text: #include "oled.h"
  #include "stdlib.h"
  #include "oledfont.h"
  #include "delay.h"
  
  //OLED的显存
  //存放格式如下.
  //[0]0 1 2 3 ... 127
  //[1]0 1 2 3 ... 127
  //[2]0 1 2 3 ... 127
  //[3]0 1 2 3 ... 127
  //[4]0 1 2 3 ... 127
  //[5]0 1 2 3 ... 127
  //[6]0 1 2 3 ... 127
  //[7]0 1 2 3 ... 127
  
  
  
  uint8_t OLED_GRAM[128][8];
  
  /**********************************************
  //IIC Start
  **********************************************/
  void IIC_Start()
  {
  
      OLED_SCLK_Set() ;
      OLED_SDIN_Set();
      OLED_SDIN_Clr();
      OLED_SCLK_Clr();
  }
  
  /**********************************************
  //IIC Stop
  **********************************************/
  void IIC_Stop()
  {
      OLED_SCLK_Set() ;
  //	OLED_SCLK_Clr();
      OLED_SDIN_Clr();
      OLED_SDIN_Set();
  }
  
  void IIC_Wait_Ack()
  {
      /*	while(1)
      	{
      		if(!OLED_SDA)				//判断是否接收到OLED 应答信号
      		{
      			//GPIOB->CRH &= 0XFFF0FFFF;	//设置PB12为通用推免输出模式
      			//GPIOB->CRH |= 0x00030000;
      			return;
      		}
      	}
      */
      OLED_SCLK_Set() ;
      OLED_SCLK_Clr();
  }
  /**********************************************
  // IIC Write byte
  **********************************************/
  void Write_IIC_Byte(unsigned char IIC_Byte)
  {
      unsigned char i;
      unsigned char m,da;
      da=IIC_Byte;
      OLED_SCLK_Clr();
      for(i=0; i<8; i++)
      {
          m=da;
          //	OLED_SCLK_Clr();
          m=m&0x80;
          if(m==0x80)
          {
              OLED_SDIN_Set();
          }
          else OLED_SDIN_Clr();
          da=da<<1;
          OLED_SCLK_Set();
          OLED_SCLK_Clr();
      }
  }
  /**********************************************
  // IIC Write Command
  **********************************************/
  void Write_IIC_Command(unsigned char IIC_Command)
  {
      IIC_Start();
      Write_IIC_Byte(0x78);            //Slave address,SA0=0
      IIC_Wait_Ack();
      Write_IIC_Byte(0x00);			//write command
      IIC_Wait_Ack();
      Write_IIC_Byte(IIC_Command);
      IIC_Wait_Ack();
      IIC_Stop();
  }
  /**********************************************
  // IIC Write Data
  **********************************************/
  void Write_IIC_Data(unsigned char IIC_Data)
  {
      IIC_Start();
      Write_IIC_Byte(0x78);			//D/C#=0; R/W#=0
      IIC_Wait_Ack();
      Write_IIC_Byte(0x40);			//write data
      IIC_Wait_Ack();
      Write_IIC_Byte(IIC_Data);
      IIC_Wait_Ack();
      IIC_Stop();
  }
  void OLED_WR_Byte(unsigned dat,unsigned cmd)
  {
      if(cmd)
      {
          Write_IIC_Data(dat);
      }
      else {
          Write_IIC_Command(dat);
      }
  }
  
  /********************************************
  // fill_Picture
  ********************************************/
  void fill_picture(unsigned char fill_Data)
  {
      unsigned char m,n;
      for(m=0; m<8; m++)
      {
          OLED_WR_Byte(0xb0+m,0);		//page0-page1
          OLED_WR_Byte(0x00,0);		//low column start address
          OLED_WR_Byte(0x10,0);		//high column start address
          for(n=0; n<128; n++)
          {
              OLED_WR_Byte(fill_Data,1);
          }
      }
  }
  
  //坐标设置
  void OLED_Set_Pos(unsigned char x, unsigned char y)
  {   OLED_WR_Byte(0xb0+y,OLED_CMD);
      OLED_WR_Byte(((x&0xf0)>>4)|0x10,OLED_CMD);
      OLED_WR_Byte((x&0x0f),OLED_CMD);
  }
  //开启OLED显示
  void OLED_Display_On(void)
  {
      OLED_WR_Byte(0X8D,OLED_CMD);  //SET DCDC命令
      OLED_WR_Byte(0X14,OLED_CMD);  //DCDC ON
      OLED_WR_Byte(0XAF,OLED_CMD);  //DISPLAY ON
  }
  //关闭OLED显示
  void OLED_Display_Off(void)
  {
      OLED_WR_Byte(0X8D,OLED_CMD);  //SET DCDC命令
      OLED_WR_Byte(0X10,OLED_CMD);  //DCDC OFF
      OLED_WR_Byte(0XAE,OLED_CMD);  //DISPLAY OFF
  }
  //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)
  {
      uint8_t 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(0,OLED_DATA);
      } //更新显示
  }
  void OLED_On(void)
  {
      uint8_t 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(1,OLED_DATA);
      } //更新显示
  }
  //在指定位置显示一个字符,包括部分字符
  //x:0~127
  //y:0~63
  //mode:0,反白显示;1,正常显示
  //size:选择字体 16/12
  void OLED_ShowChar(uint8_t x,uint8_t y,uint8_t chr,uint8_t Char_Size)
  {
      unsigned char c=0,i=0;
      c=chr-' ';//得到偏移后的值
      if(x>Max_Column-1) {
          x=0;
          y=y+2;
      }
      if(Char_Size ==16)
      {
          OLED_Set_Pos(x,y);
          for(i=0; i<8; i++)
              OLED_WR_Byte(F8X16[c*16+i],OLED_DATA);
          OLED_Set_Pos(x,y+1);
          for(i=0; i<8; i++)
              OLED_WR_Byte(F8X16[c*16+i+8],OLED_DATA);
      }
      else {
  //        OLED_Set_Pos(x,y);
  //        for(i=0; i<6; i++)
  //            OLED_WR_Byte(F6x8[c][i],OLED_DATA);
  
