0x84,0x44,0x44,0x44,
	0x84,0x04,0x04,0x04,0x84,0xC4,0x04,0x04,0x04,0x04,0x84,0x44,0x44,0x44,0x84,0x04,
	0x04,0x04,0x04,0x04,0x84,0x44,0x44,0x44,0x84,0x04,0x04,0x04,0x04,0x04,0x84,0x44,
	0x44,0x44,0x84,0x04,0x04,0x84,0x44,0x44,0x44,0x84,0x04,0x04,0x04,0x04,0x06,0x06,
	0x06,0x06,0x07,0x07,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	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,
	0x00,0x00,0x00,0x00,0x00,0x10,0x18,0x14,0x12,0x11,0x00,0x00,0x0F,0x10,0x10,0x10,
	0x0F,0x00,0x00,0x00,0x10,0x1F,0x10,0x00,0x00,0x00,0x08,0x10,0x12,0x12,0x0D,0x00,
	0x00,0x18,0x00,0x00,0x0D,0x12,0x12,0x12,0x0D,0x00,0x00,0x18,0x00,0x00,0x10,0x18,
	0x14,0x12,0x11,0x00,0x00,0x10,0x18,0x14,0x12,0x11,0x00,0x00,0x00,0x00,0x00,0x00,
	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,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x80,0x80,
	0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	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,
	0x00,0x7F,0x03,0x0C,0x30,0x0C,0x03,0x7F,0x00,0x00,0x38,0x54,0x54,0x58,0x00,0x00,
	0x7C,0x04,0x04,0x78,0x00,0x00,0x3C,0x40,0x40,0x7C,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xAA,0xAA,0xAA,
	0x28,0x08,0x00,0xFF,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,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7F,0x03,0x0C,0x30,0x0C,0x03,0x7F,
	0x00,0x00,0x26,0x49,0x49,0x49,0x32,0x00,0x00,0x7F,0x02,0x04,0x08,0x10,0x7F,0x00
};
void setup()
{ 
    Wire.begin(18,19);//18--SDA   19--SCL
    SerialUSB.println(" I2C Initializing... ");
    Initial_OLED();
    SerialUSB.println(" OLED 42242Initializing... ");
    delay(5);
}
void loop() 
{
  fill_picture(0xff);  
  delay(1000);    
  fill_picture(0xf0); 
  delay(1000);  
  picture_1();//display a picture
  delay(1000);
}
void Write_IIC_Command(unsigned char IIC_Command)
{
   Wire.beginTransmission(0x3C);  //slave address  011110+SA0+RW  - 0x3C or 0x3D
   Wire.send(0x00);	          //write command
   Wire.send(IIC_Command); 
   Wire.endTransmission();
}
void Write_IIC_Data(unsigned char IIC_Data)
{
   Wire.beginTransmission(0x3C);
   Wire.send(0x40);		//write data
   Wire.send(IIC_Data); 
   Wire.endTransmission();
}
void Initial_OLED()
{
  Write_IIC_Command(0xAE);        //display off
  Write_IIC_Command(0x20);	//Set Memory Addressing Mode	
  Write_IIC_Command(0x10);	//00,Horizontal Addressing Mode;01,Vertical Addressing Mode;10,Page Addressing Mode (RESET);11,Invalid
  Write_IIC_Command(0xb0);	//Set Page Start Address for Page Addressing Mode,0-7
  Write_IIC_Command(0xc8);	//Set COM Output Scan Direction
  Write_IIC_Command(0x00);        //---set low column address
  Write_IIC_Command(0x10);        //---set high column address
  Write_IIC_Command(0x40);        //--set start line address
  Write_IIC_Command(0x81);        //--set contrast control register
  Write_IIC_Command(0x7f);
  Write_IIC_Command(0xa1);        //--set segment re-map 0 to 127
  Write_IIC_Command(0xa6);        //--set normal display
  Write_IIC_Command(0xa8);        //--set multiplex ratio(1 to 64)
  Write_IIC_Command(0x3F);        //
  Write_IIC_Command(0xa4);        //0xa4,Output follows RAM content;0xa5,Output ignores RAM content
  Write_IIC_Command(0xd3);        //-set display offset
  Write_IIC_Command(0x00);        //-not offset
  Write_IIC_Command(0xd5);        //--set display clock divide ratio/oscillator frequency
  Write_IIC_Command(0xf0);        //--set divide ratio
  Write_IIC_Command(0xd9);        //--set pre-charge period
  Write_IIC_Command(0x22);        //
  Write_IIC_Command(0xda);       //--set com pins hardware configuration
  Write_IIC_Command(0x12);
  Write_IIC_Command(0xdb);       //--set vcomh
  Write_IIC_Command(0x20);   
  Write_IIC_Command(0x8d);     //--set DC-DC enable
  Write_IIC_Command(0x14);    //
  Write_IIC_Command(0xaf);    //--turn on oled panel 
}
void fill_picture(unsigned char fill_Data)
{
  unsigned char m,n;
  for(m=0;m<8;m++)
  {
    Write_IIC_Command(0xb0+m);		//page0-page1
    Write_IIC_Command(0x00);		//low column start address
    Write_IIC_Command(0x10);		//high column start address    
    for(n=0;n<128;n++)
    {
      Write_IIC_Data(fill_Data);
    }  
  }
}
void picture_1()
{
  unsigned char x,y;
  unsigned int i=0;
  for(y=0;y<8;y++)
    {
      Write_IIC_Command(0xb0+y);
      Write_IIC_Command(0x00);
      Write_IIC_Command(0x10);
      for(x=0;x<128;x++)
        {
          Write_IIC_Data(show1[i++]);
        }
    }
}
</source>
'''  程序说明：'''
*程序实现了两次刷屏和一次图片的循环显示。
*本教程需要使用Wire库，在初始化I2C时不能用Wire.begin()初始化，因为库里默认的SDA和SCL为20和21引脚，需要用Wire.begin(18,19)初始化，或者在Wire.h文件中的引脚定义改为18和19。
*Initial_OLED()为初始化OLED显示屏。
*show1[]数组保存一张图片，在picture_1()调用显示。

== 调试 ==
步骤一：连接好电路。
步骤二：复制程序代码到Maple IDE编译。
步骤三：下载程序代码，观察OLED显示屏的变化。

== 结果 ==
== 视频 ==
视频地址：