Arduino Nano and SSD1322 3.12"

onkal · January 19, 2022, 1:41pm

Hello everyone,

I'm new to Arduino. I've done a few home automation related things before, but all as copy/paste youtube videos.

Now I want to add an oled display for my new dac.
What I want to do with Arduino is input selection and on/off with relay.

First of all, I want to run an oled display. But I'm not very good at electronics. I have attached pictures of the oled screen.
Which library should I use and which pins should I use? Can you help me?

ssd1322.pdf (292.2 KB)

david_prentice · January 19, 2022, 2:07pm

Your pcb is configured for 8080 interface. Which means a LOT of wires to connect.

The only library is U8g2lib. e.g. https://github.com/olikraus/u8g2/wiki/u8g2setupcpp#ssd1322-nhd_256x64

U8G2_SSD1322_NHD_256X64_1_8080(rotation, d0, d1, d2, d3, d4, d5, d6, d7, enable, cs, dc [, reset]) [page buffer, size = 256 bytes]

If you are able to use a soldering iron, 4-Wire SPI uses much fewer wires.
U8G2_SSD1322_NHD_256X64_1_4W_HW_SPI(rotation, cs, dc [, reset]) [page buffer, size = 256 bytes]

Let us know how you get on. Ask if you want detailed pin to pin help.

I am always suspicious of shops that say

especially when the datasheet says maximum logic signals as 3.5V.
The Nano has 5V logic. Mind you, most other Solomon controllers specify maximum logic voltages but appear to be input voltage tolerant.

David.

onkal · January 19, 2022, 2:24pm

Thank you for your fast answer.

Yes I can use a soldering iron.
I'm going to change it to R6 to R5; R8 to R7, right?

Would it be 8080 or 4spi that would limit my usage?

I didn't understand the last part of your message because I'm a beginner
Can't I use 3v3 and Gnd on nano for oled?

david_prentice · January 19, 2022, 2:45pm

8080 Parallel uses most of the pins on a Nano.
4-Wire SPI uses less wires.

Performance would be similar. Possibly slower with Parallel because it can use random digital pins on the Arduino.

Regarding voltages. Most displays contain their own voltage regulators e.g. U3, U4 on your pcb.
U3 and U4 will accept 5V or 3.3V. I suggest that you choose 5V from the Nano.

However 5V logic signals mean that your "high" logic is greater than the 3.3V operating voltage (from U3,U4). External chips are very fussy about signals that are higher or lower than their operating voltage. Which is why you provide level-shifter circuitry i.e. to convert 5V logic to civilised 3.3V levels.

If a chip is "input voltage tolerant" it means that a 5V high signal does no harm.
Your SSD1322 is made by Solomon Systech. The datasheet says "not tolerant" but in practice Solomon controllers seem to be ok.
Other manufacturers are less forgiving !!

David.

onkal · January 19, 2022, 5:39pm

I will change it to 4spi.
R6 -> R5; R8 -> R7
Is that enough? Do I need to do anything else?

I want to help pin to pin for 4spi.

david_prentice · January 19, 2022, 6:11pm

Display : Nano
16        D10
15        D8
14        D9
5         D11
4         D13
2         5V
1         GND

From the U8g2 examples. Start with the SW_SPI e.g.

U8G2_SSD1322_NHD_256X64_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ 8);	// Enable U8G2_16BIT in u8g2.h
//U8G2_SSD1322_NHD_256X64_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ 8);	// Enable U8G2_16BIT in u8g2.h

Then try the HW_SPI version:

//U8G2_SSD1322_NHD_256X64_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ 8);	// Enable U8G2_16BIT in u8g2.h
U8G2_SSD1322_NHD_256X64_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ 8);	// Enable U8G2_16BIT in u8g2.h

I think that the example will "work" without editing U8G2_16BIT in u8g2.h
But you will need to do the edit for all 256 pixels to work properly.

Untested. I don't have your display.

From the photo you have R6, R8 i.e. 8080
You need R5, R8 i.e. 4-SPI

So you only change R6 to R5.

David.

onkal · January 20, 2022, 7:20am

I soldered R5.

I send to nano that;

#include <Arduino.h>
#include <U8g2lib.h>
#include <SPI.h>
#include <Wire.h>

//U8G2_SSD1322_NHD_256X64_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ 8);  // Enable U8G2_16BIT in u8g2.h
U8G2_SSD1322_NHD_256X64_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ 8);  // Enable U8G2_16BIT in u8g2.h

void setup(void) {
  u8g2.begin();
}

void loop(void) {
  u8g2.firstPage();
  do {
    u8g2.setFont(u8g2_font_ncenB14_tr);
    u8g2.drawStr(0,24,"Hello World!");
  } while ( u8g2.nextPage() );
}

But lots of error;
Arduino:1.8.19 (Windows 10), Kart:"Arduino Nano, ATmega328P"

Çalışmanız programın 9508 bayt (30 %) saklama alanını kullandı. Maksimum 30720 bayt.

Global değişkenler belleğin 748 byte kadarını (36%) kullanıyor. Yerel değişkenler için 1300 byte yer kalıyor. En fazla 2048 byte kullanılabilir.