Mario Poneder / TFT_TouchPanel

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TouchPanel.h@1:007113101ef7, 2014-01-28 (annotated)

Committer:
MarioPoneder
Date:
Tue Jan 28 13:16:36 2014 +0000
Revision:
1:007113101ef7
Parent:
0:e38c94c549f4 
good doc

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MarioPoneder 0:e38c94c549f4 1 #ifndef __TOUCHPANEL_H__
MarioPoneder 0:e38c94c549f4 2 #define __TOUCHPANEL_H__
MarioPoneder 0:e38c94c549f4 3
MarioPoneder 0:e38c94c549f4 4 #include "mbed.h"
MarioPoneder 0:e38c94c549f4 5 #include "math.h"
MarioPoneder 0:e38c94c549f4 6
MarioPoneder 0:e38c94c549f4 7 /******************************************************************************/
MarioPoneder 0:e38c94c549f4 8 /****************************** TouchPanel ************************************/
MarioPoneder 0:e38c94c549f4 9 /******************************************************************************/
MarioPoneder 0:e38c94c549f4 10
MarioPoneder 0:e38c94c549f4 11 /* The touch panel is polled in 50ms intervals. */
MarioPoneder 0:e38c94c549f4 12 #define POLLING_INVERVAL 0.05f
MarioPoneder 0:e38c94c549f4 13
MarioPoneder 0:e38c94c549f4 14 /* X or Y coordinate if no touch was detected. */
MarioPoneder 0:e38c94c549f4 15 #define NO_TOUCH_VAL 0xFFFF
MarioPoneder 0:e38c94c549f4 16
MarioPoneder 0:e38c94c549f4 17 /* If the absolute value of the difference between the values of coherent
MarioPoneder 0:e38c94c549f4 18 * +/- inputs pins does not exceed this value the panel was touched. */
MarioPoneder 0:e38c94c549f4 19 #define TOUCH_THRESHOLD 0.005f
MarioPoneder 0:e38c94c549f4 20
MarioPoneder 0:e38c94c549f4 21 /* The width of the TFT display in px. */
MarioPoneder 0:e38c94c549f4 22 #define WIDTH 320
MarioPoneder 0:e38c94c549f4 23 /* The height of the TFT display in px. */
MarioPoneder 0:e38c94c549f4 24 #define HEIGHT 240
MarioPoneder 0:e38c94c549f4 25
MarioPoneder 0:e38c94c549f4 26 /* Border calibration constants. */
MarioPoneder 0:e38c94c549f4 27 #define TOP 0.8f // Y coordinate
MarioPoneder 0:e38c94c549f4 28 #define BOTTOM 0.2f // Y coordindate
MarioPoneder 0:e38c94c549f4 29 #define LEFT 0.12f // X coordinate
MarioPoneder 0:e38c94c549f4 30 #define RIGHT 0.89f // X coordinate
MarioPoneder 0:e38c94c549f4 31
MarioPoneder 0:e38c94c549f4 32 /***************************************************************************//**
MarioPoneder 1:007113101ef7 33 * @brief TouchPanel driver for the TFT color display MI0283QT-9A (320x240).
MarioPoneder 1:007113101ef7 34 * @author Mario Poneder
MarioPoneder 1:007113101ef7 35 * @date 28/01/2014
MarioPoneder 0:e38c94c549f4 36 *******************************************************************************/
MarioPoneder 0:e38c94c549f4 37 class TouchPanel
MarioPoneder 0:e38c94c549f4 38 {
MarioPoneder 1:007113101ef7 39 typedef void (*pTouchCallback_t)(unsigned short, unsigned short);
MarioPoneder 1:007113101ef7 40
MarioPoneder 0:e38c94c549f4 41 private:
MarioPoneder 0:e38c94c549f4 42
MarioPoneder 0:e38c94c549f4 43 PinName xPos; // X+ pin
MarioPoneder 0:e38c94c549f4 44 PinName xNeg; // X- pin
MarioPoneder 0:e38c94c549f4 45 PinName yPos; // Y+ pin
MarioPoneder 0:e38c94c549f4 46 PinName yNeg; // Y- pin
MarioPoneder 0:e38c94c549f4 47
MarioPoneder 0:e38c94c549f4 48 DigitalOut *xPosOut; // X+ out
MarioPoneder 0:e38c94c549f4 49 DigitalOut *xNegOut; // X- out
MarioPoneder 0:e38c94c549f4 50 DigitalOut *yPosOut; // Y+ out
MarioPoneder 0:e38c94c549f4 51 DigitalOut *yNegOut; // Y- out
MarioPoneder 0:e38c94c549f4 52
MarioPoneder 0:e38c94c549f4 53 AnalogIn *xPosIn; // X+ in
MarioPoneder 0:e38c94c549f4 54 AnalogIn *xNegIn; // X- in
MarioPoneder 0:e38c94c549f4 55 AnalogIn *yPosIn; // Y+ in
MarioPoneder 0:e38c94c549f4 56 AnalogIn *yNegIn; // Y- in
MarioPoneder 0:e38c94c549f4 57
MarioPoneder 0:e38c94c549f4 58 Ticker pollPanelTicker; // Calls the PollPanel method in specified intervals.
MarioPoneder 0:e38c94c549f4 59 pTouchCallback_t touchCallbackFunction;
MarioPoneder 0:e38c94c549f4 60 bool xy;
MarioPoneder 0:e38c94c549f4 61
MarioPoneder 0:e38c94c549f4 62 void PrepareYRead(void);
MarioPoneder 0:e38c94c549f4 63 void PrepareXRead(void);
MarioPoneder 0:e38c94c549f4 64 void PollPanel(void);
MarioPoneder 0:e38c94c549f4 65
MarioPoneder 0:e38c94c549f4 66 public:
MarioPoneder 1:007113101ef7 67
MarioPoneder 0:e38c94c549f4 68 TouchPanel(PinName xPos, PinName xNeg, PinName yPos, PinName yNeg);
MarioPoneder 0:e38c94c549f4 69 void SetTouchCallbackFunction(pTouchCallback_t touchCallbackFunction);
MarioPoneder 0:e38c94c549f4 70 };
MarioPoneder 0:e38c94c549f4 71
MarioPoneder 0:e38c94c549f4 72 #endif /* __TOUCHPANEL_H__ */