Dec 11, 2014

My VHDL Adventure

One of my recent VHDL projects needed a 200 Hz signal to multiplex a 4 digit seven segment display. Any faster than 1kHz and the LED’s don’t have enough time to turn on and any slower we could potentially see flickering.

Dec 9, 2014

Magical Voltage

Papilio FPGA 4 Digit 7 Segment display fixed! I was working on this issue for a while where I’d set the anodes for my 4 digit seven segment display to “1110”. Seven segments are low driven which means that a 0 means a digit/segemnt is on and a 1 means off. For some reason I was getting all 4 of my values on no matter what I used: