David Smart / RA8875 Featured

Library to control a Graphics TFT connected to 4-wire SPI - revised for the Raio RA8875 Display Controller.

Dependents:   FRDM_RA8875_mPaint RA8875_Demo RA8875_KeyPadDemo SignalGenerator ... more

Fork of SPI_TFT by Peter Drescher

See Components - RA8875 Based Display

Enhanced touch-screen support - where it previous supported both the Resistive Touch and Capacitive Touch based on the FT5206 Touch Controller, now it also has support for the GSL1680 Touch Controller.

Offline Help Manual (Windows chm)

/media/uploads/WiredHome/ra8875.zip.bin (download, rename to .zip and unzip)

RA8875_Touch.cpp@202:a22cbc04f332, 2020-04-30 (annotated)

Committer:
WiredHome
Date:
Thu Apr 30 13:51:32 2020 +0000
Revision:
202:a22cbc04f332
Parent:
198:9b6851107426
Child:
203:704df2dbd3e6
Private max,min macros; avoid collision with other libs.; Correct jpg rendering defect; window() to SetWindow().; Coordinate translation for touch with orientation.; Added method; get rendered rect_t for string.; Fix for the reset pin option.;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
WiredHome 78:faf49c381591 1 /// This file contains the RA8875 Touch panel methods.
WiredHome 78:faf49c381591 2 ///
WiredHome 124:1690a7ae871c 3 /// It combines both resistive and capacitive touch methods, and tries
WiredHome 124:1690a7ae871c 4 /// to make them nearly transparent alternates for each other.
WiredHome 124:1690a7ae871c 5 ///
WiredHome 78:faf49c381591 6 #include "RA8875.h"
WiredHome 165:695c24cc5197 7 #include "RA8875_Touch_FT5206.h"
WiredHome 165:695c24cc5197 8 #include "RA8875_Touch_GSL1680.h"
WiredHome 78:faf49c381591 9
WiredHome 83:7bad0068cca0 10 #define NOTOUCH_TIMEOUT_uS 100000
WiredHome 83:7bad0068cca0 11 #define TOUCH_TICKER_uS 1000
WiredHome 83:7bad0068cca0 12
WiredHome 171:f92c0f1f6db4 13 //#define DEBUG "TUCH"
WiredHome 154:ad2450fc3dc3 14 // ...
WiredHome 154:ad2450fc3dc3 15 // INFO("Stuff to show %d", var); // new-line is automatically appended
WiredHome 154:ad2450fc3dc3 16 //
WiredHome 154:ad2450fc3dc3 17 #if (defined(DEBUG) && !defined(TARGET_LPC11U24))
WiredHome 197:853d08e2fb53 18 #define INFO(x, ...) std::printf("[INF %s %4d] " x "\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
WiredHome 197:853d08e2fb53 19 #define WARN(x, ...) std::printf("[WRN %s %4d] " x "\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
WiredHome 197:853d08e2fb53 20 #define ERR(x, ...) std::printf("[ERR %s %4d] " x "\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
WiredHome 154:ad2450fc3dc3 21 static void HexDump(const char * title, const uint8_t * p, int count)
WiredHome 154:ad2450fc3dc3 22 {
WiredHome 154:ad2450fc3dc3 23 int i;
WiredHome 154:ad2450fc3dc3 24 char buf[100] = "0000: ";
WiredHome 154:ad2450fc3dc3 25
WiredHome 154:ad2450fc3dc3 26 if (*title)
WiredHome 154:ad2450fc3dc3 27 INFO("%s", title);
WiredHome 154:ad2450fc3dc3 28 for (i=0; i<count; ) {
WiredHome 154:ad2450fc3dc3 29 sprintf(buf + strlen(buf), "%02X ", *(p+i));
WiredHome 154:ad2450fc3dc3 30 if ((++i & 0x0F) == 0x00) {
WiredHome 154:ad2450fc3dc3 31 INFO("%s", buf);
WiredHome 154:ad2450fc3dc3 32 if (i < count)
WiredHome 154:ad2450fc3dc3 33 sprintf(buf, "%04X: ", i);
WiredHome 154:ad2450fc3dc3 34 else
WiredHome 154:ad2450fc3dc3 35 buf[0] = '\0';
WiredHome 154:ad2450fc3dc3 36 }
WiredHome 154:ad2450fc3dc3 37 }
WiredHome 154:ad2450fc3dc3 38 if (strlen(buf))
WiredHome 154:ad2450fc3dc3 39 INFO("%s", buf);
WiredHome 154:ad2450fc3dc3 40 }
WiredHome 154:ad2450fc3dc3 41 #else
WiredHome 154:ad2450fc3dc3 42 #define INFO(x, ...)
WiredHome 154:ad2450fc3dc3 43 #define WARN(x, ...)
WiredHome 154:ad2450fc3dc3 44 #define ERR(x, ...)
WiredHome 154:ad2450fc3dc3 45 #define HexDump(a, b, c)
WiredHome 154:ad2450fc3dc3 46 #endif
WiredHome 154:ad2450fc3dc3 47
WiredHome 124:1690a7ae871c 48
WiredHome 78:faf49c381591 49 RetCode_t RA8875::TouchPanelInit(void)
WiredHome 78:faf49c381591 50 {
WiredHome 157:1565f38ca44b 51 RetCode_t r = noerror;
WiredHome 190:3132b7dfad82 52
WiredHome 124:1690a7ae871c 53 panelTouched = false;
WiredHome 165:695c24cc5197 54 if (useTouchPanel == TP_GSL1680) {
WiredHome 165:695c24cc5197 55 INFO("TouchPanelInit: TP_GSL1680");
WiredHome 169:1c1a495983bc 56 r = GSL1680_Init();
WiredHome 165:695c24cc5197 57 } else if (useTouchPanel == TP_FT5206) {
WiredHome 124:1690a7ae871c 58 // Set to normal mode
WiredHome 165:695c24cc5197 59 INFO("TouchPanelInit: TP_FT5206");
WiredHome 165:695c24cc5197 60 r = FT5206_Init();
WiredHome 124:1690a7ae871c 61 } else {
WiredHome 155:b3f225ae572c 62 INFO("TouchPanelInit: TP_RES");
WiredHome 197:853d08e2fb53 63 //RA8875_TPCR0: Set enable bit, default sample time, wakeup, and ADC clock
WiredHome 193:74f80834d59d 64 WriteCommand(RA8875_TPCR0, TP_ENABLE | TP_ADC_SAMPLE_DEFAULT_CLKS | TP_ADC_CLKDIV_DEFAULT);
WiredHome 197:853d08e2fb53 65 // RA8875_TPCR1: Set auto/manual, Ref voltage, debounce, manual mode params
WiredHome 193:74f80834d59d 66 WriteCommand(RA8875_TPCR1, TP_MODE_DEFAULT | TP_DEBOUNCE_DEFAULT);
WiredHome 193:74f80834d59d 67 WriteCommand(RA8875_INTC1, ReadCommand(RA8875_INTC1) | RA8875_INT_TP); // reg RA8875_INTC1: Enable Touch Panel Interrupts (D2 = 1)
WiredHome 193:74f80834d59d 68 WriteCommand(RA8875_INTC2, RA8875_INT_TP); // reg RA8875_INTC2: Clear any TP interrupt flag
WiredHome 124:1690a7ae871c 69 touchSample = 0;
WiredHome 124:1690a7ae871c 70 touchState = no_cal;
WiredHome 193:74f80834d59d 71 #if 0
WiredHome 181:0032d1b8f5d4 72 #if (MBED_MAJOR_VERSION >= 5) || (MBED_LIBRARY_VERSION > 127)
WiredHome 145:5eb2492acdda 73 touchTicker.attach_us(callback(this, &RA8875::_TouchTicker), TOUCH_TICKER_uS);
WiredHome 150:35a4db3081c1 74 #else
WiredHome 150:35a4db3081c1 75 touchTicker.attach_us(this, &RA8875::_TouchTicker, TOUCH_TICKER_uS);
WiredHome 150:35a4db3081c1 76 #endif
WiredHome 193:74f80834d59d 77 #endif
WiredHome 165:695c24cc5197 78 timeSinceTouch.start();
WiredHome 165:695c24cc5197 79 timeSinceTouch.reset();
WiredHome 157:1565f38ca44b 80 r = _internal_ts_cal();
WiredHome 83:7bad0068cca0 81 }
WiredHome 157:1565f38ca44b 82 return r;
WiredHome 78:faf49c381591 83 }
WiredHome 78:faf49c381591 84
WiredHome 124:1690a7ae871c 85
WiredHome 124:1690a7ae871c 86 RetCode_t RA8875::TouchPanelInit(uint8_t bTpEnable, uint8_t bTpAutoManual, uint8_t bTpDebounce, uint8_t bTpManualMode, uint8_t bTpAdcClkDiv, uint8_t bTpAdcSampleTime)
WiredHome 124:1690a7ae871c 87 {
WiredHome 165:695c24cc5197 88 if (useTouchPanel == TP_GSL1680) {
WiredHome 165:695c24cc5197 89 INFO("TouchPanelInit: TP_GSL1680");
WiredHome 165:695c24cc5197 90 } else if (useTouchPanel == TP_FT5206) {
WiredHome 165:695c24cc5197 91 INFO("TouchPanelInit: TP_FT5206");
WiredHome 124:1690a7ae871c 92 TouchPanelInit();
WiredHome 124:1690a7ae871c 93 } else {
WiredHome 155:b3f225ae572c 94 INFO("TouchPanelInit: TP_RES");
WiredHome 124:1690a7ae871c 95 // Parameter bounds check
WiredHome 124:1690a7ae871c 96 if( \
WiredHome 124:1690a7ae871c 97 !(bTpEnable == TP_ENABLE || bTpEnable == TP_ENABLE) || \
WiredHome 124:1690a7ae871c 98 !(bTpAutoManual == TP_MODE_AUTO || bTpAutoManual == TP_MODE_MANUAL) || \
WiredHome 124:1690a7ae871c 99 !(bTpDebounce == TP_DEBOUNCE_OFF || bTpDebounce == TP_DEBOUNCE_ON) || \
WiredHome 124:1690a7ae871c 100 !(bTpManualMode <= TP_MANUAL_LATCH_Y) || \
WiredHome 124:1690a7ae871c 101 !(bTpAdcClkDiv <= TP_ADC_CLKDIV_128) || \
WiredHome 124:1690a7ae871c 102 !(bTpAdcSampleTime <= TP_ADC_SAMPLE_65536_CLKS) \
WiredHome 124:1690a7ae871c 103 ) return bad_parameter;
WiredHome 197:853d08e2fb53 104 // Construct the config byte for RA8875_TPCR0 and write them
WiredHome 193:74f80834d59d 105 WriteCommand(RA8875_TPCR0, bTpEnable | bTpAdcClkDiv | bTpAdcSampleTime); // Note: Wakeup is never enabled
WiredHome 197:853d08e2fb53 106 // Construct the config byte for RA8875_TPCR1 and write them
WiredHome 193:74f80834d59d 107 WriteCommand(RA8875_TPCR1, bTpDebounce | bTpManualMode); // Note: Always uses internal Vref.
