0001-Extend-FastLED-to-work-with-RP2040-PicoDMX-Library.patch

From 339481f5fcb2485439472c42aec8e8e9444743e5 Mon Sep 17 00:00:00 2001
From: Scott Sullivan <scott@revident.net>
Date: Fri, 22 Nov 2024 14:00:00 -0500
Subject: [PATCH] Extend FastLED to work with RP2040 PicoDMX Library.

Best effor while learning on a deadline, not suitbale for upstreaming.
---
 src/FastLED.h | 17 +++++++++++++++++
 src/dmx.h     | 46 +++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/src/FastLED.h b/src/FastLED.h
index 463a6831..732a2c28 100644
--- a/src/FastLED.h
+++ b/src/FastLED.h
@@ -43,6 +43,10 @@
 #include <DMXSerial.h>
 #endif
 
+//#ifdef DmxOutput_h
+#include <DmxOutput.h>
+//#endif
+
 #ifdef USE_OCTOWS2811
 #include <OctoWS2811.h>
 #endif
@@ -159,6 +163,9 @@ template<uint8_t DATA_PIN, EOrder RGB_ORDER> class DMXSIMPLE : public DMXSimpleC
 /// @copydoc DMXSerialController
 template<EOrder RGB_ORDER> class DMXSERIAL : public DMXSerialController<RGB_ORDER> {};
 #endif
+//#if defined(DmxOutput_h) || defined(FASTLED_DOXYGEN)
+template<uint8_t DATA_PIN, EOrder RGB_ORDER> class DMXPICO : public DMXPicoController<DATA_PIN, RGB_ORDER> {};
+//#endif
 #endif
 /// @} ClocklessChipsets
 /// @} Chipsets
@@ -400,6 +407,16 @@ public:
 		}
 	}
 	#endif
+
+	#ifdef FASTSPI_USE_DMX_PICO
+	template<EClocklessChipsets CHIPSET, uint8_t DATA_PIN, EOrder RGB_ORDER=RGB>
+	static CLEDController &addLeds(struct CRGB *data, int nLedsOrOffset, int nLedsIfOffset = 0)
+	{
+		switch(CHIPSET) {
+			case DMX: { static DmxOutput controller; return addLeds(&controller, data, nLedsOrOffset, nLedsIfOffset); }
+		}
+	}
+	#endif
 	/// @} Adding 3-wire led controllers
 #endif
 
diff --git a/src/dmx.h b/src/dmx.h
index 44a18e66..c4b45b45 100644
--- a/src/dmx.h
+++ b/src/dmx.h
@@ -82,9 +82,53 @@ public:
 
 FASTLED_NAMESPACE_END
 
+#endif
+
+//#if defined(DmxOutput_h) || defined(FASTLED_DOXYGEN)
+#include <DmxOutput.h>
+//#include <DmxOutput.pio.h>
+
+/// Flag set when the DmxOutput library is included
+#define HAS_DMX_PICO
+
+FASTLED_NAMESPACE_BEGIN
+
+/// DMX512 based LED controller class, using the Pico-DMX library
+/// @tparam RGB_ORDER the RGB ordering for these LEDs
+/// @see https://github.com/jostlowe/Pico-DMX
+/// @see https://en.wikipedia.org/wiki/DMX512
+template <uint8_t DATA_PIN, EOrder RGB_ORDER = RGB> class DMXPicoController : public CPixelLEDController<RGB_ORDER> {
+public:
+	#define UNIVERSE_LENGTH 69 // 4 + 32 + 32 RGBW channels
+	uint8_t universe[UNIVERSE_LENGTH + 1];
+
+	/// Initialize the LED controller
+	DmxOutput dmx;
+	virtual void init() { dmx.begin(DATA_PIN); }
+
+	/// @copydoc CPixelLEDController::showPixels()
+	virtual void showPixels(PixelController<RGB_ORDER> & pixels) {
+		uint16_t iChannel = 1;
+		while(pixels.has(1)) {
+			universe[iChannel++] = pixels.loadAndScale0();
+			universe[iChannel++] = pixels.loadAndScale1();
+			universe[iChannel++] = pixels.loadAndScale2();
+			universe[iChannel++] = 0; // white channel skip
+			pixels.advanceData();
+			pixels.stepDithering();
+		}
+		while (dmx.busy()) { /* Do nothing while the DMX frame transmits */ }
+
+		dmx.write(universe, UNIVERSE_LENGTH + 1);
+		delay(1);
+	}
+};
+
+FASTLED_NAMESPACE_END
+
 /// @} DMXControllers
 /// @} Chipsets
 
-#endif
+//#endif
 
 #endif
-- 
2.47.0