David Smart / Mbed 2 deprecated PUB_RA8875_Touch

A Touchscreen example program showing the RA8875 driver library. This is easily configured for either the Resistive touch panel or the Capacitive touch panel.

Dependencies:   mbed RA8875

main.cpp@3:ea71f57ca5f8, 2019-07-28 (annotated)

Committer:
WiredHome
Date:
Sun Jul 28 03:40:30 2019 +0000
Revision:
3:ea71f57ca5f8
Parent:
2:1d3c502e7f23
Child:
4:7f473b6b37c3
Update RA lib

Who changed what in which revision?

UserRevisionLine numberNew contents of line
WiredHome 0:ec2b5129231f 1 /// PUB_RA8875_Touch Example.
WiredHome 0:ec2b5129231f 2 ///
WiredHome 0:ec2b5129231f 3 /// This touch screen example shows how easy it is to use the RA8875 library with
WiredHome 0:ec2b5129231f 4 /// either the resistive touch panel, _OR_ the capacitive touch panel
WiredHome 0:ec2b5129231f 5 /// (using the FT5206 controller). When used with the capacitive touch
WiredHome 0:ec2b5129231f 6 /// it tracks 5 fingers simultaneously, and only 1 for the resistive panel.
WiredHome 0:ec2b5129231f 7 ///
WiredHome 2:1d3c502e7f23 8 /// @note Copyright © 2016 - 2019 by Smartware Computing, all rights reserved.
WiredHome 0:ec2b5129231f 9 /// Individuals may use this application for evaluation or non-commercial
WiredHome 0:ec2b5129231f 10 /// purposes. Within this restriction, changes may be made to this application
WiredHome 0:ec2b5129231f 11 /// as long as this copyright notice is retained. The user shall make
WiredHome 0:ec2b5129231f 12 /// clear that their work is a derived work, and not the original.
WiredHome 0:ec2b5129231f 13 /// Users of this application and sources accept this application "as is" and
WiredHome 0:ec2b5129231f 14 /// shall hold harmless Smartware Computing, for any undesired results while
WiredHome 0:ec2b5129231f 15 /// using this application - whether real or imagined.
WiredHome 0:ec2b5129231f 16 ///
WiredHome 0:ec2b5129231f 17 /// @author David Smart, Smartware Computing
WiredHome 0:ec2b5129231f 18 //
WiredHome 1:140215c838ce 19 #include "mbed.h" // Last tested: v5.11.4
WiredHome 1:140215c838ce 20 #include "RA8875.h" // Last tested: v164
WiredHome 0:ec2b5129231f 21
WiredHome 0:ec2b5129231f 22
WiredHome 3:ea71f57ca5f8 23 #ifndef MBED_MAJOR_VERSION
WiredHome 3:ea71f57ca5f8 24 #define MBED_MAJOR_VERSION 2
WiredHome 3:ea71f57ca5f8 25 #define MBED_MINOR_VERSION 0 // These are incorrect
WiredHome 3:ea71f57ca5f8 26 #define MBED_PATCH_VERSION 0 // These are incorrect
WiredHome 3:ea71f57ca5f8 27 #endif
WiredHome 3:ea71f57ca5f8 28
WiredHome 0:ec2b5129231f 29 // // // // // // // // // // // // // // // // // // // // // // // //
WiredHome 0:ec2b5129231f 30 // Configuration section
WiredHome 0:ec2b5129231f 31 // adjust the following information for the screen size, touch panel technology,
WiredHome 0:ec2b5129231f 32 // and port pin assignments.
