Mobile Phone
Project Objectives:-
Mobile use GSM standard (General system for mobile
communication) via which we are do calling to other GSM mobiles. This task is
going to satisfy in this project.
Our objectives are given below:
·
Interface 4-bit LCD module with ARM processor.
-
In this interfacing LCD going to operate on
4-bit mode. For that we are going to use 4 of data pin and 3 of control pin.
·
Interfacing Keypad switches with ARM processor.
-
This interface done by interfacing keypad as
simple switch. So it takes more input port as one per switch.
·
Interfacing sim-300 GSM module with ARM
processor
-
GSM interface by serial communication with
processor. As GSM supports AT commands, we are going to pass AT commands
serially with 9600 baud rate.
·
Interfacing RTC with ARM processor
-
Real Time Clock (RTC) is device working on I2C
protocol. This interface requires only 2 ports SCL and SDA.
·
Having power supply circuit for controller. And
battery charging circuit with battery level indicator.
-
This mobile phone is having sim300 GSM module
which supports AT commands. We are going to interface GSM module serially with
ARM LPC2148.
-
For giving input like, phone number dialing, we
are going to interface switches with processor. This will help to dial number
and do calling functionality. We also having interface with 20 x 4 LCD, which
gives good user interface, charging information and signal strength indication.
