timer.c

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/*********************************************************
* Function: timer driver
* timer 0,1,2,3,4 are supported.
*
* File: timer.c
* Author: Book Chen
* Date 2009.07.06
***********************************************************
*/
#include "includes.h"

TIMER_CONTROL TimerCtrl;
/**********************
 timer0 driver
***********************/
void Timer0Init(void){
                        // sfr setting
    TMR0IP=0;           // Set Timer0 Priority as Low
    TMR0IE=1;           // Enable Timer0 Interrupt
    T0CON=0x08;         // timer0 off,16bit,internal IC clock,bypass prescaler
    TMR0H=(0x10000-50000)/256;
    TMR0L=(0x10000-50000)%256;
    TMR0ON=1;           // timer 1 start
                        // variables
    TimerCtrl.TimeCounter=0;
}

void Timer0Enable(void){
    TMR0ON=1;
}

void Timer0Disable(void){
    TMR0ON=0;
}

void Timer0Isr(void){ // 5ms per tick
    TMR0ON=0;
    TMR0H=(0x10000-50000)/256;
    TMR0L=(0x10000-50000)%256;
    TMR0ON=1;
    if(LedCtrl.Timer!=0) LedCtrl.Timer--;
    if(KeyCtrl.Timer!=0) KeyCtrl.Timer--;
}
/**********************
 timer1 driver
***********************/
void Timer1Init(void){
    TMR1IP=0;           // Set Timer1 Priority as Low
    TMR1IE=1;           // Enable Timer0 Interrupt
    T1CON=0x80; // 16bit,no use timer1 osc,prescale 1:1
                // timer1 osc off,use internal clock,enable tiemr1
    TMR1H=(0x10000-5000)/256;
    TMR1L=(0x10000-5000)%256;  
    TMR1ON=0;   // start timer1
}

void Timer1Enable(void){
    TMR1ON=1;
}

void Timer1Disable(void){
    TMR1ON=0;
}

void Timer1Isr(void){
    TMR1ON=0;                       // stop timer
    TMR1H=(0x10000-5000)/256;
    TMR1L=(0x10000-5000)%256;
    if(LcmCtrl.Timer!=0) LcmCtrl.Timer--; 
    if(LcmCtrl.HasData==TRUE) TMR1ON=1; // start timer
    else{
        LcmCtrl.State=0;
        //TMR1ON=0;                // stop timer 1...no need
    }
}
/**********************
 timer2 driver
***********************/
void Timer2Init(void){
    TMR2IP=0;           // Set Timer2 Priority as Low
    TMR2IE=1;           // Enable Timer0 Interrupt
    T2CON=0x02;         // timer2 off,prescaler 1:16
    TMR2=0;
    PR2=0xff;
    TMR2ON=1;           // starts timer2
}

void Timer2Enable(void){
    TMR2ON=1;
}

void Timer2Disable(void){
    TMR2ON=0;
}

void Timer2Isr(void){
    TMR2ON=0;
    TMR2ON=1;
}
/**********************
 timer3 driver
***********************/
void Timer3Init(void){
    TMR3IP=0;           // Set Timer2 Priority as Low
    TMR3IE=1;           // Enable Timer0 Interrupt
    T3CON=0xc8;         // 16bit,use timer3.4 for ccp modules
                        // use Fosc/4 as clock,
    TMR3H=(0x10000-10000)/256;
    TMR3L=(0x10000-10000)%256;  
    TMR3ON=1;           // start timer3
}   

void Timer3Enable(void){
    TMR3ON=1;
}

void Timer3Disable(void){
    TMR3ON=0;
}

void Timer3Isr(void){
    TMR3ON=0;
    TMR3H=(0x10000-10000)/256;
    TMR3L=(0x10000-10000)%256;      
    TMR3ON=1;
}
/**********************
 timer4 driver
***********************/
void Timer4Init(void){
    TMR4IP=0;           // Set Timer2 Priority as Low
    TMR4IE=1;           // Enable Timer0 Interrupt
    T4CON=0x02;         // timer2 off,prescaler 1:16
    TMR4=0;
    PR4=0xff;
    TMR4ON=1;           // starts timer2
}

void Timer4Enable(void){
    TMR4ON=1;
}

void Timer4Disable(void){
    TMR4ON=0;
}

void Timer4Isr(void){
    TMR4ON=0;
    TMR4ON=1;
}

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