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Dedupe I2C, SPI, UART driver inclusions (#22253)

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Ryan 2023-10-13 17:25:32 +11:00 • committed by GitHub
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docs/spi_driver.md
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@ -2,6 +2,18 @@
The SPI Master drivers used in QMK have a set of common functions to allow portability between MCUs.
## Usage :id=usage
In most cases, the SPI Master driver code is automatically included if you are using a feature or driver which requires it, such as [OLED](feature_oled_driver.md).
However, if you need to use the driver standalone, add the following to your `rules.mk`:
```make
SPI_DRIVER_REQUIRED = yes
```
You can then call the SPI API by including `spi_master.h` in your code.
## AVR Configuration :id=avr-configuration
No special setup is required - just connect the `SS`, `SCK`, `MOSI` and `MISO` pins of your SPI devices to the matching pins on the MCU: