├── LICENSE ├── README.md └── ST7735_menu_encoder.ino /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. By contrast, 15 | the GNU General Public License is intended to guarantee your freedom to 16 | share and change all versions of a program--to make sure it remains free 17 | software for all its users. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # ST7735 Simple menu with encoder 2 | Implementation of simple graphic user interface using cheap encoder and color LCD 3 | 4 | ## Required libraries 5 | * RRE Font: https://github.com/cbm80amiga/RREFont 6 | * Fast ST7735 optimized for AVR: https://github.com/cbm80amiga/Arduino_ST7735_Fast 7 | 8 | YouTube video: 9 | 10 | https://youtu.be/mVNaiqcpl4w 11 | 12 | 13 | If you find it useful and want to buy me a coffee or a beer: 14 | 15 | https://www.paypal.me/cbm80amiga 16 | 17 | -------------------------------------------------------------------------------- /ST7735_menu_encoder.ino: -------------------------------------------------------------------------------- 1 | // ST7735 Menu with Encoder 2 | // (C)2021 Pawel A. Hernik 3 | // YouTube video: https://youtu.be/mVNaiqcpl4w 4 | // Requires: 5 | // RREFont: https://github.com/cbm80amiga/RREFont 6 | // Arduino_ST7735: https://github.com/cbm80amiga/Arduino_ST7735_Fast 7 | 8 | /* 9 | ST7735 128x160 1.8" LCD pinout (header at the top, from left): 10 | #1 LED -> 3.3V 11 | #2 SCK -> SCL/D13/PA5 12 | #3 SDA -> MOSI/D11/PA7 13 | #4 A0/DC -> D8/PA1 or any digital 14 | #5 RESET -> D9/PA0 or any digital 15 | #6 CS -> D10/PA2 or any digital 16 | #7 GND -> GND 17 | #8 VCC -> 3.3V 18 | */ 19 | 20 | #define SCR_WD 128 21 | #define SCR_HT 160 22 | #include 23 | #include 24 | 25 | #if (__STM32F1__) // bluepill 26 | #define TFT_CS PA2 27 | #define TFT_DC PA1 28 | #define TFT_RST PA0 29 | // use 3 debouncing capacitors (100nF seems to be enough) 30 | #define encoderPinA PB4 31 | #define encoderPinB PB5 32 | #define encoderButton PB6 33 | //#include 34 | #else 35 | #define TFT_CS 10 36 | #define TFT_DC 8 37 | #define TFT_RST 9 38 | // use 3 debouncing capacitors (100nF seems to be enough) 39 | #define encoderPinA 2 40 | #define encoderPinB 4 41 | #define encoderButton 3 42 | #include 43 | #endif 44 | 45 | Arduino_ST7735 lcd = Arduino_ST7735(TFT_DC, TFT_RST, TFT_CS); 46 | 47 | #include "RREFont.h" 48 | //#include "rre_kx16x26h.h" 49 | //#include "rre_kx9x14h.h" 50 | #include "rre_fjg_8x16.h" 51 | //#include "rre_vga_8x16.h" 52 | //#include "rre_4x7.h" 53 | #include "rre_5x8.h" 54 | 55 | RREFont font; 56 | // needed for RREFont library initialization, define your fillRect 57 | void customRect(int x, int y, int w, int h, int c) { return lcd.fillRect(x, y, w, h, c); } 58 | 59 | #include 60 | 61 | // ------------------------- 62 | volatile int encoderPos=0, encoderPosOld=0, encoderStep=2; 63 | 64 | void initEncoder() 65 | { 66 | encoderPos=0; 67 | pinMode(encoderPinA, INPUT_PULLUP); 68 | pinMode(encoderPinB, INPUT_PULLUP); 69 | pinMode(encoderButton, INPUT_PULLUP); 70 | attachInterrupt(digitalPinToInterrupt(encoderPinA), readEncoderInt, CHANGE); // encoder pin on interrupt 0 = pin 2 71 | attachInterrupt(digitalPinToInterrupt(encoderButton), buttonInt, CHANGE); // encoder pin on interrupt 1 = pin 3 72 | } 73 | 74 | void buttonInt() {} 75 | 76 | void readEncoderInt() 77 | { 78 | //(digitalRead(encoderPinA) == digitalRead(encoderPinB)) ? encoderPos++ : encoderPos--; 79 | uint8_t pd = PIND & B10100; // inputs #2 and #4 direct reading 80 | ((pd == B10100) || (pd == B00000)) ? encoderPos++ : encoderPos--; 81 | } 82 | 83 | int readButton() 84 | { 85 | const long btDebounce = 30; 86 | static long btTime = 0; 87 | static int lastState = HIGH; 88 | int val = 0, state = digitalRead(encoderButton); 89 | if (state == LOW && lastState == HIGH) { btTime = millis(); val=0; } 90 | if (state == HIGH && lastState == LOW && millis()-btTime >= btDebounce) { val=1; } 91 | lastState = state; 92 | return val; 93 | } 94 | 95 | // ------------------------- 96 | long readVcc() 97 | { 98 | long result; 99 | // Read 1.1V reference against AVcc 100 | ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1); 101 | delay(2); // Wait for Vref to settle 102 | ADCSRA |= _BV(ADSC); // Convert 103 | while (bit_is_set(ADCSRA,ADSC)); 104 | result = ADCL; 105 | result |= ADCH<<8; 106 | result = 1125300L / result; // Back-calculate AVcc in mV 107 | return result; 108 | } 109 | 110 | float readIntTemp() 111 | { 112 | long result; 113 | // Read temperature sensor against 1.1V reference 114 | ADMUX = _BV(REFS1) | _BV(REFS0) | _BV(MUX3); 115 | delay(5); // Wait for Vref to settle 116 | ADCSRA |= _BV(ADSC); // Convert 117 | while (bit_is_set(ADCSRA, ADSC)); 118 | result = ADCL; 119 | result |= ADCH << 8; 120 | result = (result - 125) * 1075; 121 | return result/10000.0; 122 | } 123 | 124 | // ------------------------- 125 | #define MAXSIN 255 126 | const uint8_t sinTab[91] PROGMEM = { 127 | 0,4,8,13,17,22,26,31,35,39,44,48,53,57,61,65,70,74,78,83,87,91,95,99,103,107,111,115,119,123, 128 | 127,131,135,138,142,146,149,153,156,160,163,167,170,173,177,180,183,186,189,192,195,198,200,203,206,208,211,213,216,218, 129 | 220,223,225,227,229,231,232,234,236,238,239,241,242,243,245,246,247,248,249,250,251,251,252,253,253,254,254,254,254,254, 130 | 255 131 | }; 132 | 133 | int fastSin(int i) 134 | { 135 | while(i<0) i+=360; 136 | while(i>=360) i-=360; 137 | if(i<90) return(pgm_read_byte(&sinTab[i])); else 138 | if(i<180) return(pgm_read_byte(&sinTab[180-i])); else 139 | if(i<270) return(-pgm_read_byte(&sinTab[i-180])); else 140 | return(-pgm_read_byte(&sinTab[360-i])); 141 | } 142 | 143 | int fastCos(int i) 144 | { 145 | return fastSin(i+90); 146 | } 147 | 148 | char buf[100]; 149 | 150 | void drawGauge1(int level) 151 | { 152 | int sx,sy,xs0,ys0,xe0,ye0,xs1,ys1,xe1,ye1; 153 | int cx=SCR_WD/2; 154 | int cy=SCR_HT/2; 155 | int rx0=40, ry0=40; 156 | int rx1=63, ry1=63; 157 | int mina=-60; 158 | int maxa=180+60; 159 | for(int i=mina; i menu of options, 0..n -> option 205 | int storedPos = 0; 206 | 207 | uint16_t bgCol = RGBto565(30,30,140); 208 | uint16_t frameCol = RGBto565(255,255,40); 209 | uint16_t itemCol = RGBto565(220,220,220); 210 | uint16_t sliderCol = RGBto565(20,180,180); 211 | 212 | void showHelp() 213 | { 214 | lcd.fillScreen(RGBto565(150,0,0)); 215 | font.setColor(WHITE); 216 | font.printStr(ALIGN_CENTER, 4, "Help"); 217 | font.setColor(YELLOW); 218 | font.setCR(1); 219 | font.setCharMinWd(0); 220 | font.printStr(5, 24, "Use encoder to select menu item.