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libraries/FastLED-3.2.9/fastspi_ref.h

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+#ifndef __INC_FASTSPI_ARM_SAM_H
+#define __INC_FASTSPI_ARM_SAM_H
+
+#if 0 // guard against the arduino ide idiotically including every header file
+#include "FastLED.h"
+
+FASTLED_NAMESPACE_BEGIN
+
+// A skeletal implementation of hardware SPI support.  Fill in the necessary code for init, waiting, and writing.  The rest of
+// the method implementations should provide a starting point, even if not hte most efficient to start with
+template <uint8_t _DATA_PIN, uint8_t _CLOCK_PIN, uint8_t _SPI_CLOCK_DIVIDER>
+class REFHardwareSPIOutput {
+	Selectable *m_pSelect;
+public:
+	SAMHardwareSPIOutput() { m_pSelect = NULL; }
+	SAMHArdwareSPIOutput(Selectable *pSelect) { m_pSelect = pSelect; }
+
+	// set the object representing the selectable
+	void setSelect(Selectable *pSelect) { /* TODO */ }
+
+	// initialize the SPI subssytem
+	void init() { /* TODO */ }
+
+	// latch the CS select
+	void inline select() __attribute__((always_inline)) { if(m_pSelect != NULL) { m_pSelect->select(); } }
+
+	// release the CS select
+	void inline release() __attribute__((always_inline)) { if(m_pSelect != NULL) { m_pSelect->release(); } }
+
+	// wait until all queued up data has been written
+	static void waitFully() { /* TODO */ }
+
+	// write a byte out via SPI (returns immediately on writing register)
+	static void writeByte(uint8_t b) { /* TODO */ }
+
+	// write a word out via SPI (returns immediately on writing register)
+	static void writeWord(uint16_t w) { /* TODO */ }
+
+	// A raw set of writing byte values, assumes setup/init/waiting done elsewhere
+	static void writeBytesValueRaw(uint8_t value, int len) {
+		while(len--) { writeByte(value); }
+	}
+
+	// A full cycle of writing a value for len bytes, including select, release, and waiting
+	void writeBytesValue(uint8_t value, int len) {
+		select(); writeBytesValueRaw(value, len); release();
+	}
+
+	// A full cycle of writing a value for len bytes, including select, release, and waiting
+	template <class D> void writeBytes(register uint8_t *data, int len) {
+		uint8_t *end = data + len;
+		select();
+		// could be optimized to write 16bit words out instead of 8bit bytes
+		while(data != end) {
+			writeByte(D::adjust(*data++));
+		}
+		D::postBlock(len);
+		waitFully();
+		release();
+	}
+
+	// A full cycle of writing a value for len bytes, including select, release, and waiting
+	void writeBytes(register uint8_t *data, int len) { writeBytes<DATA_NOP>(data, len); }
+
+	// write a single bit out, which bit from the passed in byte is determined by template parameter
+	template <uint8_t BIT> inline static void writeBit(uint8_t b) { /* TODO */ }
+
+	// write a block of uint8_ts out in groups of three.  len is the total number of uint8_ts to write out.  The template
+	// parameters indicate how many uint8_ts to skip at the beginning and/or end of each grouping
+	template <uint8_t FLAGS, class D, EOrder RGB_ORDER> void writePixels(PixelController<RGB_ORDER> pixels) {
+		select();
+		while(data != end) {
+			if(FLAGS & FLAG_START_BIT) {
+				writeBit<0>(1);
+			}
+			writeByte(D::adjust(pixels.loadAndScale0()));
+			writeByte(D::adjust(pixels.loadAndScale1()));
+			writeByte(D::adjust(pixels.loadAndScale2()));
+
+			pixels.advanceData();
+			pixels.stepDithering();
+			data += (3+skip);
+		}
+		D::postBlock(len);
+		release();
+	}
+
+};
+
+FASTLED_NAMESPACE_END
+
+#endif
+
+#endif
+