问题描述
我购买的液晶显示器不起作用，我也不知道为什么！当我上传代码时，显示屏只是亮起，但没有显示任何东西！有帮助吗？
我的LCD型号：具有I2C（16x2）Like this one here的1602A
地址：0x27（使用I2C扫描代码检查）
代码：
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2); // set the LCD address to 0x27 for a 16 chars and 2 line display
void setup() {
lcd.begin(); // initialize the lcd
// Print a message to the LCD.
lcd.backlight();
lcd.setCursor(1,0);
lcd.print("hello everyone");
lcd.setCursor(1,1);
lcd.print("I am Giga Blitz");
}
void loop() {
}
示意图： Click here to view the image
解决方法
如果您使用的是i2c，请在打开LCD程序的情况下，用螺丝起子慢慢打开i2c中的蓝色螺丝。我希望它在您转动螺丝时显示出来。这对我有用
,我认为这是因为您使用的是var audio_player = $("#audio-player");
var play_button = $('#play');
var progress_bar = $("#progressbar");
var time = $("#time");
var mute_button = $('#mute');
var volume_bar = $('#volume');
var more_info = $('#more-info-box');
var info_tray = $("#info-tray");
var player = document.getElementById('player');
var duration = 0;
var volume = 0.75;
player.onloadedmetadata = function() {
duration = player.duration;
progress_bar.progressbar("option",{
'max': duration
});
};
player.load();
player.volume = 0.75;
player.addEventListener("timeupdate",function() {
progress_bar.progressbar('value',player.currentTime);
time.text(getTime(player.currentTime));
},false);
function getTime(t) {
var m = ~~(t / 60),s = ~~(t % 60);
return (m < 10 ? "0" + m : m) + ':' + (s < 10 ? "0" + s : s);
}
function getProgressBarClickInfo(progress_bar,e) {
var offset = progress_bar.position();
var x = e.pageX - offset.left; // or e.offsetX (less support,though)
var y = e.pageY - offset.top; // or e.offsetY
var max = progress_bar.progressbar("option","max");
var value = x * max / progress_bar.width();
return {
x: x,y: y,max: max,value: value
};
}
volume_bar.progressbar({
value: player.volume * 100,});
volume_bar.click(function(e) {
var info = getProgressBarClickInfo($(this),e);
volume_bar.progressbar('value',info.value);
player.volume = info.value / info.max;
});
progress_bar.progressbar({
value: player.currentTime,});
progress_bar.click(function(e) {
var info = getProgressBarClickInfo($(this),e);
player.currentTime = player.duration / info.max * info.value;
});
play_button.click(function() {
player[player.paused ? 'play' : 'pause']();
$(this).toggleClass("fa-pause",!player.paused);
$(this).toggleClass("fa-play",player.paused);
});
mute_button.click(function() {
if (player.volume == 0) {
player.volume = volume;
} else {
volume = player.volume;
player.volume = 0;
}
volume_bar.progressbar('value',player.volume * 100);
$(this).toggleClass("fa-volume-up",player.volume != 0);
$(this).toggleClass("fa-volume-off",player.volume == 0);
});
more_info.click(function() {
audio_player.animate({
height: (audio_player.height() == 50) ? 100 : 50
},1000);
});
而不是lcd.begin；
以下是指南：https://create.arduino.cc/projecthub/Oniichan_is_ded/lcd-i2c-tutorial-664e5a
lcd.init()