Fork with support for ILI9341 controller
Dependents: CANary_9341 CANary
Fork of TOUCH_TFTx2 by
TOUCH_TFTx2.cpp@5:a9890c586a64, 2013-02-14 (annotated)
- Committer:
- TickTock
- Date:
- Thu Feb 14 00:26:54 2013 +0000
- Revision:
- 5:a9890c586a64
- Parent:
- 4:a3cd26c97b76
- Child:
- 6:a91b668b058a
Cleaned up noise and corrected calibration
Who changed what in which revision?
User | Revision | Line number | New 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 | 5:a9890c586a64 | 19 | #define threshold 0x1000 // threshold to detect pressed |
TickTock | 5:a9890c586a64 | 20 | #define accuracy 300 // noise filter |
TickTock | 5:a9890c586a64 | 21 | #define numsamp 16 // number of averaging samples |
dreschpe | 0:d78b00f167cb | 22 | |
TickTock | 3:3db7309b6146 | 23 | TOUCH_TFTx2::TOUCH_TFTx2(PinName xp, PinName xm, PinName yp, PinName ym, |
TickTock | 3:3db7309b6146 | 24 | PinName mosi, PinName miso, PinName sclk, PinName cs0, PinName cs1, PinName reset,const char* name): |
dreschpe | 0:d78b00f167cb | 25 | _xp(xp),_xm(xm),_yp(yp),_ym(ym),_ax(xp),_ay(yp), |
TickTock | 3:3db7309b6146 | 26 | SPI_TFTx2(mosi,miso,sclk,cs0,cs1,reset,name) { |
dreschpe | 0:d78b00f167cb | 27 | xa = xp; |
dreschpe | 0:d78b00f167cb | 28 | ya = yp; |
dreschpe | 0:d78b00f167cb | 29 | |
dreschpe | 0:d78b00f167cb | 30 | } |
dreschpe | 0:d78b00f167cb | 31 | |
TickTock | 3:3db7309b6146 | 32 | point TOUCH_TFTx2::get_touch() { |
TickTock | 5:a9890c586a64 | 33 | unsigned short x1, x2, y1, y2, i=0, j=0, k; |
TickTock | 5:a9890c586a64 | 34 | unsigned long dy , dx, xs1=0, ys1=0, xs2=0, ys2=0; |
dreschpe | 0:d78b00f167cb | 35 | point p; |
dreschpe | 0:d78b00f167cb | 36 | |
TickTock | 5:a9890c586a64 | 37 | for (k=0; j<numsamp; k++) { |
dreschpe | 0:d78b00f167cb | 38 | // read y voltage |
TickTock | 4:a3cd26c97b76 | 39 | _ym.input(); //LAJ y- has to be passive |
TickTock | 4:a3cd26c97b76 | 40 | _yp.input(); //LAJ y+ has to be passive |
dreschpe | 0:d78b00f167cb | 41 | _xp.output(); |
dreschpe | 0:d78b00f167cb | 42 | _xm.output(); |
dreschpe | 0:d78b00f167cb | 43 | switch (orientation) { |
dreschpe | 0:d78b00f167cb | 44 | case(0): |
dreschpe | 0:d78b00f167cb | 45 | case(3): |
dreschpe | 0:d78b00f167cb | 46 | _xp = 1; |
dreschpe | 0:d78b00f167cb | 47 | _xm = 0; |
dreschpe | 0:d78b00f167cb | 48 | break; |
dreschpe | 0:d78b00f167cb | 49 | case(1): |
dreschpe | 0:d78b00f167cb | 50 | case(2): |
dreschpe | 0:d78b00f167cb | 51 | _xp = 0; |
dreschpe | 0:d78b00f167cb | 52 | _xm = 1; |
dreschpe | 0:d78b00f167cb | 53 | break; |
dreschpe | 0:d78b00f167cb | 54 | } |
dreschpe | 0:d78b00f167cb | 55 | AnalogIn Ay(ya); // we have to call the constructor to switch to analog mode |
dreschpe | 0:d78b00f167cb | 56 | wait_us(10); |
dreschpe | 0:d78b00f167cb | 57 | y1 = Ay.read_u16(); // get y voltage |
