From 539ba116902e9db3f2c45685e24dc353a9c66dfa Mon Sep 17 00:00:00 2001
From: Theo Arends <11044339+arendst@users.noreply.github.com>
Date: Mon, 5 Oct 2020 19:03:40 +0200
Subject: [PATCH] Add support for inverted NeoPixelBus data

Add support for inverted NeoPixelBus data line by enabling ``#define USE_WS2812_INVERTED`` (#8988)
---
 RELEASENOTES.md            |  1 +
 tasmota/CHANGELOG.md       |  1 +
 tasmota/my_user_config.h   |  1 +
 tasmota/xlgt_01_ws2812.ino | 34 ++++++++++++++++++++++++++++++++--
 4 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index a860f942f..46e203c81 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -79,3 +79,4 @@ The attached binaries can also be downloaded from http://ota.tasmota.com/tasmota
 - Add optional support for Mitsubishi Electric HVAC by David Gwynne (#9237)
 - Add optional support for Orno WE517-Modbus energy meter by Maxime Vincent (#9353)
 - Add SDM630 three phase ImportActive Energy display when ``#define SDM630_IMPORT`` is enabled by Janusz Kostorz (#9124)
+- Add support for inverted NeoPixelBus data line by enabling ``#define USE_WS2812_INVERTED`` (#8988)
diff --git a/tasmota/CHANGELOG.md b/tasmota/CHANGELOG.md
index 7c107d184..d4296a9ee 100644
--- a/tasmota/CHANGELOG.md
+++ b/tasmota/CHANGELOG.md
@@ -20,6 +20,7 @@
 - Add optional support for Mitsubishi Electric HVAC by David Gwynne (#9237)
 - Add optional support for Orno WE517-Modbus energy meter by Maxime Vincent (#9353)
 - Add SDM630 three phase ImportActive Energy display when ``#define SDM630_IMPORT`` is enabled by Janusz Kostorz (#9124)
+- Add support for inverted NeoPixelBus data line by enabling ``#define USE_WS2812_INVERTED`` (#8988)
 
 ## Released
 
diff --git a/tasmota/my_user_config.h b/tasmota/my_user_config.h
index 82eb7aa39..89fdd678d 100644
--- a/tasmota/my_user_config.h
+++ b/tasmota/my_user_config.h
@@ -474,6 +474,7 @@
 // -- Optional light modules ----------------------
 #define USE_WS2812                               // WS2812 Led string using library NeoPixelBus (+5k code, +1k mem, 232 iram) - Disable by //
 //  #define USE_WS2812_DMA                         // DMA supports only GPIO03 (= Serial RXD) (+1k mem). When USE_WS2812_DMA is enabled expect Exceptions on Pow
+//  #define USE_WS2812_INVERTED                    // Use inverted data signal
   #define USE_WS2812_HARDWARE  NEO_HW_WS2812     // Hardware type (NEO_HW_WS2812, NEO_HW_WS2812X, NEO_HW_WS2813, NEO_HW_SK6812, NEO_HW_LC8812, NEO_HW_APA106)
   #define USE_WS2812_CTYPE     NEO_GRB           // Color type (NEO_RGB, NEO_GRB, NEO_BRG, NEO_RBG, NEO_RGBW, NEO_GRBW)
 #define USE_MY92X1                               // Add support for MY92X1 RGBCW led controller as used in Sonoff B1, Ailight and Lohas
diff --git a/tasmota/xlgt_01_ws2812.ino b/tasmota/xlgt_01_ws2812.ino
index 368567181..e22d090d4 100644
--- a/tasmota/xlgt_01_ws2812.ino
+++ b/tasmota/xlgt_01_ws2812.ino
@@ -63,7 +63,21 @@ void (* const Ws2812Command[])(void) PROGMEM = {
 
 #ifdef USE_WS2812_DMA
 
+#ifdef USE_WS2812_INVERTED
 // See NeoEspDmaMethod.h for available options
+
+#if (USE_WS2812_HARDWARE == NEO_HW_WS2812X)
+  typedef NeoEsp8266DmaInvertedWs2812xMethod selectedNeoSpeedType;
+#elif (USE_WS2812_HARDWARE == NEO_HW_SK6812)
+  typedef NeoEsp8266DmaInvertedSk6812Method selectedNeoSpeedType;
+#elif (USE_WS2812_HARDWARE == NEO_HW_APA106)
+  typedef NeoEsp8266DmaInvertedApa106Method selectedNeoSpeedType;
+#else   // USE_WS2812_HARDWARE
+  typedef NeoEsp8266DmaInverted800KbpsMethod selectedNeoSpeedType;
+#endif  // USE_WS2812_HARDWARE
+
+#else  // No USE_WS2812_INVERTED
+
 #if (USE_WS2812_HARDWARE == NEO_HW_WS2812X)
   typedef NeoEsp8266DmaWs2812xMethod selectedNeoSpeedType;
 #elif (USE_WS2812_HARDWARE == NEO_HW_SK6812)
@@ -74,9 +88,23 @@ void (* const Ws2812Command[])(void) PROGMEM = {
   typedef NeoEsp8266Dma800KbpsMethod selectedNeoSpeedType;
 #endif  // USE_WS2812_HARDWARE
 
-#else   // USE_WS2812_DMA
+#endif  // No USE_WS2812_INVERTED
 
+#else   // No USE_WS2812_DMA
+
+#ifdef USE_WS2812_INVERTED
 // See NeoEspBitBangMethod.h for available options
+
+#if (USE_WS2812_HARDWARE == NEO_HW_WS2812X)
+  typedef NeoEsp8266BitBangWs2812xInvertedMethod selectedNeoSpeedType;
+#elif (USE_WS2812_HARDWARE == NEO_HW_SK6812)
+  typedef NeoEsp8266BitBangSk6812InvertedMethod selectedNeoSpeedType;
+#else   // USE_WS2812_HARDWARE
+  typedef NeoEsp8266BitBang400KbpsInvertedMethod selectedNeoSpeedType;
+#endif  // USE_WS2812_HARDWARE
+
+#else  // No USE_WS2812_INVERTED
+
 #if (USE_WS2812_HARDWARE == NEO_HW_WS2812X)
   typedef NeoEsp8266BitBangWs2812xMethod selectedNeoSpeedType;
 #elif (USE_WS2812_HARDWARE == NEO_HW_SK6812)
@@ -85,7 +113,9 @@ void (* const Ws2812Command[])(void) PROGMEM = {
   typedef NeoEsp8266BitBang800KbpsMethod selectedNeoSpeedType;
 #endif  // USE_WS2812_HARDWARE
 
-#endif  // USE_WS2812_DMA
+#endif  // No USE_WS2812_INVERTED
+
+#endif  // No USE_WS2812_DMA
 
 NeoPixelBus<selectedNeoFeatureType, selectedNeoSpeedType> *strip = nullptr;