Diff: screen/EALCD.h

Revision:

0:839ecbf5cb2a

Child:

1:f04bcaea1d60

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/screen/EALCD.h	Thu Feb 11 12:21:18 2010 +0000
@@ -0,0 +1,116 @@
+// Copyright 2010 Richard Parker
+
+#ifndef MBED_EALCD_H
+#define MBED_EALCD_H
+
+#include "mbed.h"
+
+#include "../graphics/EAPen.h"
+#include "../graphics/EABrush.h"
+#include "../graphics/EAFont.h"
+#include "../widgets/EAImage.h"
+
+class EATouch;
+class EAImage;
+
+/**
+ * Class encapsulating the EA LCD.
+ * @author Richard Parker
+ */
+class EALCD
+{
+public:
+    friend EATouch;
+    friend EAImage;
+
+    EALCD(  PinName LED_PWM,
+            PinName LCD_RS, 
+            PinName LCD_SO, 
+            PinName LCD_SI, 
+            PinName LCD_SCL,
+            PinName LCD_CS,
+            PinName TCH_CS);
+    ~EALCD();
+    
+    /**
+     * Sets the brightness of the display by adjusting the backlight power.
+     * @param    percentage    A value between 0.0 - 1.0 (fully off - fully on).
+     */
+    void setBrightness(float percentage);
+    
+    void clearScreen();
+    void drawPoint(short x, short y);
+    void drawLine(short x0, short y0, short x0, short y0);
+    void drawFilledRect(short x, short y, unsigned short w, unsigned short h);
+    void drawRect(short x, short y, unsigned short w, unsigned short h);
+    void drawEllipse(short x, short y, unsigned short w, unsigned short h);
+    void drawFilledEllipse(short x, short y, unsigned short w, unsigned short h);
+    void drawImage(unsigned short x, unsigned short y, EAImage& img);
+    void drawText(unsigned short x, unsigned short y, char* text); 
+    
+    inline unsigned short width() const { return 320; }
+    inline unsigned short height() const { return 240; }
+    
+    inline void setPen(const EAPen& pen) { _pen = pen; }
+    inline const EAPen& pen() { return _pen; }
+      
+    inline void setBrush(const EABrush& brush) { _brush = brush; }
+    inline const EABrush& brush() { return _brush; }
+
+    inline void setFont(const EAFont& font) { _font = font; }
+    inline const EAFont& font() { return _font; }
+
+protected:
+    void _getTouch(unsigned short& x, unsigned short& y, unsigned short& z1, unsigned short& z2);
+
+private:
+    /**
+     * PWM control for the backlight.
+     */
+    PwmOut _backlight;
+    
+    /**
+     * 4 wire spi interface for spi comms.
+     */
+    SPI _comm;
+    DigitalOut _rs;
+    DigitalOut _cs;
+    
+    /**
+     * Chip select for the touch screen.
+     */
+    DigitalOut _tch_cs;
+       
+    /**
+     * Graphic helper to store the current pen.
+     */
+    EAPen _pen;
+    
+    /**
+     * Graphic helper to store the current brush.
+     */
+    EABrush _brush;
+    
+    /**
+     * Graphic helper to store the current font.
+     */
+    EAFont _font;
+
+    void _swap(short& i, short& j);
+
+    void _writeToDisplay(unsigned short data);
+    void _writeToRegister(unsigned short addr, unsigned short data);
+    
+    void _initialise();
+
+    void _moveTo(short x, short y);
+    void _window(short x, short y, unsigned short w, unsigned short h);
+    
+    void _drawPoint(short x, short y, unsigned short c);
+    void _drawLine(short x0, short y0, short x0, short y0, unsigned short c);
+    void _drawEllipse(short cX, short cY, unsigned short w, unsigned short h, bool filled);
+    void _draw4EllipsePoints(short cX, short cY, short x, short y, bool filled);
+
+};
+
+#endif
\ No newline at end of file