A simple program to be used to calibrate the TouchScreen library
Dependencies: TouchScreen UniGraphic mbed-rtos mbed
main.cpp@0:0df0b8e0dc55, 2016-03-19 (annotated)
- Committer:
- duncanFrance
- Date:
- Sat Mar 19 15:42:31 2016 +0000
- Revision:
- 0:0df0b8e0dc55
Initial import
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
duncanFrance | 0:0df0b8e0dc55 | 1 | #include "mbed.h" |
duncanFrance | 0:0df0b8e0dc55 | 2 | #include "rtos.h" |
duncanFrance | 0:0df0b8e0dc55 | 3 | |
duncanFrance | 0:0df0b8e0dc55 | 4 | #include "Arial12x12.h" |
duncanFrance | 0:0df0b8e0dc55 | 5 | #include "Arial24x23.h" |
duncanFrance | 0:0df0b8e0dc55 | 6 | #include "ILI932x.h" |
duncanFrance | 0:0df0b8e0dc55 | 7 | #include "TouchScreen.h" |
duncanFrance | 0:0df0b8e0dc55 | 8 | |
duncanFrance | 0:0df0b8e0dc55 | 9 | |
duncanFrance | 0:0df0b8e0dc55 | 10 | #define LCD_X_RES 240 |
duncanFrance | 0:0df0b8e0dc55 | 11 | #define LCD_Y_RES 320 |
duncanFrance | 0:0df0b8e0dc55 | 12 | |
duncanFrance | 0:0df0b8e0dc55 | 13 | #define LCD_CS PH_0 |
duncanFrance | 0:0df0b8e0dc55 | 14 | #define LCD_RESET PH_1 |
duncanFrance | 0:0df0b8e0dc55 | 15 | #define LCD_RS PA_0 |
duncanFrance | 0:0df0b8e0dc55 | 16 | #define LCD_WR PA_1 |
duncanFrance | 0:0df0b8e0dc55 | 17 | #define LCD_RD PA_4 |
duncanFrance | 0:0df0b8e0dc55 | 18 | |
duncanFrance | 0:0df0b8e0dc55 | 19 | |
duncanFrance | 0:0df0b8e0dc55 | 20 | #define T_CLK PC_10 |
duncanFrance | 0:0df0b8e0dc55 | 21 | #define T_DIN PC_12 |
duncanFrance | 0:0df0b8e0dc55 | 22 | #define T_DOUT PC_11 |
duncanFrance | 0:0df0b8e0dc55 | 23 | #define T_CS PC_8 |
duncanFrance | 0:0df0b8e0dc55 | 24 | #define T_IRQ PB_9 |
duncanFrance | 0:0df0b8e0dc55 | 25 | |
duncanFrance | 0:0df0b8e0dc55 | 26 | /** |
duncanFrance | 0:0df0b8e0dc55 | 27 | * My touch screen lies at a slight angle and hides some of the screen |
duncanFrance | 0:0df0b8e0dc55 | 28 | * Adjust this value as needed until the calibration dots are visible on your screen |
duncanFrance | 0:0df0b8e0dc55 | 29 | **/ |
duncanFrance | 0:0df0b8e0dc55 | 30 | #define CAL_OFFSET 4 |
duncanFrance | 0:0df0b8e0dc55 | 31 | |
duncanFrance | 0:0df0b8e0dc55 | 32 | /** |
duncanFrance | 0:0df0b8e0dc55 | 33 | * hand-crafted values for the touch-screen calibration |
duncanFrance | 0:0df0b8e0dc55 | 34 | **/ |
duncanFrance | 0:0df0b8e0dc55 | 35 | #define TOUCH_X_MIN 540 |
duncanFrance | 0:0df0b8e0dc55 | 36 | #define TOUCH_X_MAX 3700 |
duncanFrance | 0:0df0b8e0dc55 | 37 | #define TOUCH_Y_MIN 340 |
duncanFrance | 0:0df0b8e0dc55 | 38 | #define TOUCH_Y_MAX 3656 |
duncanFrance | 0:0df0b8e0dc55 | 39 | |
duncanFrance | 0:0df0b8e0dc55 | 40 | unsigned short backgroundcolor=Black; |
duncanFrance | 0:0df0b8e0dc55 | 41 | unsigned short foregroundcolor=White; |
duncanFrance | 0:0df0b8e0dc55 | 42 | |
duncanFrance | 0:0df0b8e0dc55 | 43 | ILI932x* mySCREEN; |
duncanFrance | 0:0df0b8e0dc55 | 44 | TouchScreen* touchScreen; |
duncanFrance | 0:0df0b8e0dc55 | 45 | Serial *pc; |
duncanFrance | 0:0df0b8e0dc55 | 46 | |
duncanFrance | 0:0df0b8e0dc55 | 47 | volatile bool done; |
