一、OLED 简介:
OLED,即有机发光二极管(Organic Light-Emitting Diode),又称为有机电激光显示(Organic Electroluminesence Display, OELD)。因为具备轻薄、省电等特性,因此从 2003 年开始,这种显示设备在 MP3 播放器上得到了广泛应用,而对于同属数码类产品的 DC 与手机,此前只是在一些展会上展示过采用 OLED 屏幕的工程样品。自 2007 年后,寿命得 到很大提高,具备了许多 LCD 不可比拟的优势。
GND:电源地 VCC:2.2V~5.5V SCL(D0):CLK 时钟 (高电平 2.2V~5.5V) SDA(D1):MOSI 数据(高电平 2.2V~5.5V) RST:复位(高电平 2.2V~5.5V) D/C:数据/命令(高电平 2.2V~5.5V) 兼容 3.3V 和 5V 控制芯片的 I/O 电平(无需任何设置,直接兼容)。
二:软件配置:
PCB效果图:
三:硬件驱动IIC代码如下:
void I2C_Configuration(void) { I2C_InitTypeDef I2C_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2,ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;//I2C必须开漏输出 GPIO_Init(GPIOB, &GPIO_InitStructure); I2C_DeInit(I2C2);//使用I2C2 I2C_InitStructure.I2C_Mode = I2C_Mode_I2C; I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2; I2C_InitStructure.I2C_OwnAddress1 = 0x30;//主机的I2C地址,随便写的 I2C_InitStructure.I2C_Ack = I2C_Ack_Enable; I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit; I2C_InitStructure.I2C_ClockSpeed = 1300000;//1300K I2C_Cmd(I2C2, ENABLE); I2C_Init(I2C2, &I2C_InitStructure); } void I2C_WriteByte(uint8_t addr,uint8_t data) { uint8_t i=0; while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY) && i<10) { i++; delay_us(1); } I2C_GenerateSTART(I2C2, ENABLE);//开启I2C2 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT) && i<10)/*EV5,主模式*/ { i++; delay_us(1); } I2C_Send7bitAddress(I2C2, OLED_ADDRESS, I2C_Direction_Transmitter);//器件地址 -- 默认0x78 while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) && i<10) { i++; delay_us(1); } I2C_SendData(I2C2, addr);//寄存器地址 while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED) && i<10) { i++; delay_us(1); } I2C_SendData(I2C2, data);//发送数据 while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED) && i<10) { i++; delay_us(1); } I2C_GenerateSTOP(I2C2, ENABLE);//关闭I2C2总线 } void WriteCmd(unsigned char I2C_Command)//写命令 { I2C_WriteByte(0x00, I2C_Command); } void WriteDat(unsigned char I2C_Data)//写数据 { I2C_WriteByte(0x40, I2C_Data); } void OLED_Init(void) { I2C_Configuration(); delay_ms(100); //这里的延时很重要 WriteCmd(0xAE); //display off WriteCmd(0x20); //Set Memory Addressing Mode WriteCmd(0x10); //00,Horizontal Addressing Mode;01,Vertical Addressing Mode;10,Page Addressing Mode (RESET);11,Invalid WriteCmd(0xb0); //Set Page Start Address for Page Addressing Mode,0-7 WriteCmd(0xc8); //Set COM Output Scan Direction WriteCmd(0x00); //---set low column address WriteCmd(0x10); //---set high column address WriteCmd(0x40); //--set start line address WriteCmd(0x81); //--set contrast control register WriteCmd(0xff); //亮度调节 0x00~0xff WriteCmd(0xa1); //--set segment re-map 0 to 127 WriteCmd(0xa6); //--set normal display WriteCmd(0xa8); //--set multiplex ratio(1 to 64) WriteCmd(0x3F); // WriteCmd(0xa4); //0xa4,Output follows RAM content;0xa5,Output ignores RAM content WriteCmd(0xd3); //-set display offset WriteCmd(0x00); //-not offset WriteCmd(0xd5); //--set display clock divide ratio/oscillator frequency WriteCmd(0xf0); //--set divide ratio WriteCmd(0xd9); //--set pre-charge period WriteCmd(0x22); // WriteCmd(0xda); //--set com pins hardware configuration WriteCmd(0x12); WriteCmd(0xdb); //--set vcomh WriteCmd(0x20); //0x20,0.77xVcc WriteCmd(0x8d); //--set DC-DC enable WriteCmd(0x14); // WriteCmd(0xaf); //--turn on oled panel OLED_Fill(0);//全屏填充 } void OLED_SetPos(unsigned char x, unsigned char y) //设置起始点坐标 { x=x+2; WriteCmd(0xb0+y); WriteCmd(((x&0xf0)>>4)|0x10); WriteCmd((x&0x0f)/*|0x01*/); } void OLED_Fill(unsigned char fill_Data)//全屏填充 { unsigned char m,n; for(m=0;m<8;m++) { WriteCmd(0xb0+m); //page0-page1 WriteCmd(0x02); //low column start address WriteCmd(0x10); //high column start address for(n=0;n<128;n++) { WriteDat(fill_Data); } } } void OLED_CLS(void)//清屏 { OLED_Fill(0x00); } //-------------------------------------------------------------- // Prototype : void OLED_ON(void) // Calls : // Parameters : none // Description : 将OLED从休眠中唤醒 //-------------------------------------------------------------- void OLED_ON(void) { WriteCmd(0X8D); //设置电荷泵 WriteCmd(0X14); //开启电荷泵 WriteCmd(0XAF); //OLED唤醒 } //-------------------------------------------------------------- // Prototype : void OLED_OFF(void) // Calls : // Parameters : none // Description : 让OLED休眠 -- 休眠模式下,OLED功耗不到10uA //-------------------------------------------------------------- void OLED_OFF(void) { WriteCmd(0X8D); //设置电荷泵 WriteCmd(0X10); //关闭电荷泵 WriteCmd(0XAE); //OLED休眠 } //-------------------------------------------------------------- // Prototype : void OLED_ShowChar(unsigned char x, unsigned char y, unsigned char ch[], unsigned char TextSize) // Calls : // Parameters : x,y -- 起始点坐标(x:0~127, y:0~7); ch[] -- 要显示的字符串; TextSize -- 字符大小(1:6*8 ; 2:8*16) // Description : 显示codetab.h中的ASCII字符,有6*8和8*16可选择 //-------------------------------------------------------------- void OLED_ShowStr(unsigned char x, unsigned char y, unsigned char ch[], unsigned char TextSize) { unsigned char c = 0,i = 0,j = 0; switch(TextSize) { case 1: { while(ch[j] != '\0') { c = ch[j] - 32; if(x > 126) { x = 0; y++; } OLED_SetPos(x,y); for(i=0;i<6;i++) WriteDat(F6x8[c][i]); x += 6; j++; } }break; case 2: { while(ch[j] != '\0') { c = ch[j] - 32; if(x > 120) { x = 0; y++; } OLED_SetPos(x,y); for(i=0;i<8;i++) WriteDat(F8X16[c*16+i]); OLED_SetPos(x,y+1); for(i=0;i<8;i++) WriteDat(F8X16[c*16+i+8]); x += 8; j++; } }break; } } //-------------------------------------------------------------- // Prototype : void OLED_ShowCN(unsigned char x, unsigned char y, unsigned char N) // Calls : // Parameters : x,y -- 起始点坐标(x:0~127, y:0~7); N:汉字在codetab.h中的索引 // Description : 显示codetab.h中的汉字,16*16点阵 //-------------------------------------------------------------- void OLED_ShowCN(unsigned char x, unsigned char y, unsigned char N) { unsigned char wm=0; unsigned int adder=32*N; OLED_SetPos(x , y); for(wm = 0;wm < 16;wm++) { WriteDat(F16x16[adder]); adder += 1; } OLED_SetPos(x,y + 1); for(wm = 0;wm < 16;wm++) { WriteDat(F16x16[adder]); adder += 1; } } //-------------------------------------------------------------- // Prototype : void OLED_DrawBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char BMP[]); // Calls : // Parameters : x0,y0 -- 起始点坐标(x0:0~127, y0:0~7); x1,y1 -- 起点对角线(结束点)的坐标(x1:1~128,y1:1~8) // Description : 显示BMP位图 //-------------------------------------------------------------- void OLED_DrawBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char BMP[]) { unsigned int j=0; unsigned char x,y; if(y1%8==0) y = y1/8; else y = y1/8 + 1; for(y=y0;y<y1;y++) { OLED_SetPos(x0,y); for(x=x0;x<x1;x++) { WriteDat(BMP[j++]); } } } //三位数值显示 void OLED_ShowSHU(u8 x,u8 y,u8 shu,u8 TextSize) { u8 i[3]; i[0]=shu/100+0X30; i[1]=shu%100/10+0X30; i[2]=shu%10+0X30; if(shu/100==0) { i[0]=' '; if(shu%100/10==0) i[1]=' '; } OLED_ShowStr(x,y,i,TextSize); }
实物图片如下: