arduino+oled测试实验

一、连线
针脚说明

VCC 接3.3v电源

GND 接地（GND）

SCL 时钟线

SDA 数据线

接线图

二、下载测试代码

在上代码之前，先下载两个库分别是

Adafruit SSD1306 Library:

http://download.csdn.net/download/qq_24397253/9969004

Adafruit GFX Library:

http://download.csdn.net/download/qq_24397253/9967474

下载后把解压的文件放在 Arduino 安装目录里的 "libraries"

例如：C:\Program Files (x86)\Arduino\libraries

调出示例程序



或者复制以下代码，都是一样的：

[objc] view
plain copy

/*********************************************************************

This is an example for our Monochrome OLEDs based on SSD1306 drivers

Pick one up today in the adafruit shop!

------> http://www.adafruit.com/category/63_98
This example is for a 128x64 size display using I2C to communicate

3 pins are required to interface (2 I2C and one reset)

Adafruit invests time and resources providing this open source code,

please support Adafruit and open-source hardware by purchasing

products from Adafruit!

Written by Limor Fried/Ladyada for Adafruit Industries.

BSD license, check license.txt for more information

All text above, and the splash screen must be included in any redistribution

*********************************************************************/

#include <SPI.h>

#include <Wire.h>

#include <Adafruit_GFX.h>

#include <Adafruit_SSD1306.h>

#define OLED_RESET 4

Adafruit_SSD1306 display(OLED_RESET);

#define NUMFLAKES 10

#define XPOS 0

#define YPOS 1

#define DELTAY 2

#define LOGO16_GLCD_HEIGHT 16

#define LOGO16_GLCD_WIDTH 16

static const unsigned char PROGMEM logo16_glcd_bmp[] =

{ B00000000, B11000000,

B00000001, B11000000,

B00000001, B11000000,

B00000011, B11100000,

B11110011, B11100000,

B11111110, B11111000,

B01111110, B11111111,

B00110011, B10011111,

B00011111, B11111100,

B00001101, B01110000,

B00011011, B10100000,

B00111111, B11100000,

B00111111, B11110000,

B01111100, B11110000,

B01110000, B01110000,

B00000000, B00110000 };

#if (SSD1306_LCDHEIGHT != 64)

#error("Height incorrect, please fix Adafruit_SSD1306.h!");

#endif

void setup() {

Serial.begin(9600);

// by default, we'll generate the high voltage from the 3.3v line internally! (neat!)

display.begin(SSD1306_SWITCHCAPVCC, 0x3D); // initialize with the I2C addr 0x3D (for the 128x64)

// init done

// Show image buffer on the display hardware.

// Since the buffer is intialized with an Adafruit splashscreen

// internally, this will display the splashscreen.

display.display();

delay(2000);

// Clear the buffer.

display.clearDisplay();

// draw a single pixel

display.drawPixel(10, 10, WHITE);

// Show the display buffer on the hardware.

// NOTE: You _must_ call display after making any drawing commands

// to make them visible on the display hardware!

display.display();

delay(2000);

display.clearDisplay();

// draw many lines

testdrawline();

display.display();

delay(2000);

display.clearDisplay();

// draw rectangles

testdrawrect();

display.display();

delay(2000);

display.clearDisplay();

// draw multiple rectangles

testfillrect();

display.display();

delay(2000);

display.clearDisplay();

// draw mulitple circles

testdrawcircle();

display.display();

delay(2000);

display.clearDisplay();

// draw a white circle, 10 pixel radius

display.fillCircle(display.width()/2, display.height()/2, 10, WHITE);

display.display();

delay(2000);

display.clearDisplay();

testdrawroundrect();

delay(2000);

display.clearDisplay();

testfillroundrect();

delay(2000);

display.clearDisplay();

testdrawtriangle();

delay(2000);

display.clearDisplay();

testfilltriangle();

delay(2000);

display.clearDisplay();

// draw the first ~12 characters in the font

testdrawchar();

display.display();

delay(2000);

display.clearDisplay();

// draw scrolling text

testscrolltext();

delay(2000);

display.clearDisplay();

