Getting Started

Chapter 6: C Functions and Program Structures

for(int i = 0; i < 10; i++)

TIFR2 = 0xFF; // delete TIFR2 flags

(TIFR2 && (1<<OCF2A)) ); // wait for timer2 compareflag

TCCR1B = 0; // stop timer1

sei(); // __enable_interrupt(); // enable global interrupt

if ( (TIFR1 && (1<<TOV1)) )
{
temp = 0xFFFF; // if timer1 overflows, set the temp to 0xFFFF
}
else
{ // read out the timer1 counter value
tempL = TCNT1L;

temp = (temp << 8);

temp += tempL;

OSCCAL

OSCCAL

CCR1B = (1<<CS10); // start timer1

e makefile:

while((ASSR & 0x01) | (ASSR & 0x04));

// wait for external crystal to stabilise

_delay_loop_2(30000);

while(!calibrate)
{
cli(); // mt __disable_interrupt(); // disable global interrupt

TIFR1 = 0xFF; // delete TIFR1 flags

TCNT1H = 0; // clear timer1 counter
TCNT1L = 0;
TCNT2 = 0; // clear timer2 counter

while (!

temp = TCNT1H;

}

if (temp > 6250)
{
OSCCAL--; // the internRC oscillator runs to fast, decrease the
}
else if (temp < 6120)
{
OSCCAL++; // the internRC oscillator runs to slow, increase the
}
else
calibrate = 1;//TRUE; // the interRC is correct

T
}
}

Save this file as PC_Comm.c.

Finally make these changes to th