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CCP Help needed
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anandpv2009



Joined: 26 Jul 2009
Posts: 31

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PostPosted: Thu Nov 05, 2009 7:14 am     Reply with quote
Here is my CODE Not for finding distance, as beginning just display the ccp1 reg value.

Code:

#include <18F2550.h>
#fuses HSPLL,NOWDT,NOPROTECT,NOLVP,NODEBUG,USBDIV,PLL5,CPUDIV1,VREGEN
#use delay(clock=20000000)
#include <lcd.c>

BOOLEAN tj=false;
#int_ccp1
void calc()

{   

   static int32 val;
   int32 cv;
   clear_interrupt(INT_CCP1);
   if(tj == false)
   {
   val = get_timer1();
   tj = true;
   }
   else
   {
   cv = ccp_1;
   printf(lcd_putc,"\f%ul",cv);
   }    
}




void main()
{
int a=0,b=0;
set_timer1(0);
setup_timer_1(T1_INTERNAL);
setup_ccp1(CCP_CAPTURE_FE);

clear_interrupt(INT_CCP1);
enable_interrupts(INT_CCP1);
enable_interrupts(GLOBAL);

lcd_init();
delay_ms(100);
printf(lcd_putc,"Range Meter");
delay_ms(500);

   while(1)
   { 
       
      set_timer1(0);
      tj = false;
    interrupt_active(INT_CCP1);
                for(a=255;a=0;a--){
         output_high(pin_c1);
         delay_us(12);
         output_low(pin_c1);
         delay_us(12); }
      
      delay_ms(500);
      
      
      
   }
}



The Value in ccp reg. varies randomly.
Now i am going to change my hardware for using the circuit developer's HEX.
Jerson



Joined: 31 Jul 2009
Posts: 126
Location: Bombay, India

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PostPosted: Thu Nov 05, 2009 9:35 am     Reply with quote
http://www.micro-examples.com/public/microex-navig/doc/090-ultrasonic-ranger

shows a simpler example of how-to sonar
_________________
Regards
Jerson Fernandes
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