//**********************************************//
//	Model：AiP31068 SPI/IIC Controller 			//
//												//
//	功能介绍：36*4段输出、I2C总线、偏置可选		//
//	超低功耗、内置闪烁功能						//
//**********************************************//
//	51 Library（STC15W4K32S4）		    //
//	System Cock: 11.0592MHZ						//
//**********************************************//

#include <STC15F2K60S2.H>

#define SDA		P20					//I2C Data Line
#define	SCL		P21					//I2C Clock Line

//********************************************//
//	实际使用时仅更改以上头文件和端口定义即可	//
//********************************************//

//typedef unsigned char uchar;
//typedef unsigned int	uint;

uchar code tab1[]="Welcome to use!";
uchar code tab2[]=" www.surenoo.com";
uchar code zimu[][8]={{0x00,0xff,0x04,0x04,0xff,0x04,0x04,0xff},		//王
					  {0x00,0x00,0xff,0x15,0xff,0x15,0xff,0x00},		//田
					  {0x00,0x00,0x00,0x00,0xff,0x00,0x00,0x00},		//一
					  {0x00,0x00,0x0e,0x00,0x00,0xff,0x00,0x00},		//二
					  {0x00,0x00,0x0e,0x00,0x0e,0x00,0xff,0x00},		//三
					  {0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55},
					  {0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55},
					  {0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55}};
void delay(void);
void delay_ms(uint ms);
void write_dat(uchar dat);
void write_ndat(uchar *dat, uchar length);
void write_cmd(uchar cmd);	
void write_CGRAM(void);											
void lcd_init(void);
void display(void);
//********************************************//
//****************主函数**********************//
//********************************************//
void main(void)
{
	P2M0 = 0X00;	P2M1 = 0X00;		//P2端口配置为准双向口
	lcd_init();
	write_CGRAM();
	while(1)
	{
		display();
	}
}
//********************************************//
//***************子函数***********************//
//********************************************//
void delay(void)					//几us的延时
{
	uchar i = 2;
	while(i--);
}
void delay_ms(uint ms)			//大约ms级的延时
{
	uint i,j;
	for(j=0;j<ms;j++)
		for(i=0;i<1000;i++);
}
void i2c_start(void)			//开始信号
{								//SCL为高时，SDA下降沿
	SDA = 1;
	SCL = 1;
	delay();
	SDA = 0;
	delay();	
}
void i2c_stop(void)				//停止信号
{								//SCL为高时，SDA上升沿
	SDA = 0;
	SCL = 1;
	delay();
	SDA = 1;
	delay();
}
void ack(void)					//ACK应答
{								//第九个时钟，应答检测
	SCL = 0;
	delay();
	SDA = 1;
	SCL = 1;
	while(SDA);
	delay();
	SCL = 0;
	delay();
}
void i2c_write(uchar dat)		//写8bit数据
{
	uchar i;
	for(i = 0; i < 8; i++)
	{
		SCL = 0;
		SDA = dat & 0x80;
		delay();
		SCL = 1;
		dat <<= 1;
		delay();	 
	} 
	ack();
}
uchar i2c_read(void)			//读8bit数据
{
	uchar temp,i;
	for (i = 0;i < 8;i++)
	{
		SCL = 1;	
		delay();
		temp <<= 1;
		temp |= SDA;
		SCL = 0; 
		delay();
	}
	SDA = 1;
	SCL = 1;
	delay();
	SCL = 0;
	delay();
	return temp;
}
void write_dat(uchar dat)
{
	write_ndat(&dat,1);	
}
void write_ndat(uchar *dat, uchar length)	//写数据
{	
	uchar i;
	i2c_start();							//开始
	i2c_write(0x7c);						//写从机地址
	for(i=0;i<length-1;i++)					//写length长度地址
	{
		i2c_write(0xc0);					//写数据指令
		i2c_write(dat[i]);
	}
	i2c_write(0x40);						//传输数据停止标志位
	i2c_write(dat[i]);					
	i2c_stop();								//停止
}
void write_cmd(uchar cmd)					//写指令
{	
	i2c_start();							//开始
	i2c_write(0x7c);						//从机地址
	i2c_write(0x80);						//写指令
	i2c_write(cmd);
	i2c_stop();								//停止
}
void write_CGRAM(void)						//造字
{	
	uchar i;
	write_cmd(0x40);						//CGRAM地址
	for(i=0;i<8;i++)
		write_ndat(&zimu[i-1][8],8);
}
void lcd_init(void)						//初始化
{
	write_cmd(0X38);					//2行模式，5*8点阵
	write_cmd(0x0c);					//开显示
	write_cmd(0x01);					//清显示
	delay_ms(2);		
	write_cmd(0x06); 					//光标设置
}
void display(void)
{
	uchar i;
	write_cmd(0x80);					//第一行
	write_ndat(tab1,16);				//显示数据
	write_cmd(0xc0);					//第二行
	write_ndat(tab2,16);				//显示数据
	delay_ms(1000);
	write_cmd(0x01);					//清显示
	delay_ms(2);		
	for(i=0;i<8;i++)					//调用CGRAM
	{
		write_cmd(0x80+i);				
		write_dat(0x00+i);			
		write_cmd(0xc0+i);				
		write_dat(0x00+i);			
	}
	delay_ms(1000);
}