Displays

esphomeyaml/components/display/lcd_pcf8574.py

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+import voluptuous as vol
+
+import esphomeyaml.config_validation as cv
+from esphomeyaml.components import display
+from esphomeyaml.components.display.lcd_gpio import LCDDisplayRef, validate_lcd_dimensions
+from esphomeyaml.const import CONF_ADDRESS, CONF_DIMENSIONS, CONF_ID, CONF_LAMBDA
+from esphomeyaml.helpers import App, Pvariable, add, process_lambda
+
+DEPENDENCIES = ['i2c']
+
+PCF8574LCDDisplay = display.display_ns.PCF8574LCDDisplay
+
+PLATFORM_SCHEMA = display.BASIC_DISPLAY_PLATFORM_SCHEMA.extend({
+    cv.GenerateID(): cv.declare_variable_id(PCF8574LCDDisplay),
+    vol.Required(CONF_DIMENSIONS): validate_lcd_dimensions,
+    vol.Optional(CONF_ADDRESS): cv.i2c_address,
+
+    vol.Optional(CONF_LAMBDA): cv.lambda_,
+})
+
+
+def to_code(config):
+    rhs = App.make_pcf8574_lcd_display(config[CONF_DIMENSIONS][0], config[CONF_DIMENSIONS][1])
+    lcd = Pvariable(config[CONF_ID], rhs)
+
+    if CONF_ADDRESS in config:
+        add(lcd.set_address(config[CONF_ADDRESS]))
+
+    if CONF_LAMBDA in config:
+        for lambda_ in process_lambda(config[CONF_LAMBDA], [(LCDDisplayRef, 'it')]):
+            yield
+        add(lcd.set_writer(lambda_))
+
+    display.setup_display(lcd, config)
+
+
+BUILD_FLAGS = ['-DUSE_LCD_DISPLAY', '-DUSE_LCD_DISPLAY_PCF8574']