小熊派BearPi-Pico H2821 华为星闪SLE通信OLED显示数据

1、功能介绍

• BearPi-Pico H2821 星闪开发板使用OLED显示数据
• 两块开发板实现SLE数据传输测试，A开发板通过串口接收数据，然后通过SLE传输给B开发板，B开发板通过串口将接收到的数据打印出来，并使用OLED显示数据

2、演示视频

• https://www.bilibili.com/video/BV1Bx4y1b7rE

3、OLED代码

• oled使用软件IIC通信
• 

3.1、初始化OLED

	OLED_WR_Byte(0xAE,OLED_CMD);//--turn off oled panel
	OLED_WR_Byte(0x00,OLED_CMD);//---set low column address
	OLED_WR_Byte(0x10,OLED_CMD);//---set high column address
	OLED_WR_Byte(0x40,OLED_CMD);//--set start line address  Set Mapping RAM Display Start Line (0x00~0x3F)
	OLED_WR_Byte(0x81,OLED_CMD);//--set contrast control register
	OLED_WR_Byte(0xCF,OLED_CMD);// Set SEG Output Current Brightness
	OLED_WR_Byte(0xA1,OLED_CMD);//--Set SEG/Column Mapping     0xa0左右反置 0xa1正常
	OLED_WR_Byte(0xC8,OLED_CMD);//Set COM/Row Scan Direction   0xc0上下反置 0xc8正常
	OLED_WR_Byte(0xA6,OLED_CMD);//--set normal display
	OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)
	OLED_WR_Byte(0x3f,OLED_CMD);//--1/64 duty
	OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset	Shift Mapping RAM Counter (0x00~0x3F)
	OLED_WR_Byte(0x00,OLED_CMD);//-not offset
	OLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequency
	OLED_WR_Byte(0x80,OLED_CMD);//--set divide ratio, Set Clock as 100 Frames/Sec
	OLED_WR_Byte(0xD9,OLED_CMD);//--set pre-charge period
	OLED_WR_Byte(0xF1,OLED_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
	OLED_WR_Byte(0xDA,OLED_CMD);//--set com pins hardware configuration
	OLED_WR_Byte(0x12,OLED_CMD);
	OLED_WR_Byte(0xDB,OLED_CMD);//--set vcomh
	OLED_WR_Byte(0x40,OLED_CMD);//Set VCOM Deselect Level
	OLED_WR_Byte(0x20,OLED_CMD);//-Set Page Addressing Mode (0x00/0x01/0x02)
	OLED_WR_Byte(0x02,OLED_CMD);//
	OLED_WR_Byte(0x8D,OLED_CMD);//--set Charge Pump enable/disable
	OLED_WR_Byte(0x14,OLED_CMD);//--set(0x10) disable
	OLED_WR_Byte(0xA4,OLED_CMD);// Disable Entire Display On (0xa4/0xa5)
	OLED_WR_Byte(0xA6,OLED_CMD);// Disable Inverse Display On (0xa6/a7) 
	OLED_WR_Byte(0xAF,OLED_CMD);
	OLED_Clear();

3.2、显示字符

void OLED_ShowChar(u8 x,u8 y,u8 chr,u8 size1)
{
	u8 i,m,temp,size2,chr1;
	u8 y0=y;
	size2=(size1/8+((size1%8)?1:0))*(size1/2);  //得到字体一个字符对应点阵集所占的字节数
	chr1=chr-' ';  //计算偏移后的值
	for(i=0;i<size2;i++)
	{
		if(size1==12)
        {temp=asc2_1206[chr1][i];} //调用1206字体
		else if(size1==16)
        {temp=asc2_1608[chr1][i];} //调用1608字体
		else if(size1==24)
        {temp=asc2_2412[chr1][i];} //调用2412字体
		else return;
    for(m=0;m<8;m++)           //写入数据
    {
      if(temp&0x80)OLED_DrawPoint(x,y);
      else OLED_ClearPoint(x,y);
      temp<<=1;
      y++;
      if((y-y0)==size1)
      {
        y=y0;
        x++;
        break;
      }
    }
  }
}

3.3、IIC控制代码

//起始信号
void I2C_Start(void)
{
	OLED_SDIN_Set();
	OLED_SCLK_Set();
	OLED_SDIN_Clr();
	OLED_SCLK_Clr();
}

//结束信号
void I2C_Stop(void)
{
	OLED_SCLK_Set();
	OLED_SDIN_Clr();
	OLED_SDIN_Set();
}

//等待信号响应
void I2C_WaitAck(void) //测数据信号的电平
{
	OLED_SCLK_Set();
	OLED_SCLK_Clr();
}

//写入一个字节
void Send_Byte(u8 dat)
{
	u8 i;
	for(i=0;i<8;i++)
	{
		OLED_SCLK_Clr();//将时钟信号设置为低电平
		if(dat&0x80)//将dat的8位从最高位依次写入
		{
			OLED_SDIN_Set();
    }
		else
		{
			OLED_SDIN_Clr();
    }
		OLED_SCLK_Set();//将时钟信号设置为高电平
		OLED_SCLK_Clr();//将时钟信号设置为低电平
		dat<<=1;
  }
}

代码下载

• https://download.csdn.net/download/m0_51061483/89436185