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May be, reading the Part 2 of Arduino TFT Touch Screen matter will help you. The touch screen shield I got has ST7789V (0x7789), which is somewhat uncommon. This article is Part 2 of Arduino TFT Touch Screen Calculator By MCUFRIEND. These cheap China used-display stuffs basically have some risk of purchasing. If the driver is rare, you do not have much options. Identifying driver not also that easy. We feel that these web pages will help you :
1 2 3 | misc.ws/2015/01/24/lcd-touch-screen-information/ http://www.rinkydinkelectronics.com/p_utft_analog_clock.php https://docs.google.com/spreadsheets/d/11NiqGfhY6hEn82NVkdbyhqLUGae0Sy1m_vwhqrpiItQ/edit#gid=1863870689 |
Arduino TFT Touch Screen Calculator (MCUFRIEND)
If you notice my model of touch screen :
You’ll notice that it has no commonly seen Home, Message etc icons printed over the lower part. May be the thing was used by Samsung or LG for their mobile. If you dislike to read so much, here is code for you to test :
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 | #define PORTRAIT 0 #define LANDSCAPE 1 #define TOUCH_ORIENTATION PORTRAIT #include <Adafruit_GFX.h> // Core graphics library #include <MCUFRIEND_kbv.h> MCUFRIEND_kbv tft; // hard-wired for UNO shields anyway. #include <TouchScreen.h> #define BLACK 0x0000 #define BLUE 0x001F #define RED 0xF800 #define GREEN 0x07E0 #define CYAN 0x07FF #define MAGENTA 0xF81F #define YELLOW 0xFFE0 #define WHITE 0xFFFF #define BUTTON_X 30 #define BUTTON_Y 123 #define BUTTON_W 51 #define BUTTON_H 50 #define BUTTON_SPACING_X 07 #define BUTTON_SPACING_Y 07 #define BUTTON_TEXTSIZE 2 char buttonlabels[16][5] = { "1", "2", "3","+", "4", "5", "6","-", "7", "8", "9","/","=","0","DEL","x"}; uint16_t buttoncolors[16] = { BLUE,BLUE,BLUE,GREEN,BLUE,BLUE,BLUE,GREEN,BLUE,BLUE,BLUE,GREEN,GREEN,BLUE,RED,BLUE }; Adafruit_GFX_Button buttons[16]; int col=0,row=0,z=0; #define TEXT_X 5 #define TEXT_Y 25 #define TEXT_W (tft.width()-10) #define TEXT_H 70 #define TEXT_TSIZE 3 #define TEXT_TCOLOR BLACK char q; const int XP=7,XM=A1,YP=A2,YM=6; //240x320 ID=0x7789 const int TS_LEFT=337,TS_RT=653,TS_TOP=797,TS_BOT=495; // Calibrate values #define TS_MINX 125 #define TS_MINY 85 #define TS_MAXX 800 #define TS_MAXY 905 uint32_t num1,num2; char operator_type=-1; #define TEXT_LEN 10 char textfield[TEXT_LEN+1] = ""; uint8_t textfield_i=0; uint32_t result=0; #define MINPRESSURE 400 #define MAXPRESSURE 800 TouchScreen ts = TouchScreen(XP, YP, XM, YM, 350); TSPoint tp; boolean n=false; char test=0; uint16_t identifier; void setup() { // put your setup code here, to run once: Serial.begin(9600); tft.reset(); identifier = tft.readID(); tft.begin(identifier); tft.fillScreen(WHITE); tft.setRotation(0); start_screen(); } void loop() { get_button(); if(q> 0 && q<=16) { q--; if(get_number(q)!=-1) { test++; if(test==1) { num1=get_number(q); pressed_button(); animate(); display_text(); } else if(test==2 && operator_type!=-1){ num2=get_number(q); pressed_button(); animate(); display_text(); test=0; } } else if(get_opertator(q)!=-1) { operator_type=get_opertator(q); pressed_button(); animate(); display_text(); }else if(q==12) {display_text(); switch (operator_type) { case 0:result=num1+num2;break; case 1:result=num1-num2;break; case 2:result=num1/num2;break; case 3:result=num1*num2;break; } result_display(); operator_type=-1; test=0; num1=0; num2=0; char textfield[TEXT_LEN+1] = ""; textfield_i=0; n=true; } else if(q==14 && test!