added data structures

added audio support
added rfid support
added spi support

ext/audio/WaveHeader.h

@@ -0,0 +1,40 @@
+#ifndef WAVE_HEADER_H
+#define WAVE_HEADER_H
+
+namespace Wave {
+
+	enum AudioFormat {
+		PCM = 0x01,
+		IMA_ADPCM = 0x11,
+		MP3 = 0x55,
+	};
+
+	struct Header {
+
+		uint32_t chunkID;
+		uint32_t chunkSize;										// file-size - 8
+		char format[4] =			{'W', 'A', 'V', 'E'};
+
+		char subChunk1ID[4] =		{'f', 'm', 't', ' '};
+		uint32_t subChunk1Size = 20;
+
+		uint16_t audioFormat = AudioFormat::PCM;
+		uint16_t numChannels = 1;
+		uint32_t sampleRate = 22050;
+		uint32_t byteRate = sampleRate * 256 / 505;
+		uint16_t blockAlign = 0x100;
+		uint16_t bitsPerSample = 8;
+
+		uint16_t byteExtraData = 2;
+		uint16_t extraData = 505;								// samples-per-block. see byteRate
+
+		char subChunk2ID[4] =		{'f', 'a', 'c', 't'};
+		uint32_t subChunk2Size = 4;
+		uint32_t numOfSamples = 0xFFFFFFFF;						// play forever
+
+		char subChunk3ID[4] =		{'d', 'a', 't', 'a'};
+		uint32_t subChunk3Size = 0xFFFFFFFF;					// file-size - 60
+
+	};
+
+#endif