libwebsockets/lib/drivers/i2c
Andy Green 15ce46d971 drivers: initial generic gpio and i2c plus bitbang
Make a start on generic peripheral and bus drivers to provide
meta-functionality regardless of platform.

On the one hand this simply provides...

 - bitbang i2c on top of esp-idf gpio apis
 - ssd1306 oled chip driver as found on Heltec WB32
 - modifications to the minimal example test for esp32 to use that

... on the other hand, those capabilities are provided by creating:

 - an abstract i2c class object
 - an abstract gpio class object
 - i2c class implementation using the abstract gpio for bitbang
 - an abstract display class object
 - an abstract display state (brightness, animated change,
    on/off/init tracking, autodim after inactive, auto-off /
    blanking after inactive)

... with the intention, eg, you only have to add a platform
implementation for the gpio to be able to use the i2c-based
display drivers and state handling, and i2c bitbang, without
any other modifications.
2020-06-10 19:17:08 +01:00
..
bitbang drivers: initial generic gpio and i2c plus bitbang 2020-06-10 19:17:08 +01:00
lws-i2c.c drivers: initial generic gpio and i2c plus bitbang 2020-06-10 19:17:08 +01:00