Jouer avec les écrans LCD

Comment utiliser des écrans LCD ?

Matériel

• Wemos D1 mini - 2,35€ - https://fr.aliexpress.com/item/1pcs-D1-mini-Mini-NodeMcu-4M-bytes-Lua-WIFI-Internet-of-Things-development-board-based-ESP8266/32666984035.html
• des cables - qq cts
• un écran LCD 128X64 - 2,2€ - https://fr.aliexpress.com/item/WAVGAT-Blue-color-128X64-OLED-LCD-LED-Display-Module-For-Arduino-0-96-I2C-IIC-SPI/32830523451.html

Prix pour un système : 4,55€

tuto

• Voir tuto pour écran OLED 128X64 pixels
• https://www.hackster.io/muhammad-aqib/how-to-use-oled-display-with-arduino-arduino-oled-tutorial-233985

Mode d'emplois

Installer la bibliothèque esp8266-oled-ssd1306 (depuis croquis -> inclure un bibliothèque -> gérer les bibliothèques puis tapez SSD1306 dans la recherche.

créer ses propres fichiers image à afficher

Faites une image en respectant ces règles :

• monochrome
• format PNG
• taille : 48 X 48 pixels (c'est la taille du logo du Science Hack Day mais l'écran faisant 128X64 pixels, j'imagine qu'on peut aller jusque là ?).

utiliser le site https://www.online-utility.org/image_converter.jsp

choisir "mono - bi-level bitmap in least significant-byte first order"

cliquer sur " select format"

importez votre fichier image et récupérez le fichier que vous utiliserez pour le programme Arduino.

Afficher un logo Science Hack Day défilant

ouvrir une nouvelle fenetre de programme arduino. copiez-collez le programme principal cliquez à droite sur la flèche vers le bas et choisissez "nouvel onglet"

saisissez le nom "image.h"