WiredHome 0:ec2b5129231f 33 // // // // // // // // // // // // // // // // // // // // // // // //
WiredHome 0:ec2b5129231f 34
WiredHome 1:140215c838ce 35 // ############# CRITICAL - Set the display resolution ###############
WiredHome 1:140215c838ce 36 // Define BIG_SCREEN for 800x480 panel, undefine for 480x272
WiredHome 0:ec2b5129231f 37 #define BIG_SCREEN
WiredHome 0:ec2b5129231f 38
WiredHome 0:ec2b5129231f 39 // Define this for Cap touch panel, undefine for resistive
WiredHome 0:ec2b5129231f 40 #define CAP_TOUCH
WiredHome 0:ec2b5129231f 41
WiredHome 0:ec2b5129231f 42 #ifdef CAP_TOUCH
WiredHome 2:1d3c502e7f23 43 //
WiredHome 2:1d3c502e7f23 44 // Constructor when using the display that has a FT5206 Touch Controller
WiredHome 2:1d3c502e7f23 45 //
WiredHome 2:1d3c502e7f23 46 // LCD[ SPI:{MOSI,MISO,SCK}, /ChipSelect, /reset],
WiredHome 2:1d3c502e7f23 47 // Touch[ I2C:{SDA,SCL}, /IRQ],
WiredHome 2:1d3c502e7f23 48 // name
WiredHome 2:1d3c502e7f23 49 //
WiredHome 2:1d3c502e7f23 50 RA8875 lcd(p5,p6,p7,p12,NC, p9,p10,p13, "tft");
WiredHome 2:1d3c502e7f23 51
WiredHome 2:1d3c502e7f23 52 //
WiredHome 2:1d3c502e7f23 53 // Constructor when using the display that has a GSL1680 Touch Controller
WiredHome 2:1d3c502e7f23 54 //
WiredHome 2:1d3c502e7f23 55 // LCD[ SPI:{MOSI,MISO,SCK}, /ChipSelect, /reset],
WiredHome 2:1d3c502e7f23 56 // Touch[ I2C:{SDA,SCL}, Wake, /IRQ],
WiredHome 2:1d3c502e7f23 57 // name
WiredHome 2:1d3c502e7f23 58 //
WiredHome 2:1d3c502e7f23 59 //RA8875 lcd(p5,p6,p7,p12,NC, p9,p10,p14,p13, "tft");
WiredHome 2:1d3c502e7f23 60 //
WiredHome 0:ec2b5129231f 61 #else
WiredHome 2:1d3c502e7f23 62 //
WiredHome 2:1d3c502e7f23 63 // Constructor when using the basic display with integrated Resistive Touch Controller
WiredHome 2:1d3c502e7f23 64 //
WiredHome 2:1d3c502e7f23 65 // LCD[ SPI:{MOSI,MISO,SCK}, /ChipSelect, /reset],
WiredHome 2:1d3c502e7f23 66 // name
WiredHome 2:1d3c502e7f23 67 //
WiredHome 2:1d3c502e7f23 68 RA8875 lcd(p5, p6, p7, p12, NC, "tft");
WiredHome 2:1d3c502e7f23 69
WiredHome 1:140215c838ce 70 void InitTS(void); // Needed for Resistive Touch
WiredHome 1:140215c838ce 71 void CalibrateTS(void); // Needed for Resistive Touch
WiredHome 1:140215c838ce 72 const char * TS_Config = "/local/tpcal.cfg"; // Path and file for storing touch config
WiredHome 1:140215c838ce 73 LocalFileSystem local("local"); // Needed for resistive touch config storage
WiredHome 0:ec2b5129231f 74 #endif
WiredHome 0:ec2b5129231f 75
WiredHome 0:ec2b5129231f 76 #define PC_BAUD 460800 // I like the serial communications to be very fast
WiredHome 0:ec2b5129231f 77
WiredHome 0:ec2b5129231f 78 // // // // // // // // // // // // // // // // // // // // // // // //
WiredHome 0:ec2b5129231f 79 // End of Configuration Section
WiredHome 0:ec2b5129231f 80 // // // // // // // // // // // // // // // // // // // // // // // //
WiredHome 0:ec2b5129231f 81
