#include <avr/io.h>
#include <compat/deprecated.h>
#define F_CPU 16000000u
#include "util/delay.h"
#define data_bus PORTC
#define set_data_bus_output (DDRC = 0xff)
#define set_data_bus_input (DDRC = 0x00, PORTC = 0x00)
#define WE_high (sbi(PORTD, 3))
#define WE_low (cbi(PORTD, 3))
#define OE_high (sbi(PORTD, 4))
#define OE_low (cbi(PORTD, 4))
#define CE_high (sbi(PORTD, 5))
#define CE_low (cbi(PORTD, 5))
#define DS1_high (sbi(PORTD, 0))
#define DS1_low (cbi(PORTD, 0))
#define STCP1_high (sbi(PORTD, 1))
#define STCP1_low (cbi(PORTD, 1))
#define SHCP1_high (sbi(PORTD, 2))
#define SHCP1_low (cbi(PORTD, 2))
#define DS2_high (sbi(PORTD, 6))
#define DS2_low (cbi(PORTD, 6))
#define STCP2_high (sbi(PORTD, 7))
#define STCP2_low (cbi(PORTD, 7))
#define SHCP2_high (sbi(PORTA, 7))
#define SHCP2_low (cbi(PORTA, 7))

void initialise_74HC595()
{
	sbi(DDRD, 0);
	sbi(DDRD, 1);
	sbi(DDRD, 2);
}

void write_74HC595(uint8_t data)
{
	STCP1_low;
	for(uint8_t i = 0; i < 8; i++)
	{
		if(data & 0b10000000)
		{
			DS1_high;
		}
		else
		{
			DS1_low;
		}
		SHCP1_high;
		SHCP1_low;
		data = data<<1;
	}
	STCP1_high;
}

void initialise_74HC595_2()
{
	sbi(DDRD, 6);
	sbi(DDRD, 7);
	sbi(DDRA, 7);
}

void write_74HC595_2(uint8_t data)
{
	STCP2_low;
	for(uint8_t i = 0; i < 8; i++)
	{
		if(data & 0b10000000)
		{
			DS2_high;
		}
		else
		{
			DS2_low;
		}
		SHCP2_high;
		SHCP2_low;
		data = data<<1;
	}
	STCP2_high;
}

void write_AS6C4008(uint8_t data, uint8_t address)
{
	 OE_low;
	 WE_high;
	 CE_high;
	 write_74HC595(0b00000000);
	 write_74HC595(0b00000000);
	 write_74HC595(address);
	 set_data_bus_output;
	 data_bus = data;
	 CE_low;
	 WE_low;
	 WE_high;
	 CE_high;
}

uint8_t read_AS6C4008(uint8_t address)
{
	set_data_bus_input;
	WE_high;
	CE_high;
	OE_high;
	write_74HC595(0b00000000);
	write_74HC595(0b00000000);
	write_74HC595(address);
	CE_low;
	OE_low;
	return(PINC);
	CE_high;
	OE_high;
}

void initialise()
{
	initialise_74HC595();
	initialise_74HC595_2();
}

int main(void)
{
	initialise();
	write_AS6C4008(0b00110011, 0b00000000);
	write_AS6C4008(0b11001100, 0b00000001);
	write_74HC595_2(read_AS6C4008(0b00000000));
	_delay_ms(5000);
	write_74HC595_2(read_AS6C4008(0b00000001));
	_delay_ms(5000);
	write_74HC595_2(0b00110011);
	_delay_ms(5000);
	write_74HC595_2(0b11001100);	
}