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HI-TECH translate

 
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Saratoga



Joined: 18 Jan 2006
Posts: 9

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HI-TECH translate
PostPosted: Wed Feb 27, 2008 8:53 am     Reply with quote
Hi.I need translate this code from hi-tech compiler to CCS.Is a timer interrupt????Thanks
Code:

void interrupt isr(void)
{

   if (TMR1IF==1)
   {
      counter++;
      if (counter==keepalive)         //131 ms * counter keep_alive
      {
         //Go away I'm keep aliving

         counter=0;

         //CODE
}
      TMR1IF=0;
   }
}

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Humberto



Joined: 08 Sep 2003
Posts: 1215
Location: Buenos Aires, La Reina del Plata

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PostPosted: Wed Feb 27, 2008 9:39 am     Reply with quote
Yes, it is an -open- TMR1 interrupt handler. Cool

All you need is to define how to access TMR1IF. In most 16F series, it is the Bit0 of the
PIR1 Reg.
Credit to Mark who posted an alternative header with all the byte and bits definitions for
most 16F devices using union and structs. In this way it is possible to access a single
bit within a Register.

Code:

unsigned char PIR1;
#locate PIR1=0x0C

struct {
    unsigned char TMR1IF:1;
    unsigned char TMR2IF:1;
    unsigned char CCP1IF:1;
    unsigned char SSPIF:1;
    unsigned char TXIF:1;
    unsigned char RCIF:1;
    unsigned char ADIF:1;
    unsigned char PSPIF:1;
} PIR1bits ;
#locate PIR1bits=0x0C


Humberto
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Feb 27, 2008 12:41 pm     Reply with quote
Here is the translation to CCS:
Code:

#int_timer1
void timer1_isr(void)
{
 counter++;

 if(counter == keepalive)   
   {
    counter=0;
   }

}

Don't put in any code for the TMR1IF flag. CCS handles it for you.
Saratoga



Joined: 18 Jan 2006
Posts: 9

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PostPosted: Thu Feb 28, 2008 1:29 am     Reply with quote
Huooo .OK..

"if (TMR1IF==1)" is only for HI-tech.
It s 131ms timer x counter. I understand now.
Thanks to all.

The program is the ELM323 OBD chip firmware.
http://www.obdchip.com/node/20. I translate definitions code to CCS(gracias humberto XD).
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