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  1. This thread is now removed from the Teensy forum.

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    You're my kind of coder, Thom. Keep up the good...

    You're my kind of coder, Thom. Keep up the good work.
  3. Post reported as harassment.

    Post reported as harassment.
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    https://forum.pjrc.com/threads/41311-Teensy-3-5-in...

    https://forum.pjrc.com/threads/41311-Teensy-3-5-interfaced-to-a-RAMPS1-4-board

    Paul offered me some good advice about better level shifters in this thread. Unfortunately, I only get a few weeks a...
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    Shift 838 on my TI, with Alpiner, taught me that...

    Shift 838 on my TI, with Alpiner, taught me that the highest level achievable of most games was just ridiculous.. Too much snow, too fast! Your moniker brought back some good memories though (the...
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    I've also created a spreadsheet that shows the...

    I've also created a spreadsheet that shows the alternate pin functions of a T3.5 (see attachment).

    RE: RAMPS 1.4, there are a few issues I often have with them, end-stop switches picking up...
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    I'm not sure what the bigger issue is, it's...

    I'm not sure what the bigger issue is, it's better to talk about it and then try stuff out, I find.

    I've "moved" my code from the LPC1768 to the T3.5 (I didn't change much, just added a heap of...
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    ST7920, monochrome, SPI and on a Mega2560 it uses...

    ST7920, monochrome, SPI and on a Mega2560 it uses different pins for the SD SPI but the RE-ARM is all wired to the same SPI port. (That's a bit annoying actually, along with the decision to not use...
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    It's not just about a cheap display, the repraps...

    It's not just about a cheap display, the repraps have both controls and a full size SD card slot.

    For the LPC1768 I'm using a RE-ARM board that I got from Kick Starter for ~$40 (I think it's going...
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    It wasn't clear to me when you mentioned it,...

    It wasn't clear to me when you mentioned it, sorry.

    But I still think (using the 10% ISR overhead guess) at 41KHz it would only increase by 4KHz = 45KHz

    The extra complexity isn't justified, I...
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    The more I think about this, the less convinced I...

    The more I think about this, the less convinced I am that it will provide the desired improvement (at least with the T3.5 which is only slightly faster than the LPC1768 I'm also testing).

    What is...
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    Well, we (3D printer enthusiasts) will be looking...

    Well, we (3D printer enthusiasts) will be looking at using somewhat "slower" displays than those, these are the actual timings for the reprapdiscount glcd which are popular with our community - so...
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    I'll start by saying I'm still interested in...

    I'll start by saying I'm still interested in seeing a DMA stepper example for Teensy (after Paul gets his T3.6 2nd USB stuff working which seems more important, for now) however...

    I've been...
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    That's correct, the DRV8825 & TMC2100 stepper...

    That's correct, the DRV8825 & TMC2100 stepper motor drivers I'm using need the step signal to be around 10us wide I think. That's the only important detail. In the interrupt I set the direction...
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    Perhaps that would be useful, depending on how...

    Perhaps that would be useful, depending on how multiple DMA transfers affect one another timing wise. It was something I considered too but I got a bit lost when I read the DMA section of the...
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    I'm actually interested in this particular topic,...

    I'm actually interested in this particular topic, Bresenham seems to have some other limitations too, like with completely smooth movement in all axes, and I also don't want to have a trapezoidal...
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    I've got a similar unanswered question about USB...

    I've got a similar unanswered question about USB interrupts over in: https://forum.pjrc.com/threads/36606-startup-time-(400ms)?p=129759&viewfull=1#post129759

    FYI - I did find this:...
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    Hi all, I'm considering adding this code to...

    Hi all,

    I'm considering adding this code to the mk20dx128.c file:

    void reset_vec(void) __attribute__ ((weak, alias("ResetHandler")));

    Along with altering the _VectorsFlash shown in the post...
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    Thanks for the quick answer Paul, that's great. ...

    Thanks for the quick answer Paul, that's great. I can also see they are available in Australia too, so even better.
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    Teensy 3.5 interfaced to a RAMPS1.4 board

    Hi all,

    I'm using one of these bi-directional logic level converters to interface a Teensy 3.5 with the MOSFETs on a RAMPS (originally D8, D9 and D10 on the mega2560):...
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