#include <io8515v.h>
#include <macros.h>
#include <162-1302.h>
void delay_ms(unsigned char n)
	{
	unsigned char a, b;
	for (a = 1; a<n; a++)
		for (b = 1; b; b++)
			;
	}
void delay_us(unsigned int n)
	{
	unsigned char  b;
		for (b = 1; b<n; b++)
			;
	}
	
void LCD_wait(void)   	 	    //等待LCD空閑
{
LCD_DATA_PORT&=~BIT(7);
PORTB&=~BIT(0);
PORTB|=BIT(1);
PORTB|=BIT(2);
while(!(LCD_DATA_PIN &0x80)==0);
LCD_DATA_DDR|=0xFF;
PORTB&=~BIT(2);
}

void command_enable()  		   	//寫指令使能
{ 
PORTB&=~(BIT(0)|BIT(1));
PORTB|=BIT(2);
asm("nop");
PORTB&=~BIT(2);
}
void data_enable()				//寫數據使能
{
PORTB|=BIT(0);
PORTB&=~BIT(1);
PORTB|=BIT(2);
asm("nop");
PORTB&=~BIT(2);
}

/*設置LCD顯示的起始位置輸入參數：x、y
顯示字符串的位置，X:0-15，Y:0-1
LCD第一行顯示寄存器地址：0X80-0X8F
LCD第一行顯示寄存器地址：0XC0-0XCF*/
void LCD_set_xy( unsigned char x, unsigned char y )
{
unsigned char address;
if (y==0)
  address=0x80+x;
 else
 address=0xC0+x;
LCD_DATA_PORT=address;     	   //輸入開始顯示地址
command_enable();
delay_ms(10);
}
//寫一個字符
void LCD_write_char(unsigned char data)
{
LCD_DATA_PORT=data;     		
data_enable();
delay_ms(10);
}
//寫一字符串
void LCD_write_string(unsigned char x, unsigned char y,unsigned char *s)
{
LCD_set_xy(x,y);
while(*s)
	{
	LCD_write_char(*s);
	s++;
	}

}

void init_lcd()     			//初始化
{
delay_ms(180);						//等待30ms以上
LCD_DATA_PORT=0x38;     		//８位２行５×７點陣
command_enable();
delay_us(100);					//等待39us以上
LCD_DATA_PORT=0x0C;     		//顯示器開、光標開、閃爍關
command_enable();
delay_us(100);					//等待39us以上
LCD_DATA_PORT=0x01;     		//清屏
command_enable();
delay_ms(10);						//等待1.53ms以上
LCD_DATA_PORT=0x06;     		//輸入方式
command_enable();
delay_ms(180); 					//初始化完畢
}