WiredHome 124:1690a7ae871c 108 // Set up the interrupt flag and enable bits
WiredHome 193:74f80834d59d 109 WriteCommand(RA8875_INTC1, ReadCommand(RA8875_INTC1) | RA8875_INT_TP); // reg RA8875_INTC1: Enable Touch Panel Interrupts (D2 = 1)
WiredHome 193:74f80834d59d 110 WriteCommand(RA8875_INTC2, RA8875_INT_TP); // reg RA8875_INTC2: Clear any TP interrupt flag
WiredHome 124:1690a7ae871c 111 touchSample = 0;
WiredHome 124:1690a7ae871c 112 touchState = no_cal;
WiredHome 124:1690a7ae871c 113 if (bTpEnable == TP_ENABLE) {
WiredHome 150:35a4db3081c1 114 //touchTicker.attach_us(callback(this, &RA8875::_TouchTicker), TOUCH_TICKER_uS);
WiredHome 181:0032d1b8f5d4 115 #if (MBED_MAJOR_VERSION >= 5) || (MBED_LIBRARY_VERSION > 127)
WiredHome 145:5eb2492acdda 116 touchTicker.attach_us(callback(this, &RA8875::_TouchTicker), TOUCH_TICKER_uS);
WiredHome 150:35a4db3081c1 117 #else
WiredHome 150:35a4db3081c1 118 touchTicker.attach_us(this, &RA8875::_TouchTicker, TOUCH_TICKER_uS);
WiredHome 150:35a4db3081c1 119 #endif
WiredHome 150:35a4db3081c1 120
WiredHome 165:695c24cc5197 121 timeSinceTouch.start();
WiredHome 165:695c24cc5197 122 timeSinceTouch.reset();
WiredHome 124:1690a7ae871c 123 } else {
WiredHome 124:1690a7ae871c 124 touchTicker.detach();
WiredHome 165:695c24cc5197 125 timeSinceTouch.stop();
WiredHome 124:1690a7ae871c 126 }
WiredHome 157:1565f38ca44b 127 _internal_ts_cal();
WiredHome 124:1690a7ae871c 128 }
WiredHome 124:1690a7ae871c 129 return noerror;
WiredHome 124:1690a7ae871c 130 }
WiredHome 124:1690a7ae871c 131
WiredHome 124:1690a7ae871c 132
WiredHome 124:1690a7ae871c 133 int RA8875::TouchChannels(void)
WiredHome 124:1690a7ae871c 134 {
WiredHome 165:695c24cc5197 135 if (useTouchPanel == TP_GSL1680) {
WiredHome 176:4ab96d33a8ec 136 return GSL1680_TOUCH_POINTS; // based on TP_GSL1680 firmware
WiredHome 165:695c24cc5197 137 } else if (useTouchPanel == TP_FT5206) {
WiredHome 176:4ab96d33a8ec 138 return FT5206_TOUCH_POINTS; // based on the FT5206 hardware
WiredHome 124:1690a7ae871c 139 } else if (useTouchPanel == TP_RES) {
WiredHome 176:4ab96d33a8ec 140 return RESISTIVE_TOUCH_POINTS; // based on the RA8875 resistive touch driver
WiredHome 124:1690a7ae871c 141 } else {
WiredHome 124:1690a7ae871c 142 return 0; // it isn't enabled, so there are none.
WiredHome 124:1690a7ae871c 143 }
WiredHome 124:1690a7ae871c 144 }
WiredHome 124:1690a7ae871c 145
WiredHome 124:1690a7ae871c 146
WiredHome 124:1690a7ae871c 147 // +----------------------------------------------------+
WiredHome 124:1690a7ae871c 148 // | |
WiredHome 124:1690a7ae871c 149 // | 1 |
WiredHome 124:1690a7ae871c 150 // | |
WiredHome 124:1690a7ae871c 151 // | |
WiredHome 124:1690a7ae871c 152 // | 2 |
WiredHome 124:1690a7ae871c 153 // | |
WiredHome 124:1690a7ae871c 154 // | |
WiredHome 124:1690a7ae871c 155 // | 3 |
WiredHome 124:1690a7ae871c 156 // | |
WiredHome 124:1690a7ae871c 157 // +----------------------------------------------------+
WiredHome 81:01da2e34283d 158
WiredHome 81:01da2e34283d 159 RetCode_t RA8875::TouchPanelCalibrate(tpMatrix_t * matrix)
WiredHome 81:01da2e34283d 160 {
WiredHome 81:01da2e34283d 161 return TouchPanelCalibrate(NULL, matrix);
WiredHome 81:01da2e34283d 162 }
WiredHome 81:01da2e34283d 163
WiredHome 88:bfddef6ec836 164 RetCode_t RA8875::TouchPanelCalibrate(const char * msg, tpMatrix_t * matrix, int maxwait_s)
WiredHome 81:01da2e34283d 165 {
WiredHome 81:01da2e34283d 166 point_t pTest[3];
WiredHome 81:01da2e34283d 167 point_t pSample[3];
WiredHome 83:7bad0068cca0 168 int x,y;
WiredHome 88:bfddef6ec836 169 Timer timeout; // timeout guards for not-installed, stuck, user not present...
