EmbeddedArtists AB / DmTftLibrary

Modified version of the DmTftLibrary, optimized for the LPC4088 Experiment Base Board

Dependents:   lpc4088_ebb_dm_calc lpc4088_ebb_dm_bubbles

Fork of DmTftLibrary by Display Module

DmTouch.cpp@8:b24f01d148c4, 2014-07-07 (annotated)

Committer:
displaymodule
Date:
Mon Jul 07 10:38:09 2014 +0000
Revision:
8:b24f01d148c4
Parent:
7:6cd8c36cbdb3
Child:
9:bac5439e3c1c
Removed dependency on the T_IRQ pin.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
displaymodule 0:d6ff5fa503e8 1 /**********************************************************************************************
displaymodule 0:d6ff5fa503e8 2 Copyright (c) 2014 DisplayModule. All rights reserved.
displaymodule 0:d6ff5fa503e8 3
displaymodule 0:d6ff5fa503e8 4 Redistribution and use of this source code, part of this source code or any compiled binary
displaymodule 0:d6ff5fa503e8 5 based on this source code is permitted as long as the above copyright notice and following
displaymodule 0:d6ff5fa503e8 6 disclaimer is retained.
displaymodule 0:d6ff5fa503e8 7
displaymodule 0:d6ff5fa503e8 8 DISCLAIMER:
displaymodule 0:d6ff5fa503e8 9 THIS SOFTWARE IS SUPPLIED "AS IS" WITHOUT ANY WARRANTIES AND SUPPORT. DISPLAYMODULE ASSUMES
displaymodule 0:d6ff5fa503e8 10 NO RESPONSIBILITY OR LIABILITY FOR THE USE OF THE SOFTWARE.
displaymodule 0:d6ff5fa503e8 11 ********************************************************************************************/
displaymodule 0:d6ff5fa503e8 12 // Tested with Xpt2046
displaymodule 0:d6ff5fa503e8 13
displaymodule 0:d6ff5fa503e8 14 #include "DmTouch.h"
displaymodule 7:6cd8c36cbdb3 15 #include "DmTouchCalibration.h"
displaymodule 7:6cd8c36cbdb3 16
displaymodule 7:6cd8c36cbdb3 17 #define MEASUREMENTS 10
displaymodule 0:d6ff5fa503e8 18
displaymodule 0:d6ff5fa503e8 19 #if defined(DM_TOOLCHAIN_ARDUINO)
displaymodule 0:d6ff5fa503e8 20 // disp - which display is used
displaymodule 7:6cd8c36cbdb3 21 // spiMode - How to read SPI-data, Software, Hardware or Auto
displaymodule 7:6cd8c36cbdb3 22 // useIrq - Enable IRQ or disable IRQ
displaymodule 7:6cd8c36cbdb3 23 DmTouch::DmTouch(Display disp, SpiMode spiMode, bool useIrq)
displaymodule 0:d6ff5fa503e8 24
displaymodule 0:d6ff5fa503e8 25 #elif defined (DM_TOOLCHAIN_MBED)
displaymodule 0:d6ff5fa503e8 26 // disp - which display is used
displaymodule 7:6cd8c36cbdb3 27 // spiMode - How to read SPI-data, Software, Hardware or Auto
displaymodule 7:6cd8c36cbdb3 28 DmTouch::DmTouch(Display disp, SpiMode spiMode)
displaymodule 7:6cd8c36cbdb3 29 #endif
displaymodule 0:d6ff5fa503e8 30 {
displaymodule 0:d6ff5fa503e8 31 switch (disp) {
