Tick Tock / TOUCH_TFTx2_ILI9341

Fork with support for ILI9341 controller

Dependents:   CANary_9341 CANary

Fork of TOUCH_TFTx2 by Tick Tock

TOUCH_TFTx2.cpp@4:a3cd26c97b76, 2013-02-11 (annotated)

Committer:
TickTock
Date:
Mon Feb 11 02:14:15 2013 +0000
Revision:
4:a3cd26c97b76
Parent:
3:3db7309b6146
Child:
5:a9890c586a64
Added support for dual display with X&Y connected in series

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dreschpe 0:d78b00f167cb 1 /* mbed library for resistive touch pads
dreschpe 0:d78b00f167cb 2 * uses 4 pins - 2 IO and 2 Analog
dreschpe 0:d78b00f167cb 3
dreschpe 0:d78b00f167cb 4 * c 2011 Peter Drescher - DC2PD
dreschpe 0:d78b00f167cb 5 *
dreschpe 0:d78b00f167cb 6 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
dreschpe 0:d78b00f167cb 7 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
dreschpe 0:d78b00f167cb 8 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
dreschpe 0:d78b00f167cb 9 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
dreschpe 0:d78b00f167cb 10 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
dreschpe 0:d78b00f167cb 11 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
dreschpe 0:d78b00f167cb 12 * THE SOFTWARE.
dreschpe 0:d78b00f167cb 13 */
dreschpe 0:d78b00f167cb 14
dreschpe 0:d78b00f167cb 15
TickTock 3:3db7309b6146 16 #include "TOUCH_TFTx2.h"
dreschpe 0:d78b00f167cb 17 #include "mbed.h"
dreschpe 0:d78b00f167cb 18
TickTock 4:a3cd26c97b76 19 #define threshold 0x1000 // threshold to detect pressed
dreschpe 0:d78b00f167cb 20
TickTock 3:3db7309b6146 21 TOUCH_TFTx2::TOUCH_TFTx2(PinName xp, PinName xm, PinName yp, PinName ym,
TickTock 3:3db7309b6146 22 PinName mosi, PinName miso, PinName sclk, PinName cs0, PinName cs1, PinName reset,const char* name):
dreschpe 0:d78b00f167cb 23 _xp(xp),_xm(xm),_yp(yp),_ym(ym),_ax(xp),_ay(yp),
TickTock 3:3db7309b6146 24 SPI_TFTx2(mosi,miso,sclk,cs0,cs1,reset,name) {
dreschpe 0:d78b00f167cb 25 xa = xp;
dreschpe 0:d78b00f167cb 26 ya = yp;
dreschpe 0:d78b00f167cb 27
dreschpe 0:d78b00f167cb 28 }
dreschpe 0:d78b00f167cb 29
TickTock 3:3db7309b6146 30 point TOUCH_TFTx2::get_touch() {
TickTock 4:a3cd26c97b76 31 unsigned short x1, x2, y1, y2;
dreschpe 0:d78b00f167cb 32 unsigned int s1 = 0,s2 = 0,d1 , d2;
dreschpe 0:d78b00f167cb 33 point p;
dreschpe 0:d78b00f167cb 34
dreschpe 0:d78b00f167cb 35 do {
dreschpe 0:d78b00f167cb 36 // read y voltage
TickTock 4:a3cd26c97b76 37 _ym.input(); //LAJ y- has to be passive
TickTock 4:a3cd26c97b76 38 _yp.input(); //LAJ y+ has to be passive
dreschpe 0:d78b00f167cb 39 _xp.output();
