Mrbbp

Most recent activity

• store a single var in flash and load at start

  in Pico / Wifi / Original Espruino • 1 month, 1 week

  

  Thanks @Robin,
  I started with the same example, but i missed the ‘toString()’ to convert my counter in String in my attempt.

  It works now...

  thanks again.

  Regards

• store a single var in flash and load at start

  @Mrbbp started

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  @Mrbbp replied
• store a single var in flash and load at start

  in Pico / Wifi / Original Espruino • 1 month, 1 week

  

  Hello,

  I'm looking for to store a var in a permanent way (power off) and load at start (power on)
  i saw that @Gordon implement a way to store data since 2v05, but the example code is for log datas (implementative way) and it seems a beat complex just for store a counter var.

  have you a simple example to implement a counter (with a long type) storage over power-down?

  I've tried

  var memoire = require("Storage");
  [...]
  let NumPoemeEncours = memoire.read("num"); // numero encours
    if (NumPoemeEncours == null || NumPoemeEncours == undefined  || NumPoemeEncours == "") {
        NumPoemeEncours = 1;
        console.log("numero du poeme inconnu", memoire.read("num"));
        memoire.write("num",NumPoemeEncours);
        console.log("numero du poeme connu", memoire.read("num"));
    }
  console.log("NumPoemeEncours:",NumPoemeE­ncours);
  

  but it does not works!

  what i'm doing wrong?

  thanks for your time.

• power a pico with microusb phone charger

  @Mrbbp started

  • 4 comments
  • 611 views

  @Gordon replied
• power a pico with microusb phone charger

  in Pico / Wifi / Original Espruino • 5 months, 2 weeks

  

  Do you need this at the same time? Because it would potentially be really bad news to attach power to the USB power input and then plug it into your PC as well.

  Not at the same time of course, but the possibility to scratch the paint and uncover the mini usb pads and sold 2 wires seem to be a bit dangerous if i need to plug the usb in my computer to update code.

  there is a samsung travel charger with slim wire in black or white, and is cute and strong enough to power a simple led matrix.

  sorry instagram link to see picture
  https://www.instagram.com/p/COrzei-h9uH/­

• power a pico with microusb phone charger

  in Pico / Wifi / Original Espruino • 5 months, 2 weeks

  

  Hello,

  i've got a simple question, but sorry for that i found the power section of the pico board a bit confused.

  I would like to power the board with a phone charger, not with a battery.

  On wich pin do you recommand to power the pico (i need to access to usb pad for code update purpose)
  i connect a led matrix (only one 8x8) and need the 5v for the max7219 driver...

  actually, i 've sold a micro usb female deported plug on pin Vout and GND (silkscreened on the back board)
  am i doing it wrong? (sorry for grammar, not sure about that)

  i've tried on the + - battery pad, but curent is not enough on the output a read only 2.7V on the Vout pin...

  regards

  é.

• ST7735 display and picture and pictures

  @Mrbbp started

  • 13 comments
  • 1,965 views

  @Gordon replied
• ST7735 display and picture and pictures

  in Interfacing • 9 months

  

  Hello @Gordon, sorry for late answer, have to test more to give feedback.

  The optimal 4bits palette does not works.... the display seems to use only the 16MAC Palette even if i iniate with the palette generated by online converter tools.
  I've tried with 2 differents (cheap) displays a 128x128 1.44", and a 1.8" 128x160 from ebay.
  the palette does not works in 4 bits mode.
  and as the screen is initialize with 4 bit palette, the 16bits pictures are wrong color... (even if i modify the cmd(0x36,0xC8), to cmd(0x36,0xC0); (the RGB to BGR bit in the datasheet)
  i don't find a way to initialize the display in 16bits.
  if we remove the palette option, it produces an error.

  regards.

  any help would help.

  é.

• ST7735 display and picture and pictures

  in Interfacing • 9 months

  

  ok i've found the palette issue...
  the display is RGB16bits not RGB24bits, so the MAC16 Palette look like this with 16bits values:

  var colorPalette = new Uint16Array([
    0x0, 0x4228, 0x8c51, 0xBDD7,
    0x9b26, 0x6180, 0x320, 0x540,
    0x04DF, 0x19, 0x3013, 0xf813,
    0xd800, 0xfb20, 0xffE0, 0xffff]);
  

• ST7735 display and picture and pictures

  in Interfacing • 9 months, 1 week

  

  if i use a 2 colors palette on the display

  #0000FF = yellow
  #00ff00 = blue
  #ff0000 = black (no color)
  #ffffff = white

  what's wrong with the color? any advices

  regards