duncanFrance | 0:0df0b8e0dc55 | 48 | volatile int xt, yt; |
duncanFrance | 0:0df0b8e0dc55 | 49 | volatile int xmin = 9999; |
duncanFrance | 0:0df0b8e0dc55 | 50 | volatile int xmax = 0; |
duncanFrance | 0:0df0b8e0dc55 | 51 | volatile int ymin = 9999; |
duncanFrance | 0:0df0b8e0dc55 | 52 | volatile int ymax = 0; |
duncanFrance | 0:0df0b8e0dc55 | 53 | |
duncanFrance | 0:0df0b8e0dc55 | 54 | |
duncanFrance | 0:0df0b8e0dc55 | 55 | void touchStart(TouchPosition p) { |
duncanFrance | 0:0df0b8e0dc55 | 56 | mySCREEN->fillcircle(p.screenX, p.screenY, 10, Blue) ; |
duncanFrance | 0:0df0b8e0dc55 | 57 | } |
duncanFrance | 0:0df0b8e0dc55 | 58 | |
duncanFrance | 0:0df0b8e0dc55 | 59 | void touchMove(TouchPosition p) { |
duncanFrance | 0:0df0b8e0dc55 | 60 | mySCREEN->fillcircle(p.screenX+10, p.screenY, 10, Green) ; |
duncanFrance | 0:0df0b8e0dc55 | 61 | } |
duncanFrance | 0:0df0b8e0dc55 | 62 | |
duncanFrance | 0:0df0b8e0dc55 | 63 | void touchEnd(TouchPosition p) { |
duncanFrance | 0:0df0b8e0dc55 | 64 | mySCREEN->fillcircle(p.screenX+20, p.screenY, 10, Red) ; |
duncanFrance | 0:0df0b8e0dc55 | 65 | done = true; |
duncanFrance | 0:0df0b8e0dc55 | 66 | xt = p.x; |
duncanFrance | 0:0df0b8e0dc55 | 67 | yt = p.y; |
duncanFrance | 0:0df0b8e0dc55 | 68 | } |
duncanFrance | 0:0df0b8e0dc55 | 69 | |
duncanFrance | 0:0df0b8e0dc55 | 70 | void cal(int x, int y) { |
duncanFrance | 0:0df0b8e0dc55 | 71 | done = false; |
duncanFrance | 0:0df0b8e0dc55 | 72 | mySCREEN->fillcircle(x, y, 4, Red) ; |
duncanFrance | 0:0df0b8e0dc55 | 73 | while(!done) { |
duncanFrance | 0:0df0b8e0dc55 | 74 | // wait |
duncanFrance | 0:0df0b8e0dc55 | 75 | } |
duncanFrance | 0:0df0b8e0dc55 | 76 | pc->printf("X=%d, Y=%d\r\n", xt, yt); |
duncanFrance | 0:0df0b8e0dc55 | 77 | if(xmin>xt) xmin=xt; |
duncanFrance | 0:0df0b8e0dc55 | 78 | if(xmax<xt) xmax=xt; |
duncanFrance | 0:0df0b8e0dc55 | 79 | if(ymin>yt) ymin=yt; |
duncanFrance | 0:0df0b8e0dc55 | 80 | if(ymax<yt) ymax=yt; |
duncanFrance | 0:0df0b8e0dc55 | 81 | } |
duncanFrance | 0:0df0b8e0dc55 | 82 | |
duncanFrance | 0:0df0b8e0dc55 | 83 | void print_calibration() { |
duncanFrance | 0:0df0b8e0dc55 | 84 | // We have max and min values corresponding to points inside the screen area |
duncanFrance | 0:0df0b8e0dc55 | 85 | // Work out the scaling factor on each axis, and adjust the origin to account for the |
duncanFrance | 0:0df0b8e0dc55 | 86 | // offset used during calibration |
duncanFrance | 0:0df0b8e0dc55 | 87 | float xscale, yscale; |
duncanFrance | 0:0df0b8e0dc55 | 88 | int axmin, axmax, aymin, aymax; |
duncanFrance | 0:0df0b8e0dc55 | 89 | xscale = (xmax - xmin) / (LCD_X_RES - 2*CAL_OFFSET); |
duncanFrance | 0:0df0b8e0dc55 | 90 | axmin = xmin - CAL_OFFSET * xscale; |
duncanFrance | 0:0df0b8e0dc55 | 91 | axmax = xmax + CAL_OFFSET * xscale; |
duncanFrance | 0:0df0b8e0dc55 | 92 | |
duncanFrance | 0:0df0b8e0dc55 | 93 | yscale = (ymax - ymin) / (LCD_Y_RES - 2*CAL_OFFSET); |
duncanFrance | 0:0df0b8e0dc55 | 94 | aymin = ymin - CAL_OFFSET * yscale; |
duncanFrance | 0:0df0b8e0dc55 | 95 | aymax = ymax + CAL_OFFSET * yscale; |
