Re: Code Bounty
- Posted by katsmeow Feb 02, 2023
- 1434 views
It reads GPIO pins and then writes to some other GPIO pins, using OE(?), if i understand how you built it, so yes, it's very much what most of my projects need.
Perhaps you would know... there seems to be another point of misinformation (or maybe things have changed over the years) about reading and writing the pins, they can be read/written in 8bit groups, or all at once?
Is there handshaking of groups of pins, like "data is valid when status pin is low", or perhaps "send the next byte"?
One discussion thread i ran across in urls Greg provided (which i am still reading thru) says IO speed can be severely limited by compilers generating branch predictions that fail, such as "while RDY pin is False do else read byte" (or however you like to write that), is OE running on the Pi subject to this or is it a C/Python/machine_code issue?
Kat
