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AcquaVx



Joined: 02 Jun 2006
Posts: 6

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PostPosted: Mon Jun 12, 2006 10:41 am     Reply with quote
Hi all !

My question is certainly pretty stupid.

I'm using CCS 3.242 and a PIC18F2520.

The microcontroller is communicating with a WiFi device and a RFID device. The WiFi works fine.
Regarding the RFID, I have to send a particular message to tell him "Send me the ID on any tags you may find".
The request packet sent to the RFID device is composed of 1 even parity bit, 1 stop bit, 8 bits of data at 9600 bps. Therefore :

Code:
#use rs232(baud=9600,parity=E,xmit=PIN_C6,rcv=PIN_C7,bits=8,stream=RFID)     //UART PIC � RFID


The request packet I'd like to send is :

0x05+0xFF+0xAC+0x80+0xD6

I'm trying to send it to the RFID device. How should I do it ? I've tried :

Code:
enum trame_type
{
   autoanswer = 0x05+0xFF+0xAC+0x80+0xD6, // R�ponse automatique du lecteur RFID vers le microcontr�leur
   period = 0x06+0xFF+0xAD+0x01+0x00+0x55, // P�riode d'activation du lecteur RFID
   a=0x05,
   b=0xFF,
   c=0xAC,
   d=0x80,
   e=0xD6,
};



and :

:: puts("0x05+0xFF+0xAC+0x80+0xD6",RFID);
:: fputs(autoanswer,RFID);
:: fprintf (RFID, "0x05+0xFF+0xAC+0x80+0xD6");
:: fprintf (RFID, autoanswer);

and finally :

Code:
 char temp_TTL[]="";

   strcpy(temp_TTL,a);
   strcat(temp_TTL,b);
   strcat(temp_TTL,c);
   strcat(temp_TTL,d);
   strcat(temp_TTL,e);

   fputs(temp_TTL,RFID);


None of this works.

Thank you for your suggestions, if any : )

Bye Very Happy
newguy



Joined: 24 Jun 2004
Posts: 1909

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PostPosted: Mon Jun 12, 2006 10:52 am     Reply with quote
I'm about 99% sure about this:

Code:
putc(0x05);
putc(0xff);
putc(0xac);
putc(0x80);
putc(0xd6);


The 1% unsure being that I can't remember using putc() before. Something to try anyway.
Humberto



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

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PostPosted: Mon Jun 12, 2006 11:53 am     Reply with quote
fprintf (RFID, "%x%x%x%x%x",0x05,0xFF,0xAC,0x80,0xD6);
fprintf (RFID, "%x%x%x%x%x%x",0x06,0xFF,0xAD,0x01,0x00,0x55);

or if the '+' is needed:

fprintf (RFID, "%x+%x+%x+%x+%x",0x05,0xFF,0xAC,0x80,0xD6);
fprintf (RFID, "%x+%x+%x+%x+%x+%x",0x06,0xFF,0xAD,0x01,0x00,0x55);

or

fputc(0x05, RFID); fputc('+', RFID);
fputc(0xFF, RFID); fputc('+', RFID);
fputc(0xAC, RFID); fputc('+', RFID);
..........................

Humberto
treitmey



Joined: 23 Jan 2004
Posts: 1094
Location: Appleton,WI USA

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PostPosted: Mon Jun 12, 2006 12:36 pm     Reply with quote
I thought he might need to send the hex
fprintf (RFID, "%c%c%c%c%c",0x05,0xFF,0xAC,0x80,0xD6);
or the putc will work
AcquaVx



Joined: 02 Jun 2006
Posts: 6

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PostPosted: Wed Jun 14, 2006 12:56 am     Reply with quote
Thank you guys. I'm getting results.

Enjoy the day : )
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