Bit banging SPI produced some functional results but I’d like to improve my overall data transfer rate, and that means adding some hardware support. I identify 4 areas we can add some assistance to and add some circuitry for the first two. This will be followed (I hope very soon) with the second part finishing of the conversion.
I had originally planned to this all in one video but it very quickly became clear that it would be a long one. It’s sometimes difficult to estimate how long some planned work will take, fortunately this one was fairly easy to divide in two. Everything was recorded before I started editing this, you can always comment suggestions but on this occasions the next steps are already complete.
0:00 Introduction
0:33 Discussing the circuit
1:10 Defining 4 Parts
2:30 Chip Select
8:58 MISO
12:13 Checking with the scope
17:02 Clock Invert
22:09 Multi Byte read debugging
24:26 Cycle counting
25:20 Outro