New Adafruit generic OLED display driver for Raspberry PI

[Meng Qi]

This 96*96 oled screen is detected by my Pi and it is working with Seeed's own library, and it would also put out stuff while running your oled_demo.

Does your library has a manual? It doesn't looks like python when I peek into your library files... Sorry I am quite a beginner. Thank you.

I use my Pi to generate sound, and if I do oled operations within the same piece of .py file that does sound, any oled writing operations would block the sound. But if I open 2 terminal instances (I am using SSH), and run sound code on one, oled code on another, it wouldn't block the sound. So it is certainly not a CPU speed issue...

Why does this happen? And if I make my Pi running some python code at boot, how I can make the codes running like within multiple terminals?

Thank you!

[gbona]

I also try to run it on RPi2 with an SPI OLED 128x64 and ran into the same problem. The program freezes in display.begin(). What can be wrong?

[Charles]

Hi gbona,
Did you checked that your I2C oled is visible with i2cdetect ? If so does his I2C address is 0x3C ?

[boik]

Hi Charles. I am trying to use your library to drive a 128x64 SPI OLED display I got from the internet. It is advertised as being SSD1106 (which I assume means SH1106). I have hacked the CS detect line of your code to force it to use SPI instead of the default I2C (this display has no CS pin). I am getting something on the display, but quite garbled.

Here is a video of it running your OLED_demo.

Are these symptoms familiar to you. Any ideas of what might need tweaking.

Many thanks

Graham

[Charles]

@boik,
Strange, first time I see SPI oled without CS line, would you mind post a picture of the back ?

You're right I forgot to add SPI option for SH1106 in oled_demo.

[boik]

Hi Charles,

[IMG]http://i68.tinypic.com/6zwsjl.jpg[/IMG]

Heres a pic of it running the circle, square, triangle cross demo. Just displays the bottom 8 lines of the image but at the top of the OLED.

[IMG]http://i64.tinypic.com/2mhbn7k.jpg[/IMG]

Not sure if this forum accepts IMG tags?

Graham

[Deennoo]

Hello Charles

I got a freebox server out of ordre.

There is a ssd1327 screen on it.

If i send you the pcb pictures can you help me to find the good pin to plug it to my PI ?

[Charles]

@Deennoo
you can post the picture on the forum, may be some other will know, because I'm not sure I will.

[Matthieu Laborie]

@Deennoo

Hi, did you succeed getting the freebox server Oled Display work with a raspberry or Arduino? Did you find any wiring schema, or source code. I would like to reuse the whole SSD1327 and CAP1066 pad of the freebox.

Regards

[akdracom]

I followed your procedures and up to the part of :

git clone https://github.com/hallard/ArduiPi_OLED

and received the following error message and can't go further :

fatal: could not create work tree dir 'ArduiPi_OLED'.: No space left on device

I am using a 8GB SD card and I think I have enough space - don't I ?

I then issued df -Bm command to check space with following :

Filesystem 1M-blocks Used Available Use% Mounted on
/dev/root 4196M 4087M 0M 100% /
devtmpfs 483M 0M 483M 0% /dev
tmpfs 487M 0M 487M 0% /dev/shm
tmpfs 487M 7M 481M 2% /run
tmpfs 5M 1M 5M 1% /run/lock
tmpfs 487M 0M 487M 0% /sys/fs/cgroup
/dev/mmcblk0p6 63M 20M 44M 31% /boot
tmpfs 98M 0M 98M 0% /run/user/1000

Am I running out of memory or what, please advise - thanks

[akdracom]

I forget to mention that in my SD card - I also have installed a media player OS (OpenElec) in addition to the Raspian OS

[Charles]

@akdracom
your're missing space on SD card 100% on /dev/root, you're SD seems to be formatted to 4GB

May be trying raspiconfig and select the menu to expand filesystem to use full SD Size (8GB) will help

[donde]

Screen Never Lights
New to OLED. Waiting for SSH1306 1.3" display like on Adafruit website. Sent for SH1106 display instead. Pinouts are left to right: VDD VSS SCK SDA D/C CS1 FS0 CS2
Using Pi Zero. Went through tutorial OK I think. 2 problems:

root@raspberrypi:~# ls /dev/i2c*
/dev/i2c-0
root@raspberrypi:~# ls /dev/spi*
/dev/spidev0.0 /dev/spidev0.1