\nPress button to exit."); 221 | font.setCR(0); 222 | } 223 | 224 | void showSelected(char *txt) 225 | { 226 | lcd.fillScreen(RGBto565(150,0,150)); 227 | font.setColor(WHITE); font.printStr(10, 10, "Selected:"); 228 | font.setColor(YELLOW); font.printStr(10, 30, txt); 229 | } 230 | 231 | void printMenuItem(int y, char *item) 232 | { 233 | font.setColor(itemCol); 234 | font.printStr(3,2+y*itemHt,item); 235 | } 236 | 237 | void printMenu(int full=0) 238 | { 239 | int n = numMenus 40) encoderPos = 40; 300 | drawGauge1(encoderPos/encoderStep); 301 | } 302 | 303 | // ------------- 304 | int colR,colG,colB; 305 | int colRold,colGold,colBold; 306 | int setRGBMode = 0; 307 | int colBarWd = 96; 308 | int colBarY0 = 5; 309 | int colBarY = 40; 310 | int colBarHt = 30; 311 | int encoderMin = 0; 312 | int encoderMax = 255; 313 | 314 | void setColorInit(uint16_t *c) 315 | { 316 | colR = (*c&0xf800)>>8; 317 | colG = (*c&0x7e0)>>3; 318 | colB = (*c&0x1f)<<3; 319 | colRold = colGold = colBold = 0; 320 | lcd.fillScreen(BLACK); 321 | for(int i=0;i<32;i++) { // 96 pixels wide, 32 shades 322 | lcd.fillRect(2+i*3,colBarY0+colBarY*0,3,colBarHt,RGBto565(i*8,0,0)); 323 | lcd.fillRect(2+i*3,colBarY0+colBarY*1,3,colBarHt,RGBto565(0,i*8,0)); 324 | lcd.fillRect(2+i*3,colBarY0+colBarY*2,3,colBarHt,RGBto565(0,0,i*8)); 325 | } 326 | lcd.drawRect(1,colBarY0+colBarY*0-1,colBarWd+2,colBarHt+2,RGBto565(128,0,0)); 327 | lcd.drawRect(1,colBarY0+colBarY*1-1,colBarWd+2,colBarHt+2,RGBto565(0,128,0)); 328 | lcd.drawRect(1,colBarY0+colBarY*2-1,colBarWd+2,colBarHt+2,RGBto565(0,0,128)); 329 | lcd.fillRect(128-50-2,160-25-2,50,25,*c); // cancel 330 | encoderMax = 4; 331 | } 332 | 333 | void setColorAction(uint16_t *col, int butt) 334 | { 335 | if(encoderPos < encoderMin*encoderStep) encoderPos = encoderMin*encoderStep; 336 | if(encoderPos > encoderMax*encoderStep) encoderPos = encoderMax*encoderStep; 337 | int pos = encoderPos/encoderStep; 338 | int frw = 2+96+2; 339 | if(butt) { 340 | if(setRGBMode>0) { 341 | encoderStep = 2; 342 | encoderPos = (setRGBMode-1)*encoderStep; 343 | setRGBMode = 0; 344 | encoderMax = 4; 345 | } else { 346 | if(pos==3 || pos==4) { 347 | if(pos==3) *col = RGBto565(colR,colG,colB); 348 | menuMode = -1; 349 | initMenu(); 350 | encoderPos = storedPos; 351 | setRGBMode = 0; 352 | encoderStep = 2; 353 | return; 354 | } 355 | setRGBMode = pos+1; 356 | encoderMax = 255; 357 | encoderStep = 1; 358 | if(setRGBMode==1) { encoderPos = colR; lcd.drawRect(0,colBarY0+colBarY*0-2,frw,colBarHt+4,RGBto565(255,80,80)); } else 359 | if(setRGBMode==2) { encoderPos = colG; lcd.drawRect(0,colBarY0+colBarY*1-2,frw,colBarHt+4,RGBto565(80,255,80)); } else 360 | if(setRGBMode==3) { encoderPos = colB; lcd.drawRect(0,colBarY0+colBarY*2-2,frw,colBarHt+4,RGBto565(80,80,255)); } 361 | return; 362 | } 363 | } 364 | if(setRGBMode==1) colR = pos; else 365 | if(setRGBMode==2) colG = pos; else 366 | if(setRGBMode==3) colB = pos; 367 | 368 | font.setColor(WHITE,BLACK); 369 | int xcol=128-9*3+1; 370 | if(setRGBMode==0 || setRGBMode==1) { dtostrf(colR,3,0,buf); font.printStr(xcol,colBarY0+colBarY*0+8,buf); } 371 | if(setRGBMode==0 || setRGBMode==2) { dtostrf(colG,3,0,buf); font.printStr(xcol,colBarY0+colBarY*1+8,buf); } 372 | if(setRGBMode==0 || setRGBMode==3) { dtostrf(colB,3,0,buf); font.printStr(xcol,colBarY0+colBarY*2+8,buf); } 373 | font.setColor(WHITE); 374 | 375 | if(colRold!