Components / SeeedStudioTFTv2

Library for SeeedStudioTFTv2 2.8 Zoll 240x360 pixel touch SD card

Dependencies:   SPI_TFT_ILI9341

Dependents:   Seeed_TFT_Touch_Shield Seeed_TFT_Touch_Shield Adafruit_TFT_Touch_Shield UIT2_SpectrumAnalyzer ... more

Fork of SeeedStudioTFTv2 by Michael Ammann

SeeedStudioTFTv2.cpp@5:366bdc7a8315, 2013-10-19 (annotated)

Committer:
mazgch
Date:
Sat Oct 19 21:07:54 2013 +0000
Revision:
5:366bdc7a8315
Parent:
4:4542d1ff81e4
Child:
6:2612205220c5
added backlight support

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mazgch 4:4542d1ff81e4 1 /* mbed library for resistive touch pads
mazgch 4:4542d1ff81e4 2 * uses 4 pins - 2 IO and 2 Analog
mazgch 4:4542d1ff81e4 3
mazgch 4:4542d1ff81e4 4 * c 2011 Peter Drescher - DC2PD
mazgch 4:4542d1ff81e4 5 *
mazgch 4:4542d1ff81e4 6 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
mazgch 4:4542d1ff81e4 7 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
mazgch 4:4542d1ff81e4 8 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
mazgch 4:4542d1ff81e4 9 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
mazgch 4:4542d1ff81e4 10 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
mazgch 4:4542d1ff81e4 11 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
mazgch 4:4542d1ff81e4 12 * THE SOFTWARE.
mazgch 4:4542d1ff81e4 13 */
mazgch 4:4542d1ff81e4 14
mazgch 4:4542d1ff81e4 15
mazgch 4:4542d1ff81e4 16 #include "mbed.h"
mazgch 4:4542d1ff81e4 17 #include "SeeedStudioTFTv2.h"
mazgch 4:4542d1ff81e4 18
mazgch 4:4542d1ff81e4 19 SeeedStudioTFTv2::SeeedStudioTFTv2(PinName xp, PinName xm, PinName yp, PinName ym,
mazgch 4:4542d1ff81e4 20 PinName mosi, PinName miso, PinName sclk,
mazgch 4:4542d1ff81e4 21 PinName csTft, PinName rstTft, PinName dcTft, PinName blTft,
mazgch 4:4542d1ff81e4 22 PinName csSd):
mazgch 5:366bdc7a8315 23 SPI_TFT_ILI9341(mosi,miso,sclk,csTft,rstTft,dcTft, "tft"),
mazgch 4:4542d1ff81e4 24 #ifdef USE_SDCARD
mazgch 5:366bdc7a8315 25 SDFileSystem(mosi,miso,sclk,csSd, "sdc"),
mazgch 4:4542d1ff81e4 26 #endif
mazgch 5:366bdc7a8315 27 bl(blTft)
mazgch 4:4542d1ff81e4 28 {
mazgch 4:4542d1ff81e4 29 #ifndef USE_SDCARD
mazgch 4:4542d1ff81e4 30 // sd card
mazgch 4:4542d1ff81e4 31 DigitalOut cs(csSd);
mazgch 4:4542d1ff81e4 32 cs = 1;
mazgch 4:4542d1ff81e4 33 #endif
mazgch 4:4542d1ff81e4 34 // backlight
mazgch 4:4542d1ff81e4 35 bl = 1;
mazgch 4:4542d1ff81e4 36 // touch screen pins
