[Oberon] FPGA - nRF24L01 `RPI Net' server
paulreed at paddedcell.com
Thu May 3 11:04:13 CEST 2018
> Thank you. What is the function of `spiFast'?
This was implemented for performance reasons, particularly for the SD-Card
interface to the filesystem. When bit 2 of spiCtrl is 1, the SPI
transfers a word at a time, at a higher bitrate.
So byte commands are usually used to set up a command, and then word
transfers are used when reading and writing buffer data.
See SPI.v and the ReadSD/WriteSD routines in Kernel.Mod.
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