int main(void)
{
DDRB |= 1; /* make the LED pin an output */
DDRB &= 0xFD; /* make the switch pin an input */
PORTB &= 0xFD; /* make it tri-stated */
/* set up the timer */
BYTE timerHits = 0;
while (1) {
if ((PINB & 0x02) > 0) { /* if the button is pressed */
/* if the timer is running, keep going */
if (isTimerRunning()) {
continue;
}
/* if the timer isn't running, start it */
else {
enableTimerInterrupt();
startTimer(255, CLOCK_SCALE_1024);
sei();
timerHits = 0;
}
}
/* if the button is not pressed, stop and clear timer */
else
{
cli();
stopTimer();
disableTimerInterrupt();
timerHits = 0;
clearTimerTripped();
}
}
return 0; /* never reached */
}
void extruder::setSpeed(float sp)
{
// DC motor?
if(step_en_pin < 0)
{
e_speed = (byte)sp;
if(e_speed > 0)
waitForTemperature();
analogWrite(motor_speed_pin, e_speed);
return;
}
// No - stepper
disableTimerInterrupt();
if(sp <= 1.0e-4)
{
disableStep();
e_speed = 0; // Just use this as a flag
return;
}
else
{
waitForTemperature();
enableStep();
e_speed = 1;
}
extrude_step_count = 0;
float milliseconds_per_step = 60000.0/(E_STEPS_PER_MM*sp);
long thousand_ticks_per_step = 4*(long)(milliseconds_per_step);
setupTimerInterrupt();
setTimer(thousand_ticks_per_step);
enableTimerInterrupt();
}
