How to compare strings/array? RFID Project

Not to be sorry . . . I just do not want to trip you up in your pursuit of life
all that said make sense of this

Code:

---


' Define LCD registers and bits as 4 bit
Define  LCD_DREG        PORTB        ' port b handling the data
Define  LCD_DBIT        4                ' Data bits begin on PortB.4 generally must use consecutive ports starting with 0 or 4
Define  LCD_RSREG      PORTA        ' R/S bit on portA
Define  LCD_RSBIT      0                ' Defined as PortA.0
Define  LCD_EREG        PORTA        ' E Bit defined as PortA
Define  LCD_EBIT        1                ' Ebit set to PortA.1

DEFINE LCD_LINES 4            'Define using a 2 line LCD
DEFINE LCD_COMMANDUS 2000    'Define delay time between sending LCD commands
DEFINE LCD_DATAUS 50        'Define delay time between data sent.
DEFINE OSC 20


lcdout $FE,1    ' Clear LCD
lcdout $FE,2,  "  Copyright 2006    " '
lcdout $fe,$C0,"This is my text"  '

---

This is a cut/paste from a project Darrel really helped a lot on,(DID MOST OF) a serial backpack lcd controller.
The defines tell the pic which pins are working the LCD
$FE1 clears the LCD
$FE2 moves cursor to #1 position
$FE,$C0 moves the cursor to another line, my book is not handy right now
Keep in mind a 4X20 LCD is electrically in reality a 2X40 that is chopped in half and stacked so the beginning of line 2 is post 41? and the beginning of line 3 is 21, or something to that effect.
Check out the project at http://www.picbasic.co.uk/forum/cont...rial-backpacks

Oh and BTW , NOBODY hates school more than Me. I totally get it. I still on occasion have to go back and take classes
just because I want to learn what they are teaching, and I still hate it!

Dear All,

first of all i would like to thank all of you for any help on my next week try.

As i told you i'm waiting next week to receive the ID-12 RFID module and the RFID chips.

I have a display and a pic16f628a here with me. I would like before i start to make first some steps in order everyone in the future to have it as a guidance.

The project is based on the RFID. So this will be the INCOMING information from an RFID chip.

The componets are going to be used are as follows. (sorry that i provide you the sparkfun but i ordered all mine from there exept the pic)

1) PIC16f628a
2) ID-12 RFID module http://www.sparkfun.com/products/8419
3) RFID reader, you need this to read the IDs from the tags in order to use them on the programm (http://www.sparkfun.com/products/8852)
4) tag (http://www.sparkfun.com/products/9417) you can use any at 125khz
5) 16x2 Character LCD - White on Black 5V http://www.sparkfun.com/products/709

these are the core components we need. Once i make the schematic and the program i will provide all the info you might need.

So now what is the thought.

1) to be able to open the door using an RFID tag.
2) the rfid tag might be unique and stored in an eeprom
3) once we pass the tag from the ID-12 module the pic will recognise the ID of the tag and display on the 16x2 the Name of the carrier.
4) after the Displayed name (0,5 seconds) the door will open.
5) there we need to clear everything and be ready to use an other tag.

Now We need to think to use the 16x2 display and the RFID module with the same pic.

1) From my point of view i need for the display 6 ports reserved from the PIC. (see attached file)

we also need to give the above code at the beggining of our program in order to specify the parameter of the display.

DEFINE LCD_DREG PORTB
DEFINE LCD_DBIT 4
DEFINE LCD_RSREG PORTB
DEFINE LCD_RSBIT 2
DEFINE LCD_EREG PORTB
DEFINE LCD_EBIT 3
DEFINE LCD_BITS 4
DEFINE LCD_LINES 2

2) then we also need for the ID-12 to reserved some pins from the pic ports but i dont know which ones. ( here i need some help) According to the attached file i would like to tell me how which pins from the ID-12 i need to connect to pic.

Once we know how many reserved pins we have then we share and seperate those pins to input from the ID-12 and output for the 16x2 lcd.

i will keep you updated with the code that i will try to write next week. Please let me know if anyone is able to help on this. I will be fololwing the code is already written here from all of you.

Best Regards,

astanapane.

Joe,

thank you a lot, hehehe i think we did post the same time.

Hope you'll be here and help me out next week. I will start very simple and then we can improve everything accordinally.

Best Regards

some more questions.