      }
  }
  //m^n函数
  uint32_t oled_pow(uint8_t m,uint8_t n)
  {
      uint32_t result=1;
      while(n--)result*=m;
      return result;
  }
  //显示2个数字
  //x,y :起点坐标
  //len :数字的位数
  //size:字体大小
  //mode:模式	0,填充模式;1,叠加模式
  //num:数值(0~4294967295);
  void OLED_ShowNum(uint8_t x,uint8_t y,uint32_t num,uint8_t len,uint8_t size2)
  {
      uint8_t t,temp;
      uint8_t enshow=0;
      for(t=0; t<len; t++)
      {
          temp=(num/oled_pow(10,len-t-1))%10;
          if(enshow==0&&t<(len-1))
          {
              if(temp==0)
              {
                  OLED_ShowChar(x+(size2/2)*t,y,' ',size2);
                  continue;
              } else enshow=1;
          }
          OLED_ShowChar(x+(size2/2)*t,y,temp+'0',size2);
      }
  }
  //显示一个字符号串
  void OLED_ShowString(uint8_t x,uint8_t y,uint8_t *chr,uint8_t Char_Size)
  {
      unsigned char j=0;
      while (chr[j]!='\0')
      {   OLED_ShowChar(x,y,chr[j],Char_Size);
          x+=8;
          if(x>120) {
              x=0;
              y+=2;
          }
          j++;
      }
  }
  //显示汉字
  void OLED_ShowCHinese(uint8_t x,uint8_t y,uint8_t no)
  {
      unsigned char wm=0;
      unsigned int  adder=32*no;
      OLED_Set_Pos(x,y);
      for(wm = 0; wm < 16; wm++)
      {
          OLED_WR_Byte(F16x16[adder],OLED_DATA);
          adder += 1;
      }
      OLED_Set_Pos(x,y+1);
      for(wm = 0; wm < 16; wm++)
      {
          OLED_WR_Byte(F16x16[adder],OLED_DATA);
          adder += 1;
      }
  }
  ///***********功能描述：显示显示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(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_Set_Pos(x0,y);
  //        for(x=x0; x<x1; x++)
  //        {
  //            OLED_WR_Byte(BMP[j++],OLED_DATA);
  //        }
  //    }
  //}
  
  //初始化SSD1306
  void OLED_Init(void)
  {
      GPIO_InitTypeDef  GPIO_InitStructure;
      RCC_APB2PeriphClockCmd(OLEDCLK, ENABLE); 
      GPIO_InitStructure.GPIO_Pin = DATA|SCLK;				 
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; 		 
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;		 
      GPIO_Init(OLED, &GPIO_InitStructure);
  
      GPIO_SetBits(OLED,DATA|SCLK);
      /*
      RCC->APB2ENR |= 1 << 2;
      GPIOA->CRL &= 0xFFFFFF00;
      GPIOA->CRL |= 0x33;
      */
  
      delay_ms(200);
  
      OLED_WR_Byte(0xAE,OLED_CMD);//--display off 关闭显示
      OLED_WR_Byte(0x00,OLED_CMD);//---set low column address 设置低列地址
      OLED_WR_Byte(0x10,OLED_CMD);//---set high column address
      OLED_WR_Byte(0x40,OLED_CMD);//--set start line address
      OLED_WR_Byte(0xB0,OLED_CMD);//--set page address
      OLED_WR_Byte(0x81,OLED_CMD); // contract control
      OLED_WR_Byte(0xFF,OLED_CMD);//--128
      OLED_WR_Byte(0xA1,OLED_CMD);//set segment remap
      OLED_WR_Byte(0xA6,OLED_CMD);//--normal / reverse
      OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)
      OLED_WR_Byte(0x3F,OLED_CMD);//--1/32 duty
      OLED_WR_Byte(0xC8,OLED_CMD);//Com scan direction
      OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset
      OLED_WR_Byte(0x00,OLED_CMD);//
  
      OLED_WR_Byte(0xD5,OLED_CMD);//set osc division
      OLED_WR_Byte(0x80,OLED_CMD);//
  
      OLED_WR_Byte(0xD8,OLED_CMD);//set area color mode off
      OLED_WR_Byte(0x05,OLED_CMD);//
  
      OLED_WR_Byte(0xD9,OLED_CMD);//Set Pre-Charge Period
      OLED_WR_Byte(0xF1,OLED_CMD);//
  
      OLED_WR_Byte(0xDA,OLED_CMD);//set com pin configuartion
      OLED_WR_Byte(0x12,OLED_CMD);//
  
      OLED_WR_Byte(0xDB,OLED_CMD);//set Vcomh
      OLED_WR_Byte(0x30,OLED_CMD);//
  
      OLED_WR_Byte(0x8D,OLED_CMD);//set charge pump enable
      OLED_WR_Byte(0x14,OLED_CMD);//
  
      OLED_WR_Byte(0xAF,OLED_CMD);//--turn on oled panel
  }
  
  
  
  