Initial commit

2018-11-26 00:49:19 +01:00
commit 368127e848
355 changed files with 67999 additions and 0 deletions
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+#ifndef __INC_CLOCKLESS_ARM_K20_H
+#define __INC_CLOCKLESS_ARM_K20_H
+
+FASTLED_NAMESPACE_BEGIN
+
+// Definition for a single channel clockless controller for the k20 family of chips, like that used in the teensy 3.0/3.1
+// See clockless.h for detailed info on how the template parameters are used.
+#if defined(FASTLED_TEENSY3)
+
+#define FASTLED_HAS_CLOCKLESS 1
+
+template <int DATA_PIN, int T1, int T2, int T3, EOrder RGB_ORDER = RGB, int XTRA0 = 0, bool FLIP = false, int WAIT_TIME = 50>
+class ClocklessController : public CLEDController {
+	typedef typename FastPin<DATA_PIN>::port_ptr_t data_ptr_t;
+	typedef typename FastPin<DATA_PIN>::port_t data_t;
+
+	data_t mPinMask;
+	data_ptr_t mPort;
+	CMinWait<WAIT_TIME> mWait;
+public:
+	virtual void init() {
+		FastPin<DATA_PIN>::setOutput();
+		mPinMask = FastPin<DATA_PIN>::mask();
+		mPort = FastPin<DATA_PIN>::port();
+	}
+
+	virtual uint16_t getMaxRefreshRate() const { return 400; }
+
+	virtual void clearLeds(int nLeds) {
+		showColor(CRGB(0, 0, 0), nLeds, 0);
+	}
+
+protected:
+
+	// set all the leds on the controller to a given color
+	virtual void showColor(const struct CRGB & rgbdata, int nLeds, CRGB scale) {
+		PixelController<RGB_ORDER> pixels(rgbdata, nLeds, scale, getDither());
+
+		mWait.wait();
+		showRGBInternal(pixels);
+		mWait.mark();
+	}
+
+	virtual void show(const struct CRGB *rgbdata, int nLeds, CRGB scale) {
+		PixelController<RGB_ORDER> pixels(rgbdata, nLeds, scale, getDither());
+
+		mWait.wait();
+		showRGBInternal(pixels);
+		mWait.mark();
+	}
+
+#ifdef SUPPORT_ARGB
+	virtual void show(const struct CARGB *rgbdata, int nLeds, CRGB scale) {
+		PixelController<RGB_ORDER> pixels(rgbdata, nLeds, scale, getDither());
+		mWait.wait();
+		showRGBInternal(pixels);
+		mWait.mark();
+	}
+#endif
+
+	template<int BITS> __attribute__ ((always_inline)) inline static void writeBits(register uint32_t & next_mark, register data_ptr_t port, register data_t hi, register data_t lo, register uint8_t & b)  {
+		for(register uint32_t i = BITS-1; i > 0; i--) {
+			while(ARM_DWT_CYCCNT < next_mark);
+			next_mark = ARM_DWT_CYCCNT + (T1+T2+T3);
+			FastPin<DATA_PIN>::fastset(port, hi);
+			if(b&0x80) {
+				while((next_mark - ARM_DWT_CYCCNT) > (T3+(2*(F_CPU/24000000))));
+				FastPin<DATA_PIN>::fastset(port, lo);
+			} else {
+				while((next_mark - ARM_DWT_CYCCNT) > (T2+T3+(2*(F_CPU/24000000))));
+				FastPin<DATA_PIN>::fastset(port, lo);
+			}
+			b <<= 1;
+		}
+
+		while(ARM_DWT_CYCCNT < next_mark);
+		next_mark = ARM_DWT_CYCCNT + (T1+T2+T3);
+		FastPin<DATA_PIN>::fastset(port, hi);
+
+		if(b&0x80) {
+			while((next_mark - ARM_DWT_CYCCNT) > (T3+(2*(F_CPU/24000000))));
+			FastPin<DATA_PIN>::fastset(port, lo);
+		} else {
+			while((next_mark - ARM_DWT_CYCCNT) > (T2+T3+(2*(F_CPU/24000000))));
+			FastPin<DATA_PIN>::fastset(port, lo);
+		}
+	}
+
+	// This method is made static to force making register Y available to use for data on AVR - if the method is non-static, then
+	// gcc will use register Y for the this pointer.
+	static uint32_t showRGBInternal(PixelController<RGB_ORDER> & pixels) {
+	    // Get access to the clock
+		ARM_DEMCR    |= ARM_DEMCR_TRCENA;
+		ARM_DWT_CTRL |= ARM_DWT_CTRL_CYCCNTENA;
+		ARM_DWT_CYCCNT = 0;
+
+		register data_ptr_t port = FastPin<DATA_PIN>::port();
+		register data_t hi = *port | FastPin<DATA_PIN>::mask();;
+		register data_t lo = *port & ~FastPin<DATA_PIN>::mask();;
+		*port = lo;
+
+		// Setup the pixel controller and load/scale the first byte
+		pixels.preStepFirstByteDithering();
+		register uint8_t b = pixels.loadAndScale0();
+
+		cli();
+		uint32_t next_mark = ARM_DWT_CYCCNT + (T1+T2+T3);
+
+		while(pixels.has(1)) {
+			pixels.stepDithering();
+			#if (FASTLED_ALLOW_INTERRUPTS == 1)
+			cli();
+			// if interrupts took longer than 45µs, punt on the current frame
+			if(ARM_DWT_CYCCNT > next_mark) {
+				if((ARM_DWT_CYCCNT-next_mark) > ((WAIT_TIME-INTERRUPT_THRESHOLD)*CLKS_PER_US)) { sei(); return ARM_DWT_CYCCNT; }
+			}
+
+			hi = *port | FastPin<DATA_PIN>::mask();
+			lo = *port & ~FastPin<DATA_PIN>::mask();
+			#endif
+			// Write first byte, read next byte
+			writeBits<8+XTRA0>(next_mark, port, hi, lo, b);
+			b = pixels.loadAndScale1();
+
+			// Write second byte, read 3rd byte
+			writeBits<8+XTRA0>(next_mark, port, hi, lo, b);
+			b = pixels.loadAndScale2();
+
+			// Write third byte, read 1st byte of next pixel
+			writeBits<8+XTRA0>(next_mark, port, hi, lo, b);
+			b = pixels.advanceAndLoadAndScale0();
+			#if (FASTLED_ALLOW_INTERRUPTS == 1)
+			sei();
+			#endif
+		};
+
+		sei();
+		return ARM_DWT_CYCCNT;
+	}
+};
+#endif
+
+FASTLED_NAMESPACE_END
+
+#endif