CCS C Software and Maintenance Offers
FAQFAQ   FAQForum Help   FAQOfficial CCS Support   SearchSearch  RegisterRegister 

ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

CCS does not monitor this forum on a regular basis.

Please do not post bug reports on this forum. Send them to CCS Technical Support
Question about ext_int_edge use !
Goto page Previous  1, 2
 
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion
View previous topic :: View next topic  
Author Message
Andrew83



Joined: 16 Sep 2008
Posts: 51

View user's profile Send private message Send e-mail

PostPosted: Tue Feb 10, 2009 8:28 am     Reply with quote
Here is today's code :

Code:


#include <18f452.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=10000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)

#define tsop   pin_b0
 char buffer[10];
 char bitnumber;
 int1 val_complete;
 
 
#int_ext                              //IR bits detected by edge triggering
void ext_isr()  {
   
   clear_interrupt(INT_TIMER1);   //clear interrupt flag
   enable_interrupts(INT_TIMER1); // enable intrerupere timer1
   set_timer1(62786);             // overflow in 1,1 ms
   disable_interrupts(int_ext);   //adio intrerupere la edge
   bitnumber=10;
   }

#int_timer1
void timer1_isr() {
 
   set_timer1(61061);        // overflow in 1,790 ms
   if (input(TSOP))
       buffer[bitnumber]='1';
   else
       buffer[bitnumber]='0';
       
   if (--bitnumber==0) {
       disable_interrupts(INT_TIMER1); //adio intrerupere timer1
       clear_interrupt(INT_EXT);       //clear interrupt flag
       enable_interrupts(int_ext);     //enable intrerupere la edge
       val_complete=true;
       }
}       

void main() {

setup_timer_1(t1_internal|t1_div_by_1);
ext_int_edge(0,H_to_L);                //falling edge
enable_interrupts(int_ext);            //enable external interrupt
enable_interrupts(global);             //enable interrupts

while(1) {
 
   if (val_complete)
   {
     val_complete=false;
     printf("%s",buffer);
   }
}
}

Andrew83



Joined: 16 Sep 2008
Posts: 51

View user's profile Send private message Send e-mail

PostPosted: Tue Feb 10, 2009 8:35 am     Reply with quote
The output for printf("%s",buffer); is :

Code:


PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
PPPPPPPPPPPPPPPP


And for printf("%c",buffer); is :

Code:


BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0
BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB0BB
0BB0BB0BB0BB0BB0BB0BB0BB0BB0
Andrew83



Joined: 16 Sep 2008
Posts: 51

View user's profile Send private message Send e-mail

PostPosted: Tue Feb 10, 2009 8:37 am     Reply with quote
Here is the transmitter code :

Code:


#include <16f877.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=10000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)

char slave_cmd[10]={'1','1','1','0','1','0','1','0','1','0'};
//char slave_cmd[10]={'1','0','1','0'}; //debug



//=============================================================================
void check_for_SLAVE(void) {
 char i;
  output_high(pin_e1);
  delay_ms(2);
  for(i=0;i<9;i++)
   {
    if (slave_cmd[i]=='0')
      {
        output_high(pin_e1);
        delay_us(900);
        output_low(pin_e1);
        delay_us(900);
      }
      else
      {
        output_low(pin_e1);
        delay_us(900);
        output_high(pin_e1);
        delay_us(900);
      }
   }
   
  output_high(pin_e1);
  delay_ms(100);
}

//==========================================
void main() {
   
   //--------------------------------------------------
   setup_timer_1(t1_internal|t1_div_by_1);
   ext_int_edge(0,h_to_l);
   enable_interrupts(int_ext);
   enable_interrupts(INT_RTCC);
   enable_interrupts(GLOBAL);
   
   while(1)
   {
   check_for_SLAVE();
   }
 
}

Andrew83



Joined: 16 Sep 2008
Posts: 51

View user's profile Send private message Send e-mail

PostPosted: Tue Feb 10, 2009 9:52 am     Reply with quote
Ok...so i've modified the timer1 ISR by including the second IF statement in the ELSE of the first, and i get over the serial "10 80 41 02" in hex over and over again..but this time, only when i transmit iR data.

Still no luck in decoding the data transmitted. Sad

Code:

#int_timer1
void timer1_isr() {
 
   set_timer1(61061);        // overflow in 1,790 ms
   if (input(TSOP))
       buffer[bitnumber]='1';
   else
      {
      buffer[bitnumber]='0';
       
   if (--bitnumber==0) {
       disable_interrupts(INT_TIMER1); //adio intrerupere timer1
       clear_interrupt(INT_EXT);       //clear interrupt flag
       enable_interrupts(int_ext);     //enable intrerupere la edge
       val_complete=true; }
      }
}       
Ttelmah
Guest
PostPosted: Wed Feb 11, 2009 3:31 am     Reply with quote
Unfortunately, _you_ need to start thinking...
Now (for example), you are blithely trying to print outputs, without checking if what you are sending is useable with the output format instructions.
Is 'buffer' a character (which is what %c expects). No. It is the address of a character.
Is 'buffer' a string (which is what %s expects). No. Strings in C, require termination. Where is the space for this?. Are you terminating it?.....

People here will _help_ you, but not write eveerything for you. Your code has basic faults, which are nothing to do with reading the IR stream.

Best Wishes
Display posts from previous:   
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion All times are GMT - 6 Hours
Goto page Previous  1, 2
Page 2 of 2

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group