NEED HELP, PLEASE!! - FUNCTION NOT BEEN CALLED

[asjad]

MPLAB 6.5
PCM V 3.186
MPLAB ICD2

Dear All,

I am in a rut can someone help me please!!!

I HAVE CODED A SIMPLE CLOCK PROGRAM, ThE ACTUAL INCREMENTATION of mins/hours/milli WORKS PERFECT

BUT WHEN I TRY TO CALL THE DISPLAY FUNCTION WITHIN THE ISR() it simply ignores the call

NO COMPILER ERRORS!!!!!!!!

code =
------------------------------------------------------------------------------
#if defined(__PCM__)
#include <16F874.h>
#device ICD=TRUE
#fuses XT,NOWDT,NOPROTECT,NOLVP,PUT,NOBROWNOUT
#use delay(clock=4000000)
#endif

#include <lcd.c>

void display(void);

#bit t0if = 0xb.2


int sec=0; //second
int min=0;//minute
int hrs=0; //hour
int milli=0;
int increment = 0;

char data[16];

#int_rtcc
void clock()
{
increment++;
if (increment==2)
{ milli++;
increment=0;
}
if (milli==10) // 10*100ms = 1second passed
{
sec++;
milli=0;
}
if (sec==60) // 60*1sec = minute
{
sec=0;
min++;
display();
}
if (min==60)
{
min=0;
hrs++;
display(); THIS FUNCTION WILL NOT CALL
}

if ((hrs==24) || (hrs && min==0))
{
sec=0;
hrs=0;
display(); //THIS FUNCTION WILL NOT CALL
}
if (milli < 10) //milli lower than 10 exit after incrementing milli
set_RTCC(60); //setup TMR0 to count upto 100ms

}
void display(void)
{
lcd_init();
if (t0if==TRUE)
{
lcd_gotoxy(0,1);
printf(lcd_putc,"%02U:%02U",hrs,min);
}
else
{
lcd_gotoxy(1,1);
printf(lcd_putc,"%S",data);
}
}






void main()
{

enable_interrupts(int_RTCC);
enable_interrupts(GLOBAL);

setup_counters(RTCC_INTERNAL,RTCC_DIV_256);

set_RTCC(60);





}
_________________
Best Regards

[future]

Try to set a flag in ISR and in main loop call this LCD function.

[asjad]

The function of the code is a "real time clock"

Within the ISR I call a function called "display()", this function updates the time on the LCD using the standard CCS drivers.

When I step throught the code the system seems to ignore the call to the display function all together.

The ISR is working as I can see the variables min, hour, milli being incremented as a real time clock.

NO COMPILER ERRORS

I thankyou in advance for advising me!
_________________
Best Regards

[asjad]

If I try to call the fucntion from function main, it will still not branch

Is the compiler version bug free?
_________________
Best Regards

[rwyoung]

You should not call code like "printf" from inside ISRs. Two reasons, one is it takes too long to execute and second is that printf is not re-entrant.

Set a flag inside your ISR indicating there is new data to print or keep a phantom copy outside the ISR and test for new data in your main.

[Guest]