connecting a keypad to PIC16F877A

[choy]

hello there!

my groupmates and i are having problems getting the keypad to work. we followed the connections based on this datasheet (http://www.matrixmultimedia.com/resourc ... .php?id=89). attached is a summary of the connections we made. by the way, the keypad is connected to port C on PIC16F877A.



did we miss anything or did something wrong? program simulation in Flowcode is fine. thanks!

[choy]

we're unable to click anything on column 3. what are the possible reasons?

[choy]

we're unable to click anything on column 3. what are the possible reasons?

[JohnCrow]

Hi
Try this program, works on my EB006 V7 with a 16F877A

Simple keypad test-Port C.fcf

(7.5 KiB) Downloaded 310 times

[choy]

JohnCrow,

thanks for the reply. i forgot to mention that we are not using e-blocks for testing this on hardware. we downloaded the program to the chip using Microchip's PicKit2. we didn't have problems downloading the program to the chip. we are just not certain if we followed the connections correctly or if we missed something. the keypad we are using is similar to the one on the datasheet, it's just that it's a mere keypad with 7 pins.

[choy]

hello,

we were able to get the keypad to work. the connections were correct, but our breadboard failed to do it's job. perhaps it's too old and we need a replacement. anyway, everything's working fine now. thanks!

[JohnCrow]

Great
Thanks for letting us know