tmr2.c

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/*
    (c) 2018 Microchip Technology Inc. and its subsidiaries. 
    
    Subject to your compliance with these terms, you may use Microchip software and any 
    derivatives exclusively with Microchip products. It is your responsibility to comply with third party 
    license terms applicable to your use of third party software (including open source software) that 
    may accompany Microchip software.
    
    THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, WHETHER 
    EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, INCLUDING ANY 
    IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, AND FITNESS 
    FOR A PARTICULAR PURPOSE.
    
    IN NO EVENT WILL MICROCHIP BE LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, 
    INCIDENTAL OR CONSEQUENTIAL LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND 
    WHATSOEVER RELATED TO THE SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP 
    HAS BEEN ADVISED OF THE POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO 
    THE FULLEST EXTENT ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL 
    CLAIMS IN ANY WAY RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT 
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*/
 
#include <xc.h>
#include "tmr2.h"
 
void TMR2_Initialize(void)
{
    // Set TMR2 to the options selected in the User Interface
 
    // PR2 255; 
    PR2 = 0xFF;
 
    // TMR2 0; 
    TMR2 = 0x00;
 
    // Clearing IF flag.
    PIR1bits.TMR2IF = 0;
 
    // T2CKPS 1:1; TOUTPS 1:1; TMR2ON on; 
    T2CON = 0x04;
}
 
void TMR2_StartTimer(void)
{
    // Start the Timer by writing to TMRxON bit
    T2CONbits.TMR2ON = 1;
}
 
void TMR2_StopTimer(void)
{
    // Stop the Timer by writing to TMRxON bit
    T2CONbits.TMR2ON = 0;
}
 
uint8_t TMR2_ReadTimer(void)
{
    uint8_t readVal;
 
    readVal = TMR2;
 
    return readVal;
}
 
void TMR2_WriteTimer(uint8_t timerVal)
{
    // Write to the Timer2 register
    TMR2 = timerVal;
}
 
void TMR2_LoadPeriodRegister(uint8_t periodVal)
{
   PR2 = periodVal;
}
 
bool TMR2_HasOverflowOccured(void)
{
    // check if  overflow has occurred by checking the TMRIF bit
    bool status = PIR1bits.TMR2IF;
    if(status)
    {
        // Clearing IF flag.
        PIR1bits.TMR2IF = 0;
    }
    return status;
}