displaymodule 0:d6ff5fa503e8 32 // Display with 40-pin connector on top of adapter board
displaymodule 0:d6ff5fa503e8 33 case DmTouch::DM_TFT28_103:
displaymodule 0:d6ff5fa503e8 34 case DmTouch::DM_TFT24_104:
displaymodule 0:d6ff5fa503e8 35 _cs = D8;
displaymodule 0:d6ff5fa503e8 36 _irq = D10;
displaymodule 0:d6ff5fa503e8 37 _clk = A1;
displaymodule 0:d6ff5fa503e8 38 _mosi = A0;
displaymodule 0:d6ff5fa503e8 39 _miso = D9;
displaymodule 7:6cd8c36cbdb3 40 _hardwareSpi = false;
displaymodule 0:d6ff5fa503e8 41 break;
displaymodule 3:02c19cbc707c 42
displaymodule 0:d6ff5fa503e8 43 case DmTouch::DM_TFT28_105:
displaymodule 0:d6ff5fa503e8 44 _cs = D4;
displaymodule 0:d6ff5fa503e8 45 _irq = D2;
displaymodule 0:d6ff5fa503e8 46 _clk = D13;
displaymodule 0:d6ff5fa503e8 47 _mosi = D11;
displaymodule 0:d6ff5fa503e8 48 _miso = D12;
displaymodule 7:6cd8c36cbdb3 49 _hardwareSpi = true;
displaymodule 0:d6ff5fa503e8 50 break;
displaymodule 0:d6ff5fa503e8 51
displaymodule 0:d6ff5fa503e8 52 case DmTouch::DM_TFT35_107:
displaymodule 0:d6ff5fa503e8 53 default:
displaymodule 0:d6ff5fa503e8 54 _cs = D4;
displaymodule 0:d6ff5fa503e8 55 _irq = D2;
displaymodule 0:d6ff5fa503e8 56 _clk = D13;
displaymodule 0:d6ff5fa503e8 57 _mosi = D11;
displaymodule 0:d6ff5fa503e8 58 _miso = D12;
displaymodule 7:6cd8c36cbdb3 59 _hardwareSpi = true;
displaymodule 0:d6ff5fa503e8 60 break;
displaymodule 0:d6ff5fa503e8 61 }
displaymodule 7:6cd8c36cbdb3 62
displaymodule 7:6cd8c36cbdb3 63 if (spiMode == DmTouch::Hardware) {
displaymodule 7:6cd8c36cbdb3 64 _hardwareSpi = true;
displaymodule 7:6cd8c36cbdb3 65 } else if (spiMode == DmTouch::Software) {
displaymodule 7:6cd8c36cbdb3 66 _hardwareSpi = false;
displaymodule 7:6cd8c36cbdb3 67 }
displaymodule 7:6cd8c36cbdb3 68
displaymodule 7:6cd8c36cbdb3 69 #if defined(DM_TOOLCHAIN_ARDUINO)
displaymodule 7:6cd8c36cbdb3 70 if (!useIrq) {
displaymodule 7:6cd8c36cbdb3 71 _irq = -1;
displaymodule 7:6cd8c36cbdb3 72 }
displaymodule 8:b24f01d148c4 73 #elif defined (DM_TOOLCHAIN_MBED)
displaymodule 8:b24f01d148c4 74 _irq = -1;
displaymodule 0:d6ff5fa503e8 75 #endif
displaymodule 7:6cd8c36cbdb3 76
displaymodule 7:6cd8c36cbdb3 77 setCalibrationMatrix(DmTouchCalibration::getDefaultCalibrationData(disp));
displaymodule 0:d6ff5fa503e8 78
displaymodule 7:6cd8c36cbdb3 79 _samplesPerMeasurement = 3;
displaymodule 0:d6ff5fa503e8 80 }
displaymodule 0:d6ff5fa503e8 81
displaymodule 0:d6ff5fa503e8 82 void DmTouch::init() {
displaymodule 0:d6ff5fa503e8 83 #if defined (DM_TOOLCHAIN_ARDUINO)
displaymodule 0:d6ff5fa503e8 84 pinMode(_cs, OUTPUT);
displaymodule 0:d6ff5fa503e8 85 _pinCS = portOutputRegister(digitalPinToPort(_cs));