I guess that with the following format for the LCD


DEFINE LCD_DREG PORTB
DEFINE LCD_DBIT 4
DEFINE LCD_RSREG PORTB
DEFINE LCD_RSBIT 2
DEFINE LCD_EREG PORTB
DEFINE LCD_EBIT 3
DEFINE LCD_BITS 4
DEFINE LCD_LINES 2

i can only use the LCDOUT command and not the SEROUT2.

In case that i use for the pic16f628a the RB0 for the RFID READER then for the LCD can i use PORTA?

Then i would need also some help in the command to transfer it from the following

Serout2 porta.0,84

to the LCDOUT.

The LCDs are parallel LCD. I have seen some circuits using shift registers to adapt then to accept, or use the serial backpack you will find in the article section and serout / serout2 / hserout as you choose. It is in the final code, set to accept several baud rates. It does all the LCDOut overhead in it's PIC, freeing you projects PIC of the burden. I listed it before, but here it is again.
http://www.picbasic.co.uk/forum/cont...rial-backpacks

Hi Joe,

thank you, i will try to fix the code before i get the componets, but it a bit difficult without them.

I havent recieve the ID-12 modules yet. So i expect them next week possible on Wednesday.

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.

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.

Code:

---

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.

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:

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

---

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...

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

Just countin beans here:

Code:

---

buf        VAR    Byte(12)' RFID bytes buffer

---

I think should read

Code:

---

buf        VAR    Byte[12]' RFID bytes buffer

---

I am looking for other issues

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,

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?

Quote:

---

Originally Posted by 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?

---

Working from memory here, my book is outside, and I am not dressed to go get it . . .
As I remember the 84 is the Mode setting the baud rate, the buff\10 sets the string state to 10 characters - 0 to 11 would equal 12 characters in your index, so I am thinking your buf\10 should be buf\12 . . .

Hi Joe,

i would also like to specify that the tags i have there are manchester encoding. Do i have to decode it through the program in order to work?

I dont know how to decode it. As from the page here http://www.sparkfun.com/products/10169 these are the features
Features:

EM4001 ISO based RFID IC
125kHz Carrier
2kbps ASK
Manchester encoding
32-bit unique ID
64-bit data stream [Header+ID+Data+Parity]

From what you are saying now:

i have already change the buf/10 to 12 but nothing happens.

If you see the site in here http://melabs.com/resources/ser2modes.htm , there is a 4Mhz which i use at them moment.

There are several numbers in there included the 84. The number 84 seems to read the data at 9600.

Here is an other example of the code http://melabs.com/samples/PBP-mixed/ser2mod.htm

Code:

---

Serin2 pinin,396,[WAIT("F"), STR test8\8]

  Serout2 pinout,396,["14: ",STR test8\8,13,10]  ' 15: 7ZZ-0001

' Waits for the string "F", then collects the next 8 characters.  These are

' stored as ascii in 8 locations of the array variable test8.  The SerOut2

' statement uses the same modifier to send all 8 locations of the array

' variable as an ascii string.

  Serin2 pinin,396,[WAIT("Z",45), STR test8\8\"0"]

  Serout2 pinout,396,["15: ",STR test8\8,13,10]  ' 16: F7ZZ-

' This example demonstrates how you can put multiple characters in the

' WAIT.  It waits for the string "Z-", since the ascii code for "-" is

' 45.  The STR item is the same as above except we have added the stop

' character "0".  When it encounters "0" at the sixth character, it

' replaces it and fills the rest of the test8 array with null characters.
 
  Pause 2000

  Goto mainloop
 
  End

---

I know little to nothing about manchester encoding, I defer to the More Experienced members here, Right now I am still recovering from a hard drive crash, having "unearthed" my computer, I cannot see my bench for the scattered "stuff" ;(, at least the computer is up, except all my PDFs are corrupted.

No problem Joe,

thanks for you help. IF there is anyone else can check the code and give me his advice.

Kind Regards,

There is a ' symbol after the wait that I think should go away. Buffer never gets filled.

Code:

---

SERIN2 portb.1, 84, [WAIT($0A)] ' STR buf\12]        ' wait for hdr + ID

---

Ioannis

Hi Ioannis

i will check that out later today and let you know.

I think i have correct that error but i will check it.

SERIN2 portb.1, 84, [WAIT($0A), STR buf\12]

An other thing that i have in mind is he WAIT($0A),what is that $0A doing?

what is waiting for? is that the first digit of the ID?

(ευχαριστω πολυ)

hi all,

this is my code for your reference....there is somewhere a mistake that cannot find.