WiredHome 124:1690a7ae871c 170
WiredHome 88:bfddef6ec836 171 timeout.start();
WiredHome 123:2f45e80fec5f 172 while (TouchPanelA2DFiltered(&x, &y) && timeout.read() < maxwait_s) {
WiredHome 197:853d08e2fb53 173 wait_us(20000);
WiredHome 123:2f45e80fec5f 174 if (idle_callback) {
WiredHome 149:c62c4b2d6a15 175 if (external_abort == (*idle_callback)(touchcal_wait, 0)) {
WiredHome 123:2f45e80fec5f 176 return external_abort;
WiredHome 123:2f45e80fec5f 177 }
WiredHome 123:2f45e80fec5f 178 }
WiredHome 123:2f45e80fec5f 179 }
WiredHome 81:01da2e34283d 180 cls();
WiredHome 157:1565f38ca44b 181 if (msg) { // User defines the message
WiredHome 157:1565f38ca44b 182 if (*msg) puts(msg); // If any
WiredHome 157:1565f38ca44b 183 } else { // Default message
WiredHome 157:1565f38ca44b 184 puts("Touch '+' to calibrate the touch panel");
WiredHome 157:1565f38ca44b 185 }
WiredHome 81:01da2e34283d 186 SetTextCursor(0,height()/2);
WiredHome 124:1690a7ae871c 187 pTest[0].x = 50;
WiredHome 124:1690a7ae871c 188 pTest[0].y = 50;
WiredHome 124:1690a7ae871c 189 pTest[1].x = width() - 50;
WiredHome 124:1690a7ae871c 190 pTest[1].y = height()/2;
WiredHome 124:1690a7ae871c 191 pTest[2].x = width()/2;
WiredHome 124:1690a7ae871c 192 pTest[2].y = height() - 50;
WiredHome 88:bfddef6ec836 193
WiredHome 81:01da2e34283d 194 for (int i=0; i<3; i++) {
WiredHome 81:01da2e34283d 195 foreground(Blue);
WiredHome 81:01da2e34283d 196 printf(" (%3d,%3d) => ", pTest[i].x, pTest[i].y);
WiredHome 157:1565f38ca44b 197 fillcircle(pTest[i].x,pTest[i].y, 20, White);
WiredHome 157:1565f38ca44b 198 line(pTest[i].x-10, pTest[i].y, pTest[i].x+10, pTest[i].y, Blue);
WiredHome 157:1565f38ca44b 199 line(pTest[i].x, pTest[i].y-10, pTest[i].x, pTest[i].y+10, Blue);
WiredHome 123:2f45e80fec5f 200 while (!TouchPanelA2DFiltered(&x, &y) && timeout.read() < maxwait_s) {
WiredHome 197:853d08e2fb53 201 wait_us(20000);
WiredHome 123:2f45e80fec5f 202 if (idle_callback) {
WiredHome 149:c62c4b2d6a15 203 if (external_abort == (*idle_callback)(touchcal_wait, 0)) {
WiredHome 123:2f45e80fec5f 204 return external_abort;
WiredHome 123:2f45e80fec5f 205 }
WiredHome 123:2f45e80fec5f 206 }
WiredHome 123:2f45e80fec5f 207 }
WiredHome 81:01da2e34283d 208 pSample[i].x = x;
WiredHome 81:01da2e34283d 209 pSample[i].y = y;
WiredHome 157:1565f38ca44b 210 fillcircle(pTest[i].x,pTest[i].y, 20, Black); // Erase the target
WiredHome 157:1565f38ca44b 211 //line(pTest[i].x-10, pTest[i].y, pTest[i].x+10, pTest[i].y, Black);
WiredHome 157:1565f38ca44b 212 //line(pTest[i].x, pTest[i].y-10, pTest[i].x, pTest[i].y+10, Black);
WiredHome 81:01da2e34283d 213 foreground(Blue);
WiredHome 81:01da2e34283d 214 printf(" (%4d,%4d)\r\n", x,y);
WiredHome 123:2f45e80fec5f 215 while (TouchPanelA2DFiltered(&x, &y) && timeout.read() < maxwait_s) {
WiredHome 197:853d08e2fb53 216 wait_us(20000);
WiredHome 123:2f45e80fec5f 217 if (idle_callback) {
WiredHome 149:c62c4b2d6a15 218 if (external_abort == (*idle_callback)(touchcal_wait, 0)) {
WiredHome 123:2f45e80fec5f 219 return external_abort;
WiredHome 123:2f45e80fec5f 220 }
WiredHome 123:2f45e80fec5f 221 }
WiredHome 123:2f45e80fec5f 222 }
WiredHome 123:2f45e80fec5f 223 for (int t=0; t<100; t++) {
WiredHome 197:853d08e2fb53 224 wait_us(20000);
WiredHome 123:2f45e80fec5f 225 if (idle_callback) {
WiredHome 149:c62c4b2d6a15 226 if (external_abort == (*idle_callback)(touchcal_wait, 0)) {
WiredHome 123:2f45e80fec5f 227 return external_abort;
WiredHome 123:2f45e80fec5f 228 }
WiredHome 123:2f45e80fec5f 229 }
WiredHome 123:2f45e80fec5f 230 }
WiredHome 81:01da2e34283d 231 }
WiredHome 88:bfddef6ec836 232 if (timeout.read() >= maxwait_s)
WiredHome 88:bfddef6ec836 233 return touch_cal_timeout;
WiredHome 88:bfddef6ec836 234 else
WiredHome 88:bfddef6ec836 235 return TouchPanelComputeCalibration(pTest, pSample, matrix);
WiredHome 81:01da2e34283d 236 }
WiredHome 81:01da2e34283d 237
WiredHome 81:01da2e34283d 238
WiredHome 81:01da2e34283d 239 /**********************************************************************
WiredHome 81:01da2e34283d 240 *
WiredHome 123:2f45e80fec5f 241 * Function: TouchPanelReadable()
WiredHome 81:01da2e34283d 242 *
WiredHome 81:01da2e34283d 243 */
WiredHome 83:7bad0068cca0 244 TouchCode_t RA8875::TouchPanelReadable(point_t * TouchPoint)
WiredHome 81:01da2e34283d 245 {
WiredHome 124:1690a7ae871c 246 TouchCode_t ts = no_touch;
WiredHome 124:1690a7ae871c 247
WiredHome 165:695c24cc5197 248 if (useTouchPanel == TP_FT5206) {
WiredHome 198:9b6851107426 249 //INFO("TP_FT5206");
WiredHome 165:695c24cc5197 250 } else if (useTouchPanel == TP_GSL1680) {
WiredHome 198:9b6851107426 251 //INFO("TP_GSL1680");
WiredHome 165:695c24cc5197 252 } else if (useTouchPanel == TP_RES) {
WiredHome 198:9b6851107426 253 ReadResistive();
WiredHome 124:1690a7ae871c 254 }
WiredHome 165:695c24cc5197 255 // For Resistive touch, panelTouched is computed above.
WiredHome 165:695c24cc5197 256 // For Cap Sense, panelTouched is set in another process
WiredHome 124:1690a7ae871c 257 if (panelTouched == true) {
WiredHome 124:1690a7ae871c 258 panelTouched = false;
WiredHome 124:1690a7ae871c 259 if (TouchPoint) {
WiredHome 202:a22cbc04f332 260 *TouchPoint = touchInfo[0].coordinates;
WiredHome 124:1690a7ae871c 261 ts = touchInfo[0].touchCode;
WiredHome 193:74f80834d59d 262 #ifdef DEBUG
WiredHome 193:74f80834d59d 263 static TouchCode_t lastTS = no_touch;
WiredHome 193:74f80834d59d 264 if (lastTS != ts)
WiredHome 197:853d08e2fb53 265 INFO("Touch[0] %2d (%4d,%4d)", touchInfo[0].touchCode,
WiredHome 197:853d08e2fb53 266 touchInfo[0].coordinates.x, touchInfo[0].coordinates.y);
WiredHome 193:74f80834d59d 267 lastTS = ts;
WiredHome 193:74f80834d59d 268 #endif
WiredHome 130:d633e80840e0 269 } else {
WiredHome 130:d633e80840e0 270 ts = touch;
WiredHome 124:1690a7ae871c 271 }
WiredHome 81:01da2e34283d 272 }
WiredHome 83:7bad0068cca0 273 return ts;
WiredHome 81:01da2e34283d 274 }
WiredHome 81:01da2e34283d 275
WiredHome 190:3132b7dfad82 276 uint8_t RA8875::TouchID(uint8_t channel)
WiredHome 166:53fd4a876dac 277 {
WiredHome 166:53fd4a876dac 278 if (channel >= TouchChannels())
WiredHome 166:53fd4a876dac 279 channel = 0;
WiredHome 190:3132b7dfad82 280 return touchInfo[channel].touchID;
WiredHome 166:53fd4a876dac 281 }
WiredHome 166:53fd4a876dac 282
WiredHome 190:3132b7dfad82 283 TouchCode_t RA8875::TouchCode(uint8_t channel)
WiredHome 190:3132b7dfad82 284 {
WiredHome 166:53fd4a876dac 285 if (channel >= TouchChannels())
WiredHome 166:53fd4a876dac 286 channel = 0;
WiredHome 181:0032d1b8f5d4 287 INFO("TouchCode[%d] = %d", channel, touchInfo[channel].touchCode);
WiredHome 181:0032d1b8f5d4 288 return touchInfo[channel].touchCode;
WiredHome 166:53fd4a876dac 289 }
WiredHome 166:53fd4a876dac 290
WiredHome 166:53fd4a876dac 291 point_t RA8875::TouchCoordinates(uint8_t channel)
WiredHome 166:53fd4a876dac 292 {
WiredHome 166:53fd4a876dac 293 if (channel >= TouchChannels())
WiredHome 166:53fd4a876dac 294 channel = 0;
WiredHome 202:a22cbc04f332 295 return touchInfo[channel].coordinates; // TranslateOrientation(touchInfo[channel].coordinates);
WiredHome 166:53fd4a876dac 296 }
WiredHome 81:01da2e34283d 297
WiredHome 85:022bba13c5c4 298 TouchCode_t RA8875::TouchPanelGet(point_t * TouchPoint)
WiredHome 85:022bba13c5c4 299 {
WiredHome 123:2f45e80fec5f 300 TouchCode_t t = no_touch;
WiredHome 124:1690a7ae871c 301
WiredHome 123:2f45e80fec5f 302 while (true) {
WiredHome 85:022bba13c5c4 303 t = TouchPanelReadable(TouchPoint);
WiredHome 123:2f45e80fec5f 304 if (t != no_touch)
WiredHome 123:2f45e80fec5f 305 break;
WiredHome 123:2f45e80fec5f 306 if (idle_callback) {
WiredHome 149:c62c4b2d6a15 307 if (external_abort == (*idle_callback)(touch_wait, 0)) {
WiredHome 123:2f45e80fec5f 308 return no_touch;
WiredHome 123:2f45e80fec5f 309 }
WiredHome 123:2f45e80fec5f 310 }
WiredHome 123:2f45e80fec5f 311 }
WiredHome 85:022bba13c5c4 312 return t;
WiredHome 85:022bba13c5c4 313 }
WiredHome 85:022bba13c5c4 314
WiredHome 202:a22cbc04f332 315 #if 0
WiredHome 181:0032d1b8f5d4 316 point_t RA8875::TranslateOrientation(point_t rawPoint)
WiredHome 181:0032d1b8f5d4 317 {
WiredHome 181:0032d1b8f5d4 318 point_t newPoint = rawPoint;
WiredHome 190:3132b7dfad82 319
WiredHome 181:0032d1b8f5d4 320 switch (screen_orientation) {
WiredHome 181:0032d1b8f5d4 321 default:
WiredHome 181:0032d1b8f5d4 322 case rotate_0:
WiredHome 198:9b6851107426 323 case rotate_180:
WiredHome 181:0032d1b8f5d4 324 newPoint = rawPoint;
WiredHome 181:0032d1b8f5d4 325 break;
WiredHome 181:0032d1b8f5d4 326 case rotate_90:
WiredHome 181:0032d1b8f5d4 327 newPoint.x = rawPoint.y;
WiredHome 198:9b6851107426 328 newPoint.y = rawPoint.x;
WiredHome 181:0032d1b8f5d4 329 break;
WiredHome 181:0032d1b8f5d4 330 case rotate_270:
WiredHome 198:9b6851107426 331 newPoint.x = width() - rawPoint.y;
WiredHome 181:0032d1b8f5d4 332 newPoint.y = rawPoint.x;
WiredHome 181:0032d1b8f5d4 333 break;
WiredHome 181:0032d1b8f5d4 334 }
WiredHome 193:74f80834d59d 335 //INFO("Translate(%3d x %3d) => (%3d x %3d)", rawPoint.x, rawPoint.y, newPoint.x, newPoint.y);
WiredHome 181:0032d1b8f5d4 336 return newPoint;
WiredHome 181:0032d1b8f5d4 337 }
WiredHome 202:a22cbc04f332 338 #endif
WiredHome 181:0032d1b8f5d4 339
WiredHome 123:2f45e80fec5f 340 // Below here are primarily "helper" functions. While many are accessible
WiredHome 123:2f45e80fec5f 341 // to the user code, they usually don't need to be called.