The first check returned /dev/i2c-1 instead of /dev/i2c-0
The second response was OK.
Now I wasn't at root when I did commands, but at user.
Other problem I had to supply sudo for
./oled_demo --verbose --oled 6
I received this:

pi@raspberrypi:~/ArduiPi_OLED/examples $ ./oled_demo --verbose --oled 6
oled_demo v1.1
-- OLED params --
Oled is : SH1106 I2C 128x64
-- Other Stuff --
verbose is : yes

bcm2835_init: Unable to open /dev/mem: Permission denied
pi@raspberrypi:~/ArduiPi_OLED/examples $ sudo ./oled_demo --verbose --oled 6
oled_demo v1.1
-- OLED params --
Oled is : SH1106 I2C 128x64
-- Other Stuff --
verbose is : yes

x: 9y: 0dy: 3
x: 30y: 0dy: 2
x: 111y: 0dy: 2
x: 81y: 0dy: 4
x: 41y: 0dy: 2
x: 85y: 0dy: 5
x: 7y: 0dy: 5
x: 76y: 0dy: 2
x: 72y: 0dy: 3
x: 76y: 0dy: 4

Nothing on screen!
I wired it this way from Pi Zero
Pi 5 volts to Vdd
Pi GND to Display VSS
Pi SCL to Display SCK
Pi SDA to Display SDA
IO25 to Display FSO

No ID on Display, just this description:

Features

Self-luminous display for backlight
High resolution: 128 x 64
Viewing angle: >160 degree
Supports many control chip: Fully compatible with Arduino, 51 Series, MSP430 Series, STM32 / 2, CSR IC, etc.
Ultra-low power consumption: full screen lit 0.08W
Voltage: 3V ~ 5V DC
Working Temperature: -30 oC ~ 70 oC
Module Size: 32.0mm x 35.50mm x 4.1mm
SPI Interface, need 4 IO only.
Driver IC: SH1106

Package Includes

1 x 1.3" SPI Serial 128X64 OLED LCD LED Display Module for Arduino UNO R3

Not sure what try next. What turns on screen to see at least something?
Thanks ... donde

[donde]

I looked closer at box the display came and it said it is for SPI mode. I tried i2C and didn't light up. Then, tried SPI and still no success. Doesn't seem to be a RST pin. I see no pictures of the same pin arrangement on the Net. Looks to be a special display no one knows about. Guess I'll return it and hopefully the SSH1306 will be available soon, Sorry to take up so much room here is this comments section. Moderator, you can delete all I said on first post. donde

[fiveseven808]

I'm wondering if anyone can help me here... so using I2C, this driver works flawlessly! However, using SPI, I can't get my display to do anything (using the pinouts on the site). I know the display sort of works because the adafruit python library displays something (i think something is wrong with my screen). However, there is zero response with SPI.

Any ideas?

[shiftleftplusone]

hello,
can you please provide compile/build parameter settings and examples hw to use this lib with Geany, providing system-wide paths to #include the libs from each proprietary source code program located in any different directory?

[shiftleftplusone]

hello,
you specified the following types:
0 Adafruit SPI 128x32
1 Adafruit SPI 128x64
2 Adafruit I2C 128x32
3 Adafruit I2C 128x64
4 Seeed I2C 128x64
5 Seeed I2C 96x96
6 SH1106 I2C 128x64

the chip of the 6th is obvious, but which chip types are especially 1,3, and 4?
what about the i2c dev addresses of these OLEDs, and how to change them in the code if needed?

[shiftleftplusone]

another question:
you wrote
" Added millis() function"

But millis() is already provided by Gordon Henderson's WiringPi lib which I always use - I'm afraid that will cause interferences and problems. How can one fix that problem?

[shiftleftplusone]

and 3rd,
how to optionally the OLEDson i2c-1 or/and on i2c-0 ?

[shiftleftplusone]

sorry, typos:
and 3rd,
how to optionally drive the OLEDs on i2c-1 or/and on i2c-0 ?