Problem with multisim timer program

[john]

Hello all,

             I am currently having trouble building this timer counter program in multisim. It seems to compile okm in keil. however in multisim

I get two “constant expression required” error messages.Any help would be greatly appreciated as this is holding up the rest of my project as i need to use an interrupt to compare the two values (frequencies) in the timers.

 

Thanks for any input,

 

 

MY SAMPLE

 

             
  

#include<htc.h>

#define TRUE 1
#define FALSE 0

bit LED=P1^2;
void delay(void);//50us delay;
    
static void delay1(void){//set up for 1ms delay
    char c;
    for(c=0;c<20;c++){
    delay();
    }
    }

bit On_Off=P1^0;//On-Off switch on P1^0//(Starts device)

//function to see if switched is pressed
bit SwitchOn_Off(void);

//50ms debounce function
void debounce (void);

//function to count the pulses received on the timer input pins(T0 and T1)
void Pulsecount(void);
void delay(void);//50us delay;

void main (void){

while (TRUE){

    if (SwitchOn_Off()==TRUE){
    LED=0;

    Pulsecount();//initiate count

}
    else{}//do nothing

}
}

bit SwitchOn_Off(void){

    if(On_Off==FALSE){//If switched is closed(0)
        debounce();//carry out switch debounce(delay Procedure)
        return TRUE;//Returns TRUE to allow operation to carry on
    }
        return FALSE;//function returns a FALSE
    }

void debounce (void){

TL0=0xb0;
TH0=0x3c;
TMOD=0x01;
TR0=1;
TF0=0;
/*sets timer0 as interval timer and loads the decimal value
15536 in to it;;leading to it being incremeneted 50000 times
before it overflows;;ie TF=1(50ms)*/
while (TF0==FALSE){}
    TR0=FALSE;
    TF0=FALSE;
    }

void Pulsecount(void){

while(TRUE)
    
    T0=1;//set T0 as input pin(therefore increments Timer0 as pulse goes from low to high
    T1=1;//set T1 as input pin(therefore increments Timer1 as pulse goes from low to high

    TMOD=0x55;//sets Timers in 16bit interval timer mode
    
    //clear any values in timers
    TH1=0;
    TL1=0;
    TH0=0;
    TL0=0;

    TR1=TRUE;//start timer1
    TR0=TRUE;//start timer0
    delay1();
    TR1=FALSE;
    TR0=FALSE;

}

 void delay (void){
 char c;
 for(c=0;c<16;c++);//50us delay
 }
 
 

 

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