SSD1306 OLED (72x40) I2C display from scratch

[richard]

Richard, how did you come to this $68 value please? I can't figure it out

the info supplied with the display makes calculating the value somewhat difficult . in fact i cannot see the connection at all

the command basically sets where the memory line representing page 0 bit 0 maps to the physical display top row pixels, it can be vertically offset by 0 to 63 pixels in a virtually identical way to the way the display scrolls horizontally

it needed to be offset by -23 pixels to get the top row to align with page 0 bit 0

command range = 0x40 to 0x7f , 0x7f - 23 = 0x68

[flotulopex]

Well, I think I'm just gonna remember this settings "as is".

Thanks for trying to make things more clear for me

[CuriousOne]

This is very interesting thread, giving me some hope that I will be able to use OLED screens with PBP one day, but I have a quesiton - 24C64 or something like that costs under $1. Why not use it for font storage?

[richard]

I have a quesiton - 24C64 or something like that costs under $1. Why not use it for font storage

because you can save your $1 and another one by buying a better pic to start with and :-

not have a costlier more complex circuit board .
use a standard font file generated by glcd font creator.
its faster, uses hardware i2c and can do proper graphics too.

as i said at the beginning if you want easy get a pic 18

[CuriousOne]

So expensive
I'm buying 2nd hand 886 and 1829 for about 50 and 90 cents in China
Since I'm not doing anything commercial, this is just fine for me.

[CuriousOne]

And by the way, I don't see any reasons, why you can't write GLCD (which can't save file on windows 10-11) generated or any other software generated font into external EEPROM.

[richard]

don't see any reasons, why you can't write GLCD generated or any other software generated font into external EEPROM.

Nor do I , but I have never come anything to make a bin or hex file easily from the generated code

(which can't save file on windows 10-11)

mine works perfectly win 10 and 11 , make sure to add the .lcd extension to the file name when saving it otherwise it goes funny

[tumbleweed]

Why not use it for font storage?

Because this thread will be followed with "how can I speed up my OLED display routines?".

The choice is obviously yours, but the 18F27Q43 has 128K of flash, 8K of ram, and runs at 64MHz.
The only downside is the hardware I2C peripheral isn't compatible with the old MSSP I2C, so you're stuck using PBP's software I2CWRITE/I2CREAD or rolling your own (which is not trivial for these new parts).