Define an internal function called startTimer in original Blink application. Sta

Question

Define an internal function called startTimer in original Blink application. Start timers in this new defined internal function instead of starting in Boot event.

//////////////////////////BlinkC.nc\\\\\\\\\\\\\\\\\\\

/**

* Implementation for Blink application. Toggle the red LED when a
* Timer fires.
**/

#include "Timer.h"

module BlinkC @safe()
{
uses interface Timer as Timer0;
uses interface Timer as Timer1;
uses interface Timer as Timer2;
uses interface Leds;
uses interface Boot;
}
implementation
{
event void Boot.booted()
{
call Timer0.startPeriodic( 250 );
call Timer1.startPeriodic( 500 );
call Timer2.startPeriodic( 1000 );
}

event void Timer0.fired()
{
dbg("BlinkC", "Timer 0 fired @ %s. ", sim_time_string());
call Leds.led0Toggle();
}
  
event void Timer1.fired()
{
dbg("BlinkC", "Timer 1 fired @ %s ", sim_time_string());
call Leds.led1Toggle();
}
  
event void Timer2.fired()
{
dbg("BlinkC", "Timer 2 fired @ %s. ", sim_time_string());
call Leds.led2Toggle();
}
}

//////////////////////////////////////BlinkAppC.nc\\\\\\\\\\\\\\\\\

configuration BlinkAppC
{
}
implementation
{
components MainC, BlinkC, LedsC;
components new TimerMilliC() as Timer0;
components new TimerMilliC() as Timer1;
components new TimerMilliC() as Timer2;

BlinkC -> MainC.Boot;

BlinkC.Timer0 -> Timer0;
BlinkC.Timer1 -> Timer1;
BlinkC.Timer2 -> Timer2;
BlinkC.Leds -> LedsC;
}

Explanation / Answer

/*
** File: main.c
** Date: 2015-MAR-19
** Target: PIC18F2520
** MPLAB: 8.92
** Compiler: C18 v3.47
*/
#include <p18cxxx.h>
void T0Delay(void);
/* Set up the configuration bits */
#pragma config OSC = HS, STVREN = ON, PWRT = OFF, BOREN = OFF
#pragma config WDT = OFF, PBADEN = OFF, CCP2MX = PORTBE
#pragma config MCLRE = ON, LVP = OFF, FCMEN = OFF, IESO = OFF
#pragma config BORV = 0, WDTPS = 32768, LPT1OSC = ON
#pragma config CP0 = OFF ,CP1 = OFF ,CP2 = OFF ,CP3 = OFF
#pragma config CPB = OFF ,CPD = OFF
#pragma config WRT0 = OFF ,WRT1 = OFF ,WRT2 = OFF ,WRT3 = OFF
#pragma config WRTB = OFF ,WRTD = OFF, WRTC = OFF
#pragma config EBTR0 = OFF,EBTR1 = OFF,EBTR2 = OFF,EBTR3 = OFF
#pragma config EBTRB = OFF
#define FOSC (20000000L)
#define FCYC (FOSC/4L) /* this is the frequency that the CPU will run at */
/*----------------------------------------------*/
/* Initialize this PIC */
/*----------------------------------------------*/
void PIC_Init( void )
{
INTCON = 1; /* Disable all interrupts */
INTCON3 = 1;
PIE1 = 0;
PIE2 = 0;
/* Keep us happy by turning off the comparators */
/* and let their pins be digital I/O. */

CMCON = 0x07; /* Turn off comparators */
/* Keep simulator happy by initializing the ADC */
/* Keep us happy by turning the ADC off. */
ADCON2 = 0x02; /* Select internal RC as ADC clock source */
ADCON1 = 0x0F; /* set all ADC inputs for digital I/O */
ADCON0 = 0x00; /* Turn off ADC */
/* Initialize the interrupt system */
RCONbits.IPEN = 0; /* Select legacy interrupt model. */
INTCONbits.PEIE = 0; /* Disable peripheral interrupt sources */
INTCONbits.GIE = 1; /* Disable interrupts */
}
void main ( void )
{
PIC_Init();
TRISC = 0x00; /* make all of PORTA outputs */

//for(;;) /* loop forever */
while(1)
{
PORTCbits.RC1=~PORTCbits.RC1;
T0Delay();
T0Delay();
T0Delay();
T0Delay();
T0Delay();
T0Delay();
T0Delay();
T0Delay();
T0Delay();
T0Delay();
T0Delay();
T0Delay();
T0Delay();
T0Delay();
T0Delay();
T0Delay();
T0Delay();
}
}
void T0Delay()
{
T0CON=0x01;//timer 0,16bit mode,1:4 prescalar
TMR0H=0x85; //load TH0
TMR0L=0xEE; //LOAD TL0
T0CONbits.TMR0ON=1; //START TIMER
while(INTCONbits.TMR0IF==0);// WAIT FOR TIMER0 TF0 TO ROLL OVER
T0CONbits.TMR0ON=0;//TURN OFF TIMER
INTCONbits.TMR0IF==0;// CLEAR TF0
}

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