mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-14 14:58:05 +11:00
7001446212
Recipes contain bits and pieces of hardware-related knowledge, but these bits feel sparse. I've been wanting to consolidate hardware- related documentation for a while, but always fell at odds with the recipes organisation. We don't have recipes anymore, just a /doc/hw section that contains hardware-related documentation which often translate to precise instructions to run Collapse OS on a specific machine. With this new organisation, I hope to end up with a better, more solid documentation.
14 lines
501 B
Plaintext
14 lines
501 B
Plaintext
# Communicating through SPI
|
|
|
|
Many very useful device are able to communicate through the SPI
|
|
protocol, for example, SD cards and AVR MCUs. In many cases,
|
|
however, CPUs can't "speak SPI" because of their inability to
|
|
bit-bang.
|
|
|
|
In most cases, we need an extra peripheral, which we can build
|
|
ourselves, to interface with devices that "speak SPI". We call
|
|
this peripheral a SPI relay.
|
|
|
|
The design of those relays depend on the CPU architecture. See
|
|
spi.txt in arch-specific folders for more information.
|