Diff: touch_tft.cpp

Revision:

4:4542d1ff81e4

Parent:

3:1e05b273008a

Child:

5:366bdc7a8315

--- a/touch_tft.cpp	Fri Oct 18 18:29:09 2013 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,195 +0,0 @@
-/* mbed library for resistive touch pads
- * uses 4 pins - 2 IO and 2 Analog
-
- * c 2011 Peter Drescher - DC2PD
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-
-#include "touch_tft.h"
-#include "mbed.h"
-
-#define threshold 0x2000  // threshold to detect pressed 
-
-touch_tft::touch_tft(PinName xp, PinName xm, PinName yp, PinName ym,
-                     PinName mosi, PinName miso, PinName sclk, PinName cs, PinName reset,PinName dc,const char* name):
-        _xp(xp),_xm(xm),_yp(yp),_ym(ym),_ax(xp),_ay(yp),
-        SPI_TFT_ILI9341(mosi,miso,sclk,cs,reset,dc,name) {
-    xa = xp;
-    ya = yp;
-
-}
-
-point touch_tft::get_touch() {
-    unsigned short x1 = 0,x2 = 0, y1 = 0, y2 = 0;
-    unsigned int s1 = 0,s2 = 0,d1 , d2;
-    point p;
-
-    do {
-        // read y voltage
-        _xp.output();
-        _xm.output();
-        switch (orientation) {
-            case(0):
-            case(3):
-                _xp = 1;
-                _xm = 0;
-                break;
-            case(1):
-            case(2):
-                _xp = 0;
-                _xm = 1;
-                break;
-        }
-        _ym.input();        // y- have to be passive
-        AnalogIn Ay(ya);    // we have to call the constructor to switch to analog mode
-        wait_us(10);
-        y1 = Ay.read_u16(); // get y voltage
-        d1 = (y1 > y2)? (y1-y2) : (y2-y1);
-        if (((y1 < 8000) && (d1 < 2000)) || ((y1 > 8000) && (d1 < 150))) s1 ++;
-        else {
-            if (s1 > 0) s1 --;
-        }
-        y2 = y1;
-        // debug
-        /**/locate(1,7);
-        /**/this->printf("d: %4d y: %5d s1: %4d",d1,y1,s1);
-
-        // read x voltage
-        _yp.output();
-        _ym.output();
-        switch (orientation) {
-            case(0):
-            case(1):
-                _yp = 1;
-                _ym = 0;
-                break;
-            case(2):
-            case(3):
-                _yp = 0;
-                _ym = 1;
-                break;
-        }
-        _xm.input();        // x- have to be passive
-        AnalogIn Ax(xa);    // we have to call the constructor to switch to analog mode
-        wait_us(10);
-        x1 = Ax.read_u16(); // get x voltage
-        d2 = (x1 > x2)? (x1-x2) : (x2-x1);
-        if (((x1 < 8000) && (d2 < 2000)) || ((x1 > 8000) && (d2 < 150))) s2 ++;
-        else {
-            if (s2 > 0) s2 --;
-        }
-        x2 = x1;
-        // debug
-        /**/locate(1,8);
-        /**/this->printf("d: %4d x: %5d s2: %4d",d2,x1,s2);
-
-    } while (s1 < 3 || s2 < 3); // read until we have three samples close together
-    switch (orientation) {
-        case(0):
-        case(2):
-            p.y = (x1+x2) / 2;  // average of two sample
-            p.x = (y1+y2) / 2;
-            break;
-        case(1):
-        case(3):
-            p.x = (x1+x2) / 2;  // average of two sample
-            p.y = (y1+y2) / 2;
-            break;
-    }
-    return(p);
-}
-
-void touch_tft::calibrate(void) {
-    int i;
-    int a = 0,b = 0,c = 0, d = 0;
-    int pos_x, pos_y;
-    point p;
-
-    cls();
-    foreground(White);    // set chars to white
-    line(0,3,6,3,White);
-    line(3,0,3,6,White);
-
-    // get the center of the screen
-    pos_x = columns() / 2 - 3;
-    pos_x = pos_x * font[1];
-    pos_y = (rows() / 2) - 1;
-    pos_y = pos_y * font[2];
-
-    locate(pos_x,pos_y);
-    this->printf("press cross");
-    locate(pos_x,pos_y + font[2]);
-    this->printf("to calibrate");
-    for (i=0; i<5; i++) {
-        do {
-            p = get_touch();
-        } while (p.x < 0x2000 | p.y < 0x2000);  // wait for touch
-        a += p.x;
-        b += p.y;
-    }
-    a = a / 5;
-    b = b / 5;
-    locate(pos_x,pos_y);
-    this->printf("OK         ");
-    do {
-        p = get_touch();
-    } while (p.y > 0x2000 | p.x > 0x2000); // wait for no touch
-
-    cls();
-    line(width() -5, height() - 8,width() - 5,height() -1,White);   // paint cross
-    line(width() - 8,height() - 5,width() - 1,height() - 5,White);
-    locate(pos_x,pos_y);
-    this->printf("press cross");
-    locate(pos_x,pos_y + font[2]);
-    this->printf("to calibrate");
-    for (i=0; i<5; i++) {
-        do {
-            p  = get_touch();
-        } while (p.y < 0x2000 | p.x < 0x2000);  // wait for touch
-        c+= p.x;
-        d+= p.y;
-    }
-    c = c / 5;
-    d = d / 5;
-
-    locate(pos_x, pos_y);
-    this->printf("OK         ");
-    do {
-        p = get_touch();
-    } while (p.y > 0x2000 | p.x > 0x2000); // wait for no touch
-
-    cls();
-
-    x_off = a;
-    y_off = b;
-
-    i = c-a;  // delta x
-    pp_tx = i / (width() - 6);
-
-    i = d-b;  // delta y
-    pp_ty = i / (height() - 6);
-}
-
-
-point touch_tft::to_pixel(point a_point) {
-    point p;
-
-    p.x = (a_point.x - x_off) / pp_tx;
-    if (p.x > width()) p.x = width();
-    p.y = (a_point.y - y_off) / pp_ty;
-    if (p.y > height()) p.y = height();
-    return (p);
-}
-
-bool touch_tft::is_touched(point a) {
-    if (a.x > threshold & a.y > threshold) return(true);
-    else return(false);
-}