SPKDisplay - A mbed display class and processing imaging tools for 128x64 OLEDs using the SSD1305 driver, connected via SPI. This variant drives a Unigraphics oled on the same driver but in page mode. Includes a simple 5x7 ascii font
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OLED driver and demo for Univision oled display 128x64.
Modified Toby Harris' code to run page mode addressing in 4 wire SPI on the Univision UG-2864HSWEG01 128X64 unit - often found for sale on ebay. That's where I got mine anyhow.
Wiring this was fairly straightforward but you really do have to ground all the unused pins EXCEPT for number 8 to get it to work.
Here's the layout - I made a little carrier using a 2x8 connector and a couple of headers mounted on a small piece of stripboard. You can see all the wire links that are used to ground the unused pins. It was pretty awkward setting the display to run in 4 wire spi - had to desolder and resolder three smd o ohm links on the back o fhte pcb - ended up using a microscope to see them.
Here is the output of the demo code.
In page mode the display is effectively divided up into 8 horizontal strips, each 8 pixels high so lends itself nicley to displaying text in a 5x7 font. I've included the 5x7 lcd font in the code below.
Code
Import programunivision_oled
driver demo for univision oled dispaly
#include "mbed.h" #include "4spi_oled_ssd1305.h" /* re writtten to cope with teh ssd1306 driven oled UG-2864HSWEG01 from univision wiring for test circuit OLED pins -FUNCTION-------MBED PINns 1 ----3.3V--- Vout (p40) 2 ----0.0V--- GND (p1) 3 ----------- GND (p1) 4 ----------- GND (p1) 5 ----------- GND (p1) 6 ----------- GND (p1) 7 ----------- GND (p1) 8 ----------- N/C 9 ----D1---- mosi (p5) 10 ---D0------sck(p7) 11 ----------- GND (p1) 12 ----------- GND (p1) 13 ---DC------ p10 14 ---RES----- p9 15 ---CS------ p8 */ DigitalOut myled(LED1); // Create object and load font //SPKDisplay( mosiPin, clkPin, csPin, dcPin, resPin, Serial *debugSerial) SPKDisplay screen(p5, p7, p8, p10, p9); int main() { char msg[22]; sprintf(msg," "); // 01234567890abcdefghij int i=0; while(1==1) { myled=1; // nice logo output screen.welcome(); wait(3); wait(2); for(i=0; i<5; i++) { myled=0; screen.inverse(); wait(1); screen.normal(); myled=1; wait(1); } screen.fontdemo(); myled=0; wait(5); screen.clearBuffer(); screen.sendBuffer(); myled=1; wait(0.5); myled=0; wait(0.5); for(i=0; i<8; i++) { sprintf(msg,"HELLO WORLD %d",i); screen.textToBuffer(msg, i); screen.sendBuffer(); screen.clearBuffer(); myled=1; wait(1); } } }
Diff: spk_oled_fontByteMaker--processing.h
- Revision:
- 1:dd3faa2ab1dd
- Parent:
- 0:76bb084fa033
- Child:
- 2:8187d69071f8
--- a/spk_oled_fontByteMaker--processing.h Sun Apr 15 16:51:01 2012 +0000 +++ b/spk_oled_fontByteMaker--processing.h Sun Apr 15 19:39:17 2012 +0000 @@ -1,95 +1,95 @@ -int w = 132; -int h = 64; -int scaleFactor = 5; - -PImage imgPixel; -color white = color(255, 255, 255, 255); -color black = color(0, 0, 0, 255); - -void setup() -{ - imgPixel = loadImage("spk_dvimxr_font.png"); - w = imgPixel.width; - h = imgPixel.height; - - size(w*scaleFactor, h*scaleFactor); - - noSmooth(); -} - -void draw() -{ - background(0); - image(imgPixel, 0, 0, w*scaleFactor, h*scaleFactor); -} - -void mouseDragged() -{ - int x = mouseX/scaleFactor; - int y = mouseY/scaleFactor; - - imgPixel.set(x, y, white); -} - -void mousePressed() -{ - int x = mouseX/scaleFactor; - int y = mouseY/scaleFactor; - - if (imgPixel.get(x, y) == white) - { - imgPixel.set(x, y, black); - } - else - { - imgPixel.set(x, y, white); - } -} - -void keyPressed() -{ - int startID = 33; - int stopID = 126; - - for (int charID = startID; charID <= stopID; charID++) - { - boolean blank = false; - String output = ""; - int counter = 0; - while (blank == false) - { - int x = (charID-startID)*8 + counter; - - byte theByte = 0; - for (int b = 0; b < 8; b++) - { - if (imgPixel.get(x, b) == white) - { - theByte += pow(2, b); - } - } - - if (theByte > 0) - { - if (output.length() > 0) output = output + ", "; - output = output + "0x" + hex(theByte, 2); - } - else - { - blank = true; - println("const uint8_t char" + charID + "[] = {" + counter + ", " + output + "};"); - } - - counter++; - } - } - println(); - println("const int characterBytesStartChar = " + startID + ";"); - println("const int characterBytesEndChar = " + stopID + ";"); - print("const uint8_t* characterBytes[] = {"); - for (int charID = startID; charID <= stopID; charID++) - { - print("char" + charID + ", "); - } - println("};"); -} +int w = 132; +int h = 64; +int scaleFactor = 5; + +PImage imgPixel; +color white = color(255, 255, 255, 255); +color black = color(0, 0, 0, 255); + +void setup() +{ + imgPixel = loadImage("spk_dvimxr_font.png"); + w = imgPixel.width; + h = imgPixel.height; + + size(w*scaleFactor, h*scaleFactor); + + noSmooth(); +} + +void draw() +{ + background(0); + image(imgPixel, 0, 0, w*scaleFactor, h*scaleFactor); +} + +void mouseDragged() +{ + int x = mouseX/scaleFactor; + int y = mouseY/scaleFactor; + + imgPixel.set(x, y, white); +} + +void mousePressed() +{ + int x = mouseX/scaleFactor; + int y = mouseY/scaleFactor; + + if (imgPixel.get(x, y) == white) + { + imgPixel.set(x, y, black); + } + else + { + imgPixel.set(x, y, white); + } +} + +void keyPressed() +{ + int startID = 33; + int stopID = 126; + + for (int charID = startID; charID <= stopID; charID++) + { + boolean blank = false; + String output = ""; + int counter = 0; + while (blank == false) + { + int x = (charID-startID)*8 + counter; + + byte theByte = 0; + for (int b = 0; b < 8; b++) + { + if (imgPixel.get(x, b) == white) + { + theByte += pow(2, b); + } + } + + if (theByte > 0) + { + if (output.length() > 0) output = output + ", "; + output = output + "0x" + hex(theByte, 2); + } + else + { + blank = true; + println("const uint8_t char" + charID + "[] = {" + counter + ", " + output + "};"); + } + + counter++; + } + } + println(); + println("const int characterBytesStartChar = " + startID + ";"); + println("const int characterBytesEndChar = " + stopID + ";"); + print("const uint8_t* characterBytes[] = {"); + for (int charID = startID; charID <= stopID; charID++) + { + print("char" + charID + ", "); + } + println("};"); +}