Diff: Drivers/SSD1306_SPI.h

Revision:

1:f7003ec66a51

Child:

2:bbfc18022ee5

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Drivers/SSD1306_SPI.h	Fri Mar 14 19:17:44 2014 +0000
@@ -0,0 +1,122 @@
+/* NeatGUI Library
+ * Copyright (c) 2013 Neil Thiessen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SSD1306_SPI_H
+#define SSD1306_SPI_H
+
+#include "mbed.h"
+#include "Display.h"
+
+/** SSD1306_SPI class.
+ *  Used for controlling an SSD1306-based OLED display connected to SPI.
+ */
+class SSD1306_SPI : public Display
+{
+public:
+
+    /** Create an SSD1306 object connected to the specified SPI pins with the specified /CS and DC pins
+     *
+     * @param mosi The SPI data out pin.
+     * @param miso The SPI data in pin.
+     * @param sclk The SPI clock pin.
+     * @param sclk The SPI chip select pin.
+     * @param sclk The data/command pin.
+     */
+    SSD1306_SPI(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName dc);
+
+    /** Probe for the SSD1306 and initialize it if present
+     *
+     * @returns
+     *   'true' if the device exists on the bus,
+     *   'false' if the device doesn't exist on the bus.
+     */
+    virtual bool open();
+
+    /** Send the buffer to the SSD1306
+     */
+    virtual void finalize();
+
+    /** Get the current state of the SSD1306
+     *
+     * @returns The current state as a Display::State enum.
+     */
+    virtual Display::State state();
+
+    /** Set the state of the SSD1306
+     *
+     * @param mode The new state as a Display::State enum.
+     */
+    virtual void state(State s);
+
+    //void display();
+
+    /** Draw a single pixel at the specified coordinates
+    *
+    * @param x The X coordinate.
+    * @param y The Y coordinate.
+    * @param c The color of the pixel as a 32-bit ARGB value.
+    */
+    virtual void drawPixel(int x, int y, unsigned int c);
+
+private:
+    //Commands
+    enum Command {
+        CMD_SETCONTRAST                             = 0x81,
+        CMD_DISPLAYALLON_RESUME                     = 0xA4,
+        CMD_DISPLAYALLON                            = 0xA5,
+        CMD_NORMALDISPLAY                           = 0xA6,
+        CMD_INVERTDISPLAY                           = 0xA7,
+        CMD_DISPLAYOFF                              = 0xAE,
+        CMD_DISPLAYON                               = 0xAF,
+        CMD_SETDISPLAYOFFSET                        = 0xD3,
+        CMD_SETCOMPINS                              = 0xDA,
+        CMD_SETVCOMDETECT                           = 0xDB,
+        CMD_SETDISPLAYCLOCKDIV                      = 0xD5,
+        CMD_SETPRECHARGE                            = 0xD9,
+        CMD_SETMULTIPLEX                            = 0xA8,
+        CMD_SETLOWCOLUMN                            = 0x00,
+        CMD_SETHIGHCOLUMN                           = 0x10,
+        CMD_SETSTARTLINE                            = 0x40,
+        CMD_MEMORYMODE                              = 0x20,
+        CMD_COMSCANINC                              = 0xC0,
+        CMD_COMSCANDEC                              = 0xC8,
+        CMD_SEGREMAP                                = 0xA0,
+        CMD_CHARGEPUMP                              = 0x8D,
+        CMD_CHARGEPUMPON                            = 0x14,
+        CMD_CHARGEPUMPOFF                           = 0x10,
+        CMD_ACTIVATE_SCROLL                         = 0x2F,
+        CMD_DEACTIVATE_SCROLL                       = 0x2E,
+        CMD_SET_VERTICAL_SCROLL_AREA                = 0xA3,
+        CMD_RIGHT_HORIZONTAL_SCROLL                 = 0x26,
+        CMD_LEFT_HORIZONTAL_SCROLL                  = 0x27,
+        CMD_VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL    = 0x29,
+        CMD_VERTICAL_AND_LEFT_HORIZONTAL_SCROLL     = 0x2A
+    };
+
+    //SPI interface variables
+    SPI m_SPI;
+    DigitalOut m_CS;
+    DigitalOut m_DC;
+
+    //Back buffer
+    char m_Buffer[1024];
+
+    //Command and data helpers
+    void writeCommand(char command);
+    void writeData(char data);
+};
+
+#endif