TickTock | 5:a9890c586a64 | 58 | dy = (y1 > y2)? (y1-y2) : (y2-y1); |
dreschpe | 0:d78b00f167cb | 59 | y2 = y1; |
dreschpe | 0:d78b00f167cb | 60 | |
dreschpe | 0:d78b00f167cb | 61 | // read x voltage |
TickTock | 4:a3cd26c97b76 | 62 | _xm.input(); //LAJ x- has to be passive |
TickTock | 4:a3cd26c97b76 | 63 | _xp.input(); //LAJ x+ has to be passive |
dreschpe | 0:d78b00f167cb | 64 | _yp.output(); |
dreschpe | 0:d78b00f167cb | 65 | _ym.output(); |
dreschpe | 0:d78b00f167cb | 66 | switch (orientation) { |
dreschpe | 0:d78b00f167cb | 67 | case(0): |
dreschpe | 0:d78b00f167cb | 68 | case(1): |
dreschpe | 0:d78b00f167cb | 69 | _yp = 1; |
dreschpe | 0:d78b00f167cb | 70 | _ym = 0; |
dreschpe | 0:d78b00f167cb | 71 | break; |
dreschpe | 0:d78b00f167cb | 72 | case(2): |
dreschpe | 0:d78b00f167cb | 73 | case(3): |
dreschpe | 0:d78b00f167cb | 74 | _yp = 0; |
dreschpe | 0:d78b00f167cb | 75 | _ym = 1; |
dreschpe | 0:d78b00f167cb | 76 | break; |
dreschpe | 0:d78b00f167cb | 77 | } |
dreschpe | 0:d78b00f167cb | 78 | AnalogIn Ax(xa); // we have to call the constructor to switch to analog mode |
dreschpe | 0:d78b00f167cb | 79 | wait_us(10); |
dreschpe | 0:d78b00f167cb | 80 | x1 = Ax.read_u16(); // get x voltage |
TickTock | 5:a9890c586a64 | 81 | dx = (x1 > x2)? (x1-x2) : (x2-x1); |
dreschpe | 0:d78b00f167cb | 82 | x2 = x1; |
TickTock | 5:a9890c586a64 | 83 | if(dy<accuracy && dx<accuracy) { |
TickTock | 5:a9890c586a64 | 84 | if(k<8){ |
TickTock | 5:a9890c586a64 | 85 | xs1 += x1; |
TickTock | 5:a9890c586a64 | 86 | ys1 += y1; |
TickTock | 5:a9890c586a64 | 87 | i++; |
TickTock | 5:a9890c586a64 | 88 | } else { |
TickTock | 5:a9890c586a64 | 89 | xs2 += x1; |
TickTock | 5:a9890c586a64 | 90 | ys2 += y1; |
TickTock | 5:a9890c586a64 | 91 | j++; |
TickTock | 5:a9890c586a64 | 92 | } |
TickTock | 5:a9890c586a64 | 93 | } |
TickTock | 5:a9890c586a64 | 94 | } // for:next |
TickTock | 5:a9890c586a64 | 95 | xs1 = xs1 / i; |
TickTock | 5:a9890c586a64 | 96 | ys1 = ys1 / i; |
TickTock | 5:a9890c586a64 | 97 | xs2 = xs2 / j; |
TickTock | 5:a9890c586a64 | 98 | ys2 = ys2 / j; |
TickTock | 5:a9890c586a64 | 99 | dy = (ys1 > ys2)? (ys1-ys2) : (ys2-ys1); |
TickTock | 5:a9890c586a64 | 100 | dx = (xs1 > xs2)? (xs1-xs2) : (xs2-xs1); |
TickTock | 5:a9890c586a64 | 101 | if(dy<accuracy && dx<accuracy) { |
TickTock | 5:a9890c586a64 | 102 | |
TickTock | 5:a9890c586a64 | 103 | switch (orientation) { |
TickTock | 5:a9890c586a64 | 104 | case(0): |
TickTock | 5:a9890c586a64 | 105 | case(2): |
TickTock | 5:a9890c586a64 | 106 | p.y = (xs1+xs2) / 2; // average |
TickTock | 5:a9890c586a64 | 107 | p.x = (ys1+ys2) / 2; |
TickTock | 5:a9890c586a64 | 108 | break; |
TickTock | 5:a9890c586a64 | 109 | case(1): |
TickTock | 5:a9890c586a64 | 110 | case(3): |
