vTimerISREntry:

    portSAVE_CONTEXT        ; Save the context of the current task.

    bl    timer0_c_irq_handler            ; Call the ISR routine.

    portRESTORE_CONTEXT        ; Restore the context of the current task -
                            ; which may be different to the task that
                            ; was interrupted.

void timer0_c_irq_handler(void)
{
    AT91PS_TC TC_pt = AT91C_BASE_TC0;
    unsigned int dummy;
    //* Acknowledge interrupt status
    dummy = TC_pt->TC_SR;
    //* Suppress warning variable "dummy" was set but never used
    dummy = dummy;
//    count_timer0_interrupt++;
    //* Read the output state
    vParTestToggleLED(3);
}

void soft_uart_ini(void)
{
      unsigned int dummy;
          portENTER_CRITICAL();
        {
        
        //* First, enable the clock of the TIMER
            AT91F_PMC_EnablePeriphClock ( AT91C_BASE_PMC, 1<< AT91C_ID_TC0 );

        //* Disable the clock and the interrupts
        AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS;
        AT91C_BASE_TC0->TC_IDR = 0xFFFFFFFF;

        //* Clear status bit
            dummy = AT91C_BASE_TC0->TC_SR;
        //* Suppress warning variable "dummy" was set but never used
            dummy = dummy;
        //* Set the Mode of the Timer Counter
        AT91C_BASE_TC0->TC_CMR = 4;
    
        //* Enable the clock
        AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN;
        
    AT91F_AIC_ConfigureIt ( AT91C_BASE_AIC, AT91C_ID_TC0, TIMER0_INTERRUPT_LEVEL,AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL, vTimerISREntry);
    AT91C_BASE_TC0->TC_IER = AT91C_TC_CPCS;  //  IRQ enable CPC
    AT91F_AIC_EnableIt (AT91C_BASE_AIC, AT91C_ID_TC0);

    AT91C_BASE_TC0->TC_CCR = AT91C_TC_SWTRG;
    
        }
        portEXIT_CRITICAL();
}

    AT91C_BASE_AIC->AIC_EOICR = 0;                    // Reset AIC logic

    __writeMemory32(0xffffffff,0xFFFFF130,"Memory");
    .....
    __writeMemory32(0xffffffff,0xFFFFF130,"Memory");
    // всего 8 раз.

static void prvSetupHardware( void )
{
    /* When using the JTAG debugger the hardware is not always initialised to
    the correct default state.  This line just ensures that this does not
    cause all interrupts to be masked at the start. */
    AT91C_BASE_AIC->AIC_EOICR = 0;
    
    /* Most setup is performed by the low level init function called from the
    startup asm file. */

    /* Configure the PIO Lines corresponding to LED1 to LED4 to be outputs as
    well as the UART Tx line. */
    AT91F_PIO_CfgOutput( AT91C_BASE_PIOA, LED_MASK | (1<<1) | (1<<27) | (1<<24));
    
    /* Enable the peripheral clock. */
    AT91F_PMC_EnablePeriphClock( AT91C_BASE_PMC, 1 << AT91C_ID_PIOA );



}