#include <avr/io.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>

#define F_CPU 1000000UL
#include <util/delay.h>


/************************

SPI

*************************/

#define SDI PB2
#define SCK PB1
#define CS PE7
#define LDAC PE6

#define Rele1 PB4

int kanal = 0;
int data = 255;
int konfig = 0b0001;

void posli(void)
{
			PORTB &= ~(1<<SDI);
		asm("NOP");			//synchro
		PORTB |= (1<<SCK);	//nabezna hrana SCK
		asm("NOP");			//Doba trvani SCK
		asm("NOP");
		PORTB &= ~(1<<SCK);	//shozeni SCK	
		asm("NOP");
		asm("NOP");			//synchro
		PORTB |= (1<<SCK);	//nabezna hrana SCK
		asm("NOP");			//Doba trvani SCK
		asm("NOP");
		PORTB &= ~(1<<SCK);	//shozeni SCK	
		asm("NOP");
		asm("NOP");			//synchro
		PORTB |= (1<<SCK);	//nabezna hrana SCK
		asm("NOP");			//Doba trvani SCK
		asm("NOP");
		PORTB &= ~(1<<SCK);	//shozeni SCK	
		asm("NOP");
		PORTB |= (1<<SDI);
		asm("NOP");			//synchro
		PORTB |= (1<<SCK);	//nabezna hrana SCK
		asm("NOP");			//Doba trvani SCK
		asm("NOP");
		PORTB &= ~(1<<SCK);	//shozeni SCK	
		asm("NOP");

		PORTB &= ~(1<<SDI);
		asm("NOP");			//synchro
		PORTB |= (1<<SCK);	//nabezna hrana SCK
		asm("NOP");			//Doba trvani SCK
		asm("NOP");
		PORTB &= ~(1<<SCK);	//shozeni SCK	
		asm("NOP");
		asm("NOP");			//synchro
		PORTB |= (1<<SCK);	//nabezna hrana SCK
		asm("NOP");			//Doba trvani SCK
		asm("NOP");
		PORTB &= ~(1<<SCK);	//shozeni SCK	
		asm("NOP");
		asm("NOP");			//synchro
		PORTB |= (1<<SCK);	//nabezna hrana SCK
		asm("NOP");			//Doba trvani SCK
		asm("NOP");
		PORTB &= ~(1<<SCK);	//shozeni SCK	
		asm("NOP");
		PORTB |= (1<<SDI);
		asm("NOP");			//synchro
		PORTB |= (1<<SCK);	//nabezna hrana SCK
		asm("NOP");			//Doba trvani SCK
		asm("NOP");
		PORTB &= ~(1<<SCK);	//shozeni SCK	
		asm("NOP");
}



int main(void)
{
	if(kanal == 0)
		konfig = 0b1000;	// ! SHDN, GAIN, Dont care, CH A
	else
		konfig = 0b1001;	// ! SHDN, GAIN, Dont care, CH B

	DDRB = 0xFF;
	DDRE = 0xFF;
	PORTB = 0x00;
	PORTE = 0x00;
	DDRD=0xF0;
	PORTD=0x00;	

	//PORTB |= (1<<Rele1);
	
	PORTE |= (1<<LDAC);
	asm("NOP");
	PORTE &= ~(1<<CS);

	/*	konfig	*/

		PORTB &= ~(1<<SDI);
		asm("NOP");			//synchro
		PORTB |= (1<<SCK);	//nabezna hrana SCK
		asm("NOP");			//Doba trvani SCK
		asm("NOP");
		PORTB &= ~(1<<SCK);	//shozeni SCK	
		asm("NOP");
		asm("NOP");			//synchro
		PORTB |= (1<<SCK);	//nabezna hrana SCK
		asm("NOP");			//Doba trvani SCK
		asm("NOP");
		PORTB &= ~(1<<SCK);	//shozeni SCK	
		asm("NOP");
		asm("NOP");			//synchro
		PORTB |= (1<<SCK);	//nabezna hrana SCK
		asm("NOP");			//Doba trvani SCK
		asm("NOP");
		PORTB &= ~(1<<SCK);	//shozeni SCK	
		asm("NOP");
		PORTB |= (1<<SDI);
		asm("NOP");			//synchro
		PORTB |= (1<<SCK);	//nabezna hrana SCK
		asm("NOP");			//Doba trvani SCK
		asm("NOP");
		PORTB &= ~(1<<SCK);	//shozeni SCK	
		asm("NOP");	

		posli();
		

		/*	unknown bits	*/

		PORTB |= (1<<SCK);	//nabezna hrana SCK
	asm("NOP");			//Doba trvani SCK
	asm("NOP");
	PORTB &= ~(1<<SCK);	//shozeni SCK	
	asm("NOP");

		PORTB |= (1<<SCK);	//nabezna hrana SCK
	asm("NOP");			//Doba trvani SCK
	asm("NOP");
	PORTB &= ~(1<<SCK);	//shozeni SCK	
	asm("NOP");

		PORTB |= (1<<SCK);	//nabezna hrana SCK
	asm("NOP");			//Doba trvani SCK
	asm("NOP");
	PORTB &= ~(1<<SCK);	//shozeni SCK	
	asm("NOP");

		PORTB |= (1<<SCK);	//nabezna hrana SCK
	asm("NOP");			//Doba trvani SCK
	asm("NOP");
	PORTB &= ~(1<<SCK);	//shozeni SCK	
	asm("NOP");

		/*	end of sending	*/

	PORTE |= (1<<CS);

	_delay_us(1);

	PORTE &= ~(1<<LDAC);
	asm("NOP");	
	asm("NOP");	
	PORTE |= (1<<LDAC);


	return(0);
}