C Program to Interface Keypad Using 8051

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Josephine
Posts: 10
Joined: Sat Feb 25, 2017 8:24 am

C Program to Interface Keypad Using 8051

Post by Josephine » Sat Feb 25, 2017 11:42 am

I wanna make a program in c which will scan the keypad and send the result to first serial port.
P1.0 to P1.3 stands for columns and P2.0 to P2.3 stands for rows. Serial port should have a band 56k, 8 bit and 1 stop bit.
Help me do + understand it.. Thanx
A beginner is here..

Junaid_Shahid
Posts: 117
Joined: Tue Feb 14, 2017 9:00 am

Re: C Program to Interface Keypad Using 8051

Post by Junaid_Shahid » Sat Feb 25, 2017 11:43 am

Josephine wrote:
Sat Feb 25, 2017 11:42 am
I wanna make a program in c which will scan the keypad and send the result to first serial port.
P1.0 to P1.3 stands for columns and P2.0 to P2.3 stands for rows. Serial port should have a band 56k, 8 bit and 1 stop bit.
Help me do + understand it.. Thanx
A beginner is here..
The coding method I followed is implementing small functions: column_scan, row_scan and then the main. You may also need a 2-D array as lookup for getting the value of the key that is pressed.

Once you get the keypad value, sending it through serial port is easy.
Recommended tutorial: Interfacing of Keypad with 8051 Microcontroller in Proteus ISIS

ShraddhaKapoor
Posts: 1
Joined: Fri Mar 10, 2017 7:35 am

Re: C Program to Interface Keypad Using 8051

Post by ShraddhaKapoor » Fri Mar 10, 2017 7:38 am

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