=colR) { 376 | lcd.drawFastVLine(2+3*colRold/8,colBarY0+colBarY*0,colBarHt,RGBto565(colRold,0,0)); 377 | lcd.drawFastVLine(2+3*colR/8, colBarY0+colBarY*0,colBarHt,YELLOW); 378 | colRold=colR; 379 | } 380 | if(colGold!=colG) { 381 | lcd.drawFastVLine(2+3*colGold/8,colBarY0+colBarY*1,colBarHt,RGBto565(0,colGold,0)); 382 | lcd.drawFastVLine(2+3*colG/8, colBarY0+colBarY*1,colBarHt,YELLOW); 383 | colGold=colG; 384 | } 385 | if(colBold!=colB) { 386 | lcd.drawFastVLine(2+3*colBold/8,colBarY0+colBarY*2,colBarHt,RGBto565(0,0,colBold)); 387 | lcd.drawFastVLine(2+3*colB/8, colBarY0+colBarY*2,colBarHt,YELLOW); 388 | colBold=colB; 389 | } 390 | 391 | lcd.fillRect( 2,160-25-2,50,25,RGBto565(colR,colG,colB)); // ok 392 | 393 | if(setRGBMode==0) { 394 | lcd.drawRect(0,colBarY0+colBarY*0-2,frw,colBarHt+4,BLACK); 395 | lcd.drawRect(0,colBarY0+colBarY*1-2,frw,colBarHt+4,BLACK); 396 | lcd.drawRect(0,colBarY0+colBarY*2-2,frw,colBarHt+4,BLACK); 397 | lcd.drawRect( 0,160-25-4,50+4,25+4,BLACK); 398 | lcd.drawRect(128-50-4,160-25-4,50+4,25+4,BLACK); 399 | switch(pos) { 400 | case 0: lcd.drawRect(0,colBarY0+colBarY*0-2,frw,colBarHt+4,WHITE); break; 401 | case 1: lcd.drawRect(0,colBarY0+colBarY*1-2,frw,colBarHt+4,WHITE); break; 402 | case 2: lcd.drawRect(0,colBarY0+colBarY*2-2,frw,colBarHt+4,WHITE); break; 403 | case 3: lcd.drawRect( 0,160-25-4,50+4,25+4,WHITE); break; 404 | case 4: lcd.drawRect(128-50-4,160-25-4,50+4,25+4,WHITE); break; 405 | } 406 | } 407 | } 408 | 409 | // ------------- 410 | 411 | uint16_t reqBgCol = RGBto565(0,80,0); 412 | int reqY = 110; 413 | 414 | void reqInit() 415 | { 416 | lcd.fillScreen(reqBgCol); 417 | font.setColor(WHITE); 418 | font.printStr(ALIGN_CENTER,50,"Are you sure?"); 419 | font.setColor(YELLOW); 420 | font.printStr(8,reqY," OK "); 421 | font.printStr(ALIGN_RIGHT,reqY," CANCEL "); 422 | } 423 | 424 | void reqAction() 425 | { 426 | if(encoderPos < 0) encoderPos = 0; 427 | if(encoderPos > 1*encoderStep) encoderPos = 1*encoderStep; 428 | int pos = encoderPos/encoderStep; 429 | lcd.drawRect(8,reqY-3,4*9-2,20,reqBgCol); 430 | lcd.drawRect(128-8*9,reqY-3,8*9-4,20,reqBgCol); 431 | if(pos==0) lcd.drawRect(8,reqY-3,4*9-2,20,WHITE); else 432 | if(pos==1) lcd.drawRect(128-8*9,reqY-3,8*9-4,20,WHITE); 433 | } 434 | 435 | // ------------- 436 | 437 | void showBattery() 438 | { 439 | char flt[10]; 440 | long v=readVcc(); 441 | lcd.fillScreen(BLACK); 442 | dtostrf(v/1000.0,1,3,flt); 443 | snprintf(buf,90,"Vcc=%sV",flt); 444 | font.setColor(WHITE); 445 | font.printStr(16,30,buf); 446 | lcd.drawRect(10,60,128-20-8,50,WHITE); 447 | lcd.fillRect(10+128-20-8,60+15,8,20,WHITE); 448 | int bwd = 128-20-8-8l; 449 | uint16_t c = YELLOW; 450 | if(v>3600) c = GREEN; 451 | if(v<3100) c = RED; 452 | long fill = constrain(map(v,2900,4200,0,bwd-10),0,bwd-10); 453 | lcd.fillRect(14,64,fill+10,50-8,c); 454 | } 455 | 456 | void showIntTemp() 457 | { 458 | char flt[10]; 459 | lcd.fillScreen(BLACK); 460 | dtostrf(readIntTemp(),2,1,flt); 461 | snprintf(buf,90,"Temp=%s'C",flt); 462 | font.setColor(WHITE); 463 | font.printStr(ALIGN_CENTER,70,buf); 