How to compare strings/array? RFID Project

[astanapane]

The attached file shown what i need to do with the ID-12 and the pic16f628a.

I will seperate those in two circuits.

The first circuit will read and identify the RFID cards and the second circuits will be based on the 3x4 keypad.

Once you pass the rfid card from the ID-12 the circuit will check if the card is valid or not.

If it is valid then will proceed and display your name. If not then you will need to go back and check card again.

Once you are accepted from the system then you only have 5 seconds to open the door. You will need to type your 4 digit code in order to open the door.

[astanapane]

hello all again,

i just received the RFID module 12 from sparkfun.

I test the serial usb device with Secure CRT and works fine.

Now i'm building the circuit and the code.

As i told you i would like to make a code that can display the name of the holder according to the ID of the RFID tag.

I havent connect the ID-12 yet because the dimensions of the pins are not much to the standard ones. I will make a pcb this afternoon and then i will try to make a schematic.

Now i have attached the code i have done so far, copied most of it from the people here in forum.

CMCON = 7   
DEFINE OSC 4	'Set oscillator in MHz

DEFINE LCD_DREG PORTB  'define port to LCD
DEFINE LCD_DBIT 4      'RB4 RB5 RB6 RB7 display
DEFINE LCD_RSREG PORTA 'RS on porta
DEFINE LCD_RSBIT 0     'RS on porta.0
DEFINE LCD_EREG PORTA  'Enable on porta
DEFINE LCD_EBIT 1      'Numero Enable  porta.1
DEFINE LCD_BITS 4      ' 
DEFINE LCD_LINES 2     'lines 2 
PAUSE 200                                   ' Stop 200ms
LCDOUT $FE,1                              'clear
Lcdout $FE,1,4                                
' -----[ Variables ]-------------------------------------------------------

buf	    VAR	Byte(12)' RFID bytes buffer
tagNum	VAR	Byte	' from EEPROM table
idx	    VAR	Byte	' tag byte index
char	VAR	Byte	' character from table

' -----[ EEPROM Data ]-----------------------------------------------------

Tag1	DATA	"450052B6BC1A"
Tag2	DATA	"450052F2EB0A"


' -----[ Initialization ]--------------------------------------------------

HIGH portb.1	' turn off RFID reader portb.1 is the reciever port
LOW portb.2	    ' lock the door!
Low portb.3	    ' Turn off LED
' -----[ Program Code ]----------------------------------------------------

Main:

LOW portb.1					    ' activate the reader
SERIN2  portb.1, 396, [WAIT($0A)] ' STR buf\12]	' wait for hdr + ID
HIGH portb.1					' deactivate reader

Check_List:
  FOR tagNum = 1 to 2				' scan through known tags
    FOR idx = 0 TO 11				' scan bytes in tag
    READ (((tagNum-1) * 12) + 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

Bad_Tag:
  tagNum = 0
  FREQOUT porta.3, 1000 */ $100, 115 */ $100	' groan
  PAUSE 1000
  GOTO Main

Tag_Found:

IF tagNum = 1 then displayName1

IF tagNum = 2 then displayName2

GOTO Main

displayName1:
lcdout $FE, 1,"NAME for tag 1"    'assuming your display is on porta.0 @ 9600 baud
pause 500                                      'Pause ,5 sec then clear display
goto open_door

displayName2:
lcdout $FE, 1,"Name for tag 2"    'assuming your display is on porta.0 @ 9600 baud
pause 500                                        'Pause ,5 sec then clear display
goto open_door

open_door:
  HIGH portb.2					' remove latch
  High portb.3					' Light LED
  FREQOUT porta.2, 2000 */ $100, 880 */$100	' beep
  LOW portb.2					' restore latch
  Low portb.3					' LED OFF
  GOTO Main

i would like to know if i can use the command serin2 on the pin portb.1 on the pic16f628a in order to read the data.

I know that the code may have a lot of mistakes but as i told you i'm not a programmer and i try to make it as good as i can.

I only need a little bit of your help in certain points that you sure know better than me.

thank you all for your help in advance.

[astanapane]

hi all,

i did some small changes and read data on 9600.

But i cannot make it work yet.

When i pass the TAG from the reader does not display the name.

It displays 'Bad Dag' only. And the tag is the valid one i pass from the reader.

Could you please help me with my program?

