int main(void)
{
  // Disable PLL
  PLLCON = 0;
  // Write Feed
  PLLFEED = 0xAA;
  PLLFEED = 0x55;
  // Set periphery divider /4
  APBDIV_bit.APBDIV  = 0;
  // Memory map init flash memory is mapped on 0 address
#ifdef FLASH
  MEMMAP_bit.MAP = 1;
#else
  MEMMAP_bit.MAP = 2;
#endif

  // Init variables
  PatternInd   = 0;
  pNextPattern = pLedPatterns[0];

  __disable_interrupt();
  // Init VIC
  VicInit();

  // Init GPIO
  PINSEL0 = PINSEL1 = 0;
  // Disable fast IO
  SCS_bit.GPIO0M = 0;
  // Set pins connect to LEDs as outputs
  IODIR = LED_MASK;
  // All LEDs off
  IOCLR = LED_MASK;
  KeysInit();

  // Init timer
  // Reset and stop timer0
  T0TCR = 2;
  // Set timer counters mode - clock by PCLK
  T0CTCR = 0;
  // Set timer prescaler
  T0PR  = 0;
  // Set timer period
  T0MR0 = PCCLK/TICK_PER_SEC;
  // Set match action - interrupt by MACH0 enable, reset counter
  T0MCR = 3;
  // No external action
  T0EMR = 0;
  // Assign to IRQ
  VICIntSelect_bit.TIMER0 = 0;
  // Set interrupt slots
  VICVectAddr3 = (unsigned int) Timer0Handler;
  VICVectCntl3_bit.NUMBER = VIC_TIMER0;
  VICVectCntl3_bit.ENABLED = 1;
  // Timer 0 interrupt enable
  VICIntEnable_bit.TIMER0 = 1;
  // Enable timer0
  T0TCR = 1;

// __enable_interrupt();

  while(1)
  {
  
    FIOCLR = LED_MASK;
   // wait();
   FIOSET = LED_MASK;
    //wait();
  
  
  
  
  
  };
} // main(void)

    IOCLR = LED_MASK;
   // wait();
   IOSET = LED_MASK;
    //wait();

Error[Pe020]: identifier "IO0DIR" is undefined
Error[Pe020]: identifier "IO0SET" is undefined
Error[Pe020]: identifier "IO0CLR" is undefined

IOSET = BIT(26); // погасили
IOCLR = BIT(26); // зажгли

#define BIT(x) (1UL<<(x))

#define FOSC            14745600UL
#define TICK_PER_SEC    (8UL)
#define TIM_DPER        ((PCCLK*DELTA_PER)/1000UL)