Hey guys,I was just wondering at how long it takes for shiftin to complete one cycle (as in one cycle being the command reading in one byte). I have 20 inputs, therefore needing 3 4021 chips (8*3 > 20).Realistically, I could do with the shiftin being <10ms so that I can call a shiftin every 10ms.
Also, while shiftin is happening, is the arduino able to do other things?
digitalWrite(ssPin, LOW); // if you need CS with the part you are using. can also direct port manipulation for more speedincomingByte = SPI.transfer(0); // where 0 is data that will get clocked out on MOSI pin while data is clocked in on MISO pin at the same time.digitalWrite(ssPin, HIGH);