Trogdor1967

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• Pico JS compilation issue with peek32/poke32

  in General • 8 years

  

  That did it!

  Thanks for the help, and I really am enjoying the Espruino!

  Note: I get a 7MHz square wave, not 8MHz. Nice and fast, and proves the point about compilation and direct STM register access!

  Screenshot attached.

• Pico JS compilation issue with peek32/poke32

  @Trogdor1967 started

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  @Trogdor1967 replied
• Pico JS compilation issue with peek32/poke32

  in General • 8 years

  

  I tried to use the example code provided on the JS Compilation page: http://www.espruino.com/Compilation .

  The code is as follows:

  function toggler() {
    "compiled";
    var pB2 = 0|B2.getInfo().out_addr;
    var cnt = 1000000;
    for (var i=0;i<cnt;i++) {
      poke32(pB2, 1); // on
      poke32(pB2, 0); // off
    }
  }
  

  However, when I call toggler(), the pin does not change. If I substitute ...

  digitalWrite(B1,1);
  

  ... for the first poke32(), it does work, generating a square wave with a large negative duty cycle. That makes sense, since much more code is executed before the digitalWrite() is complete.

  Likewise, I can use digitalWrite to reset the pin, and poke32 to set the pin, and I get a square wave with a large positive duty cycle.

  But, using poke32 for both set and reset generates no change on the pin.

  Has anyone tried this example on the Pico? Can anyone confirm this problem?