void mTouchCapPhy_TickInit( void )
{
TMR4 = 0;
//If the Low power demo is not enabled
#ifndef LOW_POWER_DEMO_ENABLE
PR4 = TIMER_PERIOD;
T4CON = TIMER_ON | TIMER_SOURCE_INTERNAL | GATED_TIME_DISABLED | TIMER_16BIT_MODE | TIMER4_PRESCALER;
//If Low Power demo is enabled
#else
//If the Primary oscillator is switched to FRC for the Low Power Demo then load PR4 with
//the period value which is calculated for FRC
// The time period is selected such that the functions mTouchCapPhy_ReadCTMU() and mTouchCapPhy_AverageData()
// should be executed within the time period
//Clock_Switch_Enable_Flag -- this will indicate that clock is switched from Primary to FRC
if(Clock_Switch_Enable_Flag)
{
PR4=TIMER_PERIOD_WITH_FRC; //Timer value when FRC is used for Timer4 interrupt;
T4CON = TIMER_ON | TIMER_SOURCE_INTERNAL | GATED_TIME_DISABLED | TIMER_16BIT_MODE | TIMER4_PRESCALER;
Timer4_Period_Clock_Switch_Flag =HIGH; //To indicate that the timer4 init for FRC clock is complete
}
//If the Primary Oscillator is used
else
{
PR4 = TIMER_PERIOD;
T4CON = TIMER_ON | TIMER_SOURCE_INTERNAL | GATED_TIME_DISABLED | TIMER_16BIT_MODE | TIMER4_PRESCALER;
}
#endif //end of #ifndef LOW_POWER_DEMO_ENABLE
Set_ScanTimer_IF_Bit_State(DISABLE); //Clear flag
Set_ScanTimer_IE_Bit_State(ENABLE); //Enable interrupt
Set_ScanTimer_ON_Bit_State(ENABLE) ; //Run timer
}
void __ISR(_TIMER_4_VECTOR, IPL1SOFT) mTouchCapTmr_Tmr4ISR(void)
#endif
{
void (*ptr_fcn)(void);
/* init local wiht the callback function ptr */
ptr_fcn = (void (*) ())T4CallBackISR;
if (ptr_fcn != 0)
{
// call the callback isr
(*ptr_fcn)();
}
Set_ScanTimer_IF_Bit_State(DISABLE); //Clear interrupt flag
if ( EmTouchDataReady == TRUE )
{
Set_ScanTimer_IE_Bit_State(DISABLE); // Disable interrupt
Set_ScanTimer_ON_Bit_State(DISABLE); // Stop timer 4
}
}
/******************************************************************************
* Function: void InitTimer(void)
*
* PreCondition: None
*
* Input: unsigned int time
*
* Output: None
*
* Side Effects: None
*
* Overview: Set the period for timer 4 depending on input param time
*
* Note: Stops and restarts the timer when setting the new period
*****************************************************************************/
void mTouchCapTmr_InitTimer4(void)
{
// set up the timer interrupt with a priority of 1
Set_ScanTimer_Priority(1);
// interrupt subpriority is 0
Set_ScanTimer_Subpriority(0);
// clear the interrupt flag
Set_ScanTimer_IF_Bit_State(0);
// initialize the callback pointer with the value passed as argument
T4CallBackISR = TIMERCALLBACKFUNC;
/* enable the interrupt */
Set_ScanTimer_IE_Bit_State(1);
TMR4 = 0;
PR4 = TIMER4_PERIOD;
// restart the timer
Set_ScanTimer_ON_Bit_State(1);
return;
}
