SSD1306 & SH1106 SPI Oled bgf picture display

Pzx · Joined: 05 May 2015 Posts: 39

Hello,

I would like to display included bgf pictures using the hkipniks Oled SPI code. The code works fine with SSD1306 and SH1106 SPI displays but doesnt support bgf pictures.
link:
http://bascomforum.de/index.php?thread/120-ssd1306-oled-display-1-3-i2c-spi/

I tryied use the code from Stefan, but I was not able to open included bgf file.
link:
http://www.mcselec.com/index2.php?option=com_forum&Itemid=59&page=viewtopic&t=8283&highlight=bgf+format

Can anyone help me with that? How to open included bgf file (open for binary)? Do I need AVR-DOS library?

Thanks,
Pzx

(BASCOM-AVR version : 2.0.7.8 )

EDC · Joined: 26 Mar 2014 Posts: 1133

Hey. What about using forum searchengine with inquiry "SSD1306"
You will find already maked optimised asm library for this display maded by Mrshilov Very Happy

This link take you there Wink

About writing this in Basic you dont need to use AVR-DOS and BGF can be stored in uC flash memory with easy.
BGF is encoded RLE for less code binary file.
So all what is needed is to use Restore Some_example_label and then use Read sequentially bytes till picture end.
In two first bytes header in BGF picture height and width is stored.

Pzx · Joined: 05 May 2015 Posts: 39

Thanks for your fast replay, as usuall EDC Smile

You are right, that would be the best way, but unfortunately Mrshilov SSD1306 SPI-4 and SPI-3 library does not work with my display. The screen remains black. Maybe firstly I should deeper investigate that.
Link to the display:

http://www.waveshare.com/1.3inch-oled-b.htm

I tryied with Mrshilov bas and libs SPI-4 from the link:

http://www.mcselec.com/index2.php?option=com_forum&Itemid=59&page=viewtopic&t=13550&highlight=ssd1306

and after changindg display config into SPI-3:

http://www.mcselec.com/index2.php?option=com_forum&Itemid=59&page=viewtopic&t=13641&highlight=ssd1306

My Oled does not work with the above codes, but works well with hkipniks Oled SPI code (link in my first post)
Port config of my ATMEGA 2560 is as follow:

'Config for hkipniks code:
Config Portb.0 = Output 'DISPLAY_SS CS
Config Portk.5 = Output 'DISPLAY_RS D/C
Config Portb.2 = Output 'Spi_mosi D1
Config Portb.1 = Output 'SPI_SCK D0
Config Portk.6 = Output 'DISPLAY_Reset

'Config for Mrshilov SPI-4 code:
$lib "glcdSSD1306-SPI.lib"
Config Graphlcd = 128x64sed , A0 = Portk.5 , Si = Portb.2 , Sclk = Portb.1 , Cs1 = Portb.0 , Rst = Portk.6

'Config for Mrshilov SPI-3 code:
$lib "glcdSSD1306-SPI-3.lib"
Config Graphlcd = 128x64sed , Si = Portb.2 , Sclk = Portb.1
Reset = +5V
CS= Disconected
D/C = 0V

Can anyone help with finding why it does not work?

EDC · Joined: 26 Mar 2014 Posts: 1133

Unfortunately I dont have this display so this is my first dealing with this.
But after quick look at the code I`m thinking that it is some kind of software SPI and any uC pins can be used.
So not only hardware ISP and question is do you set those choosen control pins as outputs?
Please try it without initiate hardware SPI (if used) and set pins as outputs.

Also note this, that in two wire mode CS should be grounded not disconnected.

Pzx · Joined: 05 May 2015 Posts: 39

I bought another Oled SPI-4 SSD1306 display (this model is without CS pin):

https://telmal.com/pl/p/Wyswietlacz-OLED-0%2C96-SPI-3-5V-SSD1306-niebieski-/408

The result is exactly the same - works well with hkipniks code (I tested with sw SPI and hw SPI) but still does not work with Mrshilov code.
I tried also to initialize hw SPI and to set ports as outputs in Mrshilov code - no result.

