#include<util/delay.h>
#include<avr/io.h>
#include"defines.h"
void control_write(unsigned char control)
{
    GLCD_DATA_DDR = 0XFF;
    GLCD_CTRL_PORT &= ~(1<<GLCD_CTRL_E);
    GLCD_CTRL_PORT &= ~(1<<GLCD_CTRL_RW);
    GLCD_CTRL_PORT |= (1<<GLCD_CTRL_CS0);
    GLCD_CTRL_PORT &= ~(1<<GLCD_CTRL_RS);
    asm volatile ("nop"); asm volatile ("nop");
    asm volatile ("nop"); asm volatile ("nop");
    GLCD_CTRL_PORT |= (1<<GLCD_CTRL_E);
    asm volatile ("nop"); asm volatile ("nop");
    GLCD_DATA_PORT = 0x3e;
    GLCD_CTRL_PORT |= (1<<GLCD_CTRL_RW);
    asm volatile ("nop"); asm volatile ("nop");
}
unsigned char control_read()
{
    unsigned char control;
    GLCD_DATA_DDR = 0X00;
    GLCD_CTRL_PORT &= ~(1<<GLCD_CTRL_E);
    GLCD_CTRL_PORT |= (1<<GLCD_CTRL_RW);
    GLCD_CTRL_PORT |= (1<<GLCD_CTRL_CS0);
    GLCD_CTRL_PORT &= ~(1<<GLCD_CTRL_RS);
    asm volatile ("nop"); asm volatile ("nop");
    asm volatile ("nop"); asm volatile ("nop");
    GLCD_CTRL_PORT |= (1<<GLCD_CTRL_E);
    asm volatile ("nop"); asm volatile ("nop");
    control = GLCD_DATA_PIN;
    GLCD_CTRL_PORT &= ~(1<<GLCD_CTRL_RW);
    asm volatile ("nop"); asm volatile ("nop");
    return control;
}

int main(void){
    unsigned char control;
    _delay_ms(100);
    DDRB = 0xFF;
    GLCD_CTRL_DDR = 0XFF;
    GLCD_CTRL_PORT &= ~(1<<GLCD_CTRL_RESET);
    while(1){
        //CONTROL WRITE
        control_write(GLCD_ON_CTRL);
        //CONTROL READ
        control = control_read();
        PORTB |= (1<<1);
        if(control & GLCD_STATUS_BUSY)
            PORTB |= (1<<0);
    }
    return 0;
}