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Type: Posts; User: miciwan

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  1. Replies
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    Yeah, it totally helped. Connecting all the...

    Yeah, it totally helped. Connecting all the Teensy ground pins to the analyzer made it way better. I haven't done any test with a dedicated PCB yet.
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    Yup, they cannot generate DMA requests (or rather...

    Yup, they cannot generate DMA requests (or rather they most likely can, it's just not routed to the DMA Mux). With the interrupts I've been generally seeing some weird stuff going on. Enabling them...
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    Nice! @easone do you happen to remember what...

    Nice!

    @easone do you happen to remember what problems you had when using the shifters 4-7? In my experiments, they were behaving just fine, but I haven't tested them really thoroughly. BTW, in...
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    The manual is indeed pretty inconsistent. Most of...

    The manual is indeed pretty inconsistent. Most of the sections just talk about SHIFTERi. The text description of the parallel interface in 50.3.4.1 mentions shifters 0-7, and so does the example...
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    Teensy 4.1 How to start using FlexIO?

    Hi everyone,

    I'm slowly working though different parts of the documentation, to build the enough understanding of the i.MX RT1060 to use it in one of my projects. Two important components will be...
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    Sure - just a signal analyzer hooked up straight...

    Sure - just a signal analyzer hooked up straight to Teensy.

    23622

    But the ground was a good direction! Thanks for that tip! I did connect ground in few more places rather than only two, and it...
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    There's no PCB, it's just the logic...

    There's no PCB, it's just the logic analyzer/signal generator hooked up to Teensy pins. And the same thing happens at lower speeds too. With 12bit bus, I'm seeing these glitches even at 1MHz. And on...
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    Crosstalk with many multiple inputs

    Hi everyone,

    I'm seeing some unwanted behavior and I was hoping that someone could advice on what it could be caused by and/or what could I do about it.

    Long story short, I'm working on...
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    I tried doing similar setup for the output and it...

    I tried doing similar setup for the output and it works fine too. I set up the FlexPWM module to ouput the clock signal on Teensy pin 4 (should be doable with QuadTimer too, but FlexPWM docs were...
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    @KurtE - ah, great points. Properly...

    @KurtE - ah, great points. Properly flushing/invalidating caches is crucial when working with such systems, thanks for pointing that out. TBH, with this being my first T4.1 thing that I touched, I...
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    I was going through the DMA related things...

    I was going through the DMA related things recently, starting from scratch, and I was writing things up as I went through them. I posted the thing here:...
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    Hi everyone, I have recently started looking...

    Hi everyone,

    I have recently started looking into using some of the lower-level functionality of the Teensy 4.1/iMX RT 1060, including DMAs, register-level access to pins etc, and eventually...
  13. Like I mentioned, my Vin just doesn't get to the...

    Like I mentioned, my Vin just doesn't get to the on-board voltage regulator.

    Teensy 3.2 is 4 layer board, right? I don't really know how it's routed, I don't know how deep my cut was compared to...
  14. The image is mirrored for some reason, I just...

    The image is mirrored for some reason, I just hooked up the microscope to my PC, I didn't bother with any setup.

    Right now, none if this external circuitry is connected (but basically the USB...
  15. Here's the picture of the cut, I did it along the...

    Here's the picture of the cut, I did it along the whole pads.

    21858

    Is the trace connecting Vin to the voltage regulator anywhere there? I clearly must have damaged that somehow, and I'm not...
  16. Cutting Vin from Vusb and bricking Teensy 3.2 in the process

    ---------------------------------------------------------------------------

    Admin Edit:

    If your Teensy 3.2 is bricked after cutting too deep, info & a solution can be found here:
    ...
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    Hmm, ok, I think i figured it out. After a...

    Hmm, ok, I think i figured it out.

    After a closer inspection of the board itself, it looks like two outputs of the microcontroller are shorted:

    21299

    and as it happens these are the two USB...
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    I tried doing all this without anything hooked up...

    I tried doing all this without anything hooked up to any of the USB ports, after a fresh reboot etc. (no HID devices were active in the system).
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    I'm having the same problem, *but* on just plain...

    I'm having the same problem, *but* on just plain Teensy 3.2, on Windows 10. Hooking up the board to the USB port gives me "USB device not recognized".

    The cable that I'm using is a tested data...
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