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techknight
Joined: 21 Apr 2008 Posts: 231
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Posted: Wed Jul 09, 2014 2:18 am Post subject: Matrix LED sign questions |
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This has been weighing in my head for quite some time...
I have made small LED matrix systems before, using basic 5x7 font tables, fixed pixel addressing for font print locations. But I want to take a step further. Fonts
But I always wondered how to approach the use of fonts, and multiple points, etc...
I seen a 12 by 48 LED matrix that actually uses Sans Serif font, and variable point sizes. So you could do 2 line, or a single line, bold, etc... and position the text to the pixel in offset. (kinda like margins).
But I dont exactly know how to do something like this in BASCOM. Anyone made a matrix display with on-board fonts? variable positions and sizes? Maybe even... Scrolling? |
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Paulvk
Joined: 28 Jul 2006 Posts: 1257 Location: SYDNEY
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techknight
Joined: 21 Apr 2008 Posts: 231
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Posted: Wed Jul 09, 2014 2:57 am Post subject: |
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Love the progress, and definitely worth looking into some more.
But I still see the fixed 8x8 font, etc... I was thinking using regular fonts such as San Serif and its adjustable via point size.
That reminds me of a 2 color window LED sign I seen at the gas station the other day red/green. They are doing animations inside animations. Such as bouncing words/GIFs up and down while scrolling the text.
How do they do this? its a self-contained unit. no PC. But I digress, this is outside the scope that I am trying to achieve. I just want basic leftword scrolling text marquee. But selectable fonts/sizes are a must that I am trying to figure out how to do.
I guess I would need tables for every single type, and every single size. Wonder if i could dump all that on an SD card and use the AVR-DOS library to fetch it somehow... |
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Paulvk
Joined: 28 Jul 2006 Posts: 1257 Location: SYDNEY
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Posted: Wed Jul 09, 2014 7:19 am Post subject: |
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Hello techknight
Its only 8x8 because I used one display but just need larger variables and bigger AVR if you stack them side by side you could get up to 32x32 with multiples of 4 displays, they can be put on an SPI buss you just ignore the mega8 or use to help. As I said its cheaper than buying the parts that make up the board.
Regards Paul |
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