Using Atmel Studio 7

#include <avr/io.h>
#include <util/delay.h>

#define LED      PB0
#define LED_DDR  DDRB
#define LED_PORT PORTB

#define DELAYTIME 200

#define setBit(sfr, bit)     (_SFR_BYTE(sfr) |= (1 << bit))
#define clearBit(sfr, bit)   (_SFR_BYTE(sfr) &= ~(1 << bit))
#define toggleBit(sfr, bit)  (_SFR_BYTE(sfr) ^= (1 << bit))

int main(void) {

  // Init
  setBit(LED_DDR, LED);                      /* set LED pin for output */

  // Mainloop
  while (1) {

    setBit(LED_PORT, LED);
    _delay_ms(DELAYTIME);

    clearBit(LED_PORT, LED);
    _delay_ms(DELAYTIME);

  }
  return 0;                                          /* end mainloop */
}

// POV toy demo framework //

// ------- Preamble -------- //
#include <avr/io.h>
#include <util/delay.h>

// -------- Functions --------- //
void POVDisplay(uint8_t oneByte) {
  PORTB = oneByte;
  _delay_ms(2);
}

int main(void) {
  // -------- Inits --------- //
  DDRB = 0xff;                    /* Set up all of LED pins for output */
  // ------ Event loop ------ //
  while (1) {                                              /* mainloop */
    POVDisplay(0b00001110);
    POVDisplay(0b00011000);
    POVDisplay(0b10111101);
    POVDisplay(0b01110110);
    POVDisplay(0b00111100);
    POVDisplay(0b00111100);
    POVDisplay(0b00111100);
    POVDisplay(0b01110110);
    POVDisplay(0b10111101);
    POVDisplay(0b00011000);
    POVDisplay(0b00001110);

    PORTB = 0;
    _delay_ms(10);
  }                                                    /* end mainloop */
  return 0;
}

/* Standard Macros */
/* You can totally get by without these, but why? */

/* Make sure we've already got io / sfr / pindefs loaded */
#ifndef   _AVR_IO_H_
#include  <avr/io.h>
#endif

/* Reminder: the following useful bit-twiddling macros are
   always included in avr/sfr_defs.h, which is called from
   avr/io.h 
 bit_is_set(sfr, bit)
 bit_is_clear(sfr, bit)
 loop_until_bit_is_set(sfr, bit)
 loop_until_bit_is_clear(sfr, bit)
*/

/* Define up the full complement of bit-twiddling macros */
#define BV(bit)               (1 << bit)
#define set_bit(sfr, bit)     (_SFR_BYTE(sfr) |= BV(bit))  // old sbi()
#define clear_bit(sfr, bit)   (_SFR_BYTE(sfr) &= ~BV(bit)) // old cbi()
#define toggle_bit(sfr, bit)  (_SFR_BYTE(sfr) ^= BV(bit))  

// ---------------
//   Pin Defines
// ---------------

#define LED_PORT                PORTB
#define LED_PIN                 PINB
#define LED_DDR                 DDRB

#define LED0                    PB0
#define LED1                    PB1
#define LED2                    PB2
#define LED3                    PB3
#define LED4                    PB4
#define LED5                    PB5
#define LED6                    PB6
#define LED7                    PB7

#define BUTTON_PORT             PORTD
#define BUTTON_PIN              PIND
#define BUTTON_DDR              DDRD

#define BUTTON                  PD2
#define BUTTON2                 PD3
#define BUTTON3                 PD4

#define SPEAKER                 PD6                            /* OC0A */
#define SPEAKER_PORT            PORTD
#define SPEAKER_PIN             PIND
#define SPEAKER_DDR             DDRD

#define ANTENNA                 PD5                            /* OC0B */
#define ANTENNA_PORT            PORTD
#define ANTENNA_PIN             PIND
#define ANTENNA_DDR             DDRD

#define MODULATION              PD3                            /* OC2B */
#define MODULATION_PORT         PORTD
#define MODULATION_PIN          PIND
#define MODULATION_DDR          DDRD

#define LIGHT_SENSOR            PC0                            /* ADC0 */
#define LIGHT_SENSOR_PORT       PORTC
#define LIGHT_SENSOR_PIN        PINC
#define LIGHT_SENSOR_DDR        DDRC

#define CAP_SENSOR              PC1                            /* ADC1 */
#define CAP_SENSOR_PORT         PORTC
#define CAP_SENSOR_PIN          PINC
#define CAP_SENSOR_DDR          DDRC

#define PIEZO                   PC2                            /* ADC2 */
#define PIEZO_PORT              PORTC
#define PIEZO_PIN               PINC
#define PIEZO_DDR               DDRC

#define POT                     PC3                            /* ADC3 */
#define POT_PORT                PORTC
#define POT_PIN                 PINC
#define POT_DDR                 DDRC

//  SPI and I2C serial mode defines

#define SPI_SS                     PB2
#define SPI_SS_PORT                PORTB
#define SPI_SS_PIN                 PINB
#define SPI_SS_DDR                 DDRB

#define SPI_MOSI                     PB3
#define SPI_MOSI_PORT                PORTB
#define SPI_MOSI_PIN                 PINB
#define SPI_MOSI_DDR                 DDRB

#define SPI_MISO                     PB4
#define SPI_MISO_PORT                PORTB
#define SPI_MISO_PIN                 PINB
#define SPI_MISO_DDR                 DDRB

#define SPI_SCK                     PB5
#define SPI_SCK_PORT                PORTB
#define SPI_SCK_PIN                 PINB
#define SPI_SCK_DDR                 DDRB

#define I2C_SDA                     PC4
#define I2C_SDA_PORT                PORTC
#define I2C_SDA_PIN                 PINC
#define I2C_SDA_DDR                 DDRC

#define I2C_SCL                     PC5
#define I2C_SCL_PORT                PORTC
#define I2C_SCL_PIN                 PINC
#define I2C_SCL_DDR                 DDRC