Henry Leinen / Touch_tft

LIB for resistiv touchscreen connected to 4 mbed pins Use SPI_TFT lib

Fork of Touch_tft by Peter Drescher

touch_tft.h@0:d78b00f167cb, 2011-07-14 (annotated)

Committer:
dreschpe
Date:
Thu Jul 14 21:02:43 2011 +0000
Revision:
0:d78b00f167cb
Child:
1:1745fdf054b5
0.5

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dreschpe 0:d78b00f167cb 1 #ifndef MBED_TOUCH_H
dreschpe 0:d78b00f167cb 2 #define MBED_TOUCH_H
dreschpe 0:d78b00f167cb 3
dreschpe 0:d78b00f167cb 4 #include "mbed.h"
dreschpe 0:d78b00f167cb 5 #include "SPI_TFT.h"
dreschpe 0:d78b00f167cb 6
dreschpe 0:d78b00f167cb 7 struct point{
dreschpe 0:d78b00f167cb 8 unsigned short x;
dreschpe 0:d78b00f167cb 9 unsigned short y;
dreschpe 0:d78b00f167cb 10 };
dreschpe 0:d78b00f167cb 11
dreschpe 0:d78b00f167cb 12 class touch_tft : public SPI_TFT{
dreschpe 0:d78b00f167cb 13 public:
dreschpe 0:d78b00f167cb 14 /** create a TFT with touch object connected to the pins
dreschpe 0:d78b00f167cb 15 *
dreschpe 0:d78b00f167cb 16 * @param pin xp resistiv touch x+
dreschpe 0:d78b00f167cb 17 * @param pin xm resistiv touch x-
dreschpe 0:d78b00f167cb 18 * @param pin yp resistiv touch y+
dreschpe 0:d78b00f167cb 19 * @param pin ym resistiv touch y-
dreschpe 0:d78b00f167cb 20 * @param mosi,miso,sclk SPI connection to TFT
dreschpe 0:d78b00f167cb 21 * @param cs pin connected to CS of display
dreschpe 0:d78b00f167cb 22 * @param reset pin connected to RESET of display
dreschpe 0:d78b00f167cb 23 * based on my SPI_TFT lib
dreschpe 0:d78b00f167cb 24 */
dreschpe 0:d78b00f167cb 25 touch_tft(PinName xp, PinName xm, PinName yp, PinName ym,PinName mosi, PinName miso, PinName sclk, PinName cs, PinName reset,const char* name ="TFT");
dreschpe 0:d78b00f167cb 26
dreschpe 0:d78b00f167cb 27 /** calibrate the touch display
dreschpe 0:d78b00f167cb 28 *
dreschpe 0:d78b00f167cb 29 */
dreschpe 0:d78b00f167cb 30 void calibrate(void);
dreschpe 0:d78b00f167cb 31
dreschpe 0:d78b00f167cb 32 /** read x and y analog samples
dreschpe 0:d78b00f167cb 33 *
dreschpe 0:d78b00f167cb 34 * @returns point(x,y)
dreschpe 0:d78b00f167cb 35 */
dreschpe 0:d78b00f167cb 36 point get_touch(void);
dreschpe 0:d78b00f167cb 37
dreschpe 0:d78b00f167cb 38 /** calculate coord on screen
dreschpe 0:d78b00f167cb 39 *
dreschpe 0:d78b00f167cb 40 * @param a_point point(analog x, analog y)
dreschpe 0:d78b00f167cb 41 * @returns point(pixel x, pixel y)
dreschpe 0:d78b00f167cb 42 *
dreschpe 0:d78b00f167cb 43 */
dreschpe 0:d78b00f167cb 44 point to_pixel(point a_point);
dreschpe 0:d78b00f167cb 45
dreschpe 0:d78b00f167cb 46 /** test if screen is touched
dreschpe 0:d78b00f167cb 47 *
dreschpe 0:d78b00f167cb 48 * @param point analog x,y
dreschpe 0:d78b00f167cb 49 * @returns true is touched
dreschpe 0:d78b00f167cb 50 *
dreschpe 0:d78b00f167cb 51 */
dreschpe 0:d78b00f167cb 52 bool is_touched(point a);
dreschpe 0:d78b00f167cb 53
dreschpe 0:d78b00f167cb 54 protected:
dreschpe 0:d78b00f167cb 55 DigitalInOut _xp;
dreschpe 0:d78b00f167cb 56 DigitalInOut _xm;
dreschpe 0:d78b00f167cb 57 DigitalInOut _yp;
dreschpe 0:d78b00f167cb 58 DigitalInOut _ym;
dreschpe 0:d78b00f167cb 59 AnalogIn _ax;
dreschpe 0:d78b00f167cb 60 AnalogIn _ay;
dreschpe 0:d78b00f167cb 61 PinName xa;
dreschpe 0:d78b00f167cb 62 PinName ya;
dreschpe 0:d78b00f167cb 63
dreschpe 0:d78b00f167cb 64
dreschpe 0:d78b00f167cb 65 unsigned short x_a,y_a;
dreschpe 0:d78b00f167cb 66 unsigned short x_off,y_off;
dreschpe 0:d78b00f167cb 67 unsigned short pp_tx,pp_ty;
dreschpe 0:d78b00f167cb 68
dreschpe 0:d78b00f167cb 69
dreschpe 0:d78b00f167cb 70
dreschpe 0:d78b00f167cb 71 };
dreschpe 0:d78b00f167cb 72
dreschpe 0:d78b00f167cb 73 #endif