Richard Parker
/
EALCD
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screen/EATouch.h@2:2b860e764545, 2010-03-28 (annotated)
- Committer:
- richardparker
- Date:
- Sun Mar 28 20:15:15 2010 +0000
- Revision:
- 2:2b860e764545
- Parent:
- 1:f04bcaea1d60
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| richardparker | 0:839ecbf5cb2a | 1 | // Copyright 2010 Richard Parker |
| richardparker | 0:839ecbf5cb2a | 2 | |
| richardparker | 0:839ecbf5cb2a | 3 | #ifndef MBED_EATOUCH_H |
| richardparker | 0:839ecbf5cb2a | 4 | #define MBED_EATOUCH_H |
| richardparker | 0:839ecbf5cb2a | 5 | |
| richardparker | 0:839ecbf5cb2a | 6 | #include "mbed.h" |
| richardparker | 0:839ecbf5cb2a | 7 | |
| richardparker | 0:839ecbf5cb2a | 8 | class EALCD; |
| richardparker | 0:839ecbf5cb2a | 9 | |
| richardparker | 0:839ecbf5cb2a | 10 | /** |
| richardparker | 0:839ecbf5cb2a | 11 | * Class to handle the touch screen on the LCD board. |
| richardparker | 0:839ecbf5cb2a | 12 | * @author Richard Parker |
| richardparker | 0:839ecbf5cb2a | 13 | */ |
| richardparker | 0:839ecbf5cb2a | 14 | class EATouch |
| richardparker | 0:839ecbf5cb2a | 15 | { |
| richardparker | 0:839ecbf5cb2a | 16 | public: |
| richardparker | 0:839ecbf5cb2a | 17 | struct matrix { |
| richardparker | 0:839ecbf5cb2a | 18 | short xOffset; |
| richardparker | 0:839ecbf5cb2a | 19 | float xScale; |
| richardparker | 0:839ecbf5cb2a | 20 | short yOffset; |
| richardparker | 0:839ecbf5cb2a | 21 | float yScale; |
| richardparker | 0:839ecbf5cb2a | 22 | }; |
| richardparker | 0:839ecbf5cb2a | 23 | |
| richardparker | 0:839ecbf5cb2a | 24 | EATouch(EALCD& lcd); |
| richardparker | 0:839ecbf5cb2a | 25 | |
| richardparker | 0:839ecbf5cb2a | 26 | ~EATouch(); |
| richardparker | 0:839ecbf5cb2a | 27 | |
| richardparker | 0:839ecbf5cb2a | 28 | /** |
| richardparker | 0:839ecbf5cb2a | 29 | * Start the calibration routine. |
| richardparker | 0:839ecbf5cb2a | 30 | * Calibration is a 3 point process to set up internal conversion measurements. |
| richardparker | 0:839ecbf5cb2a | 31 | * @return bool The status as to whether calibration was successful or whether timed |
| richardparker | 0:839ecbf5cb2a | 32 | * out etc. |
| richardparker | 0:839ecbf5cb2a | 33 | */ |
| richardparker | 0:839ecbf5cb2a | 34 | bool calibrate(); |
| richardparker | 0:839ecbf5cb2a | 35 | |
| richardparker | 0:839ecbf5cb2a | 36 | /** |
| richardparker | 0:839ecbf5cb2a | 37 | * Set the threshold value to register a press after. |
| richardparker | 0:839ecbf5cb2a | 38 | * @param threshold The value over which the value read is considered a press. |
| richardparker | 0:839ecbf5cb2a | 39 | */ |
| richardparker | 0:839ecbf5cb2a | 40 | inline void setThreshold(unsigned short threshold) { _threshold = threshold; } |
| richardparker | 0:839ecbf5cb2a | 41 | |
| richardparker | 0:839ecbf5cb2a | 42 | |
| richardparker | 0:839ecbf5cb2a | 43 | inline unsigned short threshold() { return _threshold; } |