Copiez-collez le code plus bas ou le code correspondant à votre image

  1 /////////////////////////////////
  2 //                             //
  3 //      Affichage du logo      //
  4 //     du Science Hack Day     //
  5 //   Sur un écran LCD 128X64   //
  6 //                             //
  7 /////////////////////////////////
  8 /* Bon, le code est encore très "FRANKENCODE" - A vous d'adapter !
  9 ///////////////////////////////////////////////////////////////////
 10 //                           BROCHAGE                            //
 11 //                      _________________                        //
 12 //                     /     D1 mini     \                       //
 13 //                 -  |[ ]RST        TX[ ]| -                    //
 14 //                 -  |[ ]A0         RX[ ]| -                    //
 15 //                 -  |[ ]D0         D1[ ]| -                    //
 16 //             SCL -  |[X]D5         D2[ ]| -                    //
 17 //             SDA -  |[X]D6         D3[ ]| -                    //
 18 //                 -  |[ ]D7         D4[ ]| LED_BUILTIN          //
 19 //                 -  |[ ]D8        GND[X]| -                    //
 20 //                 -  |[ ]3V3 .      5V[X]| -                    //
 21 //                    |       +---+       |                      //
 22 //                    |_______|USB|_______|                      //
 23 ///////////////////////////////////////////////////////////////////                    
 24 */
 25 /*
 26  * The MIT License (MIT)
 27  *
 28  * Copyright (c) 2016 by Daniel Eichhorn
 29  *
 30  * Permission is hereby granted, free of charge, to any person obtaining a copy
 31  * of this software and associated documentation files (the "Software"), to deal
 32  * in the Software without restriction, including without limitation the rights
 33  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 34  * copies of the Software, and to permit persons to whom the Software is
 35  * furnished to do so, subject to the following conditions:
 36  *
 37  * The above copyright notice and this permission notice shall be included in all
 38  * copies or substantial portions of the Software.
 39  *
 40  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 41  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 42  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 43  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 44  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 45  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 46  * SOFTWARE.
 47  *
 48  */
 49 #include <Wire.h> 
 50 #include "SSD1306.h"
 51 
 52 // Inclure les images personalisées
 53 #include "images.h"
 54 
 55 // Initialisation de l'écran LCD en utilisant la bibliothèque Wire
 56 SSD1306  display(0x3c, D6, D5);
 57 // la comunication I2C à l'adresse 0x3c (pour l'écran OLED 128x64), broché en D6 pour SDA et D5 pour SCL 
 58 
 59 
 60 #define DEMO_DURATION 3000
 61 typedef void (*Demo)(void);
 62 
 63 int demoMode = 0;
 64 int counter = 1;
 65 int i =0;
 66 int a = 0;
 67 
 68 void setup() {
 69   Serial.begin(115200);
 70   Serial.println();
 71   Serial.println();
 72 
 73 
 74   // Initialising the UI will init the display too.
 75   display.init();
 76 
 77   display.flipScreenVertically();
 78   display.setFont(ArialMT_Plain_10);
 79 
 80 }
 81 
 82 void drawFontFaceDemo() {
 83     // Font Demo1
 84     // create more fonts at http://oleddisplay.squix.ch/
 85     display.setTextAlignment(TEXT_ALIGN_CENTER);
 86     display.setFont(ArialMT_Plain_10);
 87     display.drawString(0, 0, "SCIENCE HACK DAY");
 88 }
 89 
 90 void drawTextFlowDemo() {
 91     display.setFont(ArialMT_Plain_10);
 92     display.setTextAlignment(TEXT_ALIGN_LEFT);
 93     display.drawStringMaxWidth(0, 0, 128,
 94       "Lorem ipsum\n dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore." );
 95 }
 96 
 97 void drawTextAlignmentDemo() {
 98     // Text alignment demo
 99   display.setFont(ArialMT_Plain_10);
100 
101   // The coordinates define the left starting point of the text
102   display.setTextAlignment(TEXT_ALIGN_LEFT);
103   display.drawString(0, 10, "Left aligned (0,10)");
104 
105   // The coordinates define the center of the text
106   display.setTextAlignment(TEXT_ALIGN_CENTER);
107   display.drawString(64, 22, "Center aligned (64,22)");
108 
109   // The coordinates define the right end of the text
110   display.setTextAlignment(TEXT_ALIGN_RIGHT);
111   display.drawString(128, 33, "Right aligned (128,33)");
112 }
113 
114 void drawRectDemo() {
115       // Draw a pixel at given position
116     for (int i = 0; i < 10; i++) {
117       display.setPixel(i, i);
118       display.setPixel(10 - i, i);
119     }
120     display.drawRect(12, 12, 20, 20);
121 
122     // Fill the rectangle
123     display.fillRect(14, 14, 17, 17);
124 
125     // Draw a line horizontally
126     display.drawHorizontalLine(0, 40, 20);
127 
128     // Draw a line horizontally
129     display.drawVerticalLine(40, 0, 20);
130 }
131 
132 void drawCircleDemo() {
133   for (int i=1; i < 8; i++) {
134     display.setColor(WHITE);
135     display.drawCircle(32, 32, i*3);
136     if (i % 2 == 0) {
137       display.setColor(BLACK);
138     }
139     display.fillCircle(96, 32, 32 - i* 3);
140   }
141 }
142 
143 void drawProgressBarDemo() {
144   int progress = (counter / 5) % 100;
145   // draw the progress bar
146   display.drawProgressBar(0, 32, 120, 10, progress);
147 
148   // draw the percentage as String
149   display.setTextAlignment(TEXT_ALIGN_CENTER);
150   display.drawString(64, 15, String(progress) + "%");
151 }
152 
153 void drawImageDemo() {
154     // see http://blog.squix.org/2015/05/esp8266-nodemcu-how-to-create-xbm.html
155     // on how to create xbm files
156     display.drawXbm(i-50, 16, WiFi_Logo_width, WiFi_Logo_height, WiFi_Logo_bits);
157     delay(50);
158     i = i+1;
159     a = a+2;
160     if (i>178){
161       i=0;
162       }
163       if (a>100){
164         a = 0;
165       }
166 }
167 
168 Demo demos[] = {/*drawFontFaceDemo, drawTextFlowDemo, drawTextAlignmentDemo, drawRectDemo, drawCircleDemo, drawProgressBarDemo, */drawImageDemo};
169 int demoLength = (sizeof(demos) / sizeof(Demo));
170 long timeSinceLastModeSwitch = 0;
171 
172 void loop() {
173   // clear the display
174   display.clear();
175   // draw the current demo method
176   demos[demoMode]();
177 
178   display.setTextAlignment(TEXT_ALIGN_RIGHT);
179   display.drawString(10, 128, String(millis()));
180   // write the buffer to the display
181   display.display();
182 
183   if (millis() - timeSinceLastModeSwitch > DEMO_DURATION) {
184     demoMode = (demoMode + 1)  % demoLength;
185     timeSinceLastModeSwitch = millis();
186   }
187   counter++;
188   delay(10);
189 }

