Display tm1637 (#946)

* add TM1637 support

esphome/components/tm1637/display.py

@@ -0,0 +1,35 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome import pins
+from esphome.components import display
+from esphome.const import CONF_CLK_PIN, CONF_DIO_PIN, CONF_ID, CONF_LAMBDA, CONF_INTENSITY
+
+tm1637_ns = cg.esphome_ns.namespace('tm1637')
+TM1637Display = tm1637_ns.class_('TM1637Display', cg.PollingComponent)
+TM1637DisplayRef = TM1637Display.operator('ref')
+
+CONFIG_SCHEMA = display.BASIC_DISPLAY_SCHEMA.extend({
+    cv.GenerateID(): cv.declare_id(TM1637Display),
+
+    cv.Optional(CONF_INTENSITY, default=7): cv.All(cv.uint8_t, cv.Range(min=0, max=7)),
+    cv.Required(CONF_CLK_PIN): pins.internal_gpio_output_pin_schema,
+    cv.Required(CONF_DIO_PIN): pins.internal_gpio_output_pin_schema,
+}).extend(cv.polling_component_schema('1s'))
+
+
+def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    yield cg.register_component(var, config)
+    yield display.register_display(var, config)
+
+    clk = yield cg.gpio_pin_expression(config[CONF_CLK_PIN])
+    cg.add(var.set_clk_pin(clk))
+    dio = yield cg.gpio_pin_expression(config[CONF_DIO_PIN])
+    cg.add(var.set_dio_pin(dio))
+
+    cg.add(var.set_intensity(config[CONF_INTENSITY]))
+
+    if CONF_LAMBDA in config:
+        lambda_ = yield cg.process_lambda(config[CONF_LAMBDA], [(TM1637DisplayRef, 'it')],
+                                          return_type=cg.void)
+        cg.add(var.set_writer(lambda_))