// text display tests

display.setTextSize(1);

display.setTextColor(WHITE);

display.setCursor(0,0);

display.println("Hello, world!");

display.setTextColor(BLACK, WHITE); // 'inverted' text

display.println(3.141592);

display.setTextSize(2);

display.setTextColor(WHITE);

display.print("0x"); display.println(0xDEADBEEF, HEX);

display.display();

delay(2000);

display.clearDisplay();

// miniature bitmap display

display.drawBitmap(30, 16, logo16_glcd_bmp, 16, 16, 1);

display.display();

delay(1);

// invert the display

display.invertDisplay(true);

delay(1000);

display.invertDisplay(false);

delay(1000);

display.clearDisplay();

// draw a bitmap icon and 'animate' movement

testdrawbitmap(logo16_glcd_bmp, LOGO16_GLCD_HEIGHT, LOGO16_GLCD_WIDTH);

}

void loop() {

}

void testdrawbitmap(const uint8_t *bitmap, uint8_t w, uint8_t h) {

uint8_t icons[NUMFLAKES][3];

// initialize

for (uint8_t f=0; f< NUMFLAKES; f++) {

icons[f][XPOS] = random(display.width());

icons[f][YPOS] = 0;

icons[f][DELTAY] = random(5) + 1;

Serial.print("x: ");

Serial.print(icons[f][XPOS], DEC);

Serial.print(" y: ");

Serial.print(icons[f][YPOS], DEC);

Serial.print(" dy: ");

Serial.println(icons[f][DELTAY], DEC);

}

while (1) {

// draw each icon

for (uint8_t f=0; f< NUMFLAKES; f++) {

display.drawBitmap(icons[f][XPOS], icons[f][YPOS], bitmap, w, h, WHITE);

}

display.display();

delay(200);

// then erase it + move it

for (uint8_t f=0; f< NUMFLAKES; f++) {

display.drawBitmap(icons[f][XPOS], icons[f][YPOS], bitmap, w, h, BLACK);

// move it

icons[f][YPOS] += icons[f][DELTAY];

// if its gone, reinit

if (icons[f][YPOS] > display.height()) {

icons[f][XPOS] = random(display.width());

icons[f][YPOS] = 0;

icons[f][DELTAY] = random(5) + 1;

}

}

}

}

void testdrawchar(void) {

display.setTextSize(1);

display.setTextColor(WHITE);

display.setCursor(0,0);

for (uint8_t i=0; i < 168; i++) {

if (i == '\n') continue;

display.write(i);

if ((i > 0) && (i % 21 == 0))

display.println();

}

display.display();

delay(1);

}

void testdrawcircle(void) {

for (int16_t i=0; i<display.height(); i+=2) {

display.drawCircle(display.width()/2, display.height()/2, i, WHITE);

display.display();

delay(1);

}

}

void testfillrect(void) {

uint8_t color = 1;

for (int16_t i=0; i<display.height()/2; i+=3) {

// alternate colors

display.fillRect(i, i, display.width()-i*2, display.height()-i*2, color%2);

display.display();

delay(1);

color++;

}

}

void testdrawtriangle(void) {

for (int16_t i=0; i<min(display.width(),display.height())/2; i+=5) {

display.drawTriangle(display.width()/2, display.height()/2-i,

display.width()/2-i, display.height()/2+i,

display.width()/2+i, display.height()/2+i, WHITE);

display.display();

delay(1);

}

}

void testfilltriangle(void) {

uint8_t color = WHITE;

for (int16_t i=min(display.width(),display.height())/2; i>0; i-=5) {

display.fillTriangle(display.width()/2, display.height()/2-i,

display.width()/2-i, display.height()/2+i,

display.width()/2+i, display.height()/2+i, WHITE);

if (color == WHITE) color = BLACK;

else color = WHITE;

display.display();

delay(1);

}

}

void testdrawroundrect(void) {

for (int16_t i=0; i<display.height()/2-2; i+=2) {

display.drawRoundRect(i, i, display.width()-2*i, display.height()-2*i, display.height()/4, WHITE);

display.display();

delay(1);

}

}

void testfillroundrect(void) {

uint8_t color = WHITE;

for (int16_t i=0; i<display.height()/2-2; i+=2) {

display.fillRoundRect(i, i, display.width()-2*i, display.height()-2*i, display.height()/4, color);

if (color == WHITE) color = BLACK;

else color = WHITE;

display.display();

delay(1);

