It's currently not possible to toggle between full off and full on, as
switching to full on leaves the full off control bit set. The full off
control bit takes precedence according to the datasheet, which means the
signal remains off.
The 'normal' branch does correctly clear full off/full on, as it writes
0s to the `LEDn_ON` registers unconditionally and writes 0 to the control
bit in `LEDn_OFF`.
* custom delay
* Update comment
* add bus control status, add some missing include & fixed display output on sh1104 (#319)
* add some missing include
* Fixed display on SH1106
* Fix comment, add force sytem, rework flag, 16 bits data transfert
* Update all library with new I2C API
* custom delay
* Update comment, add bus control status
* fix i2c read + fix ds3231 temp + fix ssd1306 send
