#include "oled.h"
//#include "stdlib.h"
#include "oledfont.h"  	 
#include "stm8l15x.h"//STM8L051/151等系列共用库函数
//#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 			   
void delay_ms(unsigned int ms)
{                         
	unsigned int a;
	while(ms)
	{
		a=1800;
		while(a--);
		ms--;
	}
	return;
}
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()
{


	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;
		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(u8 dat,u8 cmd)
{
	if(cmd)
			{

   Write_IIC_Data(dat);
   
		}
	else {
   Write_IIC_Command(dat);
		
	}


}
	void OLED_Set_Pos(unsigned char x, unsigned char y) 
{ 
	OLED_WR_Byte(0xb0+y,OLED_CMD);
	OLED_WR_Byte((((x+2)&0xf0)>>4)|0x10,OLED_CMD);
	OLED_WR_Byte(((x+2)&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)  
{  
	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 (0x02,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
}


//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(u8 x,u8 y,u8 chr)
{      	
	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(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+1);
				for(i=0;i<6;i++)
				OLED_WR_Byte(F6x8[c][i],OLED_DATA);
				
			}
}
//m^n函数
u32 oled_pow(u8 m,u8 n)
{
	u32 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(u8 x,u8 y,u32 num,u8 len,u8 size2)
{         	
	u8 t,temp;
	u8 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,' ');
				continue;
			}else enshow=1; 
		 	 
		}
	 	OLED_ShowChar(x+(size2/2)*t,y,temp+'0'); 
	}
} 
//显示一个字符号串
void OLED_ShowString(u8 x,u8 y,u8 *chr)
{
	unsigned char j=0;
	while (chr[j]!='\0')
	{		OLED_ShowChar(x,y,chr[j]);
			x+=8;
		if(x>120){x=0;y+=2;}
			j++;
	}
}
//显示汉字
void OLED_ShowCHinese(u8 x,u8 y,u8 no)
{      			    
	u8 t,adder=0;
	OLED_Set_Pos(x,y);	
    for(t=0;t<16;t++)
		{
				OLED_WR_Byte(Hzk[2*no][t],OLED_DATA);
				adder+=1;
     }	
		OLED_Set_Pos(x,y+1);	
    for(t=0;t<16;t++)
			{	
				OLED_WR_Byte(Hzk[2*no+1][t],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_Init(OLED_SCLK_PORT, (GPIO_Pin_TypeDef)OLED_SCLK_PINS, GPIO_Mode_Out_PP_High_Fast);
  GPIO_Init(OLED_SDIN_PORT, (GPIO_Pin_TypeDef)OLED_SDIN_PINS, GPIO_Mode_Out_PP_High_Fast);
  GPIO_Init(OLED_RST_PORT, (GPIO_Pin_TypeDef)OLED_RST_PINS, GPIO_Mode_Out_PP_High_Fast);

  GPIO_Init(LED_PORT, (GPIO_Pin_TypeDef)LED_PINS, GPIO_Mode_Out_PP_High_Fast);
   
 
  OLED_RST_Set();
	delay_ms(100);
	OLED_RST_Clr();
	delay_ms(100);
	OLED_RST_Set(); 
	

	OLED_WR_Byte(0xAE,OLED_CMD);//--turn  oled panel
	OLED_WR_Byte(0x02,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);//--turn on oled panel
	
	OLED_WR_Byte(0xAF,OLED_CMD); /*display ON*/ 
	OLED_Clear();
	OLED_Set_Pos(0,0); 	
}