WiredHome 0:ec2b5129231f 82 Serial pc(USBTX, USBRX); // Not required for display
WiredHome 0:ec2b5129231f 83
WiredHome 0:ec2b5129231f 84 #ifdef BIG_SCREEN
WiredHome 0:ec2b5129231f 85 #define LCD_W 800
WiredHome 0:ec2b5129231f 86 #define LCD_H 480
WiredHome 0:ec2b5129231f 87 #define LCD_C 8 // color - bits per pixel
WiredHome 0:ec2b5129231f 88 #define DEF_RADIUS 50 // default radius of the fingerprint
WiredHome 0:ec2b5129231f 89 #define BL_NORM 25 // Backlight Normal setting (0 to 255)
WiredHome 0:ec2b5129231f 90 #else
WiredHome 0:ec2b5129231f 91 #define LCD_W 480
WiredHome 0:ec2b5129231f 92 #define LCD_H 272
WiredHome 0:ec2b5129231f 93 #define LCD_C 8 // color - bits per pixel
WiredHome 0:ec2b5129231f 94 #define DEF_RADIUS 20 // default radius of the fingerprint
WiredHome 0:ec2b5129231f 95 #define BL_NORM 25 // Backlight Normal setting (0 to 255)
WiredHome 0:ec2b5129231f 96 #endif
WiredHome 0:ec2b5129231f 97
WiredHome 1:140215c838ce 98
WiredHome 1:140215c838ce 99
WiredHome 1:140215c838ce 100
WiredHome 0:ec2b5129231f 101 // When drawing a "fingerprint" under the touch point - the RA8875
WiredHome 1:140215c838ce 102 // cannot clip the drawing at the edge of the screen. Since it cannot
WiredHome 1:140215c838ce 103 // draw an object partially off-screen, this function shrinks the
WiredHome 1:140215c838ce 104 // fingerprint to fit as the touch approaches the edge of the screen.
WiredHome 0:ec2b5129231f 105 //
WiredHome 0:ec2b5129231f 106 int ComputeRadius(point_t p)
WiredHome 0:ec2b5129231f 107 {
WiredHome 0:ec2b5129231f 108 int radius = DEF_RADIUS;
WiredHome 0:ec2b5129231f 109
WiredHome 0:ec2b5129231f 110 if (p.x < radius)
WiredHome 0:ec2b5129231f 111 radius = p.x;
WiredHome 0:ec2b5129231f 112 else if (LCD_W - p.x < radius)
WiredHome 0:ec2b5129231f 113 radius = LCD_W - p.x;
WiredHome 0:ec2b5129231f 114 if (p.y < radius)
WiredHome 0:ec2b5129231f 115 radius = p.y;
WiredHome 0:ec2b5129231f 116 else if (LCD_H - p.y < radius)
WiredHome 0:ec2b5129231f 117 radius = LCD_H - p.y;
WiredHome 0:ec2b5129231f 118 return radius;
WiredHome 0:ec2b5129231f 119 }
WiredHome 0:ec2b5129231f 120
WiredHome 0:ec2b5129231f 121
WiredHome 0:ec2b5129231f 122 // And here is where the fun begins.
WiredHome 0:ec2b5129231f 123 int main()
WiredHome 0:ec2b5129231f 124 {
WiredHome 0:ec2b5129231f 125 color_t fingerColor[5] = {Blue, Red, Green, Yellow, Magenta};
WiredHome 0:ec2b5129231f 126
WiredHome 0:ec2b5129231f 127 pc.baud(PC_BAUD); //I like a snappy terminal, so crank it up!
WiredHome 0:ec2b5129231f 128 pc.printf("\r\nRA8875 Touch Screen Example - Build " __DATE__ " " __TIME__ "\r\n");
WiredHome 0:ec2b5129231f 129
WiredHome 1:140215c838ce 130 lcd.init(LCD_W,LCD_H,LCD_C,40); // 40 is rather dim, but doesn't overload USB ports so easily
WiredHome 0:ec2b5129231f 131 lcd.TouchPanelInit();
WiredHome 1:140215c838ce 132 lcd.foreground(White); // Change to white since it is starting kinda dim.
