//////////////////////////////////////////////////////////////////////////////////	 
//本程序只供学习使用，未经作者许可，不得用于其它任何用途

//********************************************************************************
#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 			   
unsigned char  OLED_GRAM[128][8];	 

//更新显存到LCD		 
void OLED_Refresh_Gram(void)
{
	unsigned char  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(OLED_GRAM[n][i],OLED_DATA); 
	}   
}

//向SSD1306写入一个字节。
//dat:要写入的数据/命令
//cmd:数据/命令标志 0,表示命令;1,表示数据;
void OLED_WR_Byte(unsigned char  dat,unsigned char  cmd)
{	
	//unsigned char  i;			  
	if(cmd)
	  OLED_RS_Set();
	else 
	  OLED_RS_Clr();	//命令模式或者数据模式	  
	  OLED_CS_Clr();//片选
	
	//添加硬件读写SPI函数
	
	SPI2_ReadWriteByte(dat);
	 		  
	OLED_CS_Set();
	OLED_RS_Set();   	  
} 
	  	  
//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)  
{  
	unsigned char  i,n;  
	for(i=0;i<8;i++)for(n=0;n<128;n++)OLED_GRAM[n][i]=0X00;  
	OLED_Refresh_Gram();//更新显示
}
//设置坐标点
void LCD_Set_Pos(unsigned char  x, unsigned char  y) 
{ 
		OLED_WR_Byte(0xb0+(7-y/8),OLED_CMD);
		OLED_WR_Byte(((x&0xf0)>>4)|0x10,OLED_CMD);
		OLED_WR_Byte((x&0x0f),OLED_CMD); 
} 
//画点 
//x:0~127
//y:0~63
//t:1 填充 0,清空				   
void OLED_DrawPoint(unsigned char  x,unsigned char  y,unsigned char  t)
{
	unsigned char  pos,bx,temp=0;
		LCD_Set_Pos(x, y);  
		if(x>127||y>64)return;//超出范围了.
		pos=7-y/8;
		bx=y%8;
		temp=1<<(7-bx);
		if(t)OLED_GRAM[x][pos]|=temp;
		else OLED_GRAM[x][pos]&=~temp;	
	  
     //设置显示位置—列高地址   
	  OLED_WR_Byte(OLED_GRAM[x][pos],OLED_DATA); 
	
  //	OLED_WR_Byte(OLED_GRAM[x][pos],OLED_DATA); 
	  

}
//x1,y1,x2,y2 填充区域的对角坐标
//确保x1<=x2;y1<=y2 0<=x1<=127 0<=y1<=63	 	 
//dot:0,清空;1,填充	  
void OLED_Fill(unsigned char  x1,unsigned char  y1,unsigned char  x2,unsigned char  y2,unsigned char  dot)  
{  
	unsigned char  x,y;  
	for(x=x1;x<=x2;x++)
	{
		for(y=y1;y<=y2;y++)OLED_DrawPoint(x,y,dot);
	}													    
	OLED_Refresh_Gram();//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(unsigned char  x,unsigned char  y,unsigned char  chr,unsigned char  size,unsigned char  mode)
{      			    
	unsigned char  temp,t,t1;
	unsigned char  y0=y;
	chr=chr-' ';//得到偏移后的值				   
    for(t=0;t<size;t++)
    {   
		if(size==12)temp=oled_asc2_1206[chr][t];  //调用1206字体
		else temp=oled_asc2_1608[chr][t];		 //调用1608字体 	                          
        for(t1=0;t1<8;t1++)
		{
			if(temp&0x80)OLED_DrawPoint(x,y,mode);
			else OLED_DrawPoint(x,y,!mode);
			temp<<=1;
			y++;
			if((y-y0)==size)
			{
				y=y0;
				x++;
				break;
			}
		}  	 
    }          
}
void OLED_ShowCHinese(unsigned char  x,unsigned char  y,unsigned char  no)//显示中文
{      			    
	unsigned char  temp,t,t1;
	unsigned char  y0=y;
	unsigned char  mode=1;
	//chr=chr-' ';//得到偏移后的值				   
    for(t=0;t<32;t++)
    {   
	
			temp= CHINESE[no][t];		 //调用1608字体 	                          
        for(t1=0;t1<8;t1++)
		{
			if(temp&0x80)OLED_DrawPoint(x,y,mode);
			else OLED_DrawPoint(x,y,!mode);
			temp<<=1;
			y++;
			if((y-y0)==16)
			{
				y=y0;
				x++;
				break;
			}
		}  	 
      }          
}  
//m^n函数
unsigned int oled_pow(unsigned char  m,unsigned char  n)
{
	unsigned int 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(unsigned char  x,unsigned char  y,unsigned int num,unsigned char  len,unsigned char  size)
{         	
	unsigned char  t,temp;
	unsigned char  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+(size/2)*t,y,' ',size,1);
				continue;
			}else enshow=1; 
		 	 
		}
	 	OLED_ShowChar(x+(size/2)*t,y,temp+'0',size,1); 
	}
} 
//显示字符串
//x,y:起点坐标  
//*p:字符串起始地址
//用16字体
void OLED_ShowString(unsigned char  x,unsigned char  y,const unsigned char  *p)
{
#define MAX_CHAR_POSX 127
#define MAX_CHAR_POSY 63         
    while(*p!='\0')
    {       
        if(x>MAX_CHAR_POSX){x=0;y+=16;}
        if(y>MAX_CHAR_POSY){y=x=0;OLED_Clear();}
        OLED_ShowChar(x,y,*p,16,1);	 
        x+=8;
        p++;
    }  
}	   
//初始化SSD1306					    
void OLED_Init(void)
{ 	
 
 	GPIO_InitTypeDef  GPIO_InitStructure;
 	
 	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);	 //使能B端口时钟

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;	 //A0脚接到OLED的RST脚 
 	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; 		 //推挽输出
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//速度50MHz
 	GPIO_Init(GPIOB, &GPIO_InitStructure);	  //A0脚接到OLED的RST脚 

  							  
//	OLED_RST_Clr();
//	delay_ms(100);
//	OLED_RST_Set(); 
					  
	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();
}  





