WiredHome 123:2f45e80fec5f 342
WiredHome 81:01da2e34283d 343 RetCode_t RA8875::TouchPanelSetMatrix(tpMatrix_t * matrixPtr)
WiredHome 81:01da2e34283d 344 {
WiredHome 81:01da2e34283d 345 if (matrixPtr == NULL || matrixPtr->Divider == 0)
WiredHome 81:01da2e34283d 346 return bad_parameter;
WiredHome 81:01da2e34283d 347 memcpy(&tpMatrix, matrixPtr, sizeof(tpMatrix_t));
WiredHome 83:7bad0068cca0 348 touchState = no_touch;
WiredHome 81:01da2e34283d 349 return noerror;
WiredHome 81:01da2e34283d 350 }
WiredHome 81:01da2e34283d 351
WiredHome 157:1565f38ca44b 352 const tpMatrix_t * RA8875::TouchPanelGetMatrix()
WiredHome 157:1565f38ca44b 353 {
WiredHome 157:1565f38ca44b 354 return &tpMatrix;
WiredHome 157:1565f38ca44b 355 }
WiredHome 157:1565f38ca44b 356
WiredHome 157:1565f38ca44b 357
WiredHome 83:7bad0068cca0 358 static void InsertionSort(int * buf, int bufsize)
WiredHome 83:7bad0068cca0 359 {
WiredHome 83:7bad0068cca0 360 int i, j;
WiredHome 83:7bad0068cca0 361 int temp;
WiredHome 124:1690a7ae871c 362
WiredHome 108:7415c405ee08 363 for(i = 1; i < bufsize; i++) {
WiredHome 83:7bad0068cca0 364 temp = buf[i];
WiredHome 83:7bad0068cca0 365 j = i;
WiredHome 83:7bad0068cca0 366 while( j && (buf[j-1] > temp) ) {
WiredHome 83:7bad0068cca0 367 buf[j] = buf[j-1];
WiredHome 83:7bad0068cca0 368 j = j-1;
WiredHome 83:7bad0068cca0 369 }
WiredHome 83:7bad0068cca0 370 buf[j] = temp;
WiredHome 83:7bad0068cca0 371 } // End of sort
WiredHome 83:7bad0068cca0 372 }
WiredHome 83:7bad0068cca0 373
WiredHome 83:7bad0068cca0 374
WiredHome 83:7bad0068cca0 375 void RA8875::_TouchTicker(void)
WiredHome 78:faf49c381591 376 {
WiredHome 197:853d08e2fb53 377 //INFO("_TouchTicker()");
WiredHome 165:695c24cc5197 378 if (timeSinceTouch.read_us() > NOTOUCH_TIMEOUT_uS) {
WiredHome 83:7bad0068cca0 379 touchSample = 0;
WiredHome 193:74f80834d59d 380 if (touchState == held) {
WiredHome 83:7bad0068cca0 381 touchState = release;
WiredHome 193:74f80834d59d 382 INFO("release %d", touchState);
WiredHome 193:74f80834d59d 383 } else {
WiredHome 193:74f80834d59d 384 INFO("!= held %d", touchState);
WiredHome 83:7bad0068cca0 385 touchState = no_touch;
WiredHome 193:74f80834d59d 386 }
WiredHome 165:695c24cc5197 387 timeSinceTouch.reset();
WiredHome 83:7bad0068cca0 388 }
WiredHome 83:7bad0068cca0 389 }
WiredHome 83:7bad0068cca0 390
WiredHome 198:9b6851107426 391
WiredHome 198:9b6851107426 392 // Description: Given a valid set of calibration factors and a point
WiredHome 198:9b6851107426 393 // value reported by the touch screen, this function
WiredHome 198:9b6851107426 394 // calculates and returns the true (or closest to true)
WiredHome 198:9b6851107426 395 // display point below the spot where the touch screen
WiredHome 198:9b6851107426 396 // was touched.
WiredHome 198:9b6851107426 397 //
WiredHome 198:9b6851107426 398 // Argument(s): displayPtr (output) - Pointer to the calculated
WiredHome 198:9b6851107426 399 // (true) display point.
WiredHome 198:9b6851107426 400 // screenPtr (input) - Pointer to the reported touch
WiredHome 198:9b6851107426 401 // screen point.
WiredHome 198:9b6851107426 402 // matrixPtr (input) - Pointer to calibration factors
WiredHome 198:9b6851107426 403 // matrix previously calculated
WiredHome 198:9b6851107426 404 // from a call to
WiredHome 198:9b6851107426 405 // setCalibrationMatrix()
WiredHome 198:9b6851107426 406 //
WiredHome 198:9b6851107426 407 // The function simply solves for Xd and Yd by implementing the
WiredHome 198:9b6851107426 408 // computations required by the translation matrix.
WiredHome 198:9b6851107426 409 //
WiredHome 198:9b6851107426 410 // /- -\ //
WiredHome 198:9b6851107426 411 // /- -\ /- -\ | | //
WiredHome 198:9b6851107426 412 // | | | | | Xs | //
WiredHome 198:9b6851107426 413 // | Xd | | A B C | | | //
WiredHome 198:9b6851107426 414 // | | = | | * | Ys | //
WiredHome 198:9b6851107426 415 // | Yd | | D E F | | | //
WiredHome 198:9b6851107426 416 // | | | | | 1 | //
WiredHome 198:9b6851107426 417 // \- -/ \- -/ | | //
WiredHome 198:9b6851107426 418 // \- -/ //
WiredHome 198:9b6851107426 419 //
WiredHome 198:9b6851107426 420 // It must be kept brief to avoid consuming CPU cycles.
WiredHome 198:9b6851107426 421 //
WiredHome 198:9b6851107426 422 // Return: OK - the display point was correctly calculated
WiredHome 198:9b6851107426 423 // and its value is in the output argument.
WiredHome 198:9b6851107426 424 // NOT_OK - an error was detected and the function
WiredHome 198:9b6851107426 425 // failed to return a valid point.
WiredHome 198:9b6851107426 426 //
WiredHome 198:9b6851107426 427 // NOTE! NOTE! NOTE!
WiredHome 198:9b6851107426 428 //
WiredHome 198:9b6851107426 429 // setCalibrationMatrix() and getDisplayPoint() will do fine
WiredHome 198:9b6851107426 430 // for you as they are, provided that your digitizer
WiredHome 198:9b6851107426 431 // resolution does not exceed 10 bits (1024 values). Higher
WiredHome 198:9b6851107426 432 // resolutions may cause the integer operations to overflow
WiredHome 198:9b6851107426 433 // and return incorrect values. If you wish to use these
WiredHome 198:9b6851107426 434 // functions with digitizer resolutions of 12 bits (4096
WiredHome 198:9b6851107426 435 // values) you will either have to a) use 64-bit signed
WiredHome 198:9b6851107426 436 // integer variables and math, or b) judiciously modify the
WiredHome 198:9b6851107426 437 // operations to scale results by a factor of 2 or even 4.
