基于STM32的OLED 屏幕驱动

本实验基于STM32F103ZET6单片机，OLED 屏幕IIC接口，使用的单片机引脚为PC8，PC9，OLED 屏幕上显示BMP图片，所以需要事先准备好一张BMP图片；

unsigned char show1[]=
{
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,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0xC0,0x40,0x40,0x40,0x60,0x20,0x20,
0x20,0x20,0x20,0x20,0x20,0x60,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xC0,0x60,0x20,
0x30,0x10,0x18,0x08,0x08,0x04,0x04,0x04,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x06,0x04,0x04,0x0C,0x08,0x90,
0xF0,0x30,0x68,0xCC,0xC6,0x43,0x41,0x40,0x40,0x40,0xC0,0x80,0x80,0x80,0x00,0x00,
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,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE0,0x38,0x0E,0x01,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x01,0x03,0x02,0x02,0x02,0x02,0x02,0x02,0x06,0x04,0x07,
0x0C,0x08,0x08,0x08,0x10,0x10,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x01,
0x02,0x06,0x1C,0xF0,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xF8,0x0F,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x07,0x78,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x38,0xC0,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xF8,0x0C,0x04,0x04,0x04,0x04,0x0C,0x38,0xE0,
0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x07,0x18,0xE0,0x80,0x00,
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,
0x00,0x00,0x00,0xC0,0x30,0x0E,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xE0,0x18,0x0C,0x06,0x02,0x01,
0x01,0x01,0x01,0x01,0x01,0x01,0x03,0xCE,0x78,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x1F,0x70,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,
0x1F,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x03,
0x0C,0x18,0x30,0x20,0x60,0xC0,0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x40,0x20,0x20,0x30,0x10,0x08,
0x0C,0x06,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x38,0x07,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x80,0x80,0x40,0x60,0x30,0x0F,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x07,0x0C,0x18,0x10,0x10,0x10,
0x18,0x0F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x03,0x02,0x02,0x06,0x04,0x04,0x04,
0x04,0x04,0x0C,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x04,0x04,
0x04,0x04,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x08,0x0C,0x04,0x04,0x06,0x02,0x02,0x01,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

OLED初始化

void OLED_Init()
{
	GPIO_InitTypeDef  GPIO_InitStructure;
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC, ENABLE);
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9; 
 	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; 	//推挽输出
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//速度50MHz
 	GPIO_Init(GPIOC, &GPIO_InitStructure);	 
 	GPIO_SetBits(GPIOC,GPIO_Pin_8|GPIO_Pin_9);	//拉高电?
	delay_ms(500);
	
//对应OLED 屏幕的基本寄存器的初始化，对应屏幕型号。				  
	OLED_WR_Byte(0xAE,OLED_CMD); //关闭显示
	OLED_WR_Byte(0xD5,OLED_CMD); //设置时钟分频因子,震荡频率
	OLED_WR_Byte(80,OLED_CMD);   //[3:0],分频因子;[7:4],震荡频率
	OLED_WR_Byte(0xA8,OLED_CMD); //设置驱动路数
	OLED_WR_Byte(0X3F,OLED_CMD); //默认0X3F(1/64) 
	OLED_WR_Byte(0xD3,OLED_CMD); //设置显示偏移
	OLED_WR_Byte(0X00,OLED_CMD); //默认为0

	OLED_WR_Byte(0x40,OLED_CMD); //设置显示开始行 [5:0],行数.
													    
	OLED_WR_Byte(0x8D,OLED_CMD); //电荷泵设置
	OLED_WR_Byte(0x14,OLED_CMD); //bit2，开启/关闭
	OLED_WR_Byte(0x20,OLED_CMD); //设置内存地址模式
	OLED_WR_Byte(0x02,OLED_CMD); //[1:0],00，列地址模式;01，行地址模式;10,页地址模式;默认10;
	OLED_WR_Byte(0xA1,OLED_CMD); //段重定义设置,bit0:0,0->0;1,0->127;
	OLED_WR_Byte(0xC0,OLED_CMD); //设置COM扫描方向;bit3:0,普通模式;1,重定义模式 COM[N-1]->COM0;N:驱动路数
	OLED_WR_Byte(0xDA,OLED_CMD); //设置COM硬件引脚配置
	OLED_WR_Byte(0x12,OLED_CMD); //[5:4]配置
		 
