GeorgeM

Most recent activity

• Struggling with a simple piece of code...

  @GeorgeM started

  • 5 comments
  • 1,771 views

  @Robin replied
• Struggling with a simple piece of code...

  in JavaScript • 3 years, 6 months

  

  @Robin Thanks for getting back with all the resources... I'll have a look asap; in the meantime I've managed to get closer to what I wanted using callbacks.
  And yes, new to JS as well... seems to be quite different when compared to Python or C/ C++.

• Struggling with a simple piece of code...

  in JavaScript • 3 years, 6 months

  

  Right, just so it's out the way... I've only just pick up JS w/ Espruino and I'm kind of struggling with a simple piece of code:

  const gnd = digitalWrite(B3, 0);
  const pwr = digitalWrite(B4, 1);
  const cw = 1;
  const ccw = 0;
  const dataCW = [];
  const dataCCW = [];
  const dataLength = 36;
  
  
  const getData = (dir, t) => {
  	const solarIn = () => analogRead(A5);
  	const dataRead = () => ((solarIn() * 65536) * 5.0) / 65536;
  	const dataPush = (data) => {
  		data.push(dataRead());
  	};
  
  	const peekVal = () => {
  		if(dir === 1) {
  			for(let i = 0; i < dataLength; i++) {
  				setTimeout(() => {
  					dataPush(dataCW);
  					if(dataCW.length === dataLength) {
  						let peekValCW = Math.max.apply(null, dataCW);
  						let peekValPosCW = () => dataCW.indexOf(peekValCW);
  						return peekValPosCW();
  					}
  				}, i * (t / dataLength));
  			}
  		}
  		else if(dir === 0) {
  			for(let i = 0; i < dataLength; i++) {
  				setTimeout(() => {
  					dataPush(dataCCW);
  					if(dataCCW.length === dataLength) {
  						let peekValCCW = Math.max.apply(null, dataCCW);
  						let peekValPosCCW = () => dataCCW.indexOf(peekValCCW);
  						return peekValPosCCW();
  					}
  				}, i * (t / dataLength));
  			}
  		}
  	};
  	return peekVal();
  };
  
  
  getData(cw, 1000);
  
  

  All I'm trying to do atm is to read a value from a POT(mimicking a future sensor) which then gets stored in an array depending on the two inputs which then would get the position in that array of the greatest value stored... now, all I want is to be able to "see"(print) that value-position, then store it under another const/ let and do something with it...
  In Python this would be something simple like:

   //to see/ print the data for visualisation purposes only:
  print(getData(cw, 1000)) 
  //to store it under another variable:
  var  =  getData(cw, 1000)
  
  

  Now the printing issue is kind of solved in the sense that I can just print the return of that conditional:

  //line 25 or 37
  print(peekValPosCW());
  
  

  But if I'm doing it from where I'm calling the function it's giving me "undefined"... now I get the fact that it's printing undefined because it calls for the print much faster than it takes the function to complete and output something out(at least I'm pretty sure that's what's going on)... but just as a test I've tried using a setTimeout on the print of about 3sec and I'm still getting undefined back which only confused me even more...

• Pico - analogRead()

  @GeorgeM started

  • 9 comments
  • 3,002 views

  @allObjects replied
• Pico - analogRead()

  in Pico / Wifi / Original Espruino • 3 years, 7 months

  

  Yep, a wrapper is a great idea, especially in the asynchronous way JS works; I'm just about 6weeks into JavaScript and 4-5days into Espruino... and let's say it's quite different when compared to C++, Python.

• Pico - analogRead()

  in Pico / Wifi / Original Espruino • 3 years, 7 months

  

  Yep, was familiar with the way Arduinos work... MicroPython/ CircuitPython are doing the same, using the ADC value, so that's why I was a bit in the woods with this one... but do get your point when scaling's involved.

• Pico - analogRead()

  in Pico / Wifi / Original Espruino • 3 years, 7 months

  

  Haha, it sure did! ...it took me a minute to see it.

• Pico - analogRead()

  in Pico / Wifi / Original Espruino • 3 years, 7 months

  

  Got it... seems a quick math on the pure analogRead() checks out:
  ((65536 * 0.99879453727) * 3.3) / 65536 = 3.296021972991

• Pico - analogRead()

  in Pico / Wifi / Original Espruino • 3 years, 7 months

  

  Hi All,

  Just a quick one with regards to analogRead() values I'm getting back from pin A5 on the Pico:

  	const solarIn = analogRead(A5);
  	const dataRead = () => {return (solarIn * 3.3) / 65536;};
  

  • console.log output being this:
    0.00005031789 or 2.45872911421e-8
    
    

  -using the terminal for querying gives me an output between 0 & 1:

  >analogRead(A5);
  =0.99879453727
  >analogRead(A5);
  =0.41113908598
  >analogRead(A5);
  =0.00073243305
  

  any ideas? I'm sure I'm doing something wrong but can't figure out where...

  Regards,
  George M.