08-01-2013, 02:59 PM
DESIGN OF WIRELESS DATA MODEM
AIM:
To communicate between two microprocessors using wireless data modems.
APPARATUS REQUIRED:
1.8085 microprocessor kit - 2
2. Wireless data modem – 2
DESIGN:
Baud rate calculation:
Baud rate * Required baud rate input to 8251= Required clock
16*300 = 4800
Therefore, Required clock input to 8251 = 4800 Hz
Count value = Clock input to 8253 / Required clock input to 8251
=1.536*10^6 / 4800
= 320 = 140 H.
ALGORITHM FOR TRANSMITTER:
1. Initialize the serial port for data transmission.
2. Set baud rate as 300.
3. Initialize the memory pointer of the data to be transmitted.
4. Set a counter for verification of EOF.
5. Get the data from the consecutive memory locations and transmit it till EOF is reached.
6. Reset the system.
RESULT:
Thus the communication between two microprocessors is made using wireless data modem.