U8g2: oled and conversion bmp program

[wchpikus]

Hi.
One question,what program you using to convert bmp?
I have problem to display graph 256x64 on
U8G2_SSD1322_NHD_256X64_F_4W_HW_SPI Oled display.

Nothing on the screen.
I tryed lcdassistant and microlcd java program. Strange is, i only replace jlx display to ssd and forgot how to make this pictures...
I tryed gimp and export, not work.
Problem with 256x64?
When i try old 192x64 picture used on old Progmem, works ok.
Little help);)

[olikraus]

I always use gimp and export as XBM

[wchpikus]

Did you rotate the picture or in normal position convert in gimp?

[olikraus]

Does this matter? But no I didn't rotate the bitmap.

[wchpikus]

Hmm..strange why do not work for me.
Could you tell me, this manual is ok for export file?

https://sandhansblog.wordpress.com/2017/04/16/interfacing-displaying-a-custom-graphic-on-an-0-96-i2c-oled/

[olikraus]

Could you tell me, this manual is ok for export file?
https://sandhansblog.wordpress.com/2017/04/16/interfacing-displaying-a-custom-graphic-on-an-0-96-i2c-oled/

Yes, this tutorial should exactly explain all the steps.

[wchpikus]

Hmm..ok I will today.
So no rotate,convert to b&w..i see;)
I do not use 1 bits pallete..my mistake
;)
I have to do this.

[wchpikus]

Ok not work correctly..

I rotate image and is better..but still not ok.
First image is not rotated,second 90°.
oled this one:

https://pl.aliexpress.com/item/1-sztuk-2-8-cal-16PIN-ty-OLED-Modu-SSD1322-Nap-d-IC-256-64-SPI/32835978082.html?spm=a2g0s.9042311.0.0.444e5c0fipALC6

hmm, i made test
one picture 64x64, works ok.

second 256x64

nothing on display..

but 192x64 works ok..
Could you tell me, where on this library is max resolution?
Or is a problem with something...
i will try other resolution...

edit:

max resolution is 248x64...fake oled??
250x64 and more do not work...

[olikraus]

max resolution is 248x64...fake oled??
250x64 and more do not work...

See here: https://github.com/olikraus/u8g2/wiki/u8g2setupcpp#16-bit-mode

You may need to enable 16 bit mode for u8g2 (see FAQ: https://github.com/olikraus/u8g2/blob/master/doc/faq.txt#L159)

[wchpikus]

hmm, oki i try:)

[wchpikus]

ok, it is it:)
great thanks:)
So , only gimp and all works:)