WiredHome 198:9b6851107426 438 //
WiredHome 198:9b6851107426 439 void RA8875::ReadResistive() {
WiredHome 198:9b6851107426 440 TouchCode_t ts = no_touch;
WiredHome 198:9b6851107426 441 int a2dX = 0;
WiredHome 198:9b6851107426 442 int a2dY = 0;
WiredHome 198:9b6851107426 443
WiredHome 198:9b6851107426 444 touchInfo[0].touchID = 0;
WiredHome 198:9b6851107426 445 ts = TouchPanelA2DFiltered(&a2dX, &a2dY);
WiredHome 198:9b6851107426 446 if (ts != no_touch) {
WiredHome 198:9b6851107426 447 panelTouched = true;
WiredHome 198:9b6851107426 448 numberOfTouchPoints = 1;
WiredHome 198:9b6851107426 449
WiredHome 198:9b6851107426 450 if (tpMatrix.Divider != 0) {
WiredHome 198:9b6851107426 451 /* Operation order is important since we are doing integer */
WiredHome 198:9b6851107426 452 /* math. Make sure you add all terms together before */
WiredHome 198:9b6851107426 453 /* dividing, so that the remainder is not rounded off */
WiredHome 198:9b6851107426 454 /* prematurely. */
WiredHome 202:a22cbc04f332 455 touchInfo[0].coordinates = TranslateOrientation(
WiredHome 202:a22cbc04f332 456 ((tpMatrix.An * a2dX) + (tpMatrix.Bn * a2dY) + tpMatrix.Cn) / tpMatrix.Divider,
WiredHome 202:a22cbc04f332 457 ((tpMatrix.Dn * a2dX) + (tpMatrix.En * a2dY) + tpMatrix.Fn) / tpMatrix.Divider );
WiredHome 198:9b6851107426 458 } else {
WiredHome 198:9b6851107426 459 ts = no_cal;
WiredHome 198:9b6851107426 460 }
WiredHome 198:9b6851107426 461 } else {
WiredHome 198:9b6851107426 462 numberOfTouchPoints = 0;
WiredHome 198:9b6851107426 463 }
WiredHome 198:9b6851107426 464 touchInfo[0].touchCode = ts;
WiredHome 198:9b6851107426 465 }
WiredHome 198:9b6851107426 466
WiredHome 198:9b6851107426 467
WiredHome 83:7bad0068cca0 468 TouchCode_t RA8875::TouchPanelA2DRaw(int *x, int *y)
WiredHome 83:7bad0068cca0 469 {
WiredHome 154:ad2450fc3dc3 470 INFO("A2Raw");
WiredHome 193:74f80834d59d 471 if( (ReadCommand(RA8875_INTC2) & RA8875_INT_TP) ) { // Test for TP Interrupt pending in register RA8875_INTC2
WiredHome 154:ad2450fc3dc3 472 INFO("Int pending");
WiredHome 165:695c24cc5197 473 timeSinceTouch.reset();
WiredHome 193:74f80834d59d 474 *y = ReadCommand(RA8875_TPYH) << 2 | ( (ReadCommand(RA8875_TPXYL) & 0xC) >> 2 ); // D[9:2] from reg RA8875_TPYH, D[1:0] from reg RA8875_TPXYL[3:2]
WiredHome 193:74f80834d59d 475 *x = ReadCommand(RA8875_TPXH) << 2 | ( (ReadCommand(RA8875_TPXYL) & 0x3) ); // D[9:2] from reg RA8875_TPXH, D[1:0] from reg RA8875_TPXYL[1:0]
WiredHome 193:74f80834d59d 476 INFO("(x,y) = (%d,%d)", *x, *y);
WiredHome 193:74f80834d59d 477 WriteCommand(RA8875_INTC2, RA8875_INT_TP); // reg RA8875_INTC2: Clear that TP interrupt flag
WiredHome 83:7bad0068cca0 478 touchState = touch;
WiredHome 193:74f80834d59d 479 } else if (ReadCommand(RA8875_TPXYL) & RA8875_TPXYL_ADET) {
WiredHome 193:74f80834d59d 480 INFO("held");
WiredHome 193:74f80834d59d 481 touchState = held;
WiredHome 83:7bad0068cca0 482 } else {
WiredHome 154:ad2450fc3dc3 483 INFO("no touch");
WiredHome 83:7bad0068cca0 484 touchState = no_touch;
WiredHome 83:7bad0068cca0 485 }
WiredHome 83:7bad0068cca0 486 return touchState;
WiredHome 83:7bad0068cca0 487 }
WiredHome 83:7bad0068cca0 488
WiredHome 83:7bad0068cca0 489 TouchCode_t RA8875::TouchPanelA2DFiltered(int *x, int *y)
WiredHome 83:7bad0068cca0 490 {
WiredHome 83:7bad0068cca0 491 static int xbuf[TPBUFSIZE], ybuf[TPBUFSIZE];
WiredHome 83:7bad0068cca0 492 static int lastX, lastY;
WiredHome 83:7bad0068cca0 493 int i, j;
WiredHome 83:7bad0068cca0 494 TouchCode_t ret = touchState;
WiredHome 78:faf49c381591 495
WiredHome 193:74f80834d59d 496 if ( (ReadCommand(RA8875_INTC2) & RA8875_INT_TP) ) { // Test for TP Interrupt pending in register RA8875_INTC2
WiredHome 165:695c24cc5197 497 timeSinceTouch.reset();
WiredHome 78:faf49c381591 498 // Get the next data samples
WiredHome 193:74f80834d59d 499 ybuf[touchSample] = ReadCommand(RA8875_TPYH) << 2 | ( (ReadCommand(RA8875_TPXYL) & 0xC) >> 2 ); // D[9:2] from reg RA8875_TPYH, D[1:0] from reg RA8875_TPXYL[3:2]
WiredHome 193:74f80834d59d 500 xbuf[touchSample] = ReadCommand(RA8875_TPXH) << 2 | ( (ReadCommand(RA8875_TPXYL) & 0x3) ); // D[9:2] from reg RA8875_TPXH, D[1:0] from reg RA8875_TPXYL[1:0]
WiredHome 78:faf49c381591 501 // Check for a complete set
WiredHome 197:853d08e2fb53 502 if (++touchSample == TPBUFSIZE) {
WiredHome 78:faf49c381591 503 // Buffers are full, so process them using Finn's method described in Analog Dialogue No. 44, Feb 2010
WiredHome 78:faf49c381591 504 // This requires sorting the samples in order of size, then discarding the top 25% and
WiredHome 78:faf49c381591 505 // bottom 25% as noise spikes. Finally, the middle 50% of the values are averaged to
WiredHome 78:faf49c381591 506 // reduce Gaussian noise.
