chris stevens
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
Fork of
spk_oled_ssd1305
by 
Toby Harris
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
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);
}
}
}
Diff: spk_oled_screenByteMaker--processing.h
- Revision:
- 0:76bb084fa033
- Child:
- 1:dd3faa2ab1dd
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/spk_oled_screenByteMaker--processing.h Sun Apr 15 16:51:01 2012 +0000
@@ -0,0 +1,67 @@
+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("}");
+}