displaymodule 0:d6ff5fa503e8 86 _bitmaskCS = digitalPinToBitMask(_cs);
displaymodule 0:d6ff5fa503e8 87
displaymodule 0:d6ff5fa503e8 88 if (_hardwareSpi) {
displaymodule 0:d6ff5fa503e8 89 SPI.begin();
displaymodule 7:6cd8c36cbdb3 90 SPI.setClockDivider(SPI_CLOCK_DIV32);
displaymodule 0:d6ff5fa503e8 91 SPI.setBitOrder(MSBFIRST);
displaymodule 0:d6ff5fa503e8 92 SPI.setDataMode(SPI_MODE0);
displaymodule 0:d6ff5fa503e8 93 _spiSettings = SPCR;
displaymodule 0:d6ff5fa503e8 94 }
displaymodule 0:d6ff5fa503e8 95 else {
displaymodule 0:d6ff5fa503e8 96 pinMode(_clk, OUTPUT);
displaymodule 0:d6ff5fa503e8 97 pinMode(_mosi, OUTPUT);
displaymodule 0:d6ff5fa503e8 98 pinMode(_miso, INPUT);
displaymodule 0:d6ff5fa503e8 99 _pinCLK = portOutputRegister(digitalPinToPort(_clk));
displaymodule 0:d6ff5fa503e8 100 _bitmaskCLK = digitalPinToBitMask(_clk);
displaymodule 0:d6ff5fa503e8 101 _pinMOSI = portOutputRegister(digitalPinToPort(_mosi));
displaymodule 0:d6ff5fa503e8 102 _bitmaskMOSI = digitalPinToBitMask(_mosi);
displaymodule 0:d6ff5fa503e8 103 _pinMISO = portInputRegister(digitalPinToPort(_miso));
displaymodule 0:d6ff5fa503e8 104 _bitmaskMISO = digitalPinToBitMask(_miso);
displaymodule 0:d6ff5fa503e8 105 }
displaymodule 0:d6ff5fa503e8 106 #elif defined (DM_TOOLCHAIN_MBED)
displaymodule 0:d6ff5fa503e8 107 _pinCS = new DigitalOut((PinName)_cs);
displaymodule 0:d6ff5fa503e8 108 if (_hardwareSpi) {
displaymodule 0:d6ff5fa503e8 109 sbi(_pinCS, _bitmaskCS);
displaymodule 0:d6ff5fa503e8 110 _spi = new SPI((PinName)_mosi, (PinName)_miso, (PinName)_clk);
displaymodule 0:d6ff5fa503e8 111 _spi->format(8,0);
displaymodule 0:d6ff5fa503e8 112 _spi->frequency(2000000); // Max SPI speed
displaymodule 0:d6ff5fa503e8 113 //cbi(_pinCS, _bitmaskCS);
displaymodule 0:d6ff5fa503e8 114 } else {
displaymodule 0:d6ff5fa503e8 115 _pinCLK = new DigitalOut((PinName)_clk);
displaymodule 3:02c19cbc707c 116 _pinMISO = new DigitalIn((PinName)_miso);
displaymodule 0:d6ff5fa503e8 117 _pinMOSI = new DigitalOut((PinName)_mosi);
displaymodule 3:02c19cbc707c 118 sbi(_pinCLK, _bitmaskCLK);
displaymodule 0:d6ff5fa503e8 119 }
displaymodule 0:d6ff5fa503e8 120 #endif
displaymodule 0:d6ff5fa503e8 121
displaymodule 0:d6ff5fa503e8 122 if (_irq != -1) { // We will use Touch IRQ
displaymodule 0:d6ff5fa503e8 123 enableIrq();
displaymodule 0:d6ff5fa503e8 124 }
displaymodule 0:d6ff5fa503e8 125 }
displaymodule 0:d6ff5fa503e8 126
displaymodule 0:d6ff5fa503e8 127 void DmTouch::enableIrq() {
displaymodule 0:d6ff5fa503e8 128 #if defined (DM_TOOLCHAIN_ARDUINO)
displaymodule 0:d6ff5fa503e8 129 pinMode(_irq, INPUT);
displaymodule 0:d6ff5fa503e8 130 _pinIrq = portInputRegister(digitalPinToPort(_irq));
