//************************************************************************
void turnOffPWM(uint8_t timer)
{
switch(timer)
{
#ifdef _OCMP1
case TIMER_OC1: CloseOC1(); break;
#endif
#ifdef _OCMP2
case TIMER_OC2: CloseOC2(); break;
#endif
#ifdef _OCMP3
case TIMER_OC3: CloseOC3(); break;
#endif
#ifdef _OCMP4
case TIMER_OC4: CloseOC4(); break;
#endif
#ifdef _OCMP5
case TIMER_OC5: CloseOC5(); break;
#endif
}
}
// Interrupt Service Routine for TIMER 3. This is used to switch between the
// buzzing and quiet periods when ON_CYCLES or OFF_CYCLES are reached.
extern "C" void __ISR (_TIMER_3_VECTOR, ipl5) T3_IntHandler (void)
{
alarm--;
if (alarm == 0) {
buzzing = !buzzing;
if (is_buzzer_on && buzzing) {
switch(BUZZER_PIN) {
case 9:
OpenOC4(OC_ON | OC_TIMER3_SRC | OC_PWM_FAULT_PIN_DISABLE, DUTY_CYCLE, 0);
break;
case 10:
OpenOC5(OC_ON | OC_TIMER3_SRC | OC_PWM_FAULT_PIN_DISABLE, DUTY_CYCLE, 0);
break;
}
alarm = ON_CYCLES;
} else {
switch(BUZZER_PIN) {
case 9: CloseOC4(); break;
case 10: CloseOC5(); break;
}
alarm = OFF_CYCLES;
pin_write(BUZZER_PIN, LOW);
}
}
// Clear interrupt flag
// This will break other interrupts and millis() (read+clear+write race condition?)
// IFS0bits.T3IF = 0; // DON'T!!
// Instead:
mT3ClearIntFlag();
}
/****************************************************************************
Function
PWM_end
Parameters
None.
Returns
None
Description
Disables the PWM sub-system.
Notes
Simply releases the lines and disables the timer
Author
Max Dunne, 2011.11.14
****************************************************************************/
void PWM_end(void) {
CloseTimer2();
CloseOC1();
CloseOC2();
CloseOC3();
CloseOC4();
CloseOC5();
usedChannels=0;
}