WiredHome 1:140215c838ce 133 lcd.printf("RA8875 Touch Screen Example - Build " __DATE__ " " __TIME__ "\r\n");
WiredHome 1:140215c838ce 134 lcd.printf("MBED v%d.%d.%d\r\n", MBED_MAJOR_VERSION, MBED_MINOR_VERSION, MBED_PATCH_VERSION);
WiredHome 0:ec2b5129231f 135
WiredHome 0:ec2b5129231f 136 point_t last[5]; // space for tracking 5 touches
WiredHome 0:ec2b5129231f 137 #ifndef CAP_TOUCH
WiredHome 0:ec2b5129231f 138 InitTS(); // resistive touch calibration
WiredHome 0:ec2b5129231f 139 #endif
WiredHome 0:ec2b5129231f 140
WiredHome 0:ec2b5129231f 141 // draw on one layer and erase the other for smoother transition while
WiredHome 0:ec2b5129231f 142 // is shows both layers.
WiredHome 0:ec2b5129231f 143 lcd.SetLayerMode(RA8875::BooleanOR);
WiredHome 0:ec2b5129231f 144 int layer = 0;
WiredHome 0:ec2b5129231f 145
WiredHome 0:ec2b5129231f 146 while (1) {
WiredHome 0:ec2b5129231f 147 TouchCode_t touch;
WiredHome 0:ec2b5129231f 148
WiredHome 0:ec2b5129231f 149 touch = lcd.TouchPanelReadable(); // any touch to report?
WiredHome 0:ec2b5129231f 150 if (touch) {
WiredHome 0:ec2b5129231f 151 layer++;
WiredHome 0:ec2b5129231f 152 printf("%d: %2X: ", lcd.TouchCount(), lcd.TouchGesture()); // all printf can be removed
WiredHome 0:ec2b5129231f 153
WiredHome 0:ec2b5129231f 154 // TouchChannels reports 1 for resistive panel and 5 for capacitive sense
WiredHome 0:ec2b5129231f 155 for (int i = 0; i < lcd.TouchChannels(); i++) {
WiredHome 0:ec2b5129231f 156 uint8_t id = lcd.TouchID(i); // 'id' tracks the individual touches
WiredHome 0:ec2b5129231f 157 TouchCode_t ev = lcd.TouchCode(i); // 'ev'ent indicates no_touch, touch, held, release, ...
WiredHome 0:ec2b5129231f 158 point_t xy = lcd.TouchCoordinates(i); // and of course the (x,y) coordinates
WiredHome 0:ec2b5129231f 159 int count = lcd.TouchCount(); // how many simultaneous touches
WiredHome 0:ec2b5129231f 160 printf("%2d,%d:(%4d,%4d) ", id, ev, xy.x, xy.y);
WiredHome 0:ec2b5129231f 161 if ((id < 5) || (i < count)) {
WiredHome 0:ec2b5129231f 162 int lastRadius, newRadius;
WiredHome 0:ec2b5129231f 163
WiredHome 0:ec2b5129231f 164 lastRadius = ComputeRadius(last[id]); // To erase the last fingerprint
WiredHome 0:ec2b5129231f 165 newRadius = ComputeRadius(xy); // Shrink near edge of screen
WiredHome 0:ec2b5129231f 166 lcd.SelectDrawingLayer(layer & 1);
WiredHome 0:ec2b5129231f 167 lcd.fillcircle(xy, newRadius, fingerColor[id]); // draw new fingerprint
WiredHome 0:ec2b5129231f 168 lcd.SelectDrawingLayer((layer+1) & 1);
WiredHome 0:ec2b5129231f 169 lcd.fillcircle(last[id], lastRadius, Black); // erase old fingerprint
WiredHome 0:ec2b5129231f 170 last[id] = xy;
WiredHome 0:ec2b5129231f 171 }
WiredHome 0:ec2b5129231f 172 }
WiredHome 0:ec2b5129231f 173 printf("\r\n");
WiredHome 0:ec2b5129231f 174 }
WiredHome 0:ec2b5129231f 175 }
WiredHome 1:140215c838ce 176 }
WiredHome 1:140215c838ce 177
WiredHome 1:140215c838ce 178 //
WiredHome 1:140215c838ce 179 //
WiredHome 1:140215c838ce 180 // For the Reistive Touch Screen, the following are essential.