displaymodule 0:d6ff5fa503e8 131 _bitmaskIrq = digitalPinToBitMask(_irq);
displaymodule 0:d6ff5fa503e8 132
displaymodule 0:d6ff5fa503e8 133 cbi(_pinCS, _bitmaskCS);
displaymodule 0:d6ff5fa503e8 134 spiWrite(0x80); // Enable PENIRQ
displaymodule 0:d6ff5fa503e8 135 sbi(_pinCS, _bitmaskCS);
displaymodule 8:b24f01d148c4 136 #endif
displaymodule 0:d6ff5fa503e8 137 }
displaymodule 0:d6ff5fa503e8 138
displaymodule 0:d6ff5fa503e8 139 void DmTouch::spiWrite(uint8_t data) {
displaymodule 7:6cd8c36cbdb3 140 if (_hardwareSpi) {
displaymodule 0:d6ff5fa503e8 141 #if defined (DM_TOOLCHAIN_ARDUINO)
displaymodule 0:d6ff5fa503e8 142 SPCR = _spiSettings; // SPI Control Register
displaymodule 0:d6ff5fa503e8 143 SPDR = data; // SPI Data Register
displaymodule 0:d6ff5fa503e8 144 while(!(SPSR & _BV(SPIF))); // SPI Status Register Wait for transmission to finish
displaymodule 0:d6ff5fa503e8 145 #elif defined (DM_TOOLCHAIN_MBED)
displaymodule 0:d6ff5fa503e8 146 _spi->write(data);
displaymodule 7:6cd8c36cbdb3 147 #endif
displaymodule 0:d6ff5fa503e8 148 }
displaymodule 0:d6ff5fa503e8 149 else {
displaymodule 0:d6ff5fa503e8 150 uint8_t count=0;
displaymodule 0:d6ff5fa503e8 151 uint8_t temp = data;
displaymodule 7:6cd8c36cbdb3 152 delay(1);
displaymodule 7:6cd8c36cbdb3 153 cbi(_pinCLK, _bitmaskCLK);
displaymodule 0:d6ff5fa503e8 154 for(count=0;count<8;count++) {
displaymodule 0:d6ff5fa503e8 155 if(temp&0x80) {
displaymodule 0:d6ff5fa503e8 156 sbi(_pinMOSI, _bitmaskMOSI);
displaymodule 0:d6ff5fa503e8 157 }
displaymodule 0:d6ff5fa503e8 158 else {
displaymodule 0:d6ff5fa503e8 159 cbi(_pinMOSI, _bitmaskMOSI);
displaymodule 0:d6ff5fa503e8 160 }
displaymodule 0:d6ff5fa503e8 161
displaymodule 0:d6ff5fa503e8 162 temp=temp<<1;
displaymodule 0:d6ff5fa503e8 163
displaymodule 6:fde03297017b 164 slow_pulse_low(_pinCLK, _bitmaskCLK);
displaymodule 0:d6ff5fa503e8 165 }
displaymodule 0:d6ff5fa503e8 166 }
displaymodule 0:d6ff5fa503e8 167 }
displaymodule 0:d6ff5fa503e8 168
displaymodule 0:d6ff5fa503e8 169 uint8_t DmTouch::spiRead() {// Only used for Hardware SPI
displaymodule 0:d6ff5fa503e8 170 #if defined (DM_TOOLCHAIN_ARDUINO)
displaymodule 0:d6ff5fa503e8 171 uint8_t data;
displaymodule 0:d6ff5fa503e8 172 SPCR = _spiSettings;
displaymodule 0:d6ff5fa503e8 173 spiWrite(0x00);
displaymodule 0:d6ff5fa503e8 174 data = SPDR;
displaymodule 0:d6ff5fa503e8 175
displaymodule 0:d6ff5fa503e8 176 return data;
displaymodule 0:d6ff5fa503e8 177 #elif defined (DM_TOOLCHAIN_MBED)
displaymodule 0:d6ff5fa503e8 178 if (_hardwareSpi) {
displaymodule 0:d6ff5fa503e8 179 return _spi->write(0x00); // dummy byte to read
displaymodule 0:d6ff5fa503e8 180 } else {