WiredHome 83:7bad0068cca0 507 InsertionSort(ybuf, TPBUFSIZE);
WiredHome 83:7bad0068cca0 508 InsertionSort(xbuf, TPBUFSIZE);
WiredHome 78:faf49c381591 509 // Average the middle half of the Y values and report them
WiredHome 78:faf49c381591 510 j = 0;
WiredHome 197:853d08e2fb53 511 for (i = (TPBUFSIZE/4) - 1; i < TPBUFSIZE - TPBUFSIZE/4; i++ ) {
WiredHome 78:faf49c381591 512 j += ybuf[i];
WiredHome 78:faf49c381591 513 }
WiredHome 83:7bad0068cca0 514 *y = lastY = j * (float)2/TPBUFSIZE; // This is the average
WiredHome 78:faf49c381591 515 // Average the middle half of the X values and report them
WiredHome 78:faf49c381591 516 j = 0;
WiredHome 78:faf49c381591 517 for(i = (TPBUFSIZE/4) - 1; i < TPBUFSIZE - TPBUFSIZE/4; i++ ) {
WiredHome 78:faf49c381591 518 j += xbuf[i];
WiredHome 78:faf49c381591 519 }
WiredHome 83:7bad0068cca0 520 *x = lastX = j * (float)2/TPBUFSIZE; // This is the average
WiredHome 78:faf49c381591 521 // Tidy up and return
WiredHome 193:74f80834d59d 522 if (touchState == touch || touchState == held) {
WiredHome 83:7bad0068cca0 523 touchState = held;
WiredHome 197:853d08e2fb53 524 //INFO("held");
WiredHome 193:74f80834d59d 525 } else {
WiredHome 83:7bad0068cca0 526 touchState = touch;
WiredHome 197:853d08e2fb53 527 //INFO("touch");
WiredHome 193:74f80834d59d 528 }
WiredHome 83:7bad0068cca0 529 ret = touchState;
WiredHome 83:7bad0068cca0 530 touchSample = 0; // Ready to start on the next set of data samples
WiredHome 78:faf49c381591 531 } else {
WiredHome 78:faf49c381591 532 // Buffer not yet full, so do not return any results yet
WiredHome 83:7bad0068cca0 533 if (touchState == touch || touchState == held) {
WiredHome 83:7bad0068cca0 534 *x = lastX;
WiredHome 83:7bad0068cca0 535 *y = lastY;
WiredHome 197:853d08e2fb53 536 #ifdef DEBUG
WiredHome 193:74f80834d59d 537 {
WiredHome 193:74f80834d59d 538 static TouchCode_t lastTC = no_touch;
WiredHome 193:74f80834d59d 539 if (lastTC != touchState)
WiredHome 197:853d08e2fb53 540 //INFO("held");
WiredHome 193:74f80834d59d 541 lastTC = touchState;
WiredHome 193:74f80834d59d 542 }
WiredHome 197:853d08e2fb53 543 #endif
WiredHome 83:7bad0068cca0 544 ret = touchState = held;
WiredHome 193:74f80834d59d 545 } else {
WiredHome 193:74f80834d59d 546 INFO("else %d, %d", touchState, touchSample);
WiredHome 83:7bad0068cca0 547 }
WiredHome 78:faf49c381591 548 }
WiredHome 193:74f80834d59d 549 WriteCommand(RA8875_INTC2, RA8875_INT_TP); // reg RA8875_INTC2: Clear that TP interrupt flag
WiredHome 193:74f80834d59d 550 } else if (0 == (ReadCommand(RA8875_TPXYL) & RA8875_TPXYL_ADET)) {
WiredHome 193:74f80834d59d 551 INFO("held");
WiredHome 193:74f80834d59d 552 *x = lastX;
WiredHome 193:74f80834d59d 553 *y = lastY;
WiredHome 193:74f80834d59d 554 ret = touchState = held;
WiredHome 193:74f80834d59d 555 } else if (timeSinceTouch.read_ms() < 20) {
WiredHome 193:74f80834d59d 556 *x = lastX;
WiredHome 193:74f80834d59d 557 *y = lastY;
WiredHome 193:74f80834d59d 558 //ret = touchState;
WiredHome 193:74f80834d59d 559 } else {
WiredHome 193:74f80834d59d 560 //INFO("touchState %d", touchState);
WiredHome 193:74f80834d59d 561 //touchSample = 0;
WiredHome 193:74f80834d59d 562 *x = lastX;
WiredHome 193:74f80834d59d 563 *y = lastY;
WiredHome 193:74f80834d59d 564 if (touchState == no_touch || touchState == release) {
WiredHome 193:74f80834d59d 565 ret = touchState = no_touch;
WiredHome 193:74f80834d59d 566 } else {
WiredHome 193:74f80834d59d 567 INFO("release");
WiredHome 193:74f80834d59d 568 touchSample = 0;
WiredHome 193:74f80834d59d 569 touchState = no_touch;
WiredHome 193:74f80834d59d 570 ret = release;
WiredHome 193:74f80834d59d 571 }
WiredHome 193:74f80834d59d 572 #if 0
WiredHome 83:7bad0068cca0 573 if (touchState == touch || touchState == held) {
WiredHome 83:7bad0068cca0 574 *x = lastX;
WiredHome 83:7bad0068cca0 575 *y = lastY;
WiredHome 83:7bad0068cca0 576 ret = touchState = held;
WiredHome 193:74f80834d59d 577 INFO("held");
WiredHome 83:7bad0068cca0 578 } else if (touchState == release) {
WiredHome 83:7bad0068cca0 579 *x = lastX;
WiredHome 83:7bad0068cca0 580 *y = lastY;
WiredHome 83:7bad0068cca0 581 ret = release;
WiredHome 83:7bad0068cca0 582 touchState = no_touch;
WiredHome 193:74f80834d59d 583 INFO("release");
WiredHome 83:7bad0068cca0 584 }
WiredHome 193:74f80834d59d 585 #endif
WiredHome 83:7bad0068cca0 586 }
WiredHome 83:7bad0068cca0 587 return ret;
WiredHome 78:faf49c381591 588 }
WiredHome 78:faf49c381591 589
WiredHome 167:8aa3fb2a5a31 590 /// The following section is derived from Carlos E. Vidales.
WiredHome 167:8aa3fb2a5a31 591 ///
WiredHome 167:8aa3fb2a5a31 592 /// @copyright &copy; 2001, Carlos E. Vidales. All rights reserved.
WiredHome 167:8aa3fb2a5a31 593 ///
WiredHome 167:8aa3fb2a5a31 594 /// This sample program was written and put in the public domain
WiredHome 167:8aa3fb2a5a31 595 /// by Carlos E. Vidales. The program is provided "as is"
WiredHome 167:8aa3fb2a5a31 596 /// without warranty of any kind, either expressed or implied.
WiredHome 167:8aa3fb2a5a31 597 /// If you choose to use the program within your own products
WiredHome 167:8aa3fb2a5a31 598 /// you do so at your own risk, and assume the responsibility
WiredHome 167:8aa3fb2a5a31 599 /// for servicing, repairing or correcting the program should
WiredHome 167:8aa3fb2a5a31 600 /// it prove defective in any manner.
WiredHome 167:8aa3fb2a5a31 601 /// You may copy and distribute the program's source code in any
WiredHome 167:8aa3fb2a5a31 602 /// medium, provided that you also include in each copy an
WiredHome 167:8aa3fb2a5a31 603 /// appropriate copyright notice and disclaimer of warranty.
WiredHome 167:8aa3fb2a5a31 604 /// You may also modify this program and distribute copies of
WiredHome 167:8aa3fb2a5a31 605 /// it provided that you include prominent notices stating
WiredHome 167:8aa3fb2a5a31 606 /// that you changed the file(s) and the date of any change,
WiredHome 167:8aa3fb2a5a31 607 /// and that you do not charge any royalties or licenses for
WiredHome 167:8aa3fb2a5a31 608 /// its use.
WiredHome 167:8aa3fb2a5a31 609 ///
WiredHome 167:8aa3fb2a5a31 610 /// This file contains functions that implement calculations
WiredHome 167:8aa3fb2a5a31 611 /// necessary to obtain calibration factors for a touch screen
WiredHome 167:8aa3fb2a5a31 612 /// that suffers from multiple distortion effects: namely,
WiredHome 167:8aa3fb2a5a31 613 /// translation, scaling and rotation.
WiredHome 167:8aa3fb2a5a31 614 ///
WiredHome 167:8aa3fb2a5a31 615 /// The following set of equations represent a valid display
WiredHome 167:8aa3fb2a5a31 616 /// point given a corresponding set of touch screen points:
WiredHome 167:8aa3fb2a5a31 617 ///
WiredHome 167:8aa3fb2a5a31 618 /// <pre>
WiredHome 190:3132b7dfad82 619 /// /- -\ //
WiredHome 190:3132b7dfad82 620 /// /- -\ /- -\ | | //
WiredHome 190:3132b7dfad82 621 /// | | | | | Xs | //
WiredHome 190:3132b7dfad82 622 /// | Xd | | A B C | | | //
WiredHome 190:3132b7dfad82 623 /// | | = | | * | Ys | //
WiredHome 190:3132b7dfad82 624 /// | Yd | | D E F | | | //
WiredHome 190:3132b7dfad82 625 /// | | | | | 1 | //
WiredHome 190:3132b7dfad82 626 /// \- -/ \- -/ | | //
WiredHome 190:3132b7dfad82 627 /// \- -/ //
WiredHome 167:8aa3fb2a5a31 628 /// where:
WiredHome 167:8aa3fb2a5a31 629 /// (Xd,Yd) represents the desired display point
WiredHome 167:8aa3fb2a5a31 630 /// coordinates,
WiredHome 167:8aa3fb2a5a31 631 /// (Xs,Ys) represents the available touch screen
WiredHome 167:8aa3fb2a5a31 632 /// coordinates, and the matrix
WiredHome 190:3132b7dfad82 633 /// /- -\ represents the factors used to translate
WiredHome 190:3132b7dfad82 634 /// |A,B,C| the available touch screen point values
WiredHome 190:3132b7dfad82 635 /// |D,E,F| into the corresponding display
WiredHome 190:3132b7dfad82 636 /// \- -/ coordinates.
WiredHome 190:3132b7dfad82 637 ///
WiredHome 167:8aa3fb2a5a31 638 /// Note that for practical considerations, the utilities
WiredHome 167:8aa3fb2a5a31 639 /// within this file do not use the matrix coefficients as
WiredHome 167:8aa3fb2a5a31 640 /// defined above, but instead use the following
WiredHome 167:8aa3fb2a5a31 641 /// equivalents, since floating point math is not used:
WiredHome 167:8aa3fb2a5a31 642 /// A = An/Divider
WiredHome 167:8aa3fb2a5a31 643 /// B = Bn/Divider
WiredHome 167:8aa3fb2a5a31 644 /// C = Cn/Divider
WiredHome 167:8aa3fb2a5a31 645 /// D = Dn/Divider
WiredHome 167:8aa3fb2a5a31 646 /// E = En/Divider
WiredHome 167:8aa3fb2a5a31 647 /// F = Fn/Divider
WiredHome 167:8aa3fb2a5a31 648 /// The functions provided within this file are:
WiredHome 167:8aa3fb2a5a31 649 /// setCalibrationMatrix() - calculates the set of factors
WiredHome 167:8aa3fb2a5a31 650 /// in the above equation, given
WiredHome 167:8aa3fb2a5a31 651 /// three sets of test points.
