JumJum

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• Graphics how to set callbacks to C- functions

  @JumJum started

  • 3 comments
  • 38 views

  @JumJum replied
• Graphics how to set callbacks to C- functions

  in JavaScript • 59 minutes

  

  Hmm, I tried to figure out, how to use graphicsInternal, .....
  and found only something in lcd_st7789-8bit where setPixel is not set again.

  Next try was to add JSGRAPHICSTYPE_OTHERS in JsGraphicsType (graphics.h)
  and an if-statement in graphicsSetCallbacks(graphics.c) to skip xxxSetCallbacks.
  In my own driver, this worked fine, but in all functions from jswrap_graphics(for example setPixel) I've got runtime error. Looks to me like setCallback is necessary (?)

  My actual solution for my problem is to add a weak function for JSGRAPHICSTYPE_OTHERS, which can be overroled in my driver. My driver for ILI9341 now is much faster compared to JS-solution.

  See following sources.
  If this is of interest for Espruino, I would create a pull request.

  graphics.h:

  typedef enum {
    JSGRAPHICSTYPE_ARRAYBUFFER, ///< Write everything into an ArrayBuffer
    JSGRAPHICSTYPE_JS,          ///< Call JavaScript when we want to write something
    JSGRAPHICSTYPE_FSMC,        ///< FSMC (or fake FSMC) ILI9325 16bit-wide LCDs
    JSGRAPHICSTYPE_SDL,         ///< SDL graphics library for linux
    JSGRAPHICSTYPE_SPILCD,      ///< SPI LCD library
    JSGRAPHICSTYPE_ST7789_8BIT, ///< ST7789 in 8 bit mode
    JSGRAPHICSTYPE_MEMLCD,      ///< Memory LCD
    JSGRAPHICSTYPE_LCD_SPI_UNBUF, ///< LCD SPI unbuffered 16 bit driver
    JSGRAPHICSTYPE_OTHERS  ///< Driver that support callbacks only
  } JsGraphicsType;
  bool graphicsSetCallbacksOthers(JsGraphics *gfx);
  

  graphics.c:

  /// Set up the callbacks for this graphics instance (usually done by graphicsGetFromVar)
  __attribute__((weak))bool graphicsSetCallbacksOthers(JsGraphics *gfx){
    return false;
  }
  
  bool graphicsSetCallbacks(JsGraphics *gfx) {
    if(gfx->data.type >= JSGRAPHICSTYPE_OTHERS){
  	return graphicsSetCallbacksOthers(gfx);
    }
  

  Last not least in myOwnDriver.c:

  bool graphicsSetCallbacksOthers(JsGraphics *gfx){
    gfx->setPixel = myOwnCallbackSetPixel;
    gfx->fillRect = myOwnCallbackFillRect;
    return true;
  }
  

• Graphics how to set callbacks to C- functions

  in JavaScript • 1 week

  

  Looks like on each call of graphicsGetFromVar, graphicsSetCallbacks is called.
  So its called very often.
  My expectation was to set callbacks (fillRect, setPixel) only once during initialisation.
  This would add an option to write my own drivers in C, which only set fillRect and setPixel.

• Espruino at FOSDEM 2023 (Feb 4/5 2023)

  in News • 1 month, 2 weeks

  

  Are there any plans to visit other events ?

• PI Pico pre-alpha

  @JumJum started

  • 18 comments
  • 2,218 views

  @SimonGAndrews replied
• PI Pico pre-alpha

  in Porting to new Devices • 7 months

  

  @SimonGAndrews
  Good news

  • got a pico w
    
  • got it connected from Espruino to my wireless
    Bad news
    
  • don't get my hands on a http-server. There is a first step in Github, but my understanding is poor. My way right now is a mix of trial/error and copy/paste
    
    

  BTW, Gordon already offered to help changing from cmake to espruino like make, once the port is kind of stable. For me this port is having some fun, don't have to make money for the family.

• Useless machine

  in Projects • 7 months, 3 weeks

  

  Well.. could be me ;-)

  May be, this can help for audio output http://forum.espruino.com/conversations/­363093/#comment15963863
  I used it for some simple speech, but it can be used for sound, music etc.
  last not least its cheap.

• Useless machine

  in Projects • 8 months, 2 weeks

  

  @TheLogan
  are there any news (even bad news) about your talking hat ?

• PI Pico pre-alpha

  in Porting to new Devices • 9 months

  

  @user143733 I sent you a message

• Problem with nested modules

  in JavaScript • 10 months

  

  Save the module in Storage.
  See more here http://www.espruino.com/Modules#from-sto­rage