Mrbbp

Most recent activity

• chrome IDE error with a let in a switch case

  @Mrbbp started

  • 5 comments
  • 220 views

  @Gordon replied
• .toString(radix) ?

  @Mrbbp started

  • 8 comments
  • 307 views

  @allObjects replied
• .toString(radix) ?

  in JavaScript • 3 months, 2 weeks

  

  i've written something like that

  var reponse= {trame:"",longueur:0};
  
  s.setup(9600,{rx:B6, tx:B5});
  s.on('data', function(data) {
    reponse.trame+= data;
    if (reponse.trame.length >= reponse.longueur) {
      switch (reponse.trame.charCodeAt(1)) {
        case 0x01: // status
          console.log("status:",reponse.trame.char­CodeAt(3));
          break;
        case 0x09: // status
          console.log("check Drive:",reponse.trame.charCodeAt(3));
          break;
        case 0x12: //Check the total numbers of audio in all folders(12)
          console.log("nbr total audios:",(reponse.trame.charCodeAt(3)<<8­ ^ reponse.trame.charCodeAt(4)));
          break;
        case 0x0C: //Check the total audios(0C)
          console.log("nbr total audios:",(reponse.trame.charCodeAt(3)<<8­ ^ reponse.trame.charCodeAt(4)));
          break;
        case 0x0D: //current audio
          console.log("nom fichier audio:",reponse.trame.charCodeAt(3),repo­nse.trame.charCodeAt(4));
          break;
        case 0x24: //duration audio
          console.log("Duréé: "+reponse.trame.charCodeAt(3)+"H "+reponse.trame.charCodeAt(4)+"mn "+reponse.trame.charCodeAt(5)+"s");
          break;
        default:
          break;
        }
    }
  });
  

  and each command sent, fill the reponse.longeur with the appropriate value...

  function Duration() {
   var command = [0xAA, 0x24, 0x00, 0xCE];
    // Return: AA 24 03 hour minute second SM
    reponse.longueur = 7;
    reponse.trame = "";
    s.write(command);
  }
  

  Not Tested

  Thanks for your help @allObjects.

• .toString(radix) ?

  in JavaScript • 3 months, 2 weeks

  

  oh and a simple question about Upper-byte and Lower-Byte

  Return: AA 11 02 Upper-byte Lower-byte SM
  

  to add these upper and lower bytes...

  should i do like this result = upperByte<<8 ^ lowerByte ?

• .toString(radix) ?

  in JavaScript • 3 months, 2 weeks

  

  i give you an example of a frame

  //Check Playback Status(01)
  //Command: AA 01 00 AB
  let command= [0xAA,0x01,0x00,0xAB];
  s.write(command)
  //Return: AA 01 01 Playback status SuM
  

  if i've read and kept the good part in the gps module, it use an object and fill the "line" until it's more than 80chars or until \n char.

   var gps = {line:""};
    serial.on('data', function(data) {
      gps.line += data;
    });
  

  i do not have this '\n' in the frame module.
  the length is not always the same. between 5 and 7 chars.
  The last char is always a sum of the values sent...
  I could :
  evaluate continiously the frame to know when it is end (the sum)
  or
  evaluate the second char received to determine the length of the frame (the command),
  or
  anticipate the length (5,6,7) of the response by the command sent.

  'Status', send back 5 chars
  'duration of the current audio', send back 7 chars.

  thanks

  i'll try.

• .toString(radix) ?

  in JavaScript • 3 months, 2 weeks

  

  Hello Markus,
  a Happy new Year.

  i've found that in the forum and it do the job as i expect.

  console.log("hex:",d.charCodeAt().toStri­ng(16));
  

  the module send some char and the last one is the SUM of the transmitted string.
  i wrote something like that (i did not test it on the espruino)

  let sum=0;
  let buf = new Uint8Array();
  
  function checkAnswer(buff) {
    console.log(buff.toString(16));
   switch (buff[1]) {
     case 0x01: // status
       console.log("status:",buff[3]);
       break;
     case 0x0C: //total audios
       console.log("total audios:",buff[3],buff[4]);
       break;
     case 0x0D: //current audio
       console.log("current audio:",buff[3],buff[4]);
       break;
     default:
       break;
    }
    // reset first buffer
    buf = new Uint8Array();
  }
  
  s.setup(9600,{rx:B6, tx:B5});
    s.on('data', function(d) {
      console.log("hex",d.charCodeAt().toStrin­g(16).toUpperCase());
      let nd = d.charCodeAt();
      buf.push(nd);
      sum+= nd;
      if (sum == nd && buf.length >1) {
        // fin de la transmission
        buf.pop(); // efface le sum du buffer
        sum = 0;
        checkAnswer(buf);
      }
    });
  
  

  regards

• .toString(radix) ?

  in JavaScript • 3 months, 2 weeks

  

  Hello,
  i'm working with Voice module from DFRobot

  if i use an array of command i'm supposed to receive some datas
  i'm trying to convert the data in hexa value...
  when i'm trying .toString(radix), console displays always the same char, not bin or oct or hex value...

  sorry, where i'm wrong?

  s.setup(9600,{rx:A8, tx:B7});
    s.on('data', function(d) {
      console.log(d.toString(2),d.toString(8),­d.toString(16));
    });
  

  it display

  ª ª ª
  $ $ $
  

• chrome IDE error with a let in a switch case

  in Pico / Wifi / Original Espruino • 3 months, 3 weeks

  

  @opichals done
  thanks.

• chrome IDE error with a let in a switch case

  in Pico / Wifi / Original Espruino • 3 months, 3 weeks

  

  Hello,

  i find a strange behaviour of the chrome ide with a pico with v2.00 firmware
  If i use a let in a switch case block, IDE generate an error

  Error: Line 15: Unexpected token let
  

  i'm not not sure why it's wrong?
  in an html page with the code it does not generate error
  and for my point of view i could legaly use a let in the block
  if i upload the code in the espruino, it works.
  in a more complexe prog, it generate error in the code and nothing works (i've took some time to understand the prob)
  if i change the let for a var
  no error anymore and code run on the espruino

  let phrase= "";
  function test() {
    let tire = 7;  
    switch (tire) {
      case 7:
        // try a let
        let vTemp = Math.random(); 
        console.log(vTemp);
        break;
      default:
        break;
    }
  }
  
  function onInit() {
    setInterval(test,1000);
  }
  

  is it an error?

  regards

• use a led matrix 5x7 without driver chip?

  @Mrbbp started

  • 23 comments
  • 526 views

  @allObjects replied