Pn532 upgrades (#1302)

* Move pn532 -> pn532_spi
Add pn532_i2c

* Update i2c address

* Always wait for ready byte before reading

* Generalise the pn532 a bit more so less code in i2c and spi implementations

* clang

* Add pn532_i2c to test1

* Try to get setup working

* Fixes

* More updates

* Command consts

* A few upgrades

* Change text back to include 'new'

* Fix data reading

esphome/components/pn532_spi/__init__.py

@@ -0,0 +1,21 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import spi, pn532
+from esphome.const import CONF_ID
+
+AUTO_LOAD = ['pn532']
+CODEOWNERS = ['@OttoWinter', '@jesserockz']
+DEPENDENCIES = ['spi']
+
+pn532_spi_ns = cg.esphome_ns.namespace('pn532_spi')
+PN532Spi = pn532_spi_ns.class_('PN532Spi', pn532.PN532, spi.SPIDevice)
+
+CONFIG_SCHEMA = cv.All(pn532.PN532_SCHEMA.extend({
+    cv.GenerateID(): cv.declare_id(PN532Spi),
+}).extend(spi.spi_device_schema(cs_pin_required=True)))
+
+
+def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    yield pn532.setup_pn532(var, config)
+    yield spi.register_spi_device(var, config)