How to interface RFID with atmega162

Hi Guys,
I am new in AVR programming and I need your support in solving my problem.

I need and Rfid to be interfaced with ATmega162.
I have searched many webs on internet. But they are not working fine with atmega162.
I have crystal of 16MHz.
I need an lcd to display "Welcome" then "Show Rfid" then I need to display tag on screen.

I am fimilier with C

Regards,

Looking forward to hear good from you guys.

Have you done anything with devices like the ATmega162 ?

Start by reading our tutorials on how to use LCDs
in the tutorial section.

Your compiler may have built in calls to use LCD displays.
Which compiler do you have ?

How to connect the RFID reader depends on the reader you have.
Do you have one , what is it ?

share the datasheet of RFID reader you're using. It will be easy for us to suggest what you need to do. Moreover try to make things step by step. Start with LCD first and as suggested by ExperimenterUK read the tutorial for LCD to know its working.

[Topic moved to AVR Discussion Forum]

I have read that tutorial
I am using AVR GCC Compiler and using avr studio 4
but debug gives an error "../lcdrickey.c:11: error: 'P3' undeclared (first use in this function)"

I am using avr gcc compiler and avrstudio 4 .
I am using 4 bit lcd interfacing tutorial as on this website but that giving me error
"../lcdrickey.c:12: error: 'P3' undeclared (first use in this function)"
please tell me why is this so.

Have you done anything with devices like the ATmega162 ?

Start by reading our tutorials on how to use LCDs
in the tutorial section.

Your compiler may have built in calls to use LCD displays.
Which compiler do you have ?

How to connect the RFID reader depends on the reader you have.
Do you have one , what is it ?

ExperimenterUK

Have you done anything with devices like the ATmega162 ?

Start by reading our tutorials on how to use LCDs
in the tutorial section.

Your compiler may have built in calls to use LCD displays.
Which compiler do you have ?

How to connect the RFID reader depends on the reader you have.
Do you have one , what is it ?

ExperimenterUK

LCD tutorial is written for 8051, you need to change port information to make it work with AVR controller. Can you post your schematic so I can suggest you changes needed.