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Fork of SeeedStudioTFTv2 by
SeeedStudioTFTv2.cpp
- Committer:
- mazgch
- Date:
- 2013-10-19
- Revision:
- 5:366bdc7a8315
- Parent:
- 4:4542d1ff81e4
- Child:
- 6:2612205220c5
File content as of revision 5:366bdc7a8315:
/* 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 "mbed.h" #include "SeeedStudioTFTv2.h" SeeedStudioTFTv2::SeeedStudioTFTv2(PinName xp, PinName xm, PinName yp, PinName ym, PinName mosi, PinName miso, PinName sclk, PinName csTft, PinName rstTft, PinName dcTft, PinName blTft, PinName csSd): SPI_TFT_ILI9341(mosi,miso,sclk,csTft,rstTft,dcTft, "tft"), #ifdef USE_SDCARD SDFileSystem(mosi,miso,sclk,csSd, "sdc"), #endif bl(blTft) { #ifndef USE_SDCARD // sd card DigitalOut cs(csSd); cs = 1; #endif // backlight bl = 1; // touch screen pins _xp = xp; _yp = yp; _xm = xm; _ym = ym; // default touch calibration // orientation // 0 1 2 3 x_off = 108000; // 17252 16605 108755 108000 y_off = 22000; // 22330 105819 97167 22000 pp_tx = -291; // 378 289 -390 -291 pp_ty = 356; // 261 -355 -239 356 } void SeeedStudioTFTv2::setBacklight(bool enabled) { bl = enabled; } int SeeedStudioTFTv2::readTouch(PinName p, PinName m, PinName a, PinName i) { DigitalOut _p(p); _p = 1; DigitalOut _m(m); _m = 0; AnalogIn _a(a); DigitalIn _i(i); wait_us(10); return _a.read_u16(); } SeeedStudioTFTv2::TOUCH SeeedStudioTFTv2::getTouch(point& p) { int y2 = readTouch(_xp,_xm,_yp,_ym); int x2 = readTouch(_yp,_ym,_xp,_xm); int y1 = readTouch(_xp,_xm,_yp,_ym); int x1 = readTouch(_yp,_ym,_xp,_xm); int xd = x1 - x2; int yd = y1 - y2; xd = (xd > 0) ? xd : -xd; yd = (yd > 0) ? xd : -xd; p.x = x1 + x2; p.y = y1 + y2; #if 0 DigitalOut _p(_xp); _p = 1; DigitalOut _m(_ym); _m = 0; AnalogIn _ax(_xm); AnalogIn _ay(_yp); wait_us(20); int ax = _ax.read_u16(); int ay = _ay.read_u16(); float z = 0; z = (float)ay / ax / x / 2 * 0x10000; #endif const int th = 8000; const int df = 100; TOUCH touch; if (x1 < th || x2 < th || y1 < th || y2 < th) { p.x = 0; p.y = 0; touch = NO; } else if (xd > df || yd > df) { touch = MAYBE; } else { touch = YES; } //locate(0,50); //printf("x: %6i y: %6i",p.x,p.y); return touch; } void SeeedStudioTFTv2::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); printf("press cross "); locate(pos_x,pos_y + font[2]); printf("to calibrate "); for (i=0; i<5; i++) { while (getTouch(p) != YES) /*nothing*/; a += p.x; b += p.y; } a = a / 5; b = b / 5; locate(pos_x,pos_y); printf("ok "); locate(pos_x,pos_y + font[2]); printf("release touch "); while (getTouch(p) != NO) /*nothing*/; 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); printf("press cross "); locate(pos_x,pos_y + font[2]); printf("to calibrate "); for (i=0; i<5; i++) { while (getTouch(p) != YES) /*nothing*/; c+= p.x; d+= p.y; } c = c / 5; d = d / 5; locate(pos_x, pos_y); 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); locate(pos_x,pos_y); printf("Calibrated "); locate(pos_x,pos_y + font[2]); printf("x %6i %4i", x_off, pp_tx); locate(pos_x,pos_y + 2*font[2]); printf("y %6i %4i", y_off, pp_ty); while (getTouch(p) != NO) /*nothing*/; cls(); } point SeeedStudioTFTv2::toPixel(point p) { p.x -= x_off; p.x /= pp_tx; int w = width(); if (p.x > w) p.x = w; if (p.x < 0) p.x = 0; p.y -= y_off; p.y /= pp_ty; int h = height(); if (p.y > h) p.y = h; if (p.y < 0) p.y = 0; return (p); } bool SeeedStudioTFTv2::getPixel(point& p) { TOUCH touch = getTouch(p); p = toPixel(p); return touch == YES; }