EDC, if you want to play a little with this display I can send you one Smile

kimmi · Joined: 24 Feb 2006 Posts: 1922 Location: Denmark

Pzx,
your lcd only have DI pin not DO (NC)

lib use this pin ,
my 1.3" sh1106 have the DO pin and works fine with
Mrshilov SSD1306 SPI-4 & hkipniks Oled SPI code

Pzx · Joined: 05 May 2015 Posts: 39

Kimmi, thanks for your answer and a nice foto.
I think there are different names of the same pins of different Oleds producers.
One direction SPI-3 interface needs at list CLK (SCLK) and DATA that is sent from uP to Oled (MOSI). When we use SPI-4 the interface needs additionaly D/C signal (SS) for Command/Data identification.
In my oppinion in case of your display D0 and D1 are used as CLK and DATA signals (or the opposite).
The remaining pins are:
RST - Reset
DC - D/C (SS)
CS - Chip Select

EDC · Joined: 26 Mar 2014 Posts: 1133

I download Hkipniks code to look for differences.
Libs are not mystery and can be edited by users if they know what to do Very Happy

Maybe someone find this fun, like me Very Happy

Lib is like TXT file.

First difference is duration of reset and wait after reset.
In Hkipniks code this is 100ms

Pzx · Joined: 05 May 2015 Posts: 39

After some tests I found out that port k of ATMEGA2560 can not be used as D/C pin in Mrshilov SPI code (can be used in hkipniks code).
With that assuption samaller (0,96') display that has SSD1306 controller started to work well.
Changing Reset time and Initialization sequence in the lib had no impact - still works well.

Example of good pin configuration:

$lib "glcdSSD1306-SPI.lib"
Config Graphlcd = 128x64sed , Si = Portb.2 , Sclk = Portb.1 , A0 = Portb.0 , Rst = Portb.3

Si->SDA
Sclk->SCL
A0->D/C
Rst->RST

Unfortunately bigger display (1,3') with SH1106 controller (very similar to SSD1306) still does not work with Mrshilov SPI code (works with hkipniks code)
Changing Reset time and Initialization sequence in the lib did not help.

My pin configuration:

$lib "glcdSSD1306-SPI.lib"
Config Graphlcd = 128x64sed , Cs1 = Portb.7 , Si = Portb.2 , Sclk = Portb.1 , A0 = Portb.0 , Rst = Portb.3

Cs1->CS
Si->DIN
Sclk->CLK
A0->D/C
Rst->RES

kimmi · Joined: 24 Feb 2006 Posts: 1922 Location: Denmark

EDC · Joined: 26 Mar 2014 Posts: 1133

I also take a look into basic code again and today I saw:

EDC · Joined: 26 Mar 2014 Posts: 1133

I should do something else but I could not resist Very Happy

I take code from Arduino section and I mood one routine.
Yo can grab example how BGF can be decoded in basic.
Code and BGF file from this screens attached Very Happy

This can be adapted for testing new displays where libs are not available yet.
Normally columns and rows are counted but here I countdown bytes to write for simplicity.

[EDIT] I forgot about situation when AA should be shown Very Happy

Pzx · Joined: 05 May 2015 Posts: 39

I reconfigured jumpers and tested my 1,3' SH1106 display with I2C interfece using this lib:

http://www.mcselec.com/index2.php?option=com_forum&Itemid=59&page=viewtopic&t=13013&highlight=sh1106

It works fine with software and also hardware I2C (much faster)
Maybe there is an easy way to change the interface from I2C to SPI (preferably hardware SPI) inside this lib?

Pzx · Joined: 05 May 2015 Posts: 39

After several days of tests I give up because I still can not effectively work with SH 1106 1,3' oled display using SPI interface. Hkipniks code works fine but offers limited functionality (no bgf and TT fonts) and its relatively slow. This display is very popular because its easy to buy, cheap (10$) and 30% bigger than SSD1306.
Maybe I could have a question or suggestion for Mark and/or Mrshilov to write a Bascom driver for SH 1106 using SPI interface (SW and HW options would be great). I would buy with pleasure a new version of Bascom with that feature included. For sure not only me.

Hkipnik · Joined: 03 May 2010 Posts: 20

Hello,

For the SH1106-SPI Display you can use this LIB