How to compare strings/array? RFID Project

[astanapane]

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

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

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.

[Gevo]

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,

[astanapane]

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.

[Ioannis]

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

[Bruce]

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!

[Ioannis]

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

[astanapane]

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,