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Add backlight handling for lcd_pcf8574 (#573)

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* Add backlight handling for lcd_pcf8574

Switch the backlight on or off by calling id(mydisplay).backlight()
or id(mydisplay).no_backlight() in lamda functions (assuming mydisplay
is the custom id for the LCD).

* Use abstract method


Co-authored-by: Attila Darazs <attila@darazs.com>
Co-authored-by: Otto Winter <otto@otto-winter.com>
This commit is contained in:
Attila Darazs
2019-06-03 19:36:00 +02:00
committed by Otto Winter
parent ebe64e24f1
commit 30a542e763
8 changed files with 45 additions and 16 deletions
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2
esphome/components/lcd_base/lcd_display.cpp
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@@ -107,7 +107,7 @@ void LCDDisplay::update() {
for (uint8_t i = 0; i < this->rows_ * this->columns_; i++)
this->buffer_[i] = ' ';
this->writer_(*this);
this->call_writer();
this->display();
}
void LCDDisplay::command_(uint8_t value) { this->send(value, false); }