dreschpe 0:d78b00f167cb 40 _xm.output();
dreschpe 0:d78b00f167cb 41 switch (orientation) {
dreschpe 0:d78b00f167cb 42 case(0):
dreschpe 0:d78b00f167cb 43 case(3):
dreschpe 0:d78b00f167cb 44 _xp = 1;
dreschpe 0:d78b00f167cb 45 _xm = 0;
dreschpe 0:d78b00f167cb 46 break;
dreschpe 0:d78b00f167cb 47 case(1):
dreschpe 0:d78b00f167cb 48 case(2):
dreschpe 0:d78b00f167cb 49 _xp = 0;
dreschpe 0:d78b00f167cb 50 _xm = 1;
dreschpe 0:d78b00f167cb 51 break;
dreschpe 0:d78b00f167cb 52 }
dreschpe 0:d78b00f167cb 53 AnalogIn Ay(ya); // we have to call the constructor to switch to analog mode
dreschpe 0:d78b00f167cb 54 wait_us(10);
dreschpe 0:d78b00f167cb 55 y1 = Ay.read_u16(); // get y voltage
dreschpe 0:d78b00f167cb 56 d1 = (y1 > y2)? (y1-y2) : (y2-y1);
TickTock 4:a3cd26c97b76 57 if (d1 < 3000) s1 ++;
dreschpe 0:d78b00f167cb 58 else {
TickTock 4:a3cd26c97b76 59 s1 = 0;
dreschpe 0:d78b00f167cb 60 }
dreschpe 0:d78b00f167cb 61 y2 = y1;
dreschpe 0:d78b00f167cb 62 // debug
TickTock 4:a3cd26c97b76 63 //locate(1,80);
dreschpe 0:d78b00f167cb 64 //printf("d: %4d y: %5d s1: %4d",d1,y1,s1);
dreschpe 0:d78b00f167cb 65
dreschpe 0:d78b00f167cb 66 // read x voltage
TickTock 4:a3cd26c97b76 67 _xm.input(); //LAJ x- has to be passive
TickTock 4:a3cd26c97b76 68 _xp.input(); //LAJ x+ has to be passive
dreschpe 0:d78b00f167cb 69 _yp.output();
dreschpe 0:d78b00f167cb 70 _ym.output();
dreschpe 0:d78b00f167cb 71 switch (orientation) {
dreschpe 0:d78b00f167cb 72 case(0):
dreschpe 0:d78b00f167cb 73 case(1):
dreschpe 0:d78b00f167cb 74 _yp = 1;
dreschpe 0:d78b00f167cb 75 _ym = 0;
dreschpe 0:d78b00f167cb 76 break;
dreschpe 0:d78b00f167cb 77 case(2):
dreschpe 0:d78b00f167cb 78 case(3):
dreschpe 0:d78b00f167cb 79 _yp = 0;
dreschpe 0:d78b00f167cb 80 _ym = 1;
dreschpe 0:d78b00f167cb 81 break;
dreschpe 0:d78b00f167cb 82 }
dreschpe 0:d78b00f167cb 83 AnalogIn Ax(xa); // we have to call the constructor to switch to analog mode
dreschpe 0:d78b00f167cb 84 wait_us(10);
dreschpe 0:d78b00f167cb 85 x1 = Ax.read_u16(); // get x voltage
dreschpe 0:d78b00f167cb 86 d2 = (x1 > x2)? (x1-x2) : (x2-x1);
TickTock 4:a3cd26c97b76 87 if (d2 < 3000) s2 ++;
dreschpe 0:d78b00f167cb 88 else {
TickTock 4:a3cd26c97b76 89 s2 = 0;
dreschpe 0:d78b00f167cb 90 }
dreschpe 0:d78b00f167cb 91 x2 = x1;
dreschpe 0:d78b00f167cb 92 // debug
TickTock 4:a3cd26c97b76 93 //locate(1,100);
dreschpe 0:d78b00f167cb 94 //printf("d: %4d x: %5d s2: %4d",d2,x1,s2);
TickTock 4:a3cd26c97b76 95 //wait(0.25);
dreschpe 0:d78b00f167cb 96 } while (s1 < 3 || s2 < 3); // read until we have three samples close together