Code:

---

@ DEVICE PIC16F628A     
INCLUDE "modedefs.bas"
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          ' power lcd
Lcdout $FE,1,4
lcdout $FE, 1,"  Copyright 2011"
lcdout $FE, $C0,"***********"
pause 2000
lcdout $FE,1
' -----[ 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:
lcdout $FE,1," Please use your"
lcdout $FE, $C0,"      TAG"
pause 500
high portb.3
low portb.1        ' activate the reader
pause 500
SERIN2 portb.1, 84, [WAIT($34),STR buf\12]
pause 500
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
  lcdout $FE, 1,"  invalid TAG"
  lcdout $FE, $C0,"  try again"
  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,"  name_1"   
lcdout $FE, $C0, "ACCESS GRANDED"
pause 1000      'Pause ,5 sec then clear display
goto open_door

displayName2:
lcdout $FE, 1,"  name_2"         
LCDout $FE, $C0," ACCESS GRANDED"
pause    1000    'Pause ,5 sec then clear display
goto open_door

open_door:
  HIGH portb.2      ' remove latch
  pause 500
  LOW portb.2                ' restore latch
  Low portb.3                ' LED OFF
  GOTO Main

---

as i mentioned before, there might be a problem on the following lines.

SERIN2 portb.1, 84, [WAIT($0A),STR buf\12]

what is this value doing in here $0A is that the first digit of the tag?

pause 500
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

what is this value after tagnum -1 is doing? is this the number of the digits of the tag?

IF (char <> buf(idx)) THEN Bad_Char ' compare tag to table

I do not know what the 0A is there for.

It for sure NOT for the ID-12.

In ASCII Hex mode,the ID-12 sends a STX (Start Sentinel) of 02 as the data sheet state.

So no WAIT(0Ah). It will give Bad Tag message.

On the e-mail I sent to you there was an error as I did not read correctly the Data Sheet.

Correct one is the

Code:

---

serin2 port_pin1,baud_rate1,[wait($02),str buf\10]
 
serout2 port_pin2,baud_rate2,[str buf\10,13,10]

---

just to test if the reading data are correct.

Ioannis

for all our knowledge,

i would also like to know if the 12 digits i get from the usb reader, as sparkfun's video on their page...http://www.sparkfun.com/products/8419 is ASCII code.

It is needed first to understand what is this 12 digit number?

Thank you very much for your help. I need also to help you by understanding the basics. then might be easier for you to give me the right instructions.

Quote:

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Originally Posted by Ioannis

I do not know what the 0A is there for.

It for sure NOT for the ID-12.

In ASCII Hex mode,the ID-12 sends a STX (Start Sentinel) of 02 as the data sheet state.

So no WAIT(0Ah). It will give Bad Tag message.

On the e-mail I sent to you there was an error as I did not read correctly the Data Sheet.

Correct one is the

Code:

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serin2 port_pin1,baud_rate1,[wait($02),str buf\10]
 
serout2 port_pin2,baud_rate2,[str buf\10,13,10]

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just to test if the reading data are correct.

Ioannis

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I will make the change to $02 this might solve the problem.

If not then i will try to figure out how to connect it to the computer thought the serial port to see what i get.

Can i do anything with the existing one i have (i mean the usb reader)?

Can i find out from there what the Module is generating?

Because i got consfused. With this reader i get a number throught the Secure CRT program with 12 digits.

Hi,

I have a lot of applications done with RFID. See my web http://www.picshop.nl/rfid.html
Here connected to a AmiPIC18 board with the PIC18F25K20. The firmware is in PICBASIC Pro.

After reading a Tag, the reader give a Hex02. So, you have to wait for that character and store the next 10-byte in a string. Thats the Tag ID. If the first byte = 0, than you have a read only tag. (1 means read/write)
The OEM reader what I use, has a CP signal, this will be high after reading a Tag, then 210ms later, the reader wil send out (9600 baud) the TAG ID. I use in the firmware the CP signal to poll of a Tag is reading or not. The micro is run on 8 Mhz or faster to read 9600baud.

I will post tomorrow some firmware to show hows iets work if you want.

Regards,

Dear Mr. Gevo,

thanks a lot for that. Mr. Ioannis gave me some information in order to start from, read and learn. So i need to read all these info and then i will come back with all my questions.

I think i'm close to fix the problem and make the circuit to work.

At the moment i have use 4Mhz resonator for 9600. Do you think that this might be a problem? I will change it to 8Mhz crystal then.

If the PIC send without any poblem to a PC then its OK for the 4MHz.

I have many times used 9600 on 628 with 4MHz resonator (not crystal) and went smooth.

Ioannis

Why not just use DEBUG for transmit & DEBUGIN for receive?

