void timer0_isr (void)
{
  ***
  // мигнуть диодом
}

char InitTimer()
{  
  AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_TC0;// Enable Clock for TIM0
  AT91C_BASE_TC0->TC_CCR    = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
  AT91C_BASE_TC0->TC_CMR    = 2 | AT91C_TC_CPCTRG;
  AT91C_BASE_TC0->TC_RC     = 0x0E; // ??

  // TIM0 Interrupt: Mode and Vector with Lowest Priority and Enable
  AT91C_BASE_AIC->AIC_SMR[AT91C_ID_TC0] = AT91C_AIC_SRCTYPE_INT_POSITIVE_EDGE | AT91C_AIC_PRIOR_HIGHEST;
  AT91C_BASE_AIC->AIC_SVR[AT91C_ID_TC0] = (unsigned long) timer0_isr;
  AT91C_BASE_AIC->AIC_IECR = (1 << AT91C_ID_TC0);
  AT91C_BASE_TC0->TC_IER    = AT91C_TC_CPCS;

  return 1;
}