3 Commits

Author	SHA1	Message	Date
Virgil Dupras	46676547d9	spi: add SPI_DELAY decl ... AVR chips often run at less than z80's system clock. This means that our SPI relay needs to have its own clock to properly communicate with it. This means that the delay between OUT and IN can't be hardcoded to 2 NOPs anymore. It needs to be configurable.	2020-08-23 07:55:17 -04:00
Virgil Dupras	124da6adec	Move SD Card subsystem outside of RC2014 recipe and add protocols ... Although the SPI Relay driver is RC2014-specific, the SD Card driver is generic enough to be a subsystem. That's the second subsystem we add and this warrants, I think, the formalization of a new concept: protocols.	2020-08-16 14:30:33 -04:00
Virgil Dupras	f09aa0603c	rc2014: separate SPI relay and SDC drivers ... My intention is to reuse the SPI relay to program AVR MCUs from a RC2014.	2020-06-29 18:48:00 -04:00