TickTock | 5:a9890c586a64 | 111 | p.x = (xs1+xs2) / 2; // average |
TickTock | 5:a9890c586a64 | 112 | p.y = (ys1+ys2) / 2; |
TickTock | 5:a9890c586a64 | 113 | break; |
TickTock | 5:a9890c586a64 | 114 | } |
TickTock | 5:a9890c586a64 | 115 | } else { // sample average moved too much so discard |
TickTock | 5:a9890c586a64 | 116 | p.x = 0; |
TickTock | 5:a9890c586a64 | 117 | p.y = 0; |
dreschpe | 0:d78b00f167cb | 118 | } |
TickTock | 5:a9890c586a64 | 119 | // debug |
TickTock | 5:a9890c586a64 | 120 | //locate(1,80); |
TickTock | 5:a9890c586a64 | 121 | //printf("d: %4d y: %5d",dy,p.y); |
TickTock | 5:a9890c586a64 | 122 | //locate(1,100); |
TickTock | 5:a9890c586a64 | 123 | //printf("d: %4d x: %5d",dx,p.x); |
TickTock | 5:a9890c586a64 | 124 | //wait(0.25); |
dreschpe | 0:d78b00f167cb | 125 | return(p); |
TickTock | 5:a9890c586a64 | 126 | }//*/ |
dreschpe | 0:d78b00f167cb | 127 | |
TickTock | 3:3db7309b6146 | 128 | void TOUCH_TFTx2::calibrate(void) { |
dreschpe | 0:d78b00f167cb | 129 | int i; |
TickTock | 5:a9890c586a64 | 130 | int ulx0 = 0, uly0 = 0, brx0 = 0, bry0 = 0; |
TickTock | 5:a9890c586a64 | 131 | int ulx1 = 0, uly1 = 0, brx1 = 0, bry1 = 0; |
dreschpe | 2:ef7972c29c0e | 132 | int pos_x, pos_y; |
dreschpe | 0:d78b00f167cb | 133 | point p; |
dreschpe | 0:d78b00f167cb | 134 | |
TickTock | 4:a3cd26c97b76 | 135 | seldisp=1; // select right display |
dreschpe | 0:d78b00f167cb | 136 | cls(); |
dreschpe | 0:d78b00f167cb | 137 | line(0,3,6,3,White); |
dreschpe | 0:d78b00f167cb | 138 | line(3,0,3,6,White); |
dreschpe | 2:ef7972c29c0e | 139 | |
dreschpe | 2:ef7972c29c0e | 140 | // get the center of the screen |
dreschpe | 2:ef7972c29c0e | 141 | pos_x = columns() / 2 - 3; |
dreschpe | 2:ef7972c29c0e | 142 | pos_x = pos_x * font[1]; |
dreschpe | 2:ef7972c29c0e | 143 | pos_y = (rows() / 2) - 1; |
dreschpe | 2:ef7972c29c0e | 144 | pos_y = pos_y * font[2]; |
TickTock | 5:a9890c586a64 | 145 | |
TickTock | 5:a9890c586a64 | 146 | //calibrate right screen |
dreschpe | 2:ef7972c29c0e | 147 | locate(pos_x,pos_y); |
dreschpe | 0:d78b00f167cb | 148 | printf("press cross"); |
dreschpe | 2:ef7972c29c0e | 149 | locate(pos_x,pos_y + font[2]); |
dreschpe | 0:d78b00f167cb | 150 | printf("to calibrate"); |
TickTock | 4:a3cd26c97b76 | 151 | do { |
TickTock | 4:a3cd26c97b76 | 152 | wait(0.1); |
TickTock | 5:a9890c586a64 | 153 | } while (!is_touched()); //Wait for touch |
dreschpe | 0:d78b00f167cb | 154 | for (i=0; i<5; i++) { |
TickTock | 5:a9890c586a64 | 155 | do { |
TickTock | 5:a9890c586a64 | 156 | p = get_touch(); |
TickTock | 5:a9890c586a64 | 157 | } while (p.x==0 && p.y==0); |
TickTock | 5:a9890c586a64 | 158 | ulx1 += p.x; |
TickTock | 5:a9890c586a64 | 159 | uly1 += p.y; |
dreschpe | 0:d78b00f167cb | 160 | } |
