Mrbbp

Most recent activity

• Use a rs485 communication module

  @Mrbbp started

  • 34 comments
  • 372 views

  @Mrbbp replied
• Use a rs485 communication module

  in Interfacing • 3 weeks, 1 day

  

  I've bought it...😎
  I'm in vacation til mid august...
  I'll try when back home

• read a line of an ArrayBuffer

  in JavaScript • 1 month, 2 weeks

  

  @Gordon oups, you're rigth.
  It's a bad cut/past.
  I've modifying the code
  Thanks

• read a line of an ArrayBuffer

  @Mrbbp started

  • 5 comments
  • 128 views

  @Mrbbp replied
• read a line of an ArrayBuffer

  in JavaScript • 1 month, 2 weeks

  

  I've done this...
  i'm waiting the postman with the 7x1 display for testing... (monday or later)

    g = Graphics.createArrayBuffer(8,8,1);
    g.setFont4x6();
    g.drawString(texte,compteur,0);
    a = new Uint8Array(g.buffer);
    // ecran 1x7
    Serial1.write([0x80,0x89,Adress],a[0],[0­x8F]);
    // ecran 7x7
    Serial1.write([0x80,0x87,Adress2],a[1],a­[2],a[3],a[4],a[5],a[6],a[7],[0x8F]);
  

• read a line of an ArrayBuffer

  in JavaScript • 1 month, 3 weeks

  

  Hello,

  i'm a bit newb with arrayBuffer...
  i use a flipdot display compose with 1 line of 7 points and a block of 7 lines of 7 points.
  I need an array of 8x8 to drawString(t,x,y)

  var g = Graphics.createArrayBuffer(8,8,1);
  

  How to access of the data stored in the first line of the array?
  g[0] ?
  and the rest of the buffer?

  sorry for this basic question but i don't know how to use this object.

• Use a rs485 communication module

  in Interfacing • 1 month, 3 weeks

  

  The crash is not an espruino issue, it's an usb issue, it produce too sometime with arduino...
  Last week i have to update firmware and install my code on 8 Picos.... I've got crashs (with automatic reboot and message) 4 time 😗. For simple and repetitive task, reboot had made it long and stressfull.

  For the upload problem, i don't know, i've discovered the reset() instruction and it seems to resolve the problem (when code use short setInterval()). You're probably right, i just change my process for upload with in first step, a reset(). Have to check

• Use a rs485 communication module

  in Interfacing • 1 month, 3 weeks

  

  An other issue with the standart 1v92 firmware.
  with the quick setInterval() or serial1.write()
  i'm unable to upload code... upload stall at a point (variable). Have to unplug and plug pico board (1.4b) in bootloader mode and reinstall firmware.

  with your custom firmware it always upload to board
  huge update for me : plug/unplug usb board crash my old macbook Pro (17 mid 2009) -> 1 time/4 unplug :/

  thanks

  é.

• Use a rs485 communication module

  in Interfacing • 1 month, 3 weeks

  

  @Gordon

  timing test

    t = getTime();
    g.setFontDennis8();
    g.drawString(texte,compteur,0);
    console.log("Draw took ",getTime()-t);
  

  1v92 FIRMWARE
  with custom font like setFontDennis8 : 0,244
  with custom font simplified : 0,239
  with custom font like setFontDennis8 + E.toString() : 0,154
  with custom font simplifed + E.toString() : 0,155

  1v92 CUSTOM FIRMWARE
  with custom font like setFontDennis8 : 0,106
  with custom font simplified : 0,106
  with custom font like setFontDennis8+ E.toString(atob) + : 0,094
  with custom font simplified + E.toString(): 0,094

  therefor best result with:
  . custom firmware
  . E.toString()
  . nothing more with simplified font (only usefull char design)

• Use a rs485 communication module

  in Interfacing • 1 month, 3 weeks

  

  and yes @Gordon, it's a long text and it is exactly why i work with Espruino,

  . more ram
  . a better api for string manipulation (than arduino) = js,
  . a small form factor!
  . easy to program

  :)