diff include/Utilities.h @ 68:59edd5780fef

Changed d-box code to run cleanly when built on board. Updated Makefile to add ne10 include path on board. Some extra docs in Utilities.h

--- a/include/Utilities.h	Fri Jul 17 15:28:18 2015 +0100
+++ b/include/Utilities.h	Fri Jul 17 16:57:08 2015 +0100
@@ -32,8 +32,58 @@
 // Likewise, thread launch should be able to be called from setup()
 // Also, make volume change functions callable from render() thread -- as an aux task?
 
+/**
+ * \brief Read an analog input, specifying the frame number (when to read) and the channel.
+ *
+ * This function returns the value of an analog input, at the time indicated by \c frame.
+ * The returned value ranges from 0 to 1, corresponding to a voltage range of 0 to 4.096V.
+ *
+ * \param context The I/O data structure which is passed by BeagleRT to render().
+ * \param frame Which frame (i.e. what time) to read the analog input. Valid values range
+ * from 0 to (context->analogFrames - 1).
+ * \param channel Which analog input to read. Valid values are between 0 and
+ * (context->analogChannels - 1), typically 0 to 7 by default.
+ * \return Value of the analog input, range 0 to 1.
+ */
 float analogReadFrame(BeagleRTContext *context, int frame, int channel);
+
+/**
+ * \brief Write an analog output, specifying the frame number (when to write) and the channel.
+ *
+ * This function sets the value of an analog output, at the time indicated by \c frame. Valid
+ * values are between 0 and 1, corresponding to the range 0 to 5V.
+ *
+ * The value written will persist for all future frames if BEAGLERT_FLAG_ANALOG_OUTPUTS_PERSIST
+ * is set in context->flags. This is the default behaviour.
+ *
+ * \param context The I/O data structure which is passed by BeagleRT to render().
+ * \param frame Which frame (i.e. what time) to write the analog output. Valid values range
+ * from 0 to (context->analogFrames - 1).
+ * \param channel Which analog output to write. Valid values are between 0 and
+ * (context->analogChannels - 1), typically 0 to 7 by default.
+ * \param value Value to write to the output, range 0 to 1.
+ */
 void analogWriteFrame(BeagleRTContext *context, int frame, int channel, float value);
+
+/**
+ * \brief Write an analog output, specifying the frame number (when to write) and the channel.
+ *
+ * This function sets the value of an analog output, at the time indicated by \c frame. Valid
+ * values are between 0 and 1, corresponding to the range 0 to 5V.
+ *
+ * Unlike analogWriteFrame(), the value written will affect \b only the frame specified, with
+ * future values unchanged. This is more efficient than analogWriteFrame() so is better suited
+ * to applications where every frame will be written to a different value. If
+ * BEAGLERT_FLAG_ANALOG_OUTPUTS_PERSIST is not set within context->flags, then
+ * analogWriteFrameOnce() and analogWriteFrame() are equivalent.
+ *
+ * \param context The I/O data structure which is passed by BeagleRT to render().
+ * \param frame Which frame (i.e. what time) to write the analog output. Valid values range
+ * from 0 to (context->analogFrames - 1).
+ * \param channel Which analog output to write. Valid values are between 0 and
+ * (context->analogChannels - 1), typically 0 to 7 by default.
+ * \param value Value to write to the output, range 0 to 1.
+ */
 void analogWriteFrameOnce(BeagleRTContext *context, int frame, int channel, float value);
 
 int digitalReadFrame(BeagleRTContext *context, int frame, int channel);