=0) { clr_button(); test--; animate(); display_text(); } q=0; } } void get_button() {for (uint8_t b=0; b<16; b++) { if (buttons[b].contains(tp.x, tp.y)) { buttons[b].press(true); // tell the button it is pressed q=b+1; } else { buttons[b].press(false); // tell the button it is NOT pressed } } } void animate() { if (buttons[q].justPressed()) { buttons[q].drawButton(true); // draw invert! delay(10); buttons[q].drawButton(); } } void clr_button() { textfield[textfield_i] = 0; if (textfield > 0) { textfield_i--; textfield[textfield_i] = ' '; } } int get_number(unsigned int num) { switch (num) { case 0x00: return 1; break; case 0x01: return 2; break; case 0x02: return 3; break; case 0x04: return 4; break; case 0x05: return 5; break; case 0x06: return 6; break; case 0x08: return 7; break; case 0x09: return 8; break; case 0x0A: return 9; break; case 0x0D: return 0; break; default: return -1;break; } } int get_opertator(const char num) { switch (num) { case 0x03: return 0;break; case 0x07: return 1;break; case 0x0B: return 2;break; case 0x0F: return 3;break; default: return -1;break; } } void display_text() { tft.setCursor(TEXT_X + 2, TEXT_Y+10); tft.setTextColor(TEXT_TCOLOR, WHITE); tft.setTextSize(TEXT_TSIZE); tft.print(textfield); } void clear_result() { tft.setCursor(TEXT_X + 2, TEXT_Y+40); tft.setTextColor(TEXT_TCOLOR, WHITE); tft.setTextSize(TEXT_TSIZE); tft.print(" "); tft.setCursor(TEXT_X + 2, TEXT_Y+10); tft.print(" "); n=false; } void result_display() { tft.setCursor(TEXT_X + 2, TEXT_Y+40); tft.setTextColor(TEXT_TCOLOR, WHITE); tft.setTextSize(TEXT_TSIZE); tft.print('='); tft.print(result); } void pressed_button() { textfield[textfield_i] = buttonlabels[q][0]; textfield_i++; textfield[textfield_i] = 0; // zero terminate } void button_ini() { for(int i=0;i<4;i++) { for(int j=0;j<4;j++) creat_button(i,j); } } //function to creat buttons void creat_button(int x,int y) {row=x;col=y; buttons[z].initButton(&tft, BUTTON_X+col*(BUTTON_W+BUTTON_SPACING_X), BUTTON_Y+row*(BUTTON_H+BUTTON_SPACING_Y), // x, y, w, h, outline, fill, text BUTTON_W, BUTTON_H, BLACK, buttoncolors[z],BLACK, buttonlabels[z], BUTTON_TEXTSIZE); buttons[z].drawButton(); z++; } void start_screen() { tft.fillScreen(WHITE); tft.setCursor ((tft.width()/2)-60, 5); tft.setTextSize (2); tft.setTextColor(BLACK); tft.println("CALCULATOR"); tft.drawRoundRect(TEXT_X, TEXT_Y, TEXT_W, TEXT_H, 10, BLACK); button_ini(); waitfortouch(); } void drawBorder () {// Draw a border uint16_t width = tft.width() - 1; uint16_t height = tft.height() - 1; uint8_t border = 10; tft.fillScreen(RED); tft.fillRect(border, border, (width - border * 2), (height - border * 2), WHITE); } TSPoint waitfortouch() { do { tp= ts.getPoint(); pinMode(XM, OUTPUT); //Pins configures again for TFT control pinMode(YP, OUTPUT); } while((tp.z < MINPRESSURE )|| (tp.z > MAXPRESSURE)); tp.x = map(tp.x, TS_MINX, TS_MAXX, 0, tft.width()); tp.y = map(tp.y, TS_MINY, TS_MAXY, 0, tft.height()); return tp; } |
For practical purpose, the above code is also available on GitHub as project. The origin of the above thing is from :
1 | https://github.com/shubhamtrivedi95/Calculator-using-arduino/blob/master/calculator/calculator.ino |
We also kept the serial text outputs out of various codes :
1 | https://github.com/AbhishekGhosh/MCUFRIEND-ST7789V-TFT-Calculator/blob/master/ST7789V.txt |
There is no actually not many more things to write. May be there will be another part in future?
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