Austin

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• Programatically connecting 2 pins

  @Austin started

  • 4 comments
  • 3,286 views

  @Austin replied
• Programatically connecting 2 pins

  in General • 10 years, 10 months

  

  So I've checked my PC, the reset pin is indeed being grounded from 3v3... And was able to test the Espruino board (just got the "official" one last night), that the C8 pin when trigger will "short" the pin to ground. So that'll work out perfectly! Thanks again for the hlep

  Cheers,
  Austin

• cool demo for stm32f4discovery/Espruino

  @Austin started

  • 9 comments
  • 5,760 views

  @Austin replied
• cool demo for stm32f4discovery/Espruino

  in JavaScript • 10 years, 10 months

  

  Update for Espruino board since it only has 3 lights... Also added ability to stop and restart it. Change the value of i to control how fast the lights change (in milliseconds), by default run=true, setting to false will stop it. You can now resume by setting run=true again. Enjoy!

  var i = 1000, run = true;
  function flashLights() {
      LED3.write(false);
      LED1.write(true);
      setTimeout(function () {
          LED1.write(false);
          LED2.write(true);
          setTimeout(function () {
              LED2.write(false);
              LED3.write(true);
              setTimeout(function () {
  				if (run) {
  					flashLights();
                  } else {
                    var checkForRestart = setInterval(function () {
                      if (run) {
                        clearInterval(checkForRestart);
                        flashLights();
                      }
                    }, 500);
                  }
              }, i);
          }, i);
      }, i);
  }
  flashLights();
  

• Programatically connecting 2 pins

  in General • 10 years, 11 months

  

  Awesome, thanks for the very thorough response! I haven't received my Espruino (starter kit) yet, but I had bought an STM32F4Discovery a few months ago that I've been playing with in the mean time. I had written a small program to cycle the state (0 to 1 and back) of the A2 pin every 3 seconds on my board last night, and was checking it with a digital multi-meter to see if it was pulled to ground, but didn't realize that reading the pin value would cause it to float as the voltage never changed much. Guess I should've used an analog meter to see it "bounce" from being pulled to ground. I was doing console.log(A2.read()) immediately after setting the pin, so it was probably too fast for the digital meter to pick up that it gained or lost voltage before floating.

  Hopefully I can wire it directly like you have mentioned above that would be preferable (and what I was attempting last night), if not then I'll go the relay route. I'm pretty sure the 2nd wire on reset is chassis ground, I'll check tonight after work...

• Programatically connecting 2 pins

  in General • 10 years, 11 months

  

  What's the easiest way to "connect" 2 pins? Should I use digitalWrite, pin.write with a timeout, analogWrite, or something else? Also should I use 2 pins, or can I use 1 pin with ground? I'm wanting to use Espruino to "press" the reset button on a PC by wiring the green/black wires to it...

  Thanks,
  Austin

• cool demo for stm32f4discovery/Espruino

  in JavaScript • 11 years, 2 months

  

  haha yea, and my Saturday has been playing with the discovery board and Espruino and loving it so far! ok, if I see anything else I post over there... thanks!

• cool demo for stm32f4discovery/Espruino

  in JavaScript • 11 years, 2 months

  

  an apostrophe & a double quotation mark seems to show up as a question mark

• cool demo for stm32f4discovery/Espruino

  in JavaScript • 11 years, 2 months

  

  not exactly sure what I changed this time I didn't try before, but it seems to be working now! Thanks

• cool demo for stm32f4discovery/Espruino

  in JavaScript • 11 years, 2 months

  

  It does have a blank line... I tried 2 blank lines (before and after) and that didn't seem to help either. Initially I had the tick marks on separate lines from the code, tried without whitespace didnt help either... It always fun to "work out the kinks" in new software :)