mazgch 4:4542d1ff81e4 37 _xp = xp;
mazgch 4:4542d1ff81e4 38 _yp = yp;
mazgch 4:4542d1ff81e4 39 _xm = xm;
mazgch 4:4542d1ff81e4 40 _ym = ym;
mazgch 4:4542d1ff81e4 41 // default touch calibration
mazgch 4:4542d1ff81e4 42 // orientation // 0 1 2 3
mazgch 4:4542d1ff81e4 43 x_off = 108000; // 17252 16605 108755 108000
mazgch 4:4542d1ff81e4 44 y_off = 22000; // 22330 105819 97167 22000
mazgch 4:4542d1ff81e4 45 pp_tx = -291; // 378 289 -390 -291
mazgch 4:4542d1ff81e4 46 pp_ty = 356; // 261 -355 -239 356
mazgch 4:4542d1ff81e4 47 }
mazgch 4:4542d1ff81e4 48
mazgch 5:366bdc7a8315 49 void SeeedStudioTFTv2::setBacklight(bool enabled)
mazgch 5:366bdc7a8315 50 {
mazgch 5:366bdc7a8315 51 bl = enabled;
mazgch 5:366bdc7a8315 52 }
mazgch 5:366bdc7a8315 53
mazgch 4:4542d1ff81e4 54 int SeeedStudioTFTv2::readTouch(PinName p, PinName m, PinName a, PinName i)
mazgch 4:4542d1ff81e4 55 {
mazgch 4:4542d1ff81e4 56 DigitalOut _p(p);
mazgch 4:4542d1ff81e4 57 _p = 1;
mazgch 4:4542d1ff81e4 58 DigitalOut _m(m);
mazgch 4:4542d1ff81e4 59 _m = 0;
mazgch 4:4542d1ff81e4 60 AnalogIn _a(a);
mazgch 4:4542d1ff81e4 61 DigitalIn _i(i);
mazgch 4:4542d1ff81e4 62 wait_us(10);
mazgch 4:4542d1ff81e4 63 return _a.read_u16();
mazgch 4:4542d1ff81e4 64 }
mazgch 4:4542d1ff81e4 65
mazgch 4:4542d1ff81e4 66 SeeedStudioTFTv2::TOUCH SeeedStudioTFTv2::getTouch(point& p)
mazgch 4:4542d1ff81e4 67 {
mazgch 4:4542d1ff81e4 68 int y2 = readTouch(_xp,_xm,_yp,_ym);
mazgch 4:4542d1ff81e4 69 int x2 = readTouch(_yp,_ym,_xp,_xm);
mazgch 4:4542d1ff81e4 70 int y1 = readTouch(_xp,_xm,_yp,_ym);
mazgch 4:4542d1ff81e4 71 int x1 = readTouch(_yp,_ym,_xp,_xm);
mazgch 4:4542d1ff81e4 72 int xd = x1 - x2;
mazgch 4:4542d1ff81e4 73 int yd = y1 - y2;
mazgch 4:4542d1ff81e4 74 xd = (xd > 0) ? xd : -xd;
mazgch 4:4542d1ff81e4 75 yd = (yd > 0) ? xd : -xd;
mazgch 4:4542d1ff81e4 76 p.x = x1 + x2;
mazgch 4:4542d1ff81e4 77 p.y = y1 + y2;
mazgch 4:4542d1ff81e4 78 #if 0
mazgch 4:4542d1ff81e4 79 DigitalOut _p(_xp);
mazgch 4:4542d1ff81e4 80 _p = 1;
mazgch 4:4542d1ff81e4 81 DigitalOut _m(_ym);
mazgch 4:4542d1ff81e4 82 _m = 0;
mazgch 4:4542d1ff81e4 83 AnalogIn _ax(_xm);
mazgch 4:4542d1ff81e4 84 AnalogIn _ay(_yp);
mazgch 4:4542d1ff81e4 85 wait_us(20);
mazgch 4:4542d1ff81e4 86 int ax = _ax.read_u16();
mazgch 4:4542d1ff81e4 87 int ay = _ay.read_u16();
mazgch 4:4542d1ff81e4 88 float z = 0;
mazgch 4:4542d1ff81e4 89 z = (float)ay / ax / x / 2 * 0x10000;
mazgch 4:4542d1ff81e4 90 #endif