}

}

void testdrawrect(void) {

for (int16_t i=0; i<display.height()/2; i+=2) {

display.drawRect(i, i, display.width()-2*i, display.height()-2*i, WHITE);

display.display();

delay(1);

}

}

void testdrawline() {

for (int16_t i=0; i<display.width(); i+=4) {

display.drawLine(0, 0, i, display.height()-1, WHITE);

display.display();

delay(1);

}

for (int16_t i=0; i<display.height(); i+=4) {

display.drawLine(0, 0, display.width()-1, i, WHITE);

display.display();

delay(1);

}

delay(250);

display.clearDisplay();

for (int16_t i=0; i<display.width(); i+=4) {

display.drawLine(0, display.height()-1, i, 0, WHITE);

display.display();

delay(1);

}

for (int16_t i=display.height()-1; i>=0; i-=4) {

display.drawLine(0, display.height()-1, display.width()-1, i, WHITE);

display.display();

delay(1);

}

delay(250);

display.clearDisplay();

for (int16_t i=display.width()-1; i>=0; i-=4) {

display.drawLine(display.width()-1, display.height()-1, i, 0, WHITE);

display.display();

delay(1);

}

for (int16_t i=display.height()-1; i>=0; i-=4) {

display.drawLine(display.width()-1, display.height()-1, 0, i, WHITE);

display.display();

delay(1);

}

delay(250);

display.clearDisplay();

for (int16_t i=0; i<display.height(); i+=4) {

display.drawLine(display.width()-1, 0, 0, i, WHITE);

display.display();

delay(1);

}

for (int16_t i=0; i<display.width(); i+=4) {

display.drawLine(display.width()-1, 0, i, display.height()-1, WHITE);

display.display();

delay(1);

}

delay(250);

}

void testscrolltext(void) {

display.setTextSize(2);

display.setTextColor(WHITE);

display.setCursor(10,0);

display.clearDisplay();

display.println("scroll");

display.display();

delay(1);

display.startscrollright(0x00, 0x0F);

delay(2000);

display.stopscroll();

delay(1000);

display.startscrollleft(0x00, 0x0F);

delay(2000);

display.stopscroll();

delay(1000);

display.startscrolldiagright(0x00, 0x07);

delay(2000);

display.startscrolldiagleft(0x00, 0x07);

delay(2000);

display.stopscroll();

}

编译的过程，可能会遇到以下问题：

①提示错误



#error("Height incorrect, please fix Adafruit_SSD1306.h!");

错误信息意思是指：

高度不正确，请修正Adafruit_SSD1306.h！

进入Arduino安装文件夹的libraries文件夹的Adfruit_SSD1306-master 找到Adafruit_SSD1306.h



打开此文件，找到第70行左右



默认是定义 SSD1306_128_32 ，由于我们使用的是128*64的OLED，所以，把原来的#define SSD1306_128_32,前面加上//

把#define SSD_128_64 前面的//去掉

最后就如上面图例一样

②模块的IIC 地址问题

模块的地址修改在这个位置，示例程序的61行



这个模块地址我用的是这个，但每个模块可能不一样，具体请咨询购买的商家，又或者可以参考下面链接的，IIC搜索地址程序。

寻找设备地址的代码 把模块按接线方法接好，上传这段代码后，打开端口监视器，就能找到在I2C上的设备地址

#include <Wire.h>

void setup(){
Wire.begin();
Serial.begin(9600);
Serial.println("\nI2C Scanner");
}
void loop(){
byte error, address;
int nDevices;
Serial.println("Scanning...");
nDevices = 0;
for (address = 1; address < 127; address++ ){
// The i2c_scanner uses the return value of
// the Write.endTransmisstion to see if
// a device did acknowledge to the address.
Wire.beginTransmission(address);
error = Wire.endTransmission();
if (error == 0){
Serial.print("I2C device found at address 0x");
if (address < 16)
Serial.print("0");
Serial.print(address, HEX);
Serial.println(" !");
nDevices++;
}else if (error == 4){
Serial.print("Unknow error at address 0x");
if (address < 16)
Serial.print("0");
Serial.println(address, HEX);
}
}
if (nDevices == 0)
Serial.println("No I2C devices found\n");
else
Serial.println("done\n");
delay(5000); // wait 5 seconds for next scan
}

三、实验效果