Video:
Parts required:
- Arduino UNO or compatible board such as the Freetronics Eleven
- Seeed Studio's Grove OLED display 96x96
- Seeed Studio's Grove Base Shield
- Seeed Studio's Grove Universal Cables
Software required:
- Arduino IDE version 023 - later versions are NOT supported (at the time of this writing)
- Processing IDE
- Seeed Studio's Gray OLED Library - unzip these files and copy them into the Arduino Library folder
Sketch:
Arduino Sketch:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | // OLED Slideshow: Arduino Sketch written by ScottC 21/07/2012 #include <Wire.h> #include <SeeedGrayOLED.h> //From http://garden.seeedstudio.com/images/c/c4/SeeedGrayOLED.zip #include <avr/pgmspace.h> int counter=0; void setup() { //Allow communication to OLED Wire.begin(); //Allow Serial communication between Freetronics Eleven and Computer Serial.begin(28800); //Initialise the OLED SeeedGrayOled.init(); //Clear the OLED display SeeedGrayOled.clearDisplay(); //Set to vertical mode - horizontal mode doesn't work with this example SeeedGrayOled.setVerticalMode(); } void loop(){ //Listen for Serial comunication while (Serial.available()>0) { // Read data and send directly to the OLED sendMyData(Serial.read()); counter++; //When counter reaches 4608 pixels, the picture is complete. if(counter>4607){ //Insert delay to allow viewing of picture. delay(4000); Serial.println("End of Transmission"); //Reset the counter for the next picture counter=0; } } } // This function was adapted from the SEEED Gray OLED driver so that // character bytes could be sent directly to the OLED. void sendMyData(unsigned char Data){ Wire.beginTransmission(SeeedGrayOLED_Address); // begin I2C transmission Wire.send(SeeedGrayOLED_Data_Mode); // data mode Wire.send(Data); Wire.endTransmission(); } // This function was adapted from the SEEED Gray OLED driver so that // commands could be sent directly to the OLED. // NOT USED IN THIS EXAMPLE *********************** void sendMyCommand(unsigned char Cmd){ Wire.beginTransmission(SeeedGrayOLED_Address); // begin I2C communication Wire.send(SeeedGrayOLED_Command_Mode); // Set OLED Command mode Wire.send(Cmd); Wire.endTransmission(); // End I2C communication } |
Processing Sketch:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | /* OLED Slideshow: Processing Sketch Written by ScottC 21/7/2012 References: Getting Pixels: http://www.learningprocessing.com/examples/chapter-15/example-15-7/ Greyscale conversion = http://www.openprocessing.org/sketch/60336 */ import processing.serial.*; /* Needed for Serial Communication */ /* Global variables */ Serial comPort; String [] comPortList; String comPortString; PImage img; char[] tempGrey=new char[4609]; int startOffset=0; ArrayList picNames; int curLoop=1; int totalPics=0; int curPicNum=0; boolean toggleSend=true; boolean sendBouncer=true; //Change maxLoops to a number > 1 if you want the pictures to loop. int maxLoops=1; void setup() { //The size of the display is critical (must match the OLED) size(96, 96); //setup Serial comPortList = Serial.list(); if(comPortList.length>0){ //baud rates greater than 28800 may produce unexpected results comPort = new Serial(this, comPortList[0], 28800); comPort.bufferUntil('\n'); } else{ println("NO COM PORTS AVAILABLE"); } //Create an Array of pictures picNames=new ArrayList(); picNames.add("Picture1.bmp"); picNames.add("Picture2.bmp"); picNames.add("Picture3.bmp"); picNames.add("Picture4.bmp"); // for more pictures just keep adding them to the list. //The actual pictures must be located in the data folder of this project. //Select Sketch/Add File to add the files to this folder. //Make sure that the name of pictures match the names above. //Get the total number of pictures added totalPics=picNames.size(); } void draw(){ if(toggleSend && sendBouncer){ // Debugging code: print("STARTED:"); // Debugging code: println(picNames.get(curPicNum)); sendImage((String)picNames.get(curPicNum)); //Send the picture to the OLED toggleSend=false; //temporarily stop sending any more pictures until authorised curPicNum++; //increment in preparation for the next picture if(curPicNum==totalPics){ curPicNum=0; //go back to the first picture curLoop++; //increment the loop counter } if(curLoop>maxLoops){ sendBouncer=false; //Stop any further looping println("ANIMATION COMPLETE"); } } } void sendImage(String imgName){ img = loadImage(imgName); image(img,0,0,width,height); loadPixels(); int counter=0; for (int x = 0; x < width; x=x+2) { for (int y = 0; y < height; y++) { counter++; int PixLoc = x + y*height; // this reads down then across2. //Left pixel nibble int Pix1=(round((red(pixels[PixLoc])*0.222+green(pixels[PixLoc])*0.707+blue(pixels[PixLoc])*0.071)))/16; //Right pixel nibble int Pix2=(round((red(pixels[PixLoc+1])*0.222+green(pixels[PixLoc+1])*0.707+blue(pixels[PixLoc+1])*0.071)))/16; //Shift the byte <<4 for the left pixel nibble int PixShift1=Pix1<<4; //Combine both nibbles to form a byte int PixFin = PixShift1+Pix2; byte PixByteFin=byte(PixFin); //Assign this byte to the tempGrey array tempGrey[counter] = char(PixByteFin); } } sendSerial(tempGrey); //Send the image data through the Serial COM Port/ } //This function will send the byte/Char array to the Freetronics //Eleven or Arduino. void sendSerial(char[] Data){ for(int i=0; i<4608; i++){ //Needs an offset to get picture to align to screen properly //only needs to do this once. if(startOffset==0){ i=i+6; startOffset++; } //Send the picture data to the Freetronics Eleven / Arduino comPort.write(Data[i]); } } //This function will wait for a response from the Freetronics //Eleven or Arduino before sending any further pictures. void serialEvent (Serial myPort) { // get the ASCII string: String inString = myPort.readStringUntil('\n'); if (inString != null) { println(inString); toggleSend=true; // Allow the next picture to be sent } } |
Please note: that you must use the Arduino IDE version 023 until Seeed Studio update their driver for this OLED. Their current driver is not compatible with later versions of Arduino IDE.