7-segment display and keypad multiplexing

[Jake]

Anyone;

I am new to the PIC world and was wondering if anyone can help with some source code or a flow chart to get me going on a project that has 4, 7-segment displays multiplexed with a 2x3 keypad. I am using port B to drive the segments ( 7 plus the DP) and port D to drive the anodes of the 4 dislays and also to provide the 3 columns to the keypad matrix. The 2 rows for the keypads are read in port C.

What I am looking for is the proper timing to create the display and also, while a segment is 'turned ON' also be able to see if a key is hit.

If anyone can point me in a direction I would greatly appreciate it.

Thanks in advance and have a great New Year!

Jake

[snoopy]

Hi

for 7 segment, i am using max7221. that is really simple way
to multiplex 7 segment, max7221 works with spi communication.

For the keypad, look there are several example on internet.

ex:

output_high(PIN_C2); //put pin c2 to high
if input(PIN_C0) //if input c0 is high
{ write would you like to do (a fonction)}
if input(PIN_C1)
{ write would you like to do(a fonction)} }

output_low(PIN_C2); //put pin c2 to low


output_high(PIN_C3); //put pin c3 to high
if input(PIN_C0) //if input c0 is high
{ write would you like to do (a fonction)}}
if input(PIN_C1)
{ write would you like to do (a fonction)}}


i try to give you a really beginner soft.

before begin software, you need to think what do you want to do.
write it on the paper and after make a little step by step sequence
of your program.

Good lock