Add rc522 (esphome#1298)

* wip

* first working

* feat complete

* add CODEOWNERS

* renamed to spi, reset optional

* add test

* fix CODEOWNERS

CODEOWNERS

@@ -44,6 +44,7 @@ esphome/components/output/* @esphome/core
 esphome/components/pid/* @OttoWinter
 esphome/components/pn532/* @OttoWinter
 esphome/components/power_supply/* @esphome/core
+esphome/components/rc522_spi/* @glmnet
 esphome/components/restart/* @esphome/core
 esphome/components/rf_bridge/* @jesserockz
 esphome/components/rtttl/* @glmnet

esphome/components/rc522_spi/__init__.py

@@ -0,0 +1,39 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome import automation, pins
+from esphome.components import spi
+from esphome.const import CONF_ID, CONF_ON_TAG, CONF_TRIGGER_ID, CONF_RESET_PIN, CONF_CS_PIN
+
+CODEOWNERS = ['@glmnet']
+DEPENDENCIES = ['spi']
+AUTO_LOAD = ['binary_sensor']
+MULTI_CONF = True
+
+
+rc522_spi_ns = cg.esphome_ns.namespace('rc522_spi')
+RC522 = rc522_spi_ns.class_('RC522', cg.PollingComponent, spi.SPIDevice)
+RC522Trigger = rc522_spi_ns.class_('RC522Trigger', automation.Trigger.template(cg.std_string))
+
+CONFIG_SCHEMA = cv.Schema({
+    cv.GenerateID(): cv.declare_id(RC522),
+    cv.Optional(CONF_RESET_PIN): pins.gpio_output_pin_schema,
+    cv.Required(CONF_CS_PIN): pins.gpio_output_pin_schema,
+    cv.Optional(CONF_ON_TAG): automation.validate_automation({
+        cv.GenerateID(CONF_TRIGGER_ID): cv.declare_id(RC522Trigger),
+    }),
+}).extend(cv.polling_component_schema('1s')).extend(spi.spi_device_schema())
+
+
+def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    yield cg.register_component(var, config)
+    yield spi.register_spi_device(var, config)
+
+    if CONF_RESET_PIN in config:
+        reset = yield cg.gpio_pin_expression(config[CONF_RESET_PIN])
+        cg.add(var.set_reset_pin(reset))
+
+    for conf in config.get(CONF_ON_TAG, []):
+        trigger = cg.new_Pvariable(conf[CONF_TRIGGER_ID])
+        cg.add(var.register_trigger(trigger))
+        yield automation.build_automation(trigger, [(cg.std_string, 'x')], conf)

esphome/components/rc522_spi/binary_sensor.py

@@ -0,0 +1,44 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import binary_sensor
+from esphome.const import CONF_UID, CONF_ID
+from esphome.core import HexInt
+from . import rc522_spi_ns, RC522
+
+DEPENDENCIES = ['rc522_spi']
+
+CONF_RC522_ID = 'rc522_id'
+
+
+def validate_uid(value):
+    value = cv.string_strict(value)
+    for x in value.split('-'):
+        if len(x) != 2:
+            raise cv.Invalid("Each part (separated by '-') of the UID must be two characters "
+                             "long.")
+        try:
+            x = int(x, 16)
+        except ValueError as err:
+            raise cv.Invalid("Valid characters for parts of a UID are 0123456789ABCDEF.") from err
+        if x < 0 or x > 255:
+            raise cv.Invalid("Valid values for UID parts (separated by '-') are 00 to FF")
+    return value
+
+
+RC522BinarySensor = rc522_spi_ns.class_('RC522BinarySensor', binary_sensor.BinarySensor)
+
+CONFIG_SCHEMA = binary_sensor.BINARY_SENSOR_SCHEMA.extend({
+    cv.GenerateID(): cv.declare_id(RC522BinarySensor),
+    cv.GenerateID(CONF_RC522_ID): cv.use_id(RC522),
+    cv.Required(CONF_UID): validate_uid,
+})
+
+
+def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    yield binary_sensor.register_binary_sensor(var, config)
+
+    hub = yield cg.get_variable(config[CONF_RC522_ID])
+    cg.add(hub.register_tag(var))
+    addr = [HexInt(int(x, 16)) for x in config[CONF_UID].split('-')]
+    cg.add(var.set_uid(addr))