Description

Nintendo NES controller serial -> parallel IP.

This IP interfaces up to TWO (or more, if you like) old-school (so not the USB ones) controllers and performs the serial to parallel conversion upon receiving a 'frame' start bit. Once the 'busy' flag goes low the results will appear on q0 and q1. Reading q0 and q1 while the controller is busy will yield partial / old results. The order keys appear in are:

• bit #0 - right
• bit #1 - left
• bit #2 - down
• bit #3 - up
• bit #4 - select
• bit #5 - start
• bit #6 - b
• bit #7 - a

NOTE: The original controller uses a 5V shift register which means you'll have to use some sort of level-shifter if you want to use it at 3.3v. Pull-ups are built into the controller so the signals are active low.

Pinouts can be found on the internet, or here:

The url of the svn repository is: https://opencores.org/websvn/listing/nescontroller/nescontroller