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Altera_Forum
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17 years ago

DE2 Keypad Scanner?

I'm looking for a keypad scanner programmed in Verilog for the DE2. I've found some C language keypad scanner but I can't get them to work. On my own attempt at Verilog, I can scan either ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Apart from any details of Verilog or C programming, you basically need a idea how to identify a pressed key on a keyboard or in other words: You have to design the algorithm. For the FPGA implementation, you should consider some additional stuff, e. g. how to generate a timed sequence that can step through the matrix and select either one row or column at a time.