#include "LCD3310.h"

void delay()
{
    char i;
    for(i=0;i<100;i++);
}

void LCD_WriteByte(char dis_data,char dc)
{
    char i,wbuf,shift=0x80;
    if(dc == 1)
        LCDBUS |= DC;
    else
        LCDBUS &= ~DC;   

    for(i=0;i<8;i++)
    {
        wbuf = (dis_data & (shift >> i));
        if(wbuf == 0)
            LCDBUS &= ~SDIN;
        else
            LCDBUS |= SDIN;

        LCDBUS &= ~SCLK;
        //delay();
        LCDBUS |= SCLK;
     }
}

void LCD_Init()
{
    P4DIR = 0xff;
    LCDBUS = SCLK + SDIN + DC + RST;
    LCD_WriteByte(0x21,0);
    LCD_WriteByte(0x90,0);
    LCD_WriteByte(0x20,0);
    LCD_WriteByte(0x0c,0);
}

void LCD_SetAddr(char addr_x,char addr_y)
{
    addr_x += 0x80;
    addr_y += 0x40;
    LCD_WriteByte(0x20,0);
    LCD_WriteByte(addr_x,0);
    LCD_WriteByte(addr_y,0);
}