TickTock | 5:a9890c586a64 | 161 | ulx1 /= 5; |
TickTock | 5:a9890c586a64 | 162 | uly1 /= 5; |
dreschpe | 2:ef7972c29c0e | 163 | locate(pos_x,pos_y); |
dreschpe | 0:d78b00f167cb | 164 | printf("OK "); |
TickTock | 5:a9890c586a64 | 165 | printf(" "); |
dreschpe | 0:d78b00f167cb | 166 | do { |
TickTock | 4:a3cd26c97b76 | 167 | wait(0.1); |
TickTock | 5:a9890c586a64 | 168 | } while (is_touched()); //Wait for no touch |
dreschpe | 0:d78b00f167cb | 169 | |
dreschpe | 0:d78b00f167cb | 170 | cls(); |
TickTock | 5:a9890c586a64 | 171 | line(width() -1, height() - 4,width() - 7,height() -4,White); // paint cross |
TickTock | 5:a9890c586a64 | 172 | line(width() - 4,height() - 1,width() - 4,height() - 7,White); |
dreschpe | 2:ef7972c29c0e | 173 | locate(pos_x,pos_y); |
dreschpe | 0:d78b00f167cb | 174 | printf("press cross"); |
dreschpe | 2:ef7972c29c0e | 175 | locate(pos_x,pos_y + font[2]); |
dreschpe | 0:d78b00f167cb | 176 | printf("to calibrate"); |
TickTock | 4:a3cd26c97b76 | 177 | do { |
TickTock | 4:a3cd26c97b76 | 178 | wait(0.1); |
TickTock | 5:a9890c586a64 | 179 | } while (!is_touched()); //Wait for touch |
dreschpe | 0:d78b00f167cb | 180 | for (i=0; i<5; i++) { |
TickTock | 5:a9890c586a64 | 181 | do { |
TickTock | 5:a9890c586a64 | 182 | p = get_touch(); |
TickTock | 5:a9890c586a64 | 183 | } while (p.x==0 && p.y==0); p = get_touch(); |
TickTock | 5:a9890c586a64 | 184 | brx1 += p.x; |
TickTock | 5:a9890c586a64 | 185 | bry1 += p.y; |
TickTock | 4:a3cd26c97b76 | 186 | } |
TickTock | 5:a9890c586a64 | 187 | brx1 /= 5; |
TickTock | 5:a9890c586a64 | 188 | bry1 /= 5; |
TickTock | 4:a3cd26c97b76 | 189 | |
TickTock | 4:a3cd26c97b76 | 190 | locate(pos_x, pos_y); |
TickTock | 4:a3cd26c97b76 | 191 | printf("OK "); |
TickTock | 5:a9890c586a64 | 192 | printf(" "); |
TickTock | 4:a3cd26c97b76 | 193 | do { |
TickTock | 4:a3cd26c97b76 | 194 | wait(0.1); |
TickTock | 5:a9890c586a64 | 195 | } while (is_touched()); //Wait for no touch |
TickTock | 4:a3cd26c97b76 | 196 | |
TickTock | 4:a3cd26c97b76 | 197 | cls(); |
TickTock | 4:a3cd26c97b76 | 198 | seldisp=0; // select left display |
TickTock | 4:a3cd26c97b76 | 199 | cls(); |
TickTock | 4:a3cd26c97b76 | 200 | line(0,3,6,3,White); |
TickTock | 4:a3cd26c97b76 | 201 | line(3,0,3,6,White); |
TickTock | 4:a3cd26c97b76 | 202 | |
TickTock | 5:a9890c586a64 | 203 | // now calibrate left screen |
TickTock | 4:a3cd26c97b76 | 204 | locate(pos_x,pos_y); |
TickTock | 4:a3cd26c97b76 | 205 | printf("press cross"); |
TickTock | 4:a3cd26c97b76 | 206 | locate(pos_x,pos_y + font[2]); |
TickTock | 4:a3cd26c97b76 | 207 | printf("to calibrate"); |
TickTock | 4:a3cd26c97b76 | 208 | do { |
TickTock | 4:a3cd26c97b76 | 209 | wait(0.1); |
TickTock | 5:a9890c586a64 | 210 | } while (!is_touched()); //Wait for touch |