displaymodule 0:d6ff5fa503e8 181 uint8_t count=0;
displaymodule 0:d6ff5fa503e8 182 uint8_t temp=0;
displaymodule 7:6cd8c36cbdb3 183 cbi(_pinCLK, _bitmaskCLK);
displaymodule 3:02c19cbc707c 184 cbi(_pinMOSI, _bitmaskMOSI); // same as using 0x00 as dummy byte
displaymodule 0:d6ff5fa503e8 185 for(count=0;count<8;count++) {
displaymodule 0:d6ff5fa503e8 186
displaymodule 0:d6ff5fa503e8 187 pulse_low(_pinCLK, _bitmaskCLK);
displaymodule 0:d6ff5fa503e8 188 temp = temp<<1;
displaymodule 0:d6ff5fa503e8 189 temp |= _pinMISO->read();
displaymodule 0:d6ff5fa503e8 190 }
displaymodule 0:d6ff5fa503e8 191 return temp;
displaymodule 0:d6ff5fa503e8 192 }
displaymodule 0:d6ff5fa503e8 193 #endif
displaymodule 0:d6ff5fa503e8 194 }
displaymodule 0:d6ff5fa503e8 195
displaymodule 0:d6ff5fa503e8 196 uint16_t DmTouch::readData12(uint8_t command) {
displaymodule 0:d6ff5fa503e8 197 uint8_t temp = 0;
displaymodule 0:d6ff5fa503e8 198 uint16_t value = 0;
displaymodule 0:d6ff5fa503e8 199
displaymodule 0:d6ff5fa503e8 200 spiWrite(command); // Send command
displaymodule 7:6cd8c36cbdb3 201
displaymodule 0:d6ff5fa503e8 202 #if defined (DM_TOOLCHAIN_ARDUINO)
displaymodule 0:d6ff5fa503e8 203 if (_hardwareSpi) {
displaymodule 0:d6ff5fa503e8 204 // We use 7-bits from the first byte and 5-bit from the second byte
displaymodule 0:d6ff5fa503e8 205 temp = spiRead();
displaymodule 0:d6ff5fa503e8 206 value = temp<<8;
displaymodule 0:d6ff5fa503e8 207 temp = spiRead();
displaymodule 7:6cd8c36cbdb3 208
displaymodule 7:6cd8c36cbdb3 209 value |= temp;
displaymodule 0:d6ff5fa503e8 210 value >>=3;
displaymodule 0:d6ff5fa503e8 211 value &= 0xFFF;
displaymodule 7:6cd8c36cbdb3 212 } else {
displaymodule 0:d6ff5fa503e8 213 pulse_high(_pinCLK, _bitmaskCLK);
displaymodule 0:d6ff5fa503e8 214 unsigned nop;
displaymodule 0:d6ff5fa503e8 215 uint8_t count=0;
displaymodule 0:d6ff5fa503e8 216 for(count=0;count<12;count++) {
displaymodule 0:d6ff5fa503e8 217 value<<=1;
displaymodule 0:d6ff5fa503e8 218 pulse_high(_pinCLK, _bitmaskCLK);
displaymodule 0:d6ff5fa503e8 219 if ( gbi(_pinMISO, _bitmaskMISO) ) {
displaymodule 0:d6ff5fa503e8 220 value++;
displaymodule 0:d6ff5fa503e8 221 }
displaymodule 0:d6ff5fa503e8 222 }
displaymodule 0:d6ff5fa503e8 223 }
displaymodule 0:d6ff5fa503e8 224 #elif defined (DM_TOOLCHAIN_MBED)
displaymodule 0:d6ff5fa503e8 225 // We use 7-bits from the first byte and 5-bit from the second byte
displaymodule 0:d6ff5fa503e8 226 temp = spiRead();
displaymodule 0:d6ff5fa503e8 227 value = temp<<8;
displaymodule 0:d6ff5fa503e8 228 temp = spiRead();
displaymodule 0:d6ff5fa503e8 229 value |= temp;
displaymodule 0:d6ff5fa503e8 230 value >>=3;
displaymodule 0:d6ff5fa503e8 231 value &= 0xFFF;
