/* Start tasks with interrupts enables. */
#define portFLAGS_INT_ENABLED( ( portSTACK_TYPE ) 0x80 )

/* Hardware constants for timer 1. */
#if !(__AVR_ATmega1284P__ || __AVR_ATmega1281__)
#define portCLEAR_COUNTER_ON_MATCH( ( unsigned char ) 0x08 )
#define portPRESCALE_64( ( unsigned char ) 0x03 )
#define portCLOCK_PRESCALER( ( unsigned long ) 64 )
#define portCOMPARE_MATCH_A_INTERRUPT_ENABLE( ( unsigned char ) 0x10 )
#else
#define portCLEAR_COUNTER_ON_MATCH( 1<#define portPRESCALE_1024( (1<#define portPRESCALE_256( 1<#define portPRESCALE_64( (1<#define portCLOCK_PRESCALER( 64 )
#define portCOMPARE_MATCH_A_INTERRUPT_ENABLE( 1<#define TIMSKTIMSK1
#endif

static void prvSetupTimerInterrupt( void )
{
unsigned long ulCompareMatch;
unsigned char ucHighByte, ucLowByte;


/* Using 16bit timer 1 to generate the tick.  Correct fuses must be
selected for the configCPU_CLOCK_HZ clock. */

ulCompareMatch = configCPU_CLOCK_HZ / configTICK_RATE_HZ;

/* We only have 16 bits so have to scale to get our required tick rate. */
ulCompareMatch /= portCLOCK_PRESCALER;

/* Adjust for correct value. */
ulCompareMatch -= ( unsigned long ) 1;

/* Setup compare match value for compare match A.  Interrupts are disabled 
before this is called so we need not worry here. */
ucLowByte = ( unsigned char ) ( ulCompareMatch & ( unsigned long ) 0xff );
ulCompareMatch >>= 8;
ucHighByte = ( unsigned char ) ( ulCompareMatch & ( unsigned long ) 0xff );
OCR1AH = ucHighByte;
OCR1AL = ucLowByte;

// Generate tick pulses on PD5
//DDRD |= (1<    TCCR1A = (0<           | (0<           | (0<                                        //  TOP is OCR1A

/* Setup clock source and compare match behaviour. */
// ucLowByte = portCLEAR_COUNTER_ON_MATCH | portPRESCALE_64;
// TCCR1B = ucLowByte;
    TCCR1B = (0<           | (0<           | (0<
    TCCR1C = (0<
/* Enable the interrupt - this is okay as interrupt are currently globally
disabled. */
ucLowByte = TIMSK;
ucLowByte |= portCOMPARE_MATCH_A_INTERRUPT_ENABLE;
TIMSK = ucLowByte;
}