Create AD9850.h

AD9850.h

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+/******************************************************************************************************************
+ * Arduino library for AD9850
+ * Created 23/08/2014
+ * Christophe Caiveau f4goj@free.fr 
+ *
+ * Use this library freely
+ *
+ * Hardware connections : 
+ * W_CLK   -> any pin
+ * FQ_UD   -> any pin
+ * DATA/D7 -> any pin
+ * RESET   -> any pin
+ *
+ * Functions :
+ * dds.begin(W_CLK pin, FQ_UD pin, DATA pin, RESET pin); Initialize the output pins and master reset the AD9850 
+ * dds.calibrate(frequency); Compensation of crystal oscillator frequency
+ * dds.setfreq(frequency,phase); frequency in Hz, phase coded on 5 bits
+ * dds.down(); power down mode reducing the dissipated power from 380mW to 30mW @5V
+ * dds.up(); wake-up the AD9850
+ *
+ * AD9850 datasheet at http://www.analog.com/static/imported-files/data_sheets/AD9850.pdf
+ *
+ *****************************************************************************************************************/
+
+
+#ifndef AD9850_H
+#define AD9850_H
+#include <Arduino.h>
+
+class AD9850
+{
+	public:
+  	AD9850();
+
+	void begin(int w_clk, int fq_ud, int data, int reset);
+	void setfreq(double f, uint8_t p);
+	void down();
+	void up();
+	void calibrate(double TrimFreq);
+
+	private:
+	int W_CLK;
+	int FQ_UD;
+	int DATA;
+	int RESET;
+	uint32_t deltaphase;
+	uint8_t phase;
+	void update();
+	void begin_priv();
+	void pulse(int pin);
+	double calibFreq;
+};
+
+extern AD9850 DDS;
+
+#endif