Frenchfaso

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• micro:bit display pixel brightness

  @Frenchfaso started

  • 5 comments
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  @Frenchfaso replied
• micro:bit display pixel brightness

  in Other Boards • 6 years, 8 months

  

  Hello Gordon,
  thank you for your reply!
  I've tried a couple of things, but I suspect the switching via setInterval is not fast and/or precise enough.
  Here is what I've tried so far (trying to get all pixels at 50% brightness):

  setInterval(function(){
   show(0x1FFFFFF);
   setTimeout("show(0)", 10);
  },20); 
  

  and this one:

  var c = 0;
  setInterval(function(){
   if(c%2===0) show(0x1FFFFFF);
   else show(0);
   c++;
  },10); 
  

  I thought the last one would be a little bit faster (by removing setTimeout) but nothing changed.

  As for a firmware mod, this would be awesome of course!
  A nice way to implement it, would be perhaps in your graphics library, while creating the ArrayBuffer:

  g = Graphics.createArrayBuffer(5,5,4);
  

  this way we could manage images with 16 levels of gray/brightness directly.
  Would this make sense?

  The micropython firmware supports 9 levels of brightness (0 is off) and visually it works pretty well, the other official firmware (the js/typescript thing) "supports" 255 levels of brightness, but this really does not work, and all kind of weird things happen (probably the out-of-phase problems you mentioned?)

• micro:bit display pixel brightness

  in Other Boards • 6 years, 8 months

  

  Ideally of individual pixels.
  I was just reading your excellent page about PWM, calling the microbit.show() function with this technique should do the trick, but probably only for the whole screen/whole images, right?
  PS: Espruino is by far the best firmware for the micro:bit, a high-level language AND full BTLE stack!!!

• micro:bit display pixel brightness

  in Other Boards • 6 years, 8 months

  

  Hello Gordon,
  is it possible to set the brightness on the micro:bit pixels like with micropython?
  Thanks!

• Make your own JavaScript Home PC (C64-style!)

  in News • 8 years, 11 months

  

  Thanks!
  Sounds like a fun project, I probably need some more fiddling around before being able to do this though :-P

• Make your own JavaScript Home PC (C64-style!)

  in News • 8 years, 11 months

  

  That's cool!
  I'm a lowlevelstuff noob, so probably this is a dumb question.. but, would it be possible to compile espruino for the actual Commodore 64?
  I've seen there are a couple of (old ) C compilers and tools for the C64/C128 and also a complete cross development package for the 65(C)02 systems (cc65)