void InitializeVibration(void)
{
// Make sure the vibe motor is off
SetVibeMotorState(pdFALSE);
// Initialize the timer for the vibe motor with the right PWM params.
SetupVibrationMotorTimerAndPwm();
// Vibe motor duration timer.
VibeEventTimerCount = 0;
}
/* Handle the message from the host that starts a vibration event */
void SetVibrateModeHandler(tHostMsg* pMsg)
{
// overlay a structure pointer on the data section
tSetVibrateModePayload* pMsgData;
pMsgData = (tSetVibrateModePayload*) pMsg->pPayload;
// set it active or cancel it
VibeEventActive = pMsgData->Enable;
// save the parameters from the message
motorOn = pMsgData->Enable;
tWordByteUnion temp;
temp.byte0 = pMsgData->OnDurationLsb;
temp.byte1 = pMsgData->OnDurationMsb;
timeOn = temp.word / RTC_TIMER_MS_PER_TICK;
temp.byte0 = pMsgData->OffDurationLsb;
temp.byte1 = pMsgData->OffDurationMsb;
timeOff = temp.word / RTC_TIMER_MS_PER_TICK;
cycleCount = pMsgData->NumberOfCycles;
// Start or stop the RTC PS timer based on whether the motor is being turned
// on or off
if ( VibeEventActive )
{
EnableRtcPrescaleInterruptUser(RTC_TIMER_VIBRATION);
EnableVibratorPwm();
}
else
{
DisableRtcPrescaleInterruptUser(RTC_TIMER_VIBRATION);
DisableVibratorPwm();
}
// Use a separate timer that counts Rtc_Prescale_Timer_Static messages to
// get the time for the vibe motor.
if(VibeEventActive)
{
VibeEventTimerCount = 0;
timeStart = 0;
}
// the next event is to turn
nextActionTime = timeStart + timeOn;
// Set/clear the port bit that controls the motor
SetVibeMotorState(motorOn);
}
/*
* Once the phone has started a vibration event this controls the pulsing
* on and off.
*
* This requires < 7 us and is done in the ISR
*/
void VibrationMotorStateMachineIsr(void)
{
VibeEventTimerCount++;
// If we have an active event
if( VibeEventActive )
{
// is it time for the next action
if(VibeEventTimerCount >= nextActionTime)
{
// if the motor is currently on
if(motorOn)
{
motorOn = pdFALSE;
nextActionTime += timeOff;
if ( cycleCount > 1 )
{
cycleCount --;
}
else /* last cycle */
{
VibeEventActive = pdFALSE;
DisableRtcPrescaleInterruptUser(RTC_TIMER_VIBRATION);
DisableVibratorPwm();
}
}
else
{
motorOn = pdTRUE;
nextActionTime += timeOn;
}
}
// Set/clean the port bit that controls the motor
SetVibeMotorState(motorOn);
}
else
{
DisableRtcPrescaleInterruptUser(RTC_TIMER_VIBRATION);
DisableVibratorPwm();
}
}
