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Version du 26 juillet 2014 à 16:23
Next we will demonstrate how to send text and commands using an Arduino microcontroller. You can of course use any microcontroller that has a serial output you can configure for 9600 baud. This demo will show how to set the display size, RGB backlight and create a custom character. For more commands, see below for the full list of supported commands
Grab an Arduino and connect the JST cable to the backpack as follows: Red wire goes to +5V, Black wire goes to Ground, White data wire goes to digital #2. You can change the digital pin later, but stick with #2 for this example and adjust later as desired.
#include <SoftwareSerial.h> // Create a software serial port! SoftwareSerial lcd = SoftwareSerial(0,2); void setup() { lcd.begin(9600); // set the size of the display if it isn't 16x2 (you only have to do this once) lcd.write(0xFE); lcd.write(0xD1); lcd.write(16); // 16 columns lcd.write(2); // 2 rows delay(10); // we suggest putting delays after each command to make sure the data // is sent and the LCD is updated. // set the contrast, 200 is a good place to start, adjust as desired lcd.write(0xFE); lcd.write(0x50); lcd.write(200); delay(10); // set the brightness - we'll max it (255 is max brightness) lcd.write(0xFE); lcd.write(0x99); lcd.write(255); delay(10); // turn off cursors lcd.write(0xFE); lcd.write(0x4B); lcd.write(0xFE); lcd.write(0x54); // create a custom character lcd.write(0xFE); lcd.write(0x4E); lcd.write((uint8_t)0); // location #0 lcd.write((uint8_t)0x00); // 8 bytes of character data lcd.write(0x0A); lcd.write(0x15); lcd.write(0x11); lcd.write(0x11); lcd.write(0x0A); lcd.write(0x04); lcd.write((uint8_t)0x00); delay(10); // we suggest putting delays after each command // clear screen lcd.write(0xFE); lcd.write(0x58); delay(10); // we suggest putting delays after each command // go 'home' lcd.write(0xFE); lcd.write(0x48); delay(10); // we suggest putting delays after each command lcd.print("We "); lcd.write((uint8_t)0); // to print the custom character, 'write' the location lcd.println(" Arduino!"); lcd.print(" - Adafruit"); delay(1000); } uint8_t red, green, blue; void loop() { // adjust colors for (red = 0; red < 255; red++) { lcd.write(0xFE); lcd.write(0xD0); lcd.write(red); lcd.write((uint8_t)0); lcd.write(255 - red); delay(10); // give it some time to adjust the backlight! } for (green = 0; green < 255; green++) { lcd.write(0xFE); lcd.write(0xD0); lcd.write(255-green); lcd.write(green); lcd.write((uint8_t)0); delay(10); // give it some time to adjust the backlight! } for (blue = 0; blue < 255; blue++) { lcd.write(0xFE); lcd.write(0xD0); lcd.write((uint8_t)0); lcd.write(255-blue); lcd.write(blue); delay(10); // give it some time to adjust the backlight! } }
You should see the following, with a color-changing background:
Crédit: AdaFruit Industries www.adafruit.com
Tutoriel USB + Serial RGB Backlight Character LCD Backpack créé par Tyler Cooper pour AdaFruit Industries.
Tutoriel traduit et augmenté par Meurisse D. pour MCHobby.be
Traduit avec l'autorisation d'AdaFruit Industries - Translated with the permission from Adafruit Industries - www.adafruit.com
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