dreschpe 0:d78b00f167cb 97 switch (orientation) {
dreschpe 0:d78b00f167cb 98 case(0):
dreschpe 0:d78b00f167cb 99 case(2):
dreschpe 0:d78b00f167cb 100 p.y = (x1+x2) / 2; // average of two sample
dreschpe 0:d78b00f167cb 101 p.x = (y1+y2) / 2;
dreschpe 0:d78b00f167cb 102 break;
dreschpe 0:d78b00f167cb 103 case(1):
dreschpe 0:d78b00f167cb 104 case(3):
dreschpe 0:d78b00f167cb 105 p.x = (x1+x2) / 2; // average of two sample
dreschpe 0:d78b00f167cb 106 p.y = (y1+y2) / 2;
dreschpe 0:d78b00f167cb 107 break;
dreschpe 0:d78b00f167cb 108 }
dreschpe 0:d78b00f167cb 109 return(p);
dreschpe 0:d78b00f167cb 110 }
dreschpe 0:d78b00f167cb 111
TickTock 3:3db7309b6146 112 void TOUCH_TFTx2::calibrate(void) {
dreschpe 0:d78b00f167cb 113 int i;
dreschpe 0:d78b00f167cb 114 int a = 0,b = 0,c = 0, d = 0;
dreschpe 2:ef7972c29c0e 115 int pos_x, pos_y;
dreschpe 0:d78b00f167cb 116 point p;
dreschpe 0:d78b00f167cb 117
TickTock 4:a3cd26c97b76 118 seldisp=1; // select right display
dreschpe 0:d78b00f167cb 119 cls();
dreschpe 0:d78b00f167cb 120 line(0,3,6,3,White);
dreschpe 0:d78b00f167cb 121 line(3,0,3,6,White);
dreschpe 2:ef7972c29c0e 122
dreschpe 2:ef7972c29c0e 123 // get the center of the screen
dreschpe 2:ef7972c29c0e 124 pos_x = columns() / 2 - 3;
dreschpe 2:ef7972c29c0e 125 pos_x = pos_x * font[1];
dreschpe 2:ef7972c29c0e 126 pos_y = (rows() / 2) - 1;
dreschpe 2:ef7972c29c0e 127 pos_y = pos_y * font[2];
dreschpe 2:ef7972c29c0e 128 locate(pos_x,pos_y);
dreschpe 0:d78b00f167cb 129 printf("press cross");
dreschpe 2:ef7972c29c0e 130 locate(pos_x,pos_y + font[2]);
dreschpe 0:d78b00f167cb 131 printf("to calibrate");
TickTock 4:a3cd26c97b76 132 do {
TickTock 4:a3cd26c97b76 133 wait(0.1);
TickTock 4:a3cd26c97b76 134 } while (!is_touched()); //Wait for touch
dreschpe 0:d78b00f167cb 135 for (i=0; i<5; i++) {
TickTock 4:a3cd26c97b76 136 p = get_touch();
dreschpe 0:d78b00f167cb 137 b += p.y;
dreschpe 0:d78b00f167cb 138 }
dreschpe 0:d78b00f167cb 139 b = b / 5;
dreschpe 2:ef7972c29c0e 140 locate(pos_x,pos_y);
dreschpe 0:d78b00f167cb 141 printf("OK ");
dreschpe 0:d78b00f167cb 142 do {
TickTock 4:a3cd26c97b76 143 wait(0.1);
TickTock 4:a3cd26c97b76 144 } while (is_touched()); //Wait for no touch
dreschpe 0:d78b00f167cb 145
dreschpe 0:d78b00f167cb 146 cls();
dreschpe 0:d78b00f167cb 147 line(width() -5, height() - 8,width() - 5,height() -1,White); // paint cross
dreschpe 0:d78b00f167cb 148 line(width() - 8,height() - 5,width() - 1,height() - 5,White);
dreschpe 2:ef7972c29c0e 149 locate(pos_x,pos_y);
dreschpe 0:d78b00f167cb 150 printf("press cross");
