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DRIVERS.md Add micro-gui and bus sharing notes.

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Peter Hinch 2021-06-23 18:37:43 +01:00
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DRIVERS.md
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@ -7,10 +7,12 @@ All drivers provide a display class subclassed from the built-in
* Graphics via the `FrameBuffer` graphics primitives. * Graphics via the `FrameBuffer` graphics primitives.
* Text rendering in arbitrary fonts via `Writer` and `Cwriter` classes (see * Text rendering in arbitrary fonts via `Writer` and `Cwriter` classes (see
[font_to_py.py](https://github.com/peterhinch/micropython-font-to-py.git)). [font_to_py.py](https://github.com/peterhinch/micropython-font-to-py.git)).
* Use with nano-gui. * Use with nano-gui and [micro-gui](https://github.com/peterhinch/micropython-micro-gui/).
It should be noted that in the interests of conserving RAM these drivers offer It should be noted that in the interests of conserving RAM these drivers offer
a bare minimum of functionality required to support the above. a bare minimum of functionality required to support the above. They assume sole
access to the SPI or I2C bus. Applications which share the bus must do their
own arbitration.
This document is written to support users of `nano-gui`, who only need to This document is written to support users of `nano-gui`, who only need to
instantiate a display to use the GUI. Hence only device constructors are instantiate a display to use the GUI. Hence only device constructors are