chris stevens / 4spi_oled_ssd1305

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

Dependents:   univision_oled

Fork of spk_oled_ssd1305 by Toby Harris

OLED driver and demo for Univision oled display 128x64.

/media/uploads/pegcjs/_scaled_20130128_133126.jpg

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.

/media/uploads/pegcjs/_scaled_layout.jpg

Here is the output of the demo code.

/media/uploads/pegcjs/_scaled_itworks.jpg.jpg

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

Last commit 29 Jan 2013 by chris stevens

#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);
        }
    }


}

spk_oled_screenByteMaker--processing.h

Committer:
tobyspark
Date:
2012-04-15
Revision:
2:8187d69071f8
Parent:
1:dd3faa2ab1dd
Child:
3:ade83210ecf6

File content as of revision 2:8187d69071f8:

// OLED display using SSD1305 driver
// Copyright *spark audio-visual 2012
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License version 3 as published by the Free Software Foundation.

int w = 132;
int h = 64;
int scaleFactor = 10;

PImage imgPixel;
color white = color(255, 255, 255, 255);
color black = color(0, 0, 0, 255);

void setup()
{
  size(w*scaleFactor, h*scaleFactor);
  imgPixel = loadImage("spk_dvimxr_screen.png");

  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()
{
  println("{");
  for (int page = 0; page < 8; page++)
  {
    for (int i = 0; i < w; i++)
    {
      byte theByte = 0;
      for (int j = 0; j < 8; j++)
      {
       if (imgPixel.get(i, (page*8)+j) == white)
       {
          theByte += pow(2, j); 
       }
      }
      print("0x" + hex(theByte, 2));
      print(", ");
    }
    println();
  }
  println("}");
}