displaymodule 0:d6ff5fa503e8 232 #endif
displaymodule 0:d6ff5fa503e8 233 return value;
displaymodule 0:d6ff5fa503e8 234 }
displaymodule 0:d6ff5fa503e8 235
displaymodule 7:6cd8c36cbdb3 236 void DmTouch::readRawData(uint16_t &x, uint16_t &y) {
displaymodule 7:6cd8c36cbdb3 237 cbi(_pinCS, _bitmaskCS);
displaymodule 7:6cd8c36cbdb3 238 x = readData12(0xD0);
displaymodule 7:6cd8c36cbdb3 239 y = readData12(0x90);
displaymodule 7:6cd8c36cbdb3 240 sbi(_pinCS, _bitmaskCS);
displaymodule 7:6cd8c36cbdb3 241 }
displaymodule 7:6cd8c36cbdb3 242
displaymodule 7:6cd8c36cbdb3 243 void DmTouch::readTouchData(uint16_t& posX, uint16_t& posY, bool& touching) {
displaymodule 7:6cd8c36cbdb3 244 uint16_t touchX, touchY;
displaymodule 7:6cd8c36cbdb3 245 getMiddleXY(touchX,touchY);
displaymodule 0:d6ff5fa503e8 246
displaymodule 7:6cd8c36cbdb3 247 posX = getDisplayCoordinateX(touchX, touchY);
displaymodule 7:6cd8c36cbdb3 248 posY = getDisplayCoordinateY(touchX, touchY);
displaymodule 7:6cd8c36cbdb3 249
displaymodule 8:b24f01d148c4 250 #if defined (DM_TOOLCHAIN_ARDUINO)
displaymodule 7:6cd8c36cbdb3 251 touching = isTouched();
displaymodule 8:b24f01d148c4 252 #elif defined (DM_TOOLCHAIN_MBED)
displaymodule 8:b24f01d148c4 253 touching = (posX < 4096 && posY < 4096);
displaymodule 8:b24f01d148c4 254 #endif
displaymodule 0:d6ff5fa503e8 255 }
displaymodule 0:d6ff5fa503e8 256
displaymodule 7:6cd8c36cbdb3 257 bool DmTouch::isSampleValid() {
displaymodule 7:6cd8c36cbdb3 258 uint16_t sampleX,sampleY;
displaymodule 7:6cd8c36cbdb3 259 readRawData(sampleX,sampleY);
displaymodule 7:6cd8c36cbdb3 260 if (sampleX > 0 && sampleX < 4095 && sampleY > 0 && sampleY < 4095) {
displaymodule 7:6cd8c36cbdb3 261 return true;
displaymodule 7:6cd8c36cbdb3 262 } else {
displaymodule 7:6cd8c36cbdb3 263 return false;
displaymodule 7:6cd8c36cbdb3 264 }
displaymodule 7:6cd8c36cbdb3 265 }
displaymodule 7:6cd8c36cbdb3 266
displaymodule 7:6cd8c36cbdb3 267 bool DmTouch::isTouched() {
displaymodule 0:d6ff5fa503e8 268 #if defined (DM_TOOLCHAIN_ARDUINO)
displaymodule 0:d6ff5fa503e8 269 if (_irq == -1) {
displaymodule 7:6cd8c36cbdb3 270 return isSampleValid();
displaymodule 0:d6ff5fa503e8 271 }
displaymodule 0:d6ff5fa503e8 272
displaymodule 0:d6ff5fa503e8 273 if ( !gbi(_pinIrq, _bitmaskIrq) ) {
displaymodule 0:d6ff5fa503e8 274 return true;
displaymodule 0:d6ff5fa503e8 275 }
displaymodule 0:d6ff5fa503e8 276
displaymodule 0:d6ff5fa503e8 277 return false;
displaymodule 0:d6ff5fa503e8 278 #elif defined (DM_TOOLCHAIN_MBED)
displaymodule 8:b24f01d148c4 279 return isSampleValid();
displaymodule 0:d6ff5fa503e8 280 #endif
displaymodule 0:d6ff5fa503e8 281 }
