max7219 4x 8x8 panels spi

[richard]

http://www.picbasic.co.uk/forum/show...955#post147955

[Ioannis]

Well, results don't match.

I do this:

1. on GLCD Font Creator 5x6 is selected since that is what says in the program: '//GLCD FontSize : 5 x 6



2. Then the character 48 is designed



3.Then Export for GLCD



The data do not match as can be seen. I am sure that I did something wrong, but what?

Ioannis

[richard]

thats glcd mode you need tft mode

[Ioannis]

Yes, that did it.

Thanks,
Ioannis

[Ioannis]

The 5x6 grid is not very roomy for good fonts. After a bit of experimenting I ended up with the rectangular fonts that follow. I thing they are readable from longer distance.

@ dw 0x89F,	0x891,	0xF91      ; 0
@ dw 0x206,	0x204,	0xF84      ; 1
@ dw 0x81F,	0x9F,	0xF81      ; 2
@ dw 0x81F,	0x81E,	0xF90      ; 3
@ dw 0x489,	0xF89,	0x408      ; 4
@ dw 0x9F,	0x81F,	0xF90      ; 5
@ dw 0x9F,	0x89F,	0xF91      ; 6
@ dw 0x81F,	0x410,	0x408      ; 7
@ dw 0x89F,	0x89F,	0xF91      ; 8
@ dw 0x89F,	0x81F,	0xF90      ; 9
@ dw 0x200,     0x0,	0x200      ; :
@ dw 0,0,0                         ; space

A small demo video is uloaded here:



Ioannis

[HenrikOlsson]

I'm slowly working on an 18F version.
Currently running on the 18F57Q43 using the SPI peripheral (planning to get to DMA eventually) but can work with MSSP or even SHIFTOUT.
Supports an arbitrary width display (within limits of available RAM) but only one row (starting to second guess myself on that one). Pixel by pixel scrolling left/right/up/down is almost working. We'll see where this ends up in the comming weeks...

[richard]

you could always just add a driver to suit this and not have to reinvent the wheel font&graphics wise etc

http://www.picbasic.co.uk/forum/showthread.php?t=24218

i'm sure a max7219 driver would be easy enough to contrive and it would make multi row /column display simpler

[Ioannis]

I'm slowly working on an 18F version....

Very interesting work! Looking forward!

Ioannis