How to compare strings/array? RFID Project

[dan-tron]

I am trying to make an RFID reader using Parallax's RFID Reader Module and a PIC 16F628A.
I am using PBP and am having troubles figuring out how to convert over the sample code found at Parallax to work in PBP.
Sample code: http://www.parallax.com/dl/src/prod/RFID1.BS2

The main trouble I am having is getting the comparison to work. I'm not sure what the best way would be to compare the scanned RFID 10 byte string array against a set of known tags.
Below is the part of the code I believe is not working right.
Does anybody have any idea on what I can do to fix this or perhaps someone has a better way of doing it? Thanks in advance!
-Dan

' -----[ EEPROM Data ]-----------------------------------------------------
Tag1 DATA "100050D77C" ' valid tags
Tag2 DATA "1000504B02"
Tag3 DATA "1000502DC9"
Tag4 DATA "100050803A"
Tag5 DATA "100050C472"

' -----[ Program Code ]----------------------------------------------------
Main:
LOW portb.3 ' activate the reader
SERIN2 portb.2, T2400, [WAIT($0A), STR buf\10] ' wait for hdr + ID
HIGH portb.3 ' deactivate reader

Check_List:
FOR tagNum = 1 TO LastTag ' scan through known tags
FOR idx = 0 TO 9 ' scan bytes in tag
READ (tagNum - 1 * 10 + idx), char ' get tag data from table
IF (char <> buf(idx)) THEN Bad_Char ' compare tag to table
NEXT
GOTO Tag_Found ' all bytes match!
Bad_Char: ' try next tag
NEXT

[Darrel Taylor]

Try using 396 instead of T2400 in the SERIN2 statement.

Constants like T2400 are only for SERIN (without the 2).
<br>

[dan-tron]

No luck. I replaced the T2400 with 396 and it made no difference. I don't believe that the serial input is the problem because I can debug with a serial LCD and I can get it to print the actual RFID tag numbers on the LCD. The problem seems to lie under Check_List:. Specifically the line...
READ (tagNum - 1 * 10 + idx), char ' get tag data from table

I've never saved anything to EEPROM before. Maybe its not reading it correctly? Or saving it?

[Robson]

Can you post your complete code?
I have to understand what are you´re trying to do.

regards Rob

[dhouston]

You might try using WRITE to store the data. That might isolate the problem to your DATA or READ statements.

[Robson]

Maybe this one will help you.
I don´t try before working with SERIN2 but give it a try. You can change this part with storing data to eeprom too. It´s only to see how to realize that, if i´m not wrong.
To store data on eeprom use
DATA @$00,$D7,$7C,$4B,$02,$2D,$C9,$80,$3A,$C4,$72

Loop      VAR BYTE
ReadTag   VAR BYTE[2]
ConvTag   VAR WORD
Tag       VAR WORD[5]

Tag(1) = $D77C
Tag(2) = $4B02
Tag(3) = $2DC9
Tag(4) = $803A
Tag(5) = $C472

' -----[ Program Code ]----------------------------------------------------
Main:

LOW PORTB.3 ' activate the reader
SERIN2 PORTB.2, T2400, [WAIT($0A,"100050"), STR ReadTag\2]
HIGH PORTB.3 ' deactivate reader

Check_List:
ConvTag = ReadTag(0)*$100 + ReadTag(1)
FOR Loop = 1 to 5
    IF ConvTag = Tag(Loop) THEN Tag_found
NEXT Loop 
GOTO Bad_Char

Bad_Char: ' try next tag
'....
'....
GOTO main

Tag_Found: