Add compile-tested support for ESP32-IDF, some fixes from code review,

update README

components/dmx512/__init__.py

@@ -1,9 +1,9 @@
 import esphome.codegen as cg
 import esphome.config_validation as cv
-from esphome import pins, automation
+from esphome import pins
 from esphome.components import uart
-from esphome.const import CONF_ID, CONF_TX_PIN
-from esphome.core import CORE, coroutine
+from esphome.const import CONF_ID, CONF_TX_PIN, CONF_ENABLE_PIN, CONF_UPDATE_INTERVAL
+from esphome.core import CORE
 
 DEPENDENCIES = ['uart']
 MULTI_CONF = True
@@ -11,15 +11,14 @@ MULTI_CONF = True
 dmx512_ns = cg.esphome_ns.namespace('dmx512')
 DMX512ESP32 = dmx512_ns.class_('DMX512ESP32', cg.Component)
 DMX512ESP8266 = dmx512_ns.class_('DMX512ESP8266', cg.Component)
+DMX512ESP32IDF = dmx512_ns.class_('DMX512ESP32IDF', cg.Component)
 
 CONF_DMX512_ID = 'dmx512_id'
-CONF_ENABLE_PIN = 'enable_pin'
 CONF_UART_NUM = 'uart_num'
 CONF_PERIODIC_UPDATE = 'periodic_update'
 CONF_FORCE_FULL_FRAMES = 'force_full_frames'
 CONF_CUSTOM_BREAK_LEN = 'custom_break_len'
 CONF_CUSTOM_MAB_LEN = 'custom_mab_len'
-CONF_UPDATE_INTERVAL = 'update_interval'
 
 UART_MAX = 2
 
@@ -32,6 +31,8 @@ def _declare_type(value):
     if CORE.is_esp32:
         if CORE.using_arduino:
             return cv.declare_id(DMX512ESP32)(value)
+        elif CORE.using_esp_idf:
+            return cv.declare_id(DMX512ESP32IDF)(value)
     elif CORE.is_esp8266:
         return cv.declare_id(DMX512ESP8266)(value)
     raise NotImplementedError
@@ -43,7 +44,7 @@ CONFIG_SCHEMA = cv.Schema({
     cv.Optional(CONF_UART_NUM, default=1): cv.int_range(min=0, max=UART_MAX),
     cv.Optional(CONF_PERIODIC_UPDATE, default=True): cv.boolean,
     cv.Optional(CONF_FORCE_FULL_FRAMES, default=False): cv.boolean,
-    cv.Optional(CONF_CUSTOM_MAB_LEN, default=12): cv.int_range(min=12,max=1000),
+    cv.Optional(CONF_CUSTOM_MAB_LEN, default=12): cv.int_range(min=12, max=1000),
     cv.Optional(CONF_CUSTOM_BREAK_LEN, default=92): cv.int_range(min=92, max=1000),
     cv.Optional(CONF_UPDATE_INTERVAL, default=500): cv.int_range(),
 }).extend(cv.COMPONENT_SCHEMA).extend(uart.UART_DEVICE_SCHEMA)
@@ -53,7 +54,7 @@ async def to_code(config):
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await uart.register_uart_device(var, config)
-    
+
     if CONF_ENABLE_PIN in config:
         enable = await cg.gpio_pin_expression(config[CONF_ENABLE_PIN])
         cg.add(var.set_enable_pin(enable))

components/dmx512/dmx512esp32idf.cpp

@@ -0,0 +1,21 @@
+#ifdef USE_ESP_IDF
+
+#include "dmx512esp32idf.h"
+#include "esphome/core/log.h"
+#include <driver/uart.h>
+
+namespace esphome {
+namespace dmx512 {
+
+static const char *TAG = "dmx512";
+
+void DMX512ESP32IDF::sendBreak() {
+  uart_set_line_inverse(this->uart_idx_, UART_SIGNAL_TXD_INV);
+  delayMicroseconds(this->break_len_);
+  uart_set_line_inverse(this->uart_idx_, UART_SIGNAL_INV_DISABLE);
+  delayMicroseconds(this->mab_len_);
+}
+
+}  // namespace dmx512
+}  // namespace esphome
+#endif  // USE_ESP_IDF

components/dmx512/dmx512esp32idf.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#ifdef USE_ESP_IDF
+
+#include "dmx512.h"
+
+namespace esphome {
+namespace dmx512 {
+
+class DMX512ESP32IDF : public DMX512 {
+ public:
+  DMX512ESP32IDF() = default;
+
+  void sendBreak() override;
+
+  void set_uart_num(int num) override {
+    this->uart_idx_ = num;
+  }
+};
+
+}  // namespace dmx512
+}  // namespace esphome
+
+#endif  // USE_ESP_IDF

components/dmx512/output.py

@@ -22,6 +22,8 @@ def _declare_type(value):
     if CORE.is_esp32:
         if CORE.using_arduino:
             return cv.use_id(dmx512.DMX512ESP32)(value)
+        elif CORE.using_esp_idf:
+            return cv.use_id(dmx512.DMX512ESP32IDF)(value)
     elif CORE.is_esp8266:
         return cv.use_id(dmx512.DMX512ESP8266)(value)
     raise NotImplementedError