displaymodule 7:6cd8c36cbdb3 282
displaymodule 7:6cd8c36cbdb3 283 bool DmTouch::getMiddleXY(uint16_t &x, uint16_t &y) {
displaymodule 7:6cd8c36cbdb3 284 bool haveAllMeasurements = true;
displaymodule 7:6cd8c36cbdb3 285 uint16_t valuesX[MEASUREMENTS];
displaymodule 7:6cd8c36cbdb3 286 uint16_t valuesY[MEASUREMENTS];
displaymodule 7:6cd8c36cbdb3 287 uint8_t nbrOfMeasurements = 0;
displaymodule 7:6cd8c36cbdb3 288
displaymodule 7:6cd8c36cbdb3 289 for (int i=0; i<MEASUREMENTS; i++) {
displaymodule 7:6cd8c36cbdb3 290 getAverageXY(valuesX[i], valuesY[i]);
displaymodule 7:6cd8c36cbdb3 291 nbrOfMeasurements++;
displaymodule 7:6cd8c36cbdb3 292 if (!isTouched()) {
displaymodule 7:6cd8c36cbdb3 293 haveAllMeasurements = false;
displaymodule 7:6cd8c36cbdb3 294 break;
displaymodule 7:6cd8c36cbdb3 295 }
displaymodule 7:6cd8c36cbdb3 296 }
displaymodule 7:6cd8c36cbdb3 297 x = calculateMiddleValue(valuesX, nbrOfMeasurements);
displaymodule 7:6cd8c36cbdb3 298 y = calculateMiddleValue(valuesY, nbrOfMeasurements);
displaymodule 7:6cd8c36cbdb3 299
displaymodule 7:6cd8c36cbdb3 300 return haveAllMeasurements;
displaymodule 7:6cd8c36cbdb3 301 }
displaymodule 7:6cd8c36cbdb3 302
displaymodule 7:6cd8c36cbdb3 303 void DmTouch::getAverageXY(uint16_t &x, uint16_t &y) {
displaymodule 7:6cd8c36cbdb3 304 uint32_t sumX = 0;
displaymodule 7:6cd8c36cbdb3 305 uint32_t sumY = 0;
displaymodule 7:6cd8c36cbdb3 306 uint16_t sampleX,sampleY;
displaymodule 7:6cd8c36cbdb3 307 readRawData(sampleX,sampleY);
displaymodule 7:6cd8c36cbdb3 308
displaymodule 7:6cd8c36cbdb3 309 for (int i=0; i<_samplesPerMeasurement; i++) {
displaymodule 7:6cd8c36cbdb3 310 readRawData(sampleX,sampleY);
displaymodule 7:6cd8c36cbdb3 311 sumX += sampleX;
displaymodule 7:6cd8c36cbdb3 312 sumY += sampleY;
displaymodule 7:6cd8c36cbdb3 313 }
displaymodule 7:6cd8c36cbdb3 314
displaymodule 7:6cd8c36cbdb3 315 x = (uint32_t)sumX/_samplesPerMeasurement;
displaymodule 7:6cd8c36cbdb3 316 y = (uint32_t)sumY/_samplesPerMeasurement;
displaymodule 7:6cd8c36cbdb3 317 }
displaymodule 7:6cd8c36cbdb3 318
displaymodule 7:6cd8c36cbdb3 319 // Total number of samples = MEASUREMENTS * _samplesPerMeasurement
displaymodule 7:6cd8c36cbdb3 320 void DmTouch::setPrecison(uint8_t samplesPerMeasurement) {
displaymodule 7:6cd8c36cbdb3 321 _samplesPerMeasurement = samplesPerMeasurement;
displaymodule 7:6cd8c36cbdb3 322 }
displaymodule 7:6cd8c36cbdb3 323
displaymodule 7:6cd8c36cbdb3 324 void DmTouch::setCalibrationMatrix(CalibrationMatrix calibrationMatrix) {
displaymodule 7:6cd8c36cbdb3 325 _calibrationMatrix = calibrationMatrix;
displaymodule 7:6cd8c36cbdb3 326 }
displaymodule 7:6cd8c36cbdb3 327