Code à ajouter sous le nom de "image.h"

 1 #define WiFi_Logo_width 48
 2 #define WiFi_Logo_height 48
 3 const char WiFi_Logo_bits[] PROGMEM = {  
 4   0x00, 0x00, 0xFC, 0x3F, 0x00, 0x00, 0x00, 0x80, 0xFF, 0xFF, 0x01, 0x00, 
 5   0x00, 0xE0, 0xFF, 0xFF, 0x07, 0x00, 0x00, 0xF8, 0xBF, 0xFF, 0x1F, 0x00, 
 6   0x00, 0xFC, 0xC3, 0xC3, 0x3F, 0x00, 0x00, 0x7F, 0x20, 0x04, 0xFE, 0x00, 
 7   0x80, 0x1F, 0x10, 0x08, 0xF8, 0x01, 0xC0, 0x0F, 0x10, 0x08, 0xF0, 0x03, 
 8   0xE0, 0x07, 0x08, 0x18, 0xE0, 0x07, 0xE0, 0xFF, 0x08, 0x10, 0xFF, 0x07, 
 9   0xF0, 0x83, 0x8B, 0xD1, 0xC1, 0x0F, 0xF8, 0x00, 0xEE, 0x77, 0x40, 0x1F, 
10   0x78, 0x02, 0xF8, 0x1F, 0xC0, 0x1E, 0x3C, 0x02, 0xF0, 0x0F, 0x40, 0x3C, 
11   0x3C, 0x02, 0xF0, 0x0F, 0x40, 0x3C, 0x3E, 0x06, 0xF8, 0x1F, 0x60, 0x78, 
12   0x1E, 0x04, 0xF8, 0x1F, 0x20, 0x78, 0x1E, 0x0C, 0xFF, 0xFF, 0x20, 0x78, 
13   0x0F, 0xF8, 0xFD, 0x3F, 0x1F, 0xF0, 0x0F, 0x1F, 0xFC, 0x3F, 0xF8, 0xF0, 
14   0xCF, 0x10, 0xFC, 0x3F, 0x08, 0xF3, 0x3F, 0x20, 0xFE, 0x7F, 0x04, 0xFC, 
15   0x1F, 0x40, 0xFF, 0xBF, 0x06, 0xF8, 0x0F, 0xC0, 0xFE, 0x7F, 0x03, 0xF0, 
16   0x0F, 0xC0, 0xFE, 0x7F, 0x03, 0xF0, 0x1F, 0x40, 0xFF, 0xFF, 0x06, 0xF8, 
17   0x2F, 0xA0, 0xFF, 0xFF, 0x05, 0xF6, 0xCF, 0x91, 0xFF, 0xFF, 0x89, 0xF3, 
18   0x0F, 0xDF, 0xFF, 0xFF, 0xFB, 0xF0, 0x1F, 0xF8, 0xFF, 0xFF, 0x1F, 0xF0, 
19   0x1E, 0xCC, 0xFF, 0xFF, 0x23, 0x78, 0x1E, 0xC4, 0xFF, 0xFF, 0x23, 0x78, 
20   0x1E, 0xC6, 0xFF, 0xFF, 0x63, 0x78, 0x3C, 0xC2, 0xFB, 0x9F, 0x47, 0x3C, 
21   0x7C, 0xC2, 0xE3, 0x87, 0x43, 0x3C, 0x78, 0xC2, 0xD9, 0x9B, 0x47, 0x1E, 
22   0xF8, 0xC2, 0x8F, 0xF1, 0xC3, 0x1F, 0xF0, 0xC3, 0x8B, 0xD1, 0xC3, 0x0F, 
23   0xE0, 0xFF, 0x08, 0x10, 0xFF, 0x07, 0xC0, 0x17, 0x18, 0x18, 0xE8, 0x03, 
24   0xC0, 0x0F, 0x10, 0x08, 0xF0, 0x03, 0x00, 0x1F, 0x10, 0x08, 0xF8, 0x01, 
25   0x00, 0x7E, 0x20, 0x04, 0x7E, 0x00, 0x00, 0xFC, 0xC3, 0xC3, 0x3F, 0x00, 
26   0x00, 0xF8, 0xFF, 0xFF, 0x1F, 0x00, 0x00, 0xE0, 0xFF, 0xFF, 0x07, 0x00, 
27   0x00, 0x80, 0xFF, 0xFF, 0x01, 0x00, 0x00, 0x00, 0xF8, 0x1F, 0x00, 0x00, 
28   };

Et voici le code de l'image du logo du Science Hack Day

 1 #define WiFi_Logo_width 48
 2 #define WiFi_Logo_height 48
 3 const char WiFi_Logo_bits[] PROGMEM = {  
 4   0x00, 0x00, 0xFC, 0x3F, 0x00, 0x00, 0x00, 0x80, 0xFF, 0xFF, 0x01, 0x00, 
 5   0x00, 0xE0, 0xFF, 0xFF, 0x07, 0x00, 0x00, 0xF8, 0xBF, 0xFF, 0x1F, 0x00, 
 6   0x00, 0xFC, 0xC3, 0xC3, 0x3F, 0x00, 0x00, 0x7F, 0x20, 0x04, 0xFE, 0x00, 
 7   0x80, 0x1F, 0x10, 0x08, 0xF8, 0x01, 0xC0, 0x0F, 0x10, 0x08, 0xF0, 0x03, 
 8   0xE0, 0x07, 0x08, 0x18, 0xE0, 0x07, 0xE0, 0xFF, 0x08, 0x10, 0xFF, 0x07, 
 9   0xF0, 0x83, 0x8B, 0xD1, 0xC1, 0x0F, 0xF8, 0x00, 0xEE, 0x77, 0x40, 0x1F, 
10   0x78, 0x02, 0xF8, 0x1F, 0xC0, 0x1E, 0x3C, 0x02, 0xF0, 0x0F, 0x40, 0x3C, 
11   0x3C, 0x02, 0xF0, 0x0F, 0x40, 0x3C, 0x3E, 0x06, 0xF8, 0x1F, 0x60, 0x78, 
12   0x1E, 0x04, 0xF8, 0x1F, 0x20, 0x78, 0x1E, 0x0C, 0xFF, 0xFF, 0x20, 0x78, 
13   0x0F, 0xF8, 0xFD, 0x3F, 0x1F, 0xF0, 0x0F, 0x1F, 0xFC, 0x3F, 0xF8, 0xF0, 
14   0xCF, 0x10, 0xFC, 0x3F, 0x08, 0xF3, 0x3F, 0x20, 0xFE, 0x7F, 0x04, 0xFC, 
15   0x1F, 0x40, 0xFF, 0xBF, 0x06, 0xF8, 0x0F, 0xC0, 0xFE, 0x7F, 0x03, 0xF0, 
16   0x0F, 0xC0, 0xFE, 0x7F, 0x03, 0xF0, 0x1F, 0x40, 0xFF, 0xFF, 0x06, 0xF8, 
17   0x2F, 0xA0, 0xFF, 0xFF, 0x05, 0xF6, 0xCF, 0x91, 0xFF, 0xFF, 0x89, 0xF3, 
18   0x0F, 0xDF, 0xFF, 0xFF, 0xFB, 0xF0, 0x1F, 0xF8, 0xFF, 0xFF, 0x1F, 0xF0, 
19   0x1E, 0xCC, 0xFF, 0xFF, 0x23, 0x78, 0x1E, 0xC4, 0xFF, 0xFF, 0x23, 0x78, 
20   0x1E, 0xC6, 0xFF, 0xFF, 0x63, 0x78, 0x3C, 0xC2, 0xFB, 0x9F, 0x47, 0x3C, 
21   0x7C, 0xC2, 0xE3, 0x87, 0x43, 0x3C, 0x78, 0xC2, 0xD9, 0x9B, 0x47, 0x1E, 
22   0xF8, 0xC2, 0x8F, 0xF1, 0xC3, 0x1F, 0xF0, 0xC3, 0x8B, 0xD1, 0xC3, 0x0F, 
23   0xE0, 0xFF, 0x08, 0x10, 0xFF, 0x07, 0xC0, 0x17, 0x18, 0x18, 0xE8, 0x03, 
24   0xC0, 0x0F, 0x10, 0x08, 0xF0, 0x03, 0x00, 0x1F, 0x10, 0x08, 0xF8, 0x01, 
25   0x00, 0x7E, 0x20, 0x04, 0x7E, 0x00, 0x00, 0xFC, 0xC3, 0xC3, 0x3F, 0x00, 
26   0x00, 0xF8, 0xFF, 0xFF, 0x1F, 0x00, 0x00, 0xE0, 0xFF, 0xFF, 0x07, 0x00, 
27   0x00, 0x80, 0xFF, 0xFF, 0x01, 0x00, 0x00, 0x00, 0xF8, 0x1F, 0x00, 0x00, 
28   };