dreschpe 2:ef7972c29c0e 151 locate(pos_x,pos_y + font[2]);
dreschpe 0:d78b00f167cb 152 printf("to calibrate");
TickTock 4:a3cd26c97b76 153 do {
TickTock 4:a3cd26c97b76 154 wait(0.1);
TickTock 4:a3cd26c97b76 155 } while (!is_touched()); //Wait for touch
dreschpe 0:d78b00f167cb 156 for (i=0; i<5; i++) {
TickTock 4:a3cd26c97b76 157 p = get_touch();
dreschpe 0:d78b00f167cb 158 c+= p.x;
TickTock 4:a3cd26c97b76 159 }
TickTock 4:a3cd26c97b76 160 c = c / 5;
TickTock 4:a3cd26c97b76 161
TickTock 4:a3cd26c97b76 162 locate(pos_x, pos_y);
TickTock 4:a3cd26c97b76 163 printf("OK ");
TickTock 4:a3cd26c97b76 164 do {
TickTock 4:a3cd26c97b76 165 wait(0.1);
TickTock 4:a3cd26c97b76 166 } while (is_touched()); //Wait for no touch
TickTock 4:a3cd26c97b76 167
TickTock 4:a3cd26c97b76 168 cls();
TickTock 4:a3cd26c97b76 169 seldisp=0; // select left display
TickTock 4:a3cd26c97b76 170 cls();
TickTock 4:a3cd26c97b76 171 line(0,3,6,3,White);
TickTock 4:a3cd26c97b76 172 line(3,0,3,6,White);
TickTock 4:a3cd26c97b76 173
TickTock 4:a3cd26c97b76 174 // get the center of the screen
TickTock 4:a3cd26c97b76 175 pos_x = columns() / 2 - 3;
TickTock 4:a3cd26c97b76 176 pos_x = pos_x * font[1];
TickTock 4:a3cd26c97b76 177 pos_y = (rows() / 2) - 1;
TickTock 4:a3cd26c97b76 178 pos_y = pos_y * font[2];
TickTock 4:a3cd26c97b76 179 locate(pos_x,pos_y);
TickTock 4:a3cd26c97b76 180 printf("press cross");
TickTock 4:a3cd26c97b76 181 locate(pos_x,pos_y + font[2]);
TickTock 4:a3cd26c97b76 182 printf("to calibrate");
TickTock 4:a3cd26c97b76 183 do {
TickTock 4:a3cd26c97b76 184 wait(0.1);
TickTock 4:a3cd26c97b76 185 } while (!is_touched()); //Wait for touch
TickTock 4:a3cd26c97b76 186 for (i=0; i<5; i++) {
TickTock 4:a3cd26c97b76 187 p = get_touch();
TickTock 4:a3cd26c97b76 188 a += p.x;
TickTock 4:a3cd26c97b76 189 }
TickTock 4:a3cd26c97b76 190 a = a / 5;
TickTock 4:a3cd26c97b76 191 locate(pos_x,pos_y);
TickTock 4:a3cd26c97b76 192 printf("OK ");
TickTock 4:a3cd26c97b76 193 do {
TickTock 4:a3cd26c97b76 194 wait(0.1);
TickTock 4:a3cd26c97b76 195 } while (is_touched()); //Wait for no touch
TickTock 4:a3cd26c97b76 196 cls();
TickTock 4:a3cd26c97b76 197 line(width() -5, height() - 8,width() - 5,height() -1,White); // paint cross
TickTock 4:a3cd26c97b76 198 line(width() - 8,height() - 5,width() - 1,height() - 5,White);
TickTock 4:a3cd26c97b76 199 locate(pos_x,pos_y);
TickTock 4:a3cd26c97b76 200 printf("press cross");
TickTock 4:a3cd26c97b76 201 locate(pos_x,pos_y + font[2]);
TickTock 4:a3cd26c97b76 202 printf("to calibrate");
TickTock 4:a3cd26c97b76 203 do {
