Diff: TouchPanel.h

Revision:

0:e38c94c549f4

Child:

1:007113101ef7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TouchPanel.h	Tue Jan 28 10:55:53 2014 +0000
@@ -0,0 +1,82 @@
+/***************************************************************************//**
+ * @file   TouchPanel.h
+ * @brief  Header of the touch panel driver for the
+ *         TFT color display MI0283QT-9A (320x240).
+ * @author Mario Poneder
+ * @date   28/01/2013
+*******************************************************************************/
+
+#ifndef __TOUCHPANEL_H__
+#define __TOUCHPANEL_H__
+
+/******************************************************************************/
+/***************************** Include Files **********************************/
+/******************************************************************************/
+#include "mbed.h"
+#include "math.h"
+
+/******************************************************************************/
+/****************************** TouchPanel ************************************/
+/******************************************************************************/
+
+/* The touch panel is polled in 50ms intervals. */
+#define POLLING_INVERVAL    0.05f
+
+/* X or Y coordinate if no touch was detected. */
+#define NO_TOUCH_VAL        0xFFFF
+
+/* If the absolute value of the difference between the values of coherent
+ * +/- inputs pins does not exceed this value the panel was touched. */
+#define TOUCH_THRESHOLD     0.005f
+
+/* The width of the TFT display in px. */
+#define WIDTH               320
+/* The height of the TFT display in px. */
+#define HEIGHT              240
+
+/* Border calibration constants. */
+#define TOP                 0.8f    // Y coordinate
+#define BOTTOM              0.2f    // Y coordindate
+#define LEFT                0.12f   // X coordinate
+#define RIGHT               0.89f   // X coordinate
+
+/***************************************************************************//**
+ * @brief Specifies the prototype of the touch callback function.
+ *        Example: void TouchCallback(unsigned short x, unsigned short y);
+*******************************************************************************/
+typedef void (*pTouchCallback_t)(unsigned short, unsigned short);
+
+class TouchPanel
+{
+private:
+
+    PinName xPos;           // X+ pin
+    PinName xNeg;           // X- pin
+    PinName yPos;           // Y+ pin
+    PinName yNeg;           // Y- pin
+
+    DigitalOut *xPosOut;    // X+ out
+    DigitalOut *xNegOut;    // X- out
+    DigitalOut *yPosOut;    // Y+ out
+    DigitalOut *yNegOut;    // Y- out
+    
+    AnalogIn *xPosIn;       // X+ in
+    AnalogIn *xNegIn;       // X- in
+    AnalogIn *yPosIn;       // Y+ in
+    AnalogIn *yNegIn;       // Y- in
+    
+    Ticker pollPanelTicker; // Calls the PollPanel method in specified intervals.
+    pTouchCallback_t touchCallbackFunction;
+    bool xy;
+    
+    void PrepareYRead(void);
+    void PrepareXRead(void);
+    void PollPanel(void);
+
+public:
+
+    TouchPanel(PinName xPos, PinName xNeg, PinName yPos, PinName yNeg);
+    void SetTouchCallbackFunction(pTouchCallback_t touchCallbackFunction);
+};
+
+#endif /* __TOUCHPANEL_H__ */