464 | } 465 | 466 | void dumpEEPROM() 467 | { 468 | //font.setFont(&rre_4x7); font.setCharMinWd(4); 469 | font.setFont(&rre_5x8); font.setCharMinWd(5); 470 | if(encoderPos>=(128-16)*2) encoderPos=(128-16)*2; 471 | int st = encoderPos/encoderStep; 472 | for(int j=0;j<16;j++) { 473 | int ii = st*8+j*8; 474 | ii&=0x3ff; // max 1kB 475 | snprintf(buf,8,"%03X",ii); 476 | font.setColor(YELLOW,BLACK); 477 | font.printStr(0, j*10, buf); 478 | for(int i=0;i<8;i++) { 479 | int v = EEPROM.read(ii+i); 480 | snprintf(buf,8,"%02X",v); 481 | font.setColor(WHITE,BLACK); 482 | font.printStr(5*4+2+i*13, j*10, buf); 483 | } 484 | } 485 | } 486 | 487 | // ------------- 488 | 489 | void menuItemInit() 490 | { 491 | setMenu(menuSel); 492 | switch(menuMode) { 493 | case 0: lcd.fillScreen(BLACK); encoderPos=5*encoderStep; break; // for setValue() 494 | case 1: showHelp(); break; 495 | case 2: showIntTemp(); break; 496 | case 3: showBattery(); break; 497 | case 4: lcd.fillScreen(BLACK); break; // for dumpEEPROM() 498 | case 6: setColorInit(&bgCol); break; 499 | case 7: setColorInit(&itemCol); break; 500 | case 8: setColorInit(&frameCol); break; 501 | case 9: setColorInit(&sliderCol); break; 502 | case 11: reqInit(); break; 503 | default: showSelected(menuTxt[menuSel]); 504 | } 505 | } 506 | 507 | void menuItemAction(int butt) 508 | { 509 | switch(menuMode) { 510 | case 0: setValue(); endMenu(butt); break; 511 | case 4: dumpEEPROM(); endMenu(butt); break; 512 | case 6: setColorAction(&bgCol,butt); break; 513 | case 7: setColorAction(&itemCol,butt); break; 514 | case 8: setColorAction(&frameCol,butt); break; 515 | case 9: setColorAction(&sliderCol,butt); break; 516 | case 11: reqAction(); endMenu(butt); break; 517 | default: endMenu(butt); 518 | } 519 | } 520 | 521 | void handleMenu() 522 | { 523 | int butt = readButton(); 524 | if(encoderPos < 0) encoderPos = 0; 525 | if(encoderPosOld == encoderPos && !butt) return; 526 | encoderPosOld = encoderPos; 527 | if(menuMode == -1) { 528 | menuSel = encoderPos / encoderStep; 529 | if(menuSel >= numMenus) { 530 | menuSel = numMenus - 1; 531 | encoderPos = menuSel * encoderStep; 532 | } 533 | if(menuSel >= menuStart + numScrLines) { 534 | menuStart = menuSel - numScrLines + 1; 535 | printMenu(); 536 | } 537 | if(menuSel < menuStart) { 538 | menuStart = menuSel; 539 | printMenu(); 540 | } 541 | if(menuSelOld != menuSel) { 542 | drawFrame(menuSelOld,0); 543 | drawFrame(menuSel,1); 544 | drawMenuSlider(); 545 | menuSelOld = menuSel; 546 | } 547 | if(butt) menuItemInit(); 548 | } else menuItemAction(butt); 549 | } 550 | 551 | void setup() 552 | { 553 | Serial.begin(9600); 554 | lcd.init(); 555 | //lcd.fillScreen(bgCol); 556 | font.init(customRect, SCR_WD, SCR_HT); // custom fillRect function and screen width and height values 557 | initEncoder(); 558 | initMenu(); 559 | } 560 | 561 | void loop() 562 | { 563 | /* 564 | if(encoderPosOld!=encoderPos) { 565 | encoderPosOld=encoderPos; 566 | snprintf(buf,20,"Encoder %02d",encoderPos); 567 | font.setColor(WHITE); 568 | lcd.fillRect(3,140,120,16,BLACK); 569 | font.printStr(3,140,buf); 570 | }*/ 571 | 572 | handleMenu(); 573 | } 574 | 575 | --------------------------------------------------------------------------------