TickTock 4:a3cd26c97b76 204 wait(0.1);
TickTock 4:a3cd26c97b76 205 } while (!is_touched()); //Wait for touch
TickTock 4:a3cd26c97b76 206 for (i=0; i<5; i++) {
TickTock 4:a3cd26c97b76 207 p = get_touch();
dreschpe 0:d78b00f167cb 208 d+= p.y;
dreschpe 0:d78b00f167cb 209 }
dreschpe 0:d78b00f167cb 210 d = d / 5;
dreschpe 0:d78b00f167cb 211
dreschpe 2:ef7972c29c0e 212 locate(pos_x, pos_y);
dreschpe 0:d78b00f167cb 213 printf("OK ");
dreschpe 0:d78b00f167cb 214 do {
TickTock 4:a3cd26c97b76 215 wait(0.1);
TickTock 4:a3cd26c97b76 216 } while (is_touched()); //Wait for no touch
dreschpe 0:d78b00f167cb 217
dreschpe 0:d78b00f167cb 218 cls();
dreschpe 0:d78b00f167cb 219
dreschpe 0:d78b00f167cb 220 x_off = a;
dreschpe 0:d78b00f167cb 221 y_off = b;
dreschpe 0:d78b00f167cb 222
dreschpe 0:d78b00f167cb 223 i = c-a; // delta x
dreschpe 0:d78b00f167cb 224 pp_tx = i / (width() - 6);
dreschpe 0:d78b00f167cb 225
dreschpe 0:d78b00f167cb 226 i = d-b; // delta y
dreschpe 0:d78b00f167cb 227 pp_ty = i / (height() - 6);
dreschpe 0:d78b00f167cb 228 }
dreschpe 0:d78b00f167cb 229
dreschpe 0:d78b00f167cb 230
TickTock 3:3db7309b6146 231 point TOUCH_TFTx2::to_pixel(point a_point) {
dreschpe 0:d78b00f167cb 232 point p;
dreschpe 0:d78b00f167cb 233
dreschpe 0:d78b00f167cb 234 p.x = (a_point.x - x_off) / pp_tx;
dreschpe 2:ef7972c29c0e 235 if (p.x > width()) p.x = width();
dreschpe 0:d78b00f167cb 236 p.y = (a_point.y - y_off) / pp_ty;
dreschpe 2:ef7972c29c0e 237 if (p.y > height()) p.y = height();
TickTock 4:a3cd26c97b76 238 //locate(1,60); //debug
TickTock 4:a3cd26c97b76 239 //printf("x: %d\ty: %d",p.x,p.y);
dreschpe 0:d78b00f167cb 240 return (p);
dreschpe 0:d78b00f167cb 241 }
dreschpe 0:d78b00f167cb 242
TickTock 4:a3cd26c97b76 243 bool TOUCH_TFTx2::is_touched(void) {
TickTock 4:a3cd26c97b76 244 unsigned short y1;
TickTock 4:a3cd26c97b76 245 // read y voltage
TickTock 4:a3cd26c97b76 246 _ym.input(); //y- has to be passive
TickTock 4:a3cd26c97b76 247 _yp.input(); //y+ has to be passive
TickTock 4:a3cd26c97b76 248 _ym.mode(PullUp);
TickTock 4:a3cd26c97b76 249 _yp.mode(PullUp);
TickTock 4:a3cd26c97b76 250 _xp.output();
TickTock 4:a3cd26c97b76 251 _xm.output();
TickTock 4:a3cd26c97b76 252 _xp = 0; //drive x+ low
TickTock 4:a3cd26c97b76 253 _xm = 0; //drive x- low
TickTock 4:a3cd26c97b76 254 AnalogIn Ay(ya); // we have to call the constructor to switch to analog mode
TickTock 4:a3cd26c97b76 255 wait_us(10);
TickTock 4:a3cd26c97b76 256 y1 = Ay.read_u16(); // get y voltage
TickTock 4:a3cd26c97b76 257 return (y1<threshold);
dreschpe 0:d78b00f167cb 258 }