duncanFrance | 0:0df0b8e0dc55 | 96 | |
duncanFrance | 0:0df0b8e0dc55 | 97 | pc->printf("#define TOUCH_X_MIN %u\r\n", axmin); |
duncanFrance | 0:0df0b8e0dc55 | 98 | pc->printf("#define TOUCH_X_MAX %u\r\n", axmax); |
duncanFrance | 0:0df0b8e0dc55 | 99 | pc->printf("#define TOUCH_Y_MIN %u\r\n", aymin); |
duncanFrance | 0:0df0b8e0dc55 | 100 | pc->printf("#define TOUCH_Y_MAX %u\r\n", aymax); |
duncanFrance | 0:0df0b8e0dc55 | 101 | } |
duncanFrance | 0:0df0b8e0dc55 | 102 | |
duncanFrance | 0:0df0b8e0dc55 | 103 | int main() |
duncanFrance | 0:0df0b8e0dc55 | 104 | { |
duncanFrance | 0:0df0b8e0dc55 | 105 | pc = new Serial(USBTX, USBRX); |
duncanFrance | 0:0df0b8e0dc55 | 106 | pc->baud (9600); |
duncanFrance | 0:0df0b8e0dc55 | 107 | pc->printf("\n\nSystem Core Clock = %.3f MHZ\r\n",(float)SystemCoreClock/1000000); |
duncanFrance | 0:0df0b8e0dc55 | 108 | |
duncanFrance | 0:0df0b8e0dc55 | 109 | mySCREEN = new ILI932x(PAR_8, PortC, LCD_CS, LCD_RESET, LCD_RS, LCD_WR, LCD_RD,"myLCD"); |
duncanFrance | 0:0df0b8e0dc55 | 110 | |
duncanFrance | 0:0df0b8e0dc55 | 111 | pc->printf("Screen id %d\r\n", mySCREEN->tftID); |
duncanFrance | 0:0df0b8e0dc55 | 112 | |
duncanFrance | 0:0df0b8e0dc55 | 113 | mySCREEN->set_orientation(0); |
duncanFrance | 0:0df0b8e0dc55 | 114 | mySCREEN->cls(); // clear the screen |
duncanFrance | 0:0df0b8e0dc55 | 115 | mySCREEN->locate(0,0); |
duncanFrance | 0:0df0b8e0dc55 | 116 | mySCREEN->background(backgroundcolor); // set background to black |
duncanFrance | 0:0df0b8e0dc55 | 117 | mySCREEN->foreground(foregroundcolor); // set chars to white |
duncanFrance | 0:0df0b8e0dc55 | 118 | mySCREEN->set_font((unsigned char*) Arial24x23); |
duncanFrance | 0:0df0b8e0dc55 | 119 | |
duncanFrance | 0:0df0b8e0dc55 | 120 | touchScreen = new TouchScreen(T_DIN, T_DOUT, T_CLK, T_CS, T_IRQ); |
duncanFrance | 0:0df0b8e0dc55 | 121 | touchScreen->setTouchStartHandler(&touchStart); |
duncanFrance | 0:0df0b8e0dc55 | 122 | touchScreen->setTouchMoveHandler(&touchMove); |
duncanFrance | 0:0df0b8e0dc55 | 123 | touchScreen->setTouchEndHandler(&touchEnd); |
duncanFrance | 0:0df0b8e0dc55 | 124 | touchScreen->setLCDGeometry(LCD_X_RES, LCD_Y_RES, TOUCHSCREEN_ORIENTATION_PORTRAIT | TOUCHSCREEN_ORIENTATION_ROTATED); |
duncanFrance | 0:0df0b8e0dc55 | 125 | touchScreen->setCalibration(TOUCH_X_MIN, TOUCH_X_MAX, TOUCH_Y_MIN, TOUCH_Y_MAX); |
duncanFrance | 0:0df0b8e0dc55 | 126 | |
duncanFrance | 0:0df0b8e0dc55 | 127 | while (1) { |
duncanFrance | 0:0df0b8e0dc55 | 128 | pc->printf("Calibrate..\r\n"); |
duncanFrance | 0:0df0b8e0dc55 | 129 | cal(CAL_OFFSET, CAL_OFFSET); |
duncanFrance | 0:0df0b8e0dc55 | 130 | cal(LCD_X_RES-CAL_OFFSET, CAL_OFFSET); |
duncanFrance | 0:0df0b8e0dc55 | 131 | cal(CAL_OFFSET, LCD_Y_RES-CAL_OFFSET); |
duncanFrance | 0:0df0b8e0dc55 | 132 | cal(LCD_X_RES-CAL_OFFSET, LCD_Y_RES-CAL_OFFSET); |
duncanFrance | 0:0df0b8e0dc55 | 133 | print_calibration(); |
duncanFrance | 0:0df0b8e0dc55 | 134 | Thread::wait(1000); |
duncanFrance | 0:0df0b8e0dc55 | 135 | } |
duncanFrance | 0:0df0b8e0dc55 | 136 | } |