TickTock | 4:a3cd26c97b76 | 211 | for (i=0; i<5; i++) { |
TickTock | 5:a9890c586a64 | 212 | do { |
TickTock | 5:a9890c586a64 | 213 | p = get_touch(); |
TickTock | 5:a9890c586a64 | 214 | } while (p.x==0 && p.y==0); |
TickTock | 5:a9890c586a64 | 215 | ulx0 += p.x; |
TickTock | 5:a9890c586a64 | 216 | uly0 += p.y; |
TickTock | 4:a3cd26c97b76 | 217 | } |
TickTock | 5:a9890c586a64 | 218 | ulx0 /= 5; |
TickTock | 5:a9890c586a64 | 219 | uly0 /= 5; |
TickTock | 4:a3cd26c97b76 | 220 | locate(pos_x,pos_y); |
TickTock | 4:a3cd26c97b76 | 221 | printf("OK "); |
TickTock | 5:a9890c586a64 | 222 | printf(" "); |
TickTock | 4:a3cd26c97b76 | 223 | do { |
TickTock | 4:a3cd26c97b76 | 224 | wait(0.1); |
TickTock | 5:a9890c586a64 | 225 | } while (is_touched()); //Wait for no touch |
TickTock | 5:a9890c586a64 | 226 | |
TickTock | 4:a3cd26c97b76 | 227 | cls(); |
TickTock | 5:a9890c586a64 | 228 | line(width() -1, height() - 4,width() - 7,height() -4,White); // paint cross |
TickTock | 5:a9890c586a64 | 229 | line(width() - 4,height() - 1,width() - 4,height() - 7,White); |
TickTock | 4:a3cd26c97b76 | 230 | locate(pos_x,pos_y); |
TickTock | 4:a3cd26c97b76 | 231 | printf("press cross"); |
TickTock | 4:a3cd26c97b76 | 232 | locate(pos_x,pos_y + font[2]); |
TickTock | 4:a3cd26c97b76 | 233 | printf("to calibrate"); |
TickTock | 4:a3cd26c97b76 | 234 | do { |
TickTock | 4:a3cd26c97b76 | 235 | wait(0.1); |
TickTock | 5:a9890c586a64 | 236 | } while (!is_touched()); //Wait for touch |
TickTock | 4:a3cd26c97b76 | 237 | for (i=0; i<5; i++) { |
TickTock | 5:a9890c586a64 | 238 | do { |
TickTock | 5:a9890c586a64 | 239 | p = get_touch(); |
TickTock | 5:a9890c586a64 | 240 | } while (p.x==0 && p.y==0); |
TickTock | 5:a9890c586a64 | 241 | brx0 += p.x; |
TickTock | 5:a9890c586a64 | 242 | bry0 += p.y; |
dreschpe | 0:d78b00f167cb | 243 | } |
TickTock | 5:a9890c586a64 | 244 | brx0 /= 5; |
TickTock | 5:a9890c586a64 | 245 | bry0 /= 5; |
dreschpe | 0:d78b00f167cb | 246 | |
dreschpe | 2:ef7972c29c0e | 247 | locate(pos_x, pos_y); |
dreschpe | 0:d78b00f167cb | 248 | printf("OK "); |
TickTock | 5:a9890c586a64 | 249 | printf(" "); |
dreschpe | 0:d78b00f167cb | 250 | do { |
TickTock | 4:a3cd26c97b76 | 251 | wait(0.1); |
TickTock | 5:a9890c586a64 | 252 | } while (is_touched()); //Wait for no touch |
dreschpe | 0:d78b00f167cb | 253 | |
dreschpe | 0:d78b00f167cb | 254 | cls(); |
dreschpe | 0:d78b00f167cb | 255 | |
TickTock | 5:a9890c586a64 | 256 | x0_off = ulx0; |
TickTock | 5:a9890c586a64 | 257 | y0_off = uly0; |
TickTock | 5:a9890c586a64 | 258 | x0_pp = (brx0-ulx0) / (width() - 6); |
TickTock | 5:a9890c586a64 | 259 | y0_pp = (bry0-uly0) / (height() - 6); |
TickTock | 5:a9890c586a64 | 260 | |
TickTock | 5:a9890c586a64 | 261 | |
