// chip Registers addresses:
#define NO_OP 0x00
#define DECODE_MODE 0X09
#define INTENSITY 0x0A
#define  SCAN_LIMIT 0x0B
#define SHUTDOWN 0X0C
#define DISPLAY_TEST 0X0F

//Operation
#define NORMAL_OPERATION 1
#define TEST_OFF 0
#define TEST_ON 1

//Decode mode
#define NO_DECODE 0X00
#define CODE_B_D0 0x01
#define CODE_B_D3_D0 0x0F
#define CODE_B_D7_D0 0xFF

#define ALL_DIGITS 7

void Write_to_display(uint8_t address, uint8_t cData)
{
  PORTB &= ~(1 << PORTB2);
  SPDR = address;
  while (!(SPSR & (1 << SPIF)));
  SPDR = cData;
  while (!(SPSR & (1 << SPIF)));
  _delay_us(1);
  PORTB |= (1 << PORTB2);

}


void Matrix_init(void)
{
  Write_to_display(DISPLAY_TEST, TEST_OFF); //test mode off
  Write_to_display(SCAN_LIMIT, ALL_DIGITS);
  Write_to_display(SHUTDOWN, NORMAL_OPERATION);
  Write_to_display(INTENSITY, 7);
  Write_to_display(DECODE_MODE, NO_DECODE);
}




void Write_to2_display(uint8_t address, uint8_t cData)
{
  PORTB &= ~(1 << PORTB2);
  SPDR = address;
  while (!(SPSR & (1 << SPIF)));
  SPDR = cData;
  while (!(SPSR & (1 << SPIF)));
  SPDR = address;
  while (!(SPSR & (1 << SPIF)));
  SPDR = cData;
  while (!(SPSR & (1 << SPIF)));
  _delay_us(1);
  PORTB |= (1 << PORTB2);

}


void Matrix2_init(void)
{
  Write_to2_display(DISPLAY_TEST, TEST_OFF);
  Write_to2_display(SCAN_LIMIT, ALL_DIGITS);
  Write_to2_display(SHUTDOWN, NORMAL_OPERATION);
  Write_to2_display(INTENSITY, 7);
  Write_to2_display(DECODE_MODE, NO_DECODE);
}


void SPI_MasterInit(void);
void SPI_MasterTx(uint8_t cData);
void Write_to_display(uint8_t address, uint8_t cData);
void Matrix_init();

void setup() {
  // put your setup code here, to run once:
  SPI_MasterInit();
  Matrix_init();

}

void loop() {
  // put your main code here, to run repeatedly:
		//for(int i =1; i<=8;i++)
		//{
			//Write_to_display(i,0xff);
			//_delay_ms(10);	
		//}
		for(int i =0; i<=7;i++)
		{
			Write_to_display(i+1,1<<i);
			_delay_ms(10);
		}
		
		
		
		_delay_ms(500);


}


void SPI_MasterInit(void)
{

  /* Set MOSI and SCK output, all others input */
  DDRB |= (1 << PORTB3 ) | (1 << PORTB5) | (1 << PORTB2 );
  /* Enable SPI, Master, set clock rate Fck/16 */
  SPCR = (1 << SPE) | (1 << MSTR) | (1 << SPR0);
  PORTB |= (1 << PORTB2);
}


void SPI_MasterTx(uint8_t cData)
{
  PORTB &= ~(1 << PORTB2);

  SPDR = cData;
  while (!(SPSR & (1 << SPIF)));

  PORTB |= (1 << PORTB2);
}