Diff: EaEpaper.h

Revision:

0:fedcef5319f5

Child:

1:90d18805a8a4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/EaEpaper.h	Sat Nov 09 23:37:43 2013 +0000
@@ -0,0 +1,260 @@
+/* mbed library for 264*176 pixel 2.7 INCH E-PAPER DISPLAY from Pervasive Displays
+ * Copyright (c) 2013 Peter Drescher - DC2PD
+ *
+ * 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.
+ */
+
+
+// 09.11.2013   initial Version
+
+#ifndef EAEPAPER_H
+#define EAEPAPER_H
+
+/**
+ * Includes
+ */
+#include "mbed.h"
+#include "EPD.h"
+#include "GraphicsDisplay.h"
+
+// we have to double buffer the display  
+#define EA_IMG_BUF_SZ (5808) // 264 x 176 / 8 = 5808
+
+/** Draw mode
+  * NORMAl
+  * XOR set pixel by xor of the screen
+  */
+enum {NORMAL,XOR};
+
+/** Bitmap
+ */
+struct Bitmap{
+    int xSize;
+    int ySize;
+    int Byte_in_Line;
+    char* data;
+    };
+
+/* color definitions   */
+#define Black           0x0
+#define White           0x1   
+
+/** Display control class, based on GraphicsDisplay and TextDisplay
+ *
+ * Example:
+ * @code
+ * #include "mbed.h"
+ * #include "EaEpaper.h"
+ * #include "Arial28x28.h" 
+ * #include "Arial12x12.h"
+ * #include "font_big.h"
+ * #include "graphics.h"
+
+ * // the E-Paper board from embedded artists has a LM75 temp sensor to compensate the temperature effect. If it is cold the display reacts slower.
+ * // The LM75 need a I2C -> 2 pins : sda and scl 
+ * // The display data is written via SPI -> 3 pins : mosi,miso,sck
+ * // There are also some control signals 
+ * // The pwm pin has to be connected to a PWM enabled pin : pwm
+ * // The other signals are connected to normal IO`s
+ * //              
+ * EaEpaper epaper(PTD7,            // PWR_CTRL
+ *                 PTD6,            // BORDER
+ *                 PTE31,           // DISCHARGE
+ *                 PTA17,           // RESET_DISP
+ *                 PTA16,           // BUSY
+ *                 PTC17,           // SSEL
+ *                 PTD4,            // PWM
+ *                 PTD2,PTD3,PTD1,  // MOSI,MISO,SCLK
+ *                 PTE0,PTE1);      // SDA,SDL 
+ *
+ * int main() {
+ *
+ *   epaper.cls();                                  // clear screen                        
+ *   epaper.set_font((unsigned char*) Arial28x28);  // select the font
+ *   epaper.locate(5,20);                           // set cursor
+ *   epaper.printf("Hello Mbed");                   // print text
+ *   epaper.rect(3,15,150,50,1);                    // draw frame
+ *   epaper.write_disp();                           // update screen
+ *
+ * @endcode
+ */
+ 
+
+class EaEpaper : public GraphicsDisplay  {
+
+public:
+
+    /**
+     * Constructor.
+     */ 
+    EaEpaper(PinName p_on, PinName border, PinName discharge, PinName reset, PinName busy, PinName cs,  // IO-Pins
+             PinName pwm,                                                                               // PWM Pin        
+             PinName mosi, PinName miso, PinName sck,                                                   // SPI
+             PinName sda, PinName scl,                                                                  // I2C
+             const char* name ="E_Paper");
+    
+    /** Get the width of the screen in pixel
+      *
+      * @param
+      * @returns width of screen in pixel
+      *
+      */
+    virtual int width();
+
+    /** Get the height of the screen in pixel
+     *
+     * @returns height of screen in pixel
+     *
+     */
+    virtual int height();
+    
+    
+    /**
+     * Clear the display
+     */    
+    void clear();
+    
+    /**
+     * Write image buffer to display
+     */    
+    void write_disp(void);
+    
+    /**
+     * set or reset a single pixel
+     *
+     * @param x horizontal position
+     * @param y vertical position
+     * @param color : 0 white, 1 black
+     */ 
+    virtual void pixel(int x, int y, int color);
+    
+    /** Fill the screen with white
+     *
+     */ 
+    virtual void cls(void);
+    
+    /** draw a 1 pixel line
+     *
+     * @param x0,y0 start point
+     * @param x1,y1 stop point
+     * @param color  : 0 white, 1 black
+     */  
+    void line(int x0, int y0, int x1, int y1, int color);
+    
+    /** draw a rect
+     *
+     * @param x0,y0 top left corner
+     * @param x1,y1 down right corner
+     * @param color : 0 white, 1 black
+     */    
+    void rect(int x0, int y0, int x1, int y1, int color);
+    
+    /** draw a filled rect
+     *
+     * @param x0,y0 top left corner
+     * @param x1,y1 down right corner
+     * @param color : 0 white, 1 black
+     */  
+    void fillrect(int x0, int y0, int x1, int y1, int color);
+    
+    /** draw a circle
+     *
+     * @param x0,y0 center
+     * @param r radius
+     * @param color : 0 white, 1 black                                                          *
+     */    
+    void circle(int x0, int y0, int r, int color);
+    
+    /** draw a filled circle
+     *
+     * @param x0,y0 center
+     * @param r radius
+     * @param color : 0 white, 1 black                                                                 *
+     */  
+    void fillcircle(int x0, int y0, int r, int color);
+    
+    /** set drawing mode
+     *  @param NORMAL : paint normal color, XOR : paint XOR of current pixels
+     */
+    void setmode(int mode);
+    
+    /** setup cursor position
+     *
+     * @param x x-position (top left)
+     * @param y y-position 
+     */   
+    virtual void locate(int x, int y);
+    
+    /** calculate the max number of char in a line
+     *
+     * @returns max columns
+     * depends on actual font size
+     */ 
+    virtual int columns();
+    
+    /** calculate the max number of columns
+     *
+     * @returns max column
+     * depends on actual font size
+     */   
+    virtual int rows();
+    
+    /** put a char on the screen
+     *
+     * @param value char to print
+     * @returns printed char
+     */
+    virtual int _putc(int value);
+    
+    /** paint a character on given position out of the active font to the screen buffer
+     *
+     * @param x x-position (top left)
+     * @param y y-position 
+     * @param c char code
+     */
+    virtual void character(int x, int y, int c);
+    
+    /** select the font to use
+     *
+     * @param f pointer to font array 
+     *                                                                              
+     *   font array can created with GLCD Font Creator from http://www.mikroe.com
+     *   you have to add 4 parameter at the beginning of the font array to use: 
+     *   - the number of byte / char
+     *   - the vertial size in pixel
+     *   - the horizontal size in pixel
+     *   - the number of byte per vertical line
+     *   you also have to change the array to char[]
+     */  
+    void set_font(unsigned char* f);
+    
+    /** print bitmap to buffer
+      *
+      * @param bm struct Bitmap in flash
+      * @param x  x start
+      * @param y  y start 
+      *
+      */
+    void print_bm(Bitmap bm, int x, int y);
+    
+    
+    unsigned char* font;
+    unsigned int draw_mode;
+    
+ private:
+    
+    EPD_Class epd_;
+    I2C i2c_;
+    unsigned int char_x;
+    unsigned int char_y;
+    int32_t readTemperature();
+    
+};
+ 
+ #endif /* EAEPAPER_H */
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