These commands work 100% with a 4MHz oscillator up to 19200 bps, offer the same modifiers as SERIN2/SEROUT2, and produce much smaller code!

Bruce just cought me. These two commands would be the next step to suggest.

astanapane is struggling with the basics so I did not put him to code changes. Debug need DEFINES declared on top of the code.

Ioannis

Yes that's true,

i will focus at the moment to the basics and then i will try to your suggestions. In first place it is needed to understand the code itself. Then to get the datasheet from the RFID module and check everything in there step by step.

For your info the module ID-12 can be run at 9600 as from the datasheet. The boundrate code for that it seems to work on SERIN2 portb.1, 84. I tried to use the 16468 but didnt do anything.

Regards,

For the Serin2 the 84 is for True RS232 signal. The 16468 is for inverted signal as is the case with the ID-12.

I could not find in the manual where is the speed of the serial port.

Does it clearly state 9600? I found the part that says the signal is inverted and no driver is required.

Ioannis

ok,

I use the OEM 125Khz reader See http://www.picshop.nl/rfid.html

This Reader has a CP signal, Before the 10-byte is serial out, the CP signal will be High. Then I have 210ms time to readout the reader. The PIC in the application is a 16F887.

buf var byte (10) ' RFID bytes from tag

Main:

If PORTA.7 = 0 then Read_Tag ' CP signal of the OEM reader, read within 210 mS

' Here other program lines

Goto Main


' ----- [ GOSUB ] -----------------------------------------------------------

Read_Tag:
' Wait for Hex 02 . . .
serin2 PORTB.0, 84, [WAIT($02), str buf\10] ' Read 10 byte from ECO-125

return

Dear All,

thank you very much for your help. Ioannis helped me out to identify my mistakes on the code and he also gave me the right instructions in order to solve the problem.

i would like also to thanks, Joe, Bruce and Gevo for their support.

Please find attached pictures of my circuit.

now the next and most difficult part is to configure the code for GLCD use.

But i havent seen any library for GLCD. Some users in here have been working for many hours to built a standard code for GLCDs.

the problem is that there would be much better if a library were available from PIC BASIC.

i know and understand that will take place on the pic chip but in nowadays we all using more powerfull pic's.

Regards,

Leonardo

You might find something interesting here
http://www.picbasic.co.uk/forum/show...009#post102009

here you can see a demo of the RFID circuit.

http://www.youtube.com/watch?v=0cp1Y1U_XGk

I need now to improve it with GLCd and Keypad.

i would like to say thanks to Mr. Ioannis for his patient and help.

regards,

Quote:

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Originally Posted by astanapane

I need now to improve it with GLCd and Keypad.

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If this is a one-off (which it appears to be) and price is not an overwhelming obstacle, then look at a serial Graphic LCD such as this one http://www.sparkfun.com/products/9351
Besides writing text, this serial graphic LCD allows the user to draw lines, circles and boxes, set or reset individual pixels, erase specific blocks of the display, control the backlight and adjust the baud rate. It costs $35 and you won't need a GLCD library.

Better yet, this full color TFT has a built-in touch screen so you won't need a keyboard http://www.sparkfun.com/products/10089 - it costs more at $85 and is fully programmable OR can can be controlled with a serial port.

http://www.youtube.com/watch?v=vWKWQ...layer_embedded

hello rmteo,

thanks for your advice.

I dont know about the serial lcd. Can i drive it form a pic18f4550 for example?

Could you give me some instructions? a sample code? I will first use the serial lcd and then i will try the color.

How is the serial GLCD working, and why i dont need a GLCD library? As i see on the serial there is an ATEML chip. I dont know how to programm ATMEL. Sorry for my questions.

Thank you very much for any help in advance.

Kind regards,

astanapane.

The serial GLCD can be used with any MCU (including the PIC184550) that can output serial data. You do not need a GLCD library as it is an intelligent display that has an AtmelAVR MCU on board - you could say that the library lives in the AVR.

I do not provide sample code. You send simple ASCII codes using SEROUT (or HSEROUT) at up to 115,200 baud. Take a look at the datasheet here http://www.sparkfun.com/datasheets/LCD/Monochrome/Corrected-SFE-0016-DataSheet-08884-SerialGraphicLCD-v2.pdf and and the tutorial here http://www.sparkfun.com/tutorials/120

so using picbasic, can i include a file on my code with a picture?

thanks a lot. Sorry for missanderstanding about a sample code. I didnt ask for an actual code but an example.

Thanks anyway for give me the information.

Kind regards,