I have tags from Sparkfun that i believe are with 12 digits so i think we need to make some changes there.

here is the code:

@ DEVICE PIC16F628A      

CMCON = 7   
DEFINE OSC 4	'Set oscillator in MHz

DEFINE LCD_DREG PORTB  'define port to LCD
DEFINE LCD_DBIT 4      'RB4 RB5 RB6 RB7 to D4 D5 D6 D7 display
DEFINE LCD_RSREG PORTA 'RS on porta
DEFINE LCD_RSBIT 0     'RS on porta.0
DEFINE LCD_EREG PORTA  'Enable on porta
DEFINE LCD_EBIT 1      'Numero Enable  porta.1
DEFINE LCD_BITS 4      ' 
DEFINE LCD_LINES 2     'lines 2 
PAUSE 200                                   ' Stop 200ms
LCDOUT $FE,1                                ' Åíåñãïðïßçóå ôï LCD
Lcdout $FE,1,4
lcdout $FE, 1," Leonardo"
pause 500
' -----[ Variables ]-------------------------------------------------------

buf	    VAR	Byte(12)' RFID bytes buffer
tagNum	VAR	Byte	' from EEPROM table
idx	    VAR	Byte	' tag byte index
char	VAR	Byte	' character from table

' -----[ EEPROM Data ]-----------------------------------------------------

Tag1	DATA	"450052B6BC1D"
Tag2	DATA	"450052F2EB0E"


' -----[ Initialization ]--------------------------------------------------

high portb.1	' turn off RFID reader portb.1 is the reciever port
LOW portb.2	    ' lock the door!
Low portb.3	    ' Turn off LED

' -----[ Program Code ]----------------------------------------------------

Main:
high portb.3
low portb.1					    ' activate the reader
SERIN2 portb.1, 84, [WAIT($0A)] ' STR buf\12]	' wait for hdr + ID
high portb.1					' deactivate reader
pause 500
 
Check_List:
  FOR tagNum = 1 to 2				' scan through known tags
    FOR idx = 0 TO 11				' scan bytes in tag
    READ (((tagNum-1) * 12) + 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

Bad_Tag:
  tagNum = 0
  high porta.3
  pause 200
  low porta.3
  pause 200
  lcdout $FE, 1," bad tag"
  pause 500
  FREQOUT porta.3, 1000 */ $100, 115 */ $100	' groan
  PAUSE 1000
  lcdout $FE,1
  GOTO Main

Tag_Found:

IF tagNum = 1 then displayName1

IF tagNum = 2 then displayName2

GOTO Main

displayName1:
lcdout $FE, 1,"ASTANAPANE"    'assuming your display is on porta.0 @ 9600 baud
pause 500                                      'Pause ,5 sec then clear display
goto open_door

displayName2:
lcdout $FE, 1,"TIGRI"   	'assuming your display is on porta.0 @ 9600 baud
pause 500                                       'Pause ,5 sec then clear display
goto open_door

open_door:
  HIGH portb.2					' remove latch
  High portb.3					' Light LED
  FREQOUT portb.3, 2000 */ $100, 880 */$100	' beep
  LOW portb.2					' restore latch
  Low portb.3					' LED OFF
  GOTO Main

[astanapane]

hi all again,

i try to see what the problem is.

I think there might be a problem on storing data to EEPROM of the pic16f628a...

and there also be a problem somewhere on the code...

Main:
high portb.3
low portb.1					    ' activate the reader
SERIN2 portb.1, 84, [WAIT($0A)] ' STR buf\12]	' wait for hdr + ID
high portb.1					' deactivate reader
pause 500
 
Check_List:
  FOR tagNum = 1 to 2				' scan through known tags
    FOR idx = 0 TO 11				' scan bytes in tag
    READ (((tagNum-1) * 12) + 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!

when i try to pass the card from the reader it light the led of the reader but nothing happens to my LCD.

then i pass second time the card from the reader the led on the porta.3 light up and i get on my lcd the Error tag.

I dont understand what is happening on the first time that i pass the card. It doesnt do anything.

Why when i pass it two times i have bad tag on the display.

On other thing is that i cannot make it work to show me the name on the display on the right cards.

If you have any solutions please help me.

regards

[Archangel]

Just countin beans here:

buf        VAR    Byte(12)' RFID bytes buffer

I think should read

buf        VAR    Byte[12]' RFID bytes buffer

I am looking for other issues

[astanapane]

Thank you Joe,

i will make the change in the afternoon, then i will check and let you know.

Your help is much apreaciated.

Best Regards,

[astanapane]

i have changed the () with this [] but didnt work.

something else is the mistake and i cannot understand.

When i pass the tag from the reader doesnt do anything, but i pass it twice then i get the bad tag on the display.

It seems that doesnt recongise the tags i gave to the program.

somthing has to do with this line

SERIN2 portb.1, 84, [WAIT($0A), STR buf\10] 'the number 10 here is the 9600???

i cannot understand this line could you help?

FOR idx = 0 TO 11 ' here is it ok this line if my RFID tags have 12 digits?
READ (((tagNum-1) * 10) + idx), char ' this line is chineese to me. what is the number 10 in there? What number should i put if my RFID tags have 12 digits?