在树莓派使用Nokia5110显示屏显示系统信息中，学习了使用树莓派驱动Nokia5110显示屏。本篇文章教大家用Arduino驱动Nokia5110显示屏。

一、硬件连接

#define PIN_SCE                 7
#define PIN_RESET             6
#define PIN_DC             5
#define PIN_SDIN            4
#define PIN_SCLK                3
VCC         3.3V
Gng            地
BL            5V

在BL和5V之间连接不用加入其他的电阻和电容，经过我的测试，直接连接就可以了。

二、下载Nokia5110驱动库

1、下载Arduino Nokia5110 驱动库.（科技爱好者博客下载：pcd8544-master）

2、打开Arduino IDE

3、“项目” – “加载库” -” 添加一个.zip库”。

三、运行程序

选择File > Examples > PCD8544 > HelloWorld打开Nokia 5110屏幕测试程序。编译下载即可看到显示的信息。

四、Hello Word程序代码

 
/*
 * PCD8544 - Interface with Philips PCD8544 (or compatible) LCDs.
 *
 * Copyright (c) 2010 Carlos Rodrigues <cefrodrigues@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/*
 * To use this sketch, connect the eight pins from your LCD like thus:
 *
 * Pin 1 -> +3.3V (rightmost, when facing the display head-on)
 * Pin 2 -> Arduino digital pin 3
 * Pin 3 -> Arduino digital pin 4
 * Pin 4 -> Arduino digital pin 5
 * Pin 5 -> Arduino digital pin 7
 * Pin 6 -> Ground
 * Pin 7 -> 10uF capacitor -> Ground
 * Pin 8 -> Arduino digital pin 6
 *
 * Since these LCDs are +3.3V devices, you have to add extra components to
 * connect it to the digital pins of the Arduino (not necessary if you are
 * using a 3.3V variant of the Arduino, such as Sparkfun's Arduino Pro).
 */


#include 

// A custom glyph (a smiley)...
static const byte glyph[] = { B00010000, B00110100, B00110000, B00110100, B00010000 };


static PCD8544 lcd;


void setup() {
  // PCD8544-compatible displays may have a different resolution...
  lcd.begin(84, 48);

  // Add the smiley to position "0" of the ASCII table...
  lcd.createChar(0, glyph);
}


void loop() {
  // Just to show the program is alive...
  static int counter = 0;

  // Write a piece of text on the first line...
  lcd.setCursor(0, 0);
  lcd.print("Hello, World!");

  lcd.setCursor(0, 1);
  lcd.print("Blog.tujing.site");
  
  // Write the counter on the second line...
  lcd.setCursor(0, 3            );
  lcd.print(counter, DEC);
  lcd.write(' ');
  lcd.write(0);  // write the smiley

  
  // Use a potentiometer to set the LCD contrast...
  // short level = map(analogRead(A0), 0, 1023, 0, 127);
  // lcd.setContrast(level);

  delay(100);
  counter+=1;
}


/* EOF - HelloWorld.ino */

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