| richardparker | 0:839ecbf5cb2a | 44 | |
| richardparker | 0:839ecbf5cb2a | 45 | /** |
| richardparker | 0:839ecbf5cb2a | 46 | * Check for a press. |
| richardparker | 0:839ecbf5cb2a | 47 | * @param x The x value of the touch in pixels (converted using calibration settings). |
| richardparker | 0:839ecbf5cb2a | 48 | * @param y The y value of the touch in pixels (converted using calibration settings). |
| richardparker | 0:839ecbf5cb2a | 49 | * @param pressed Boolean describing if a touch is detected. If pressed is false then x |
| richardparker | 0:839ecbf5cb2a | 50 | * and y are undefined. |
| richardparker | 0:839ecbf5cb2a | 51 | */ |
| richardparker | 1:f04bcaea1d60 | 52 | void touch(short& x, short& y, bool& pressed); |
| richardparker | 2:2b860e764545 | 53 | |
| richardparker | 2:2b860e764545 | 54 | bool save(); |
| richardparker | 2:2b860e764545 | 55 | |
| richardparker | 2:2b860e764545 | 56 | bool load(); |
| richardparker | 0:839ecbf5cb2a | 57 | |
| richardparker | 0:839ecbf5cb2a | 58 | private: |
| richardparker | 0:839ecbf5cb2a | 59 | EALCD& _lcd; |
| richardparker | 0:839ecbf5cb2a | 60 | |
| richardparker | 0:839ecbf5cb2a | 61 | EATouch::matrix _cal_matrix; |
| richardparker | 0:839ecbf5cb2a | 62 | |
| richardparker | 2:2b860e764545 | 63 | void _raw(short& x, short& y, bool& pressed); |
| richardparker | 2:2b860e764545 | 64 | |
| richardparker | 0:839ecbf5cb2a | 65 | /** |
| richardparker | 0:839ecbf5cb2a | 66 | * Value to hold the threshold which is used to decided if pressed or not. |
| richardparker | 0:839ecbf5cb2a | 67 | */ |
| richardparker | 0:839ecbf5cb2a | 68 | unsigned int _threshold; |
| richardparker | 2:2b860e764545 | 69 | |
| richardparker | 0:839ecbf5cb2a | 70 | /** |
| richardparker | 0:839ecbf5cb2a | 71 | * Take in x and y values from touch panel and convert to pixel position. |
| richardparker | 0:839ecbf5cb2a | 72 | * Uses the calibration values taht are set using the calibrate() function. |
| richardparker | 0:839ecbf5cb2a | 73 | * @param iX Input x value. |
| richardparker | 0:839ecbf5cb2a | 74 | * @param iY Input y value. |
| richardparker | 0:839ecbf5cb2a | 75 | * @param oX Output x value. |
| richardparker | 0:839ecbf5cb2a | 76 | * @param oY Output y value. |
| richardparker | 0:839ecbf5cb2a | 77 | */ |
| richardparker | 1:f04bcaea1d60 | 78 | void _convert( short iX, |
| richardparker | 1:f04bcaea1d60 | 79 | short iY, |
| richardparker | 1:f04bcaea1d60 | 80 | short& oX, |
| richardparker | 1:f04bcaea1d60 | 81 | short& oY); |
| richardparker | 0:839ecbf5cb2a | 82 | |
| richardparker | 1:f04bcaea1d60 | 83 | bool _captureCalibrationPoint( short iX, |
| richardparker | 1:f04bcaea1d60 | 84 | short iY, |
| richardparker | 1:f04bcaea1d60 | 85 | short& oX, |
| richardparker | 1:f04bcaea1d60 | 86 | short& oY); |
| richardparker | 0:839ecbf5cb2a | 87 | |
| richardparker | 0:839ecbf5cb2a | 88 | }; |
| richardparker | 0:839ecbf5cb2a | 89 | |
| richardparker | 0:839ecbf5cb2a | 90 | #endif |