OLED driver and demo for Univision oled display 128x64.

Diff: 4spi_oled_ssd1305.h

Revision:

5:6d2aded0cf41

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/4spi_oled_ssd1305.h	Tue Jan 29 09:56:25 2013 +0000
@@ -0,0 +1,143 @@
+// OLED display using SSD1305 driver
+// A library by *spark audio-visual
+
+/* Copyright (c) 2011 Toby Harris, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+ 
+ 
+ /* rewritten to work with the SSD1306 driver JCY-MCU oled (from ebay). chris stevens 2013
+ 
+ */
+ 
+
+#ifndef SPK_OLED_SSD1305_h
+#define SPK_OLED_SSD1305_h
+
+#include "mbed.h"
+#include <string>
+
+#define bufferCount 1024
+#define bufferWidth 128
+#define pixelWidth 128
+#define pixelHeight 64
+#define pixInPage 8
+#define pageCount 8
+
+
+
+/** Display class for 128x64 OLEDs using the SSD1305 driver, connected via SPI
+  *
+  * Display ie. DENSITRON - DD-12864YO-3A
+  *
+  * This is a ground-up, minimal library. Further functionality as and when its needed or anybody wants to contribute.
+  *
+  * This library includes two processing sketches to create a font and full-screen image in the required byte representations.
+  * Without creating your font and any images, all this library will do is blank the screen and draw horizontal lines. But at least you'll know its working!
+  *
+  * Terminology:
+  * 'rows' are 8 pixel high rows across the display, 0 being the topmost and 7 the bottom.
+  * 'lines' are single pixel lines, origin top left.
+  *
+*/
+class SPKDisplay
+{
+public:
+    /** Create a display object connected via SPI
+     *
+     * @param mosi  SPI MOSI
+     * @param clk   SPI SCK
+     * @param cs    Chip Select - a digital out pin
+     * @param dc    Data/Command - a digital out pin
+     * @param res   Reset - a digital out pin
+     * @param debugSerial An optional serial object to log to
+     */
+    SPKDisplay(PinName mosi, PinName clk, PinName cs, PinName dc, PinName res, Serial *debugSerial = NULL);
+
+    /** Font - Assign the ASCII value of the character at the start of the implemented range */
+    const int *fontStartCharacter;
+
+    /** Font - Assign the ASCII value of the character at the end of the implemented range */
+    const int *fontEndCharacter;
+
+    /** Font - Assign the font, an array of 8x8px characters
+     *
+     * @note The processing sketch spk_oled_fontByteMaker--processing takes characterCount*8px x 8px images and creates the code to declare the font array needed by this method
+     */
+    uint8_t const **fontCharacters;
+
+    // set display for black on white
+    void inverse();
+
+// display a welcopme message encoded in tab0 in  spk_ole_ssd1305.h 
+    void welcome();
+    // output the entire font as a bitmap
+    void fontdemo();
+    
+    //set display for white on black (normal state after reset)
+    void normal();
+
+    // power on / power off the display - this puts the display to sleep - but doesn turn off tha actuall power pin.
+    void displayPower(int P);
+
+    /** Completely clear the object's display representation */
+    void clearBuffer();
+
+    /** Clear a row of the object's display representation
+     *
+     * @param row The row to clear.
+     */
+    void clearBufferRow(int row);
+
+    /** Replace the object\s display representation with the contents of image
+     *
+     * @param image An array of 1056 bytes representing an image.
+     * @note The processing sketch spk_oled_screenByteMaker--processing takes 132x64 images and creates the code to declare such arrays
+     */
+    void imageToBuffer(const uint8_t* image);
+
+    /** Draw a horizontal line in the object's display representation
+     *
+     * @param y The y position of the line to draw
+     */
+    void horizLineToBuffer(int y);
+
+
+    /** Send the object's display representation to the OLED
+     *
+     * You can safely call this once per main loop, it will only transmit the buffer contents if there has been an update
+     */
+    void sendBuffer();
+    
+// send text to the buffer to write inthe tiny 5x7 font
+void textToBuffer(char *message, int row);
+
+private:
+    SPI *spi;
+    DigitalOut *cs;
+    DigitalOut *dc;
+    DigitalOut *res;
+
+    Serial *debug;
+    uint8_t buffer[bufferCount];
+
+    bool bufferHasChanged;
+
+    void setup();
+};
+
+#endif