my9221: C implementation; C example; C++ wraps C

Signed-off-by: Jon Trulson <jtrulson@ics.com>

src/my9221/my9221.hpp

@@ -35,118 +35,96 @@
 #pragma once
 
 #include <string>
-#include <mraa/common.hpp>
-#include <mraa/gpio.hpp>
+#include <my9221.h>
 
 namespace upm {
 
-  /**
-   * @brief MY9221 LED Controller library
-   * @defgroup my9221 libupm-my9221
-   * @ingroup seeed display gpio eak
-   */
-  class MY9221 {
-  public:
-
-    // 12 LED channels per chip (instance)
-    static const int LEDS_PER_INSTANCE = 12;
-
     /**
-     * Instantiates an MY9221 object
-     *
-     * @param dataPin Data pin
-     * @param clockPin Clock pin
-     * @param instances Number of daisy-chained my9221s, default 1
+     * @brief MY9221 LED Controller library
+     * @defgroup my9221 libupm-my9221
+     * @ingroup seeed display gpio eak
      */
-    MY9221(uint8_t dataPin, uint8_t clockPin, int instances=1);
+    class MY9221 {
+    public:
 
-    /**
-     * MY9221 destructor
-     */
-    virtual ~MY9221();
+        /**
+         * Instantiates an MY9221 object
+         *
+         * @param dataPin Data pin
+         * @param clockPin Clock pin
+         * @param instances Number of daisy-chained my9221s, default 1
+         */
+        MY9221(uint8_t dataPin, uint8_t clockPin, int instances=1);
 
-    /**
-     * Enable or disable auto refresh.  When auto refresh is enabled,
-     * update the LED display as soon as the internal state changes.
-     * When false, the display(s) will not be updated until the
-     * refresh() method is called.
-     *
-     * @param enable true to enable auto refresh, false otherwise
-     */
-    void setAutoRefresh(bool enable)
-    {
-      m_autoRefresh = enable;
-    }
+        /**
+         * MY9221 destructor
+         */
+        virtual ~MY9221();
 
-    /**
-     * Set an LED to a specific on (high intensity) or off (low
-     * intensity) value.
-     *
-     * @param led The LED whose state you wish to change
-     * @param on true to turn on the LED, false to turn the LED off
-     */
-    void setLED(int led, bool on);
+        /**
+         * Enable or disable auto refresh.  When auto refresh is enabled,
+         * update the LED display as soon as the internal state changes.
+         * When false, the display(s) will not be updated until the
+         * refresh() method is called.
+         *
+         * @param enable true to enable auto refresh, false otherwise
+         */
+        void setAutoRefresh(bool enable)
+        {
+            my9221_set_auto_refresh(m_my9221, enable);
+        }
 
-    /**
-     * Set the greyscale intensity of an LED in the OFF state.  The
-     * intensity is a value from 0 (fully off) to 255 (fully on).
-     * This will take effect on any future LED set or clear
-     * operations.
-     *
-     * @param intensity a value from 0 (fully off) to 255 (fully on)
-     */
-    void setLowIntensityValue(int intensity);
+        /**
+         * Set an LED to a specific on (high intensity) or off (low
+         * intensity) value.
+         *
+         * @param led The LED whose state you wish to change
+         * @param on true to turn on the LED, false to turn the LED off
+         */
+        void setLED(int led, bool on);
 
-    /**
-     * Set the greyscale intensity of an LED in the ON state.  The
-     * intensity is a value from 0 (fully off) to 255 (fully on).
-     * This will take effect on any future LED set or clear
-     * operations.
-     *
-     * @param intensity a value from 0 (fully off) to 255 (fully on)
-     */
-    void setHighIntensityValue(int intensity);
+        /**
+         * Set the greyscale intensity of an LED in the OFF state.  The
+         * intensity is a value from 0 (fully off) to 255 (fully on).
+         * This will take effect on any future LED set or clear
+         * operations.
+         *
+         * @param intensity a value from 0 (fully off) to 255 (fully on)
+         */
+        void setLowIntensityValue(int intensity);
 
-    /**
-     * Set all of the LEDS to the ON (high intensity value) state.
-     */
-    void setAll();
+        /**
+         * Set the greyscale intensity of an LED in the ON state.  The
+         * intensity is a value from 0 (fully off) to 255 (fully on).
+         * This will take effect on any future LED set or clear
+         * operations.
+         *
+         * @param intensity a value from 0 (fully off) to 255 (fully on)
+         */
+        void setHighIntensityValue(int intensity);
 
-    /**
-     * Set all of the LEDS to the OFF (low intensity value) state.
-     */
-    void clearAll();
+        /**
+         * Set all of the LEDS to the ON (high intensity value) state.
+         */
+        void setAll();
 
-    /**
-     * Set the LED states to match the internal stored states.  This
-     * is useful when auto refresh (setAutoRefresh()) is false to
-     * update the display.
-     */
-    void refresh();
+        /**
+         * Set all of the LEDS to the OFF (low intensity value) state.
+         */
+        void clearAll();
 
-  protected:
-    virtual void lockData();
-    virtual void send16bitBlock(uint16_t data);
+        /**
+         * Set the LED states to match the internal stored states.  This
+         * is useful when auto refresh (setAutoRefresh()) is false to
+         * update the display.
+         */
+        void refresh();
 
-    bool m_autoRefresh;
-    // we're only doing 8-bit greyscale, so the high order bits are
-    // always 0
-    uint16_t m_lowIntensity;
-    uint16_t m_highIntensity;
+    protected:
 
-    unsigned int m_instances;
+        my9221_context m_my9221;
 
-    mraa::Gpio m_gpioData;
-    mraa::Gpio m_gpioClk;
-
-    // an array of uint16_t's representing our bit states (on/off)
-    // intensities.  Only the low 8 bits are used, but in the future
-    // 16bit support can work here as well.
-    uint16_t *m_bitStates;
-
-    uint16_t m_commandWord;
-
-  private:
-  };
+    private:
+    };
 
 }