displaymodule 7:6cd8c36cbdb3 328 void DmTouch::waitForTouch() {
displaymodule 7:6cd8c36cbdb3 329 while(!isTouched()) {}
displaymodule 7:6cd8c36cbdb3 330 }
displaymodule 7:6cd8c36cbdb3 331
displaymodule 7:6cd8c36cbdb3 332 void DmTouch::waitForTouchRelease() {
displaymodule 7:6cd8c36cbdb3 333 while(isTouched()) {}
displaymodule 7:6cd8c36cbdb3 334 }
displaymodule 7:6cd8c36cbdb3 335
displaymodule 7:6cd8c36cbdb3 336 uint16_t DmTouch::getDisplayCoordinateX(uint16_t x_touch, uint16_t y_touch) {
displaymodule 7:6cd8c36cbdb3 337 uint16_t Xd;
displaymodule 7:6cd8c36cbdb3 338 float temp;
displaymodule 7:6cd8c36cbdb3 339 temp = (_calibrationMatrix.a * x_touch + _calibrationMatrix.b * y_touch + _calibrationMatrix.c) / rescaleFactor();
displaymodule 7:6cd8c36cbdb3 340 Xd = (uint16_t)(temp);
displaymodule 7:6cd8c36cbdb3 341 if (Xd > 60000) {
displaymodule 7:6cd8c36cbdb3 342 Xd = 0;
displaymodule 7:6cd8c36cbdb3 343 }
displaymodule 7:6cd8c36cbdb3 344 return Xd;
displaymodule 7:6cd8c36cbdb3 345 }
displaymodule 7:6cd8c36cbdb3 346
displaymodule 7:6cd8c36cbdb3 347 uint16_t DmTouch::getDisplayCoordinateY(uint16_t x_touch, uint16_t y_touch) {
displaymodule 7:6cd8c36cbdb3 348 uint16_t Yd;
displaymodule 7:6cd8c36cbdb3 349 float temp;
displaymodule 7:6cd8c36cbdb3 350 temp = (_calibrationMatrix.d * x_touch + _calibrationMatrix.e * y_touch + _calibrationMatrix.f) / rescaleFactor();
displaymodule 7:6cd8c36cbdb3 351 Yd = (uint16_t)(temp);
displaymodule 7:6cd8c36cbdb3 352 if (Yd > 60000) {
displaymodule 7:6cd8c36cbdb3 353 Yd = 0;
displaymodule 7:6cd8c36cbdb3 354 }
displaymodule 7:6cd8c36cbdb3 355 return Yd;
displaymodule 7:6cd8c36cbdb3 356 }
displaymodule 7:6cd8c36cbdb3 357
displaymodule 7:6cd8c36cbdb3 358 uint16_t DmTouch::calculateMiddleValue(uint16_t values[], uint8_t count) {
displaymodule 7:6cd8c36cbdb3 359 uint16_t temp;
displaymodule 7:6cd8c36cbdb3 360
displaymodule 7:6cd8c36cbdb3 361 for(uint8_t i=0; i<count-1; i++) {
displaymodule 7:6cd8c36cbdb3 362 for(uint8_t j=i+1; j<count; j++) {
displaymodule 7:6cd8c36cbdb3 363 if(values[j] < values[i]) {
displaymodule 7:6cd8c36cbdb3 364 temp = values[i];
displaymodule 7:6cd8c36cbdb3 365 values[i] = values[j];
displaymodule 7:6cd8c36cbdb3 366 values[j] = temp;
displaymodule 7:6cd8c36cbdb3 367 }
displaymodule 7:6cd8c36cbdb3 368 }
displaymodule 7:6cd8c36cbdb3 369 }
displaymodule 7:6cd8c36cbdb3 370
displaymodule 7:6cd8c36cbdb3 371 if(count%2==0) {
displaymodule 7:6cd8c36cbdb3 372 return((values[count/2] + values[count/2 - 1]) / 2.0);
displaymodule 7:6cd8c36cbdb3 373 } else {
displaymodule 7:6cd8c36cbdb3 374 return values[count/2];
displaymodule 7:6cd8c36cbdb3 375 }
displaymodule 7:6cd8c36cbdb3 376 }