mazgch 4:4542d1ff81e4 91 const int th = 8000;
mazgch 4:4542d1ff81e4 92 const int df = 100;
mazgch 4:4542d1ff81e4 93 TOUCH touch;
mazgch 4:4542d1ff81e4 94 if (x1 < th || x2 < th ||
mazgch 4:4542d1ff81e4 95 y1 < th || y2 < th) {
mazgch 4:4542d1ff81e4 96 p.x = 0;
mazgch 4:4542d1ff81e4 97 p.y = 0;
mazgch 4:4542d1ff81e4 98 touch = NO;
mazgch 4:4542d1ff81e4 99 } else if (xd > df || yd > df) {
mazgch 4:4542d1ff81e4 100 touch = MAYBE;
mazgch 4:4542d1ff81e4 101 } else {
mazgch 4:4542d1ff81e4 102 touch = YES;
mazgch 4:4542d1ff81e4 103 }
mazgch 4:4542d1ff81e4 104 //locate(0,50);
mazgch 4:4542d1ff81e4 105 //printf("x: %6i y: %6i",p.x,p.y);
mazgch 4:4542d1ff81e4 106 return touch;
mazgch 4:4542d1ff81e4 107 }
mazgch 4:4542d1ff81e4 108
mazgch 4:4542d1ff81e4 109 void SeeedStudioTFTv2::calibrate(void)
mazgch 4:4542d1ff81e4 110 {
mazgch 4:4542d1ff81e4 111 int i;
mazgch 4:4542d1ff81e4 112 int a = 0,b = 0,c = 0, d = 0;
mazgch 4:4542d1ff81e4 113 int pos_x, pos_y;
mazgch 4:4542d1ff81e4 114 point p;
mazgch 4:4542d1ff81e4 115
mazgch 4:4542d1ff81e4 116 cls();
mazgch 4:4542d1ff81e4 117 foreground(White); // set chars to white
mazgch 4:4542d1ff81e4 118 line(0,3,6,3,White);
mazgch 4:4542d1ff81e4 119 line(3,0,3,6,White);
mazgch 4:4542d1ff81e4 120 // get the center of the screen
mazgch 4:4542d1ff81e4 121 pos_x = columns() / 2 - 3;
mazgch 4:4542d1ff81e4 122 pos_x = pos_x * font[1];
mazgch 4:4542d1ff81e4 123 pos_y = (rows() / 2) - 1;
mazgch 4:4542d1ff81e4 124 pos_y = pos_y * font[2];
mazgch 4:4542d1ff81e4 125 locate(pos_x,pos_y);
mazgch 4:4542d1ff81e4 126 printf("press cross ");
mazgch 4:4542d1ff81e4 127 locate(pos_x,pos_y + font[2]);
mazgch 4:4542d1ff81e4 128 printf("to calibrate ");
mazgch 4:4542d1ff81e4 129 for (i=0; i<5; i++) {
mazgch 4:4542d1ff81e4 130 while (getTouch(p) != YES)
mazgch 4:4542d1ff81e4 131 /*nothing*/;
mazgch 4:4542d1ff81e4 132 a += p.x;
mazgch 4:4542d1ff81e4 133 b += p.y;
mazgch 4:4542d1ff81e4 134 }
mazgch 4:4542d1ff81e4 135 a = a / 5;
mazgch 4:4542d1ff81e4 136 b = b / 5;
mazgch 4:4542d1ff81e4 137 locate(pos_x,pos_y);
mazgch 4:4542d1ff81e4 138 printf("ok ");
mazgch 4:4542d1ff81e4 139 locate(pos_x,pos_y + font[2]);
mazgch 4:4542d1ff81e4 140 printf("release touch ");
mazgch 4:4542d1ff81e4 141 while (getTouch(p) != NO)
mazgch 4:4542d1ff81e4 142 /*nothing*/;
mazgch 4:4542d1ff81e4 143 cls();
mazgch 4:4542d1ff81e4 144 line(width() -5, height() - 8,width() - 5,height() -1,White); // paint cross
