luismgallegosc / papilio-example-seven-segment

Simple I/O example working with a Papilio One board and a seven segment display.

Papilio One seven segment display example

Example project using a Papilio One board.

The board takes 4 inputs, and has 8 outputs connected to a seven segment display. The display shows the hexadecimal value of the 4 inputs.

The following truth table shows all possible I/O values.

in[3]	in[2]	in[1]	in[0]	out [7]	out [6]	out [5]	out [4]	out [3]	out [2]	out [1]	out [0]
0	0	0	0	1	1	0	0	0	0	0	0
0	0	0	1	1	1	1	1	1	0	0	1
0	0	1	0	1	0	1	0	0	1	0	0
0	0	1	1	1	0	1	1	0	0	0	0
0	1	0	0	1	0	0	1	1	0	0	1
0	1	0	1	1	0	0	1	0	0	1	0
0	1	1	0	1	0	0	0	0	0	1	0
0	1	1	1	1	1	1	1	1	0	0	0
1	0	0	0	1	0	0	0	0	0	0	0
1	0	0	1	1	0	0	1	0	0	0	0
1	0	1	0	1	0	0	0	1	0	0	0
1	0	1	1	1	0	0	0	0	0	1	1
1	1	0	0	1	1	0	0	0	1	1	0
1	1	0	1	1	0	1	0	0	0	0	1
1	1	1	0	1	0	0	0	0	1	1	0
1	1	1	1	1	0	0	0	1	1	1	0

Where the routing of outputs to the seven segment display is as follows.

Out pin	7-seg pin
out[0]	a
out[1]	b
out[2]	c
out[3]	d
out[4]	e
out[5]	f
out[6]	g
out[7]	h

A short video showing the project running can be found here.