WiredHome 167:8aa3fb2a5a31 652 /// getDisplayPoint() - returns the actual display
WiredHome 167:8aa3fb2a5a31 653 /// coordinates, given a set of
WiredHome 167:8aa3fb2a5a31 654 /// touch screen coordinates.
WiredHome 167:8aa3fb2a5a31 655 /// translateRawScreenCoordinates() - helper function to transform
WiredHome 167:8aa3fb2a5a31 656 /// raw screen points into values
WiredHome 167:8aa3fb2a5a31 657 /// scaled to the desired display
WiredHome 167:8aa3fb2a5a31 658 /// resolution.
WiredHome 167:8aa3fb2a5a31 659 ///
WiredHome 167:8aa3fb2a5a31 660 ///
WiredHome 167:8aa3fb2a5a31 661 /// Function: setCalibrationMatrix()
WiredHome 167:8aa3fb2a5a31 662 ///
WiredHome 167:8aa3fb2a5a31 663 /// Description: Calling this function with valid input data
WiredHome 167:8aa3fb2a5a31 664 /// in the display and screen input arguments
WiredHome 167:8aa3fb2a5a31 665 /// causes the calibration factors between the
WiredHome 167:8aa3fb2a5a31 666 /// screen and display points to be calculated,
WiredHome 167:8aa3fb2a5a31 667 /// and the output argument - matrixPtr - to be
WiredHome 167:8aa3fb2a5a31 668 /// populated.
WiredHome 167:8aa3fb2a5a31 669 ///
WiredHome 167:8aa3fb2a5a31 670 /// This function needs to be called only when new
WiredHome 167:8aa3fb2a5a31 671 /// calibration factors are desired.
WiredHome 167:8aa3fb2a5a31 672 ///
WiredHome 167:8aa3fb2a5a31 673 ///
WiredHome 167:8aa3fb2a5a31 674 /// Argument(s): displayPtr (input) - Pointer to an array of three
WiredHome 167:8aa3fb2a5a31 675 /// sample, reference points.
WiredHome 167:8aa3fb2a5a31 676 /// screenPtr (input) - Pointer to the array of touch
WiredHome 167:8aa3fb2a5a31 677 /// screen points corresponding
WiredHome 167:8aa3fb2a5a31 678 /// to the reference display points.
WiredHome 167:8aa3fb2a5a31 679 /// matrixPtr (output) - Pointer to the calibration
WiredHome 167:8aa3fb2a5a31 680 /// matrix computed for the set
WiredHome 167:8aa3fb2a5a31 681 /// of points being provided.
WiredHome 167:8aa3fb2a5a31 682 ///
WiredHome 167:8aa3fb2a5a31 683 ///
WiredHome 167:8aa3fb2a5a31 684 /// From the article text, recall that the matrix coefficients are
WiredHome 167:8aa3fb2a5a31 685 /// resolved to be the following:
WiredHome 167:8aa3fb2a5a31 686 ///
WiredHome 167:8aa3fb2a5a31 687 ///
WiredHome 167:8aa3fb2a5a31 688 /// Divider = (Xs0 - Xs2)*(Ys1 - Ys2) - (Xs1 - Xs2)*(Ys0 - Ys2)
WiredHome 167:8aa3fb2a5a31 689 ///
WiredHome 167:8aa3fb2a5a31 690 ///
WiredHome 167:8aa3fb2a5a31 691 ///
WiredHome 167:8aa3fb2a5a31 692 /// (Xd0 - Xd2)*(Ys1 - Ys2) - (Xd1 - Xd2)*(Ys0 - Ys2)
WiredHome 167:8aa3fb2a5a31 693 /// A = ---------------------------------------------------
WiredHome 167:8aa3fb2a5a31 694 /// Divider
WiredHome 167:8aa3fb2a5a31 695 ///
WiredHome 167:8aa3fb2a5a31 696 ///
WiredHome 167:8aa3fb2a5a31 697 /// (Xs0 - Xs2)*(Xd1 - Xd2) - (Xd0 - Xd2)*(Xs1 - Xs2)
WiredHome 167:8aa3fb2a5a31 698 /// B = ---------------------------------------------------
WiredHome 167:8aa3fb2a5a31 699 /// Divider
WiredHome 167:8aa3fb2a5a31 700 ///
WiredHome 167:8aa3fb2a5a31 701 ///
WiredHome 167:8aa3fb2a5a31 702 /// Ys0*(Xs2*Xd1 - Xs1*Xd2) +
WiredHome 167:8aa3fb2a5a31 703 /// Ys1*(Xs0*Xd2 - Xs2*Xd0) +
WiredHome 167:8aa3fb2a5a31 704 /// Ys2*(Xs1*Xd0 - Xs0*Xd1)
WiredHome 167:8aa3fb2a5a31 705 /// C = ---------------------------------------------------
WiredHome 167:8aa3fb2a5a31 706 /// Divider
WiredHome 167:8aa3fb2a5a31 707 ///
WiredHome 167:8aa3fb2a5a31 708 ///
WiredHome 167:8aa3fb2a5a31 709 /// (Yd0 - Yd2)*(Ys1 - Ys2) - (Yd1 - Yd2)*(Ys0 - Ys2)
WiredHome 167:8aa3fb2a5a31 710 /// D = ---------------------------------------------------
WiredHome 167:8aa3fb2a5a31 711 /// Divider
WiredHome 167:8aa3fb2a5a31 712 ///
WiredHome 167:8aa3fb2a5a31 713 ///
WiredHome 167:8aa3fb2a5a31 714 /// (Xs0 - Xs2)*(Yd1 - Yd2) - (Yd0 - Yd2)*(Xs1 - Xs2)
WiredHome 167:8aa3fb2a5a31 715 /// E = ---------------------------------------------------
WiredHome 167:8aa3fb2a5a31 716 /// Divider
WiredHome 167:8aa3fb2a5a31 717 ///
WiredHome 167:8aa3fb2a5a31 718 ///
WiredHome 167:8aa3fb2a5a31 719 /// Ys0*(Xs2*Yd1 - Xs1*Yd2) +
WiredHome 167:8aa3fb2a5a31 720 /// Ys1*(Xs0*Yd2 - Xs2*Yd0) +
WiredHome 167:8aa3fb2a5a31 721 /// Ys2*(Xs1*Yd0 - Xs0*Yd1)
WiredHome 167:8aa3fb2a5a31 722 /// F = ---------------------------------------------------
WiredHome 167:8aa3fb2a5a31 723 /// Divider
WiredHome 167:8aa3fb2a5a31 724 ///
WiredHome 167:8aa3fb2a5a31 725 ///
WiredHome 167:8aa3fb2a5a31 726 /// Return: OK - the calibration matrix was correctly
WiredHome 167:8aa3fb2a5a31 727 /// calculated and its value is in the
WiredHome 167:8aa3fb2a5a31 728 /// output argument.
WiredHome 167:8aa3fb2a5a31 729 /// NOT_OK - an error was detected and the
WiredHome 167:8aa3fb2a5a31 730 /// function failed to return a valid
WiredHome 167:8aa3fb2a5a31 731 /// set of matrix values.
WiredHome 167:8aa3fb2a5a31 732 /// The only time this sample code returns
WiredHome 167:8aa3fb2a5a31 733 /// NOT_OK is when Divider == 0
WiredHome 167:8aa3fb2a5a31 734 ///
WiredHome 167:8aa3fb2a5a31 735 ///
WiredHome 167:8aa3fb2a5a31 736 ///
WiredHome 167:8aa3fb2a5a31 737 /// NOTE! NOTE! NOTE!
WiredHome 167:8aa3fb2a5a31 738 ///
WiredHome 167:8aa3fb2a5a31 739 /// setCalibrationMatrix() and getDisplayPoint() will do fine
WiredHome 167:8aa3fb2a5a31 740 /// for you as they are, provided that your digitizer
WiredHome 167:8aa3fb2a5a31 741 /// resolution does not exceed 10 bits (1024 values). Higher
WiredHome 167:8aa3fb2a5a31 742 /// resolutions may cause the integer operations to overflow
WiredHome 167:8aa3fb2a5a31 743 /// and return incorrect values. If you wish to use these
WiredHome 167:8aa3fb2a5a31 744 /// functions with digitizer resolutions of 12 bits (4096
WiredHome 167:8aa3fb2a5a31 745 /// values) you will either have to a) use 64-bit signed
WiredHome 167:8aa3fb2a5a31 746 /// integer variables and math, or b) judiciously modify the
WiredHome 167:8aa3fb2a5a31 747 /// operations to scale results by a factor of 2 or even 4.