mazgch 4:4542d1ff81e4 145 line(width() - 8,height() - 5,width() - 1,height() - 5,White);
mazgch 4:4542d1ff81e4 146 locate(pos_x,pos_y);
mazgch 4:4542d1ff81e4 147 printf("press cross ");
mazgch 4:4542d1ff81e4 148 locate(pos_x,pos_y + font[2]);
mazgch 4:4542d1ff81e4 149 printf("to calibrate ");
mazgch 4:4542d1ff81e4 150 for (i=0; i<5; i++) {
mazgch 4:4542d1ff81e4 151 while (getTouch(p) != YES)
mazgch 4:4542d1ff81e4 152 /*nothing*/;
mazgch 4:4542d1ff81e4 153 c+= p.x;
mazgch 4:4542d1ff81e4 154 d+= p.y;
mazgch 4:4542d1ff81e4 155 }
mazgch 4:4542d1ff81e4 156 c = c / 5;
mazgch 4:4542d1ff81e4 157 d = d / 5;
mazgch 4:4542d1ff81e4 158 locate(pos_x, pos_y);
mazgch 4:4542d1ff81e4 159
mazgch 4:4542d1ff81e4 160 x_off = a;
mazgch 4:4542d1ff81e4 161 y_off = b;
mazgch 4:4542d1ff81e4 162 i = c-a; // delta x
mazgch 4:4542d1ff81e4 163 pp_tx = i / (width() - 6);
mazgch 4:4542d1ff81e4 164 i = d-b; // delta y
mazgch 4:4542d1ff81e4 165 pp_ty = i / (height() - 6);
mazgch 4:4542d1ff81e4 166
mazgch 4:4542d1ff81e4 167 locate(pos_x,pos_y);
mazgch 4:4542d1ff81e4 168 printf("Calibrated ");
mazgch 4:4542d1ff81e4 169 locate(pos_x,pos_y + font[2]);
mazgch 4:4542d1ff81e4 170 printf("x %6i %4i", x_off, pp_tx);
mazgch 4:4542d1ff81e4 171 locate(pos_x,pos_y + 2*font[2]);
mazgch 4:4542d1ff81e4 172 printf("y %6i %4i", y_off, pp_ty);
mazgch 4:4542d1ff81e4 173 while (getTouch(p) != NO)
mazgch 4:4542d1ff81e4 174 /*nothing*/;
mazgch 4:4542d1ff81e4 175 cls();
mazgch 4:4542d1ff81e4 176 }
mazgch 4:4542d1ff81e4 177
mazgch 4:4542d1ff81e4 178 point SeeedStudioTFTv2::toPixel(point p)
mazgch 4:4542d1ff81e4 179 {
mazgch 4:4542d1ff81e4 180 p.x -= x_off;
mazgch 4:4542d1ff81e4 181 p.x /= pp_tx;
mazgch 4:4542d1ff81e4 182 int w = width();
mazgch 4:4542d1ff81e4 183 if (p.x > w) p.x = w;
mazgch 4:4542d1ff81e4 184 if (p.x < 0) p.x = 0;
mazgch 4:4542d1ff81e4 185 p.y -= y_off;
mazgch 4:4542d1ff81e4 186 p.y /= pp_ty;
mazgch 4:4542d1ff81e4 187 int h = height();
mazgch 4:4542d1ff81e4 188 if (p.y > h) p.y = h;
mazgch 4:4542d1ff81e4 189 if (p.y < 0) p.y = 0;
mazgch 4:4542d1ff81e4 190 return (p);
mazgch 4:4542d1ff81e4 191 }
mazgch 4:4542d1ff81e4 192
mazgch 4:4542d1ff81e4 193 bool SeeedStudioTFTv2::getPixel(point& p)
mazgch 4:4542d1ff81e4 194 {
mazgch 4:4542d1ff81e4 195 TOUCH touch = getTouch(p);
mazgch 4:4542d1ff81e4 196 p = toPixel(p);
mazgch 4:4542d1ff81e4 197 return touch == YES;
mazgch 4:4542d1ff81e4 198 }