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simple Time display problem

 
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simple Time display problem
PostPosted: Thu Jan 04, 2007 3:11 am     Reply with quote
Hi i built small time display but iam facing a problem with AM/PM allthing allright when hour become over 12 it's going AM but After 1 it goes PM
Here's the code

Code:
#include<16f876a.h>
#use delay (clock=20000000)
#include "lcd.c"
#fuses HS,nowdt
int sek=0,min=53,hour=10;
//--------------------------//
void main()
{
while(true){
delay_ms(1000); // Time
printf(lcd_putc,("\f"));
printf(lcd_putc, " %2u",hour);
printf(lcd_putc,(":"));
printf(lcd_putc, "%02u",min);
printf(lcd_putc,(":"));
printf(lcd_putc, "%02u",sek);
sek++;
If(sek>59){
sek=0;
++min;}
if(min>59){
min=0;
++hour;}
if(hour>12)
hour = 1;
If(hour>11)
printf(lcd_putc, " AM");
else
printf(lcd_putc, " PM");
}
}
davekelly



Joined: 04 Oct 2006
Posts: 53
Location: Berkshire, England

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PostPosted: Thu Jan 04, 2007 3:52 am     Reply with quote
You need an extra flag to track whether it is Am or Pm, which gets toggled every 12 hours

eg

Code:

#include<16f876a.h>
#use delay (clock=20000000)
#include "lcd.c"
#fuses HS,nowdt
int sek=0,min=53,hour=10;
//--------------------------//
void main()
{
   int1 AmPm;

   while(true)
   {
      delay_ms(1000); // Time
      printf(lcd_putc,("\f"));
      printf(lcd_putc, " %2u",hour);
      printf(lcd_putc,(":"));
      printf(lcd_putc, "%02u",min);
      printf(lcd_putc,(":"));
      printf(lcd_putc, "%02u",sek);
      sek++;
      If(sek>59)
      {
         sek=0;
         ++min;
      }

      if(min>59)
      {
         min=0;
         ++hour;
      }

      if(hour>12)
      {
         hour = 1;
         AmPm = !AmPm
      }

      If(!AmPm)
      {
         printf(lcd_putc, " AM");
      }
      else
      {
         printf(lcd_putc, " PM");
      }
   }
}
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