WiredHome 1:140215c838ce 181 // For the Capacitive Touch Screen, none of the following is required.
WiredHome 1:140215c838ce 182 //
WiredHome 1:140215c838ce 183 //
WiredHome 1:140215c838ce 184 #ifndef CAP_TOUCH
WiredHome 1:140215c838ce 185 // Calibrate the resistive touch screen, and store the data on the
WiredHome 1:140215c838ce 186 // file system.
WiredHome 1:140215c838ce 187 //
WiredHome 1:140215c838ce 188 void CalibrateTS(void)
WiredHome 1:140215c838ce 189 {
WiredHome 1:140215c838ce 190 FILE * fh;
WiredHome 1:140215c838ce 191 tpMatrix_t matrix;
WiredHome 1:140215c838ce 192 RetCode_t r;
WiredHome 1:140215c838ce 193 Timer testperiod;
WiredHome 1:140215c838ce 194
WiredHome 1:140215c838ce 195 r = lcd.TouchPanelCalibrate("Calibrate the touch panel", &matrix);
WiredHome 1:140215c838ce 196 if (r == noerror) {
WiredHome 1:140215c838ce 197 fh = fopen(TS_Config, "wb");
WiredHome 1:140215c838ce 198 if (fh) {
WiredHome 1:140215c838ce 199 fwrite(&matrix, sizeof(tpMatrix_t), 1, fh);
WiredHome 1:140215c838ce 200 fclose(fh);
WiredHome 1:140215c838ce 201 printf(" tp cal written.\r\n");
WiredHome 1:140215c838ce 202 lcd.cls();
WiredHome 1:140215c838ce 203 } else {
WiredHome 1:140215c838ce 204 printf(" couldn't open tpcal file.\r\n");
WiredHome 1:140215c838ce 205 }
WiredHome 1:140215c838ce 206 } else {
WiredHome 1:140215c838ce 207 printf("error return: %d\r\n", r);
WiredHome 1:140215c838ce 208 }
WiredHome 1:140215c838ce 209 lcd.cls();
WiredHome 1:140215c838ce 210 }
WiredHome 1:140215c838ce 211
WiredHome 1:140215c838ce 212 // Try to load a previous resistive touch screen calibration from storage. If it
WiredHome 1:140215c838ce 213 // doesn't exist, activate the touch screen calibration process.
WiredHome 1:140215c838ce 214 //
WiredHome 1:140215c838ce 215 void InitTS(void)
WiredHome 1:140215c838ce 216 {
WiredHome 1:140215c838ce 217 FILE * fh;
WiredHome 1:140215c838ce 218 tpMatrix_t matrix;
WiredHome 1:140215c838ce 219
WiredHome 1:140215c838ce 220 fh = fopen(TS_Config, "rb");
WiredHome 1:140215c838ce 221 if (fh) {
WiredHome 1:140215c838ce 222 fread(&matrix, sizeof(tpMatrix_t), 1, fh);
WiredHome 1:140215c838ce 223 fclose(fh);
WiredHome 1:140215c838ce 224 lcd.TouchPanelSetMatrix(&matrix);
WiredHome 1:140215c838ce 225 printf(" tp cal loaded.\r\n");
WiredHome 1:140215c838ce 226 } else {
WiredHome 1:140215c838ce 227 CalibrateTS();
WiredHome 1:140215c838ce 228 }
WiredHome 1:140215c838ce 229 }
WiredHome 1:140215c838ce 230 #endif // CAP_TOUCH