WiredHome 167:8aa3fb2a5a31 748 ///
WiredHome 167:8aa3fb2a5a31 749 /// </pre>
WiredHome 167:8aa3fb2a5a31 750 ///
WiredHome 81:01da2e34283d 751 RetCode_t RA8875::TouchPanelComputeCalibration(point_t * displayPtr, point_t * screenPtr, tpMatrix_t * matrixPtr)
WiredHome 78:faf49c381591 752 {
WiredHome 78:faf49c381591 753 RetCode_t retValue = noerror;
WiredHome 78:faf49c381591 754
WiredHome 78:faf49c381591 755 tpMatrix.Divider = ((screenPtr[0].x - screenPtr[2].x) * (screenPtr[1].y - screenPtr[2].y)) -
WiredHome 78:faf49c381591 756 ((screenPtr[1].x - screenPtr[2].x) * (screenPtr[0].y - screenPtr[2].y)) ;
WiredHome 78:faf49c381591 757
WiredHome 78:faf49c381591 758 if( tpMatrix.Divider == 0 ) {
WiredHome 78:faf49c381591 759 retValue = bad_parameter;
WiredHome 78:faf49c381591 760 } else {
WiredHome 78:faf49c381591 761 tpMatrix.An = ((displayPtr[0].x - displayPtr[2].x) * (screenPtr[1].y - screenPtr[2].y)) -
WiredHome 78:faf49c381591 762 ((displayPtr[1].x - displayPtr[2].x) * (screenPtr[0].y - screenPtr[2].y)) ;
WiredHome 78:faf49c381591 763
WiredHome 78:faf49c381591 764 tpMatrix.Bn = ((screenPtr[0].x - screenPtr[2].x) * (displayPtr[1].x - displayPtr[2].x)) -
WiredHome 78:faf49c381591 765 ((displayPtr[0].x - displayPtr[2].x) * (screenPtr[1].x - screenPtr[2].x)) ;
WiredHome 78:faf49c381591 766
WiredHome 78:faf49c381591 767 tpMatrix.Cn = (screenPtr[2].x * displayPtr[1].x - screenPtr[1].x * displayPtr[2].x) * screenPtr[0].y +
WiredHome 78:faf49c381591 768 (screenPtr[0].x * displayPtr[2].x - screenPtr[2].x * displayPtr[0].x) * screenPtr[1].y +
WiredHome 78:faf49c381591 769 (screenPtr[1].x * displayPtr[0].x - screenPtr[0].x * displayPtr[1].x) * screenPtr[2].y ;
WiredHome 78:faf49c381591 770
WiredHome 78:faf49c381591 771 tpMatrix.Dn = ((displayPtr[0].y - displayPtr[2].y) * (screenPtr[1].y - screenPtr[2].y)) -
WiredHome 78:faf49c381591 772 ((displayPtr[1].y - displayPtr[2].y) * (screenPtr[0].y - screenPtr[2].y)) ;
WiredHome 78:faf49c381591 773
WiredHome 78:faf49c381591 774 tpMatrix.En = ((screenPtr[0].x - screenPtr[2].x) * (displayPtr[1].y - displayPtr[2].y)) -
WiredHome 78:faf49c381591 775 ((displayPtr[0].y - displayPtr[2].y) * (screenPtr[1].x - screenPtr[2].x)) ;
WiredHome 78:faf49c381591 776
WiredHome 78:faf49c381591 777 tpMatrix.Fn = (screenPtr[2].x * displayPtr[1].y - screenPtr[1].x * displayPtr[2].y) * screenPtr[0].y +
WiredHome 78:faf49c381591 778 (screenPtr[0].x * displayPtr[2].y - screenPtr[2].x * displayPtr[0].y) * screenPtr[1].y +
WiredHome 78:faf49c381591 779 (screenPtr[1].x * displayPtr[0].y - screenPtr[0].x * displayPtr[1].y) * screenPtr[2].y ;
WiredHome 83:7bad0068cca0 780 touchState = no_touch;
WiredHome 78:faf49c381591 781 if (matrixPtr)
WiredHome 78:faf49c381591 782 memcpy(matrixPtr, &tpMatrix, sizeof(tpMatrix_t));
WiredHome 78:faf49c381591 783 }
WiredHome 78:faf49c381591 784 return( retValue ) ;
WiredHome 78:faf49c381591 785 }
WiredHome 78:faf49c381591 786
WiredHome 157:1565f38ca44b 787 void RA8875::ResTouchPanelCfg(const char * _tpFQFN, const char * _tpCalMessage)
WiredHome 157:1565f38ca44b 788 {
WiredHome 157:1565f38ca44b 789 tpFQFN = _tpFQFN;
WiredHome 157:1565f38ca44b 790 tpCalMessage = _tpCalMessage;
WiredHome 157:1565f38ca44b 791 }
WiredHome 157:1565f38ca44b 792
WiredHome 157:1565f38ca44b 793
WiredHome 157:1565f38ca44b 794 RetCode_t RA8875::_internal_ts_cal()
WiredHome 157:1565f38ca44b 795 {
WiredHome 157:1565f38ca44b 796 FILE * fh;
WiredHome 157:1565f38ca44b 797 tpMatrix_t matrix;
WiredHome 157:1565f38ca44b 798 RetCode_t r = noerror;
WiredHome 190:3132b7dfad82 799
WiredHome 157:1565f38ca44b 800 if (tpFQFN) {
WiredHome 157:1565f38ca44b 801 fh = fopen(tpFQFN, "rb");
WiredHome 157:1565f38ca44b 802 if (fh) {
WiredHome 157:1565f38ca44b 803 fread(&matrix, sizeof(tpMatrix_t), 1, fh);
WiredHome 157:1565f38ca44b 804 fclose(fh);
WiredHome 157:1565f38ca44b 805 TouchPanelSetMatrix(&matrix);
WiredHome 157:1565f38ca44b 806 } else {
WiredHome 157:1565f38ca44b 807 r = TouchPanelCalibrate(tpCalMessage, &matrix);
WiredHome 157:1565f38ca44b 808 if (r == noerror) {
WiredHome 157:1565f38ca44b 809 fh = fopen(tpFQFN, "wb");
WiredHome 157:1565f38ca44b 810 if (fh) {
WiredHome 157:1565f38ca44b 811 fwrite(&matrix, sizeof(tpMatrix_t), 1, fh);
WiredHome 157:1565f38ca44b 812 fclose(fh);
WiredHome 157:1565f38ca44b 813 INFO(" tp cal written to '%s'.", tpFQFN);
WiredHome 157:1565f38ca44b 814 } else {
WiredHome 157:1565f38ca44b 815 ERR(" couldn't open tpcal file '%s'.", tpFQFN);
WiredHome 157:1565f38ca44b 816 r = file_not_found;
WiredHome 157:1565f38ca44b 817 }
WiredHome 157:1565f38ca44b 818 } else {
WiredHome 157:1565f38ca44b 819 ERR("error return: %d", r);
WiredHome 157:1565f38ca44b 820 }
WiredHome 157:1565f38ca44b 821 HexDump("TPCal", (const uint8_t *)&matrix, sizeof(tpMatrix_t));
WiredHome 157:1565f38ca44b 822 cls();
WiredHome 157:1565f38ca44b 823 }
WiredHome 157:1565f38ca44b 824 }
WiredHome 157:1565f38ca44b 825 return r;
WiredHome 157:1565f38ca44b 826 }
WiredHome 157:1565f38ca44b 827
WiredHome 157:1565f38ca44b 828
WiredHome 157:1565f38ca44b 829
WiredHome 124:1690a7ae871c 830 ////////////////// Capacitive Touch Panel
WiredHome 124:1690a7ae871c 831
WiredHome 165:695c24cc5197 832 uint8_t RA8875::FT5206_ReadRegU8(uint8_t reg) {
WiredHome 124:1690a7ae871c 833 char val;
WiredHome 190:3132b7dfad82 834
WiredHome 124:1690a7ae871c 835 m_i2c->write(m_addr, (const char *)&reg, 1);
WiredHome 124:1690a7ae871c 836 m_i2c->read(m_addr, &val, 1);
WiredHome 181:0032d1b8f5d4 837 //INFO("ReadReg %02X, Val %02X", reg, val);
WiredHome 124:1690a7ae871c 838 return (uint8_t)val;
WiredHome 124:1690a7ae871c 839 }
WiredHome 124:1690a7ae871c 840
WiredHome 124:1690a7ae871c 841 // Interrupt for touch detection
WiredHome 124:1690a7ae871c 842 void RA8875::TouchPanelISR(void)
WiredHome 124:1690a7ae871c 843 {
WiredHome 165:695c24cc5197 844 if (useTouchPanel == TP_FT5206) {
WiredHome 198:9b6851107426 845 if (FT5206_TouchPositions()) {
WiredHome 165:695c24cc5197 846 panelTouched = true;
WiredHome 198:9b6851107426 847 timeSinceTouch.reset();
WiredHome 198:9b6851107426 848 }
WiredHome 165:695c24cc5197 849 } else if (useTouchPanel == TP_GSL1680) {
WiredHome 198:9b6851107426 850 if (GSL1680_TouchPositions()) {
WiredHome 165:695c24cc5197 851 panelTouched = true;
WiredHome 198:9b6851107426 852 timeSinceTouch.reset();
WiredHome 198:9b6851107426 853 }
WiredHome 165:695c24cc5197 854 }
WiredHome 124:1690a7ae871c 855 }
WiredHome 124:1690a7ae871c 856
WiredHome 78:faf49c381591 857 // #### end of touch panel code additions