	OLED_WR_Byte(0x81,OLED_CMD); //对比度设置
	OLED_WR_Byte(0xEF,OLED_CMD); //1~255;默认0X7F (亮度设置,越大越亮)
	OLED_WR_Byte(0xD9,OLED_CMD); //设置预充电周期
	OLED_WR_Byte(0xf1,OLED_CMD); //[3:0],PHASE 1;[7:4],PHASE 2;
	OLED_WR_Byte(0xDB,OLED_CMD); //设置VCOMH 电压倍率
	OLED_WR_Byte(0x30,OLED_CMD); //[6:4] 000,0.65*vcc;001,0.77*vcc;011,0.83*vcc;

	OLED_WR_Byte(0xA4,OLED_CMD); //全局显示开启;bit0:1,开启;0,关闭;(白屏/黑屏)
	OLED_WR_Byte(0xA6,OLED_CMD); //设置显示方式;bit0:1,反相显示;0,正常显示	    						   
	OLED_WR_Byte(0xAF,OLED_CMD); //开启显示	 
	OLED_Clear();
	OLED_Refresh_Gram();
}

该屏幕基于IIC接口，所以需包含IIC协议的内容：起始信号OLED_IICStart()和停止信号OLED_IICStop()。

void OLED_IICStart()
{
   OLED_SCL = 1;                
   OLED_SDA = 1;
   OLED_SDA = 0;
   OLED_SCL = 0;
}

void OLED_IICStop()
{
   OLED_SCL = 0;
   OLED_SDA = 0;
   OLED_SCL = 1;
   OLED_SDA = 1;
}

写数据：写一个字节

void OLED_Byte(u8 dat)//写一个字节
{
	 u8 i;	 
	 for(i=0;i<8;i++)
	 {
			if(dat & 0x80)
							OLED_SDA=1;
			else
							OLED_SDA=0;
			OLED_SCL=1;
			OLED_SCL=0;
			dat<<=1;
	 }
	 OLED_SDA=1;
	 OLED_SCL=1;
	 OLED_SCL=0;	 
}

void OLED_WR_Byte(u8 dat,u8 cmd)//写数据还是写命令  cmd控制命令还是数据
{
   if(cmd == 1)
	 {
	    OLED_IICStart();
		  OLED_Byte(0X78);
		  OLED_Byte(0X40);
		  OLED_Byte(dat);
		  OLED_IICStop();
	 }
	 else
	 {
	    OLED_IICStart();
		  OLED_Byte(0X78);
		  OLED_Byte(0X00);
		  OLED_Byte(dat);
		  OLED_IICStop();
	 }
}

更新OLED 屏幕

//更新显存到LCD		 
void OLED_Refresh_Gram(void)
{
	u8 i,n;		    
	for(i=0;i<8;i++)  
	{  
		OLED_WR_Byte (0xb0+i,OLED_CMD);    //设置页地址（0~7）
		OLED_WR_Byte (0x00,OLED_CMD);      //设置显示位置—列低地址
		OLED_WR_Byte (0x10,OLED_CMD);      //设置显示位置—列高地址   
		for(n=0;n<128;n++)OLED_WR_Byte(OLED_GRAM[n][i],OLED_DATA); 
	}   
}

清除屏幕

//清屏函数,清完屏,整个屏幕是黑色的!和没点亮一样!!!	  
void OLED_Clear(void)  
{  
	u8 i,n;		    
	for(i=0;i<8;i++)  
	{    
		for(n=0;n<128;n++)
		{
			OLED_GRAM[n][i]=0;
		}
	}
	OLED_Refresh_Gram();//更新显示 
}

显示BMP图片函数

//显示BMP图片128×64
//起始点坐标(x,y),x的范围0～127，y为页的范围0～7
void OLED_DrawBMP(u8 x0, u8 y0,u8 x1, u8 y1,u8 BMP[])
{ 	
 	u16 j=0;
 	u8 x,y;
  
	for(y=y0;y

主函数

int main()
{
	delay_init();
	OLED_Init(); 
	OLED_Clear();
	OLED_DrawBMP(0,0,128,8,show1);
	delay_ms(1000);
	while(1);;		
}