TickTock | 5:a9890c586a64 | 262 | x1_off = ulx1; |
TickTock | 5:a9890c586a64 | 263 | y1_off = uly1; |
TickTock | 5:a9890c586a64 | 264 | x1_pp = (brx1-ulx1) / (width() - 6); |
TickTock | 5:a9890c586a64 | 265 | y1_pp = (bry1-uly1) / (height() - 6); |
TickTock | 5:a9890c586a64 | 266 | x_mid = (brx0 + ulx1) / 2; |
dreschpe | 0:d78b00f167cb | 267 | |
dreschpe | 0:d78b00f167cb | 268 | } |
dreschpe | 0:d78b00f167cb | 269 | |
dreschpe | 0:d78b00f167cb | 270 | |
TickTock | 3:3db7309b6146 | 271 | point TOUCH_TFTx2::to_pixel(point a_point) { |
dreschpe | 0:d78b00f167cb | 272 | point p; |
dreschpe | 0:d78b00f167cb | 273 | |
TickTock | 5:a9890c586a64 | 274 | if (a_point.x < x_mid) { // left screen |
TickTock | 5:a9890c586a64 | 275 | p.x = (a_point.x - x0_off) / x0_pp + 3; |
TickTock | 5:a9890c586a64 | 276 | if (p.x > width()-1) p.x = width()-1; |
TickTock | 5:a9890c586a64 | 277 | p.y = (a_point.y - y0_off) / y0_pp + 3; |
TickTock | 5:a9890c586a64 | 278 | }else{ // right screen |
TickTock | 5:a9890c586a64 | 279 | p.x = (a_point.x - x1_off) / x1_pp + 3; |
TickTock | 5:a9890c586a64 | 280 | if (p.x > width()-1) p.x = 2*width()-1; |
TickTock | 5:a9890c586a64 | 281 | else p.x += width(); // add width to indicate right screen |
TickTock | 5:a9890c586a64 | 282 | p.y = (a_point.y - y1_off) / y1_pp + 3; |
TickTock | 5:a9890c586a64 | 283 | } |
TickTock | 5:a9890c586a64 | 284 | if (p.x<0) p.x=0; |
TickTock | 5:a9890c586a64 | 285 | if (p.y<0) p.y=0; |
TickTock | 5:a9890c586a64 | 286 | if (p.y > height()-1) p.y = height()-1; |
TickTock | 4:a3cd26c97b76 | 287 | //locate(1,60); //debug |
TickTock | 4:a3cd26c97b76 | 288 | //printf("x: %d\ty: %d",p.x,p.y); |
dreschpe | 0:d78b00f167cb | 289 | return (p); |
dreschpe | 0:d78b00f167cb | 290 | } |
dreschpe | 0:d78b00f167cb | 291 | |
TickTock | 4:a3cd26c97b76 | 292 | bool TOUCH_TFTx2::is_touched(void) { |
TickTock | 4:a3cd26c97b76 | 293 | unsigned short y1; |
TickTock | 4:a3cd26c97b76 | 294 | // read y voltage |
TickTock | 4:a3cd26c97b76 | 295 | _ym.input(); //y- has to be passive |
TickTock | 4:a3cd26c97b76 | 296 | _yp.input(); //y+ has to be passive |
TickTock | 4:a3cd26c97b76 | 297 | _ym.mode(PullUp); |
TickTock | 4:a3cd26c97b76 | 298 | _yp.mode(PullUp); |
TickTock | 4:a3cd26c97b76 | 299 | _xp.output(); |
TickTock | 4:a3cd26c97b76 | 300 | _xm.output(); |
TickTock | 4:a3cd26c97b76 | 301 | _xp = 0; //drive x+ low |
TickTock | 4:a3cd26c97b76 | 302 | _xm = 0; //drive x- low |
TickTock | 4:a3cd26c97b76 | 303 | AnalogIn Ay(ya); // we have to call the constructor to switch to analog mode |
TickTock | 4:a3cd26c97b76 | 304 | wait_us(10); |
TickTock | 4:a3cd26c97b76 | 305 | y1 = Ay.read_u16(); // get y voltage |
TickTock | 4:a3cd26c97b76 | 306 | return (y1<threshold); |
dreschpe | 0:d78b00f167cb | 307 | } |