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  1. It seems this was the problem. Obviously I never...

    It seems this was the problem. Obviously I never saw that TeensyLoader was still open. Thanks a lot Paul!
  2. Good suggestion. Well, I tried two USB other...

    Good suggestion. Well, I tried two USB other cables and I get the same problem. I have also tried to upload the blink sketch to a Teensy 4.0 and this works. I think the 4.0 uses the same 480 Mbps...
  3. Uploading sketches fail to Teensy 4.1

    I just bought 4 Teensy 4.1's and am getting errors uploading to all of them. I am running MacOS 1.13.6 and a clean installation of Arduino 1.8.12 and have installed TeensyDuino 1.52. When attempting...
  4. So does this mean you can transfer between a...

    So does this mean you can transfer between a Teensy and a host PC using High Speed USB (ie, 480 Mbps)? What kind of transfer speed are you getting? Is your code available?
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    Thanks, this should be fine when all I need to do...

    Thanks, this should be fine when all I need to do it write out data. However, at other points in my code (not shown here), I have to write out blank data, but read back the MISO data. Again, your...
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    Thanks a lot, KurtE, I'll take a look at this. I...

    Thanks a lot, KurtE, I'll take a look at this. I do need the CS to deassert itself every write, but I'll have to confirm this. I'm interfacing with some hardware that fills a 1024 event (24 bits...
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    I do call this function multiple times and so...

    I do call this function multiple times and so yes, there are gaps between repeated calls. I'm not sure how to reduce this though as I don't want to call the function again and clear the queue prior...
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    OK, thanks for your response. I'll keep working...

    OK, thanks for your response. I'll keep working on this to reduce the gap between words.
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    This is great, however I think it will only work...

    This is great, however I think it will only work if the number of bytes to transfer is a multiple of 2? I have the situation where I need to send 24 bit words to the SPI. I currently do this using...
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    Haven't looked at other brands yet. I have only...

    Haven't looked at other brands yet. I have only a 16 GB Lexar Class 10 on hand, but this might be worth looking into. I'm very impressed with T3.6 so far and very glad I jumped in the KS campaign. ...
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    Good to know, thank you. I am using the Teensy...

    Good to know, thank you. I am using the Teensy to acquire high speed data via SPI from a piece of hardware and am looking at ways to save it or send it quickly to a PC. I've previously used Serial...
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    uSDFS on Teensy 3.6

    I am using the uSDFS-master library to write data to the SD card on T3.6. It works for the most part, but I am noticing that occasionally I get very long delays in writing data. As a test, I am...
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    Quick update: It appears the 3T magnetic field...

    Quick update: It appears the 3T magnetic field isn't the culprit, but the RF is. This is probably not surprising. It appears we are getting large 10V spike in the USB power in, that is frying the...
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    Yes, this goes without saying. We have no...

    Yes, this goes without saying. We have no intention of creating a medical device for use in humans. Understandably, there are a lot of regulations that need to be followed for medical devices. This...
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    This is good to know, thanks. We are using the...

    This is good to know, thanks. We are using the USB to power it.
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    Thanks drjohn. This is the approach we are going...

    Thanks drjohn. This is the approach we are going to take. The Teensy is already housed in a carbon fiber box, with no ferromagnetic components other than what might be on the PCB (ie, nickel plated...
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    I have no experience with placing...

    I have no experience with placing microcontrollers in an MRI. If you do, please offer suggestions. If you don't, then please don't provide advice on irrelevant topics like MRI safety. I am well...
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    Teensy in an MRI

    Hi,

    I have a research project that involves placing a Teensy 3.1 in a 3 Tesla MRI. Unfortunately it seems that this does not work and the Teensy becomes unresponsive. I have no experience with...
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    Thanks for looking into this. I'm still getting...

    Thanks for looking into this. I'm still getting it to drop the connection occasionally, but perhaps this is related to me having a VMWare session running concurrently. I will shut it down and try...
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    Apologies, to run it: ./test_read 13824 4608...

    Apologies, to run it:

    ./test_read 13824 4608 /dev/cu.usbmodemxxxxx 30

    I have tried a few things (eg, closing the port after every read of 13864 bytes), and it seems to be much more stable now. ...
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    OS X 10.6.8. I should have mentioned that.

    OS X 10.6.8. I should have mentioned that.
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    Teensy 3.1 USB data missing bytes

    I am working on a project to transfer data from the Teensy 3.1 to a Mac via USB. I am sending a set of data (an array of 4608 - 32 bit integers) from the Teensy 3.1 to the Mac. I am sending the 32...
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    I appreciate the help on this, Christoph. I am...

    I appreciate the help on this, Christoph. I am communicating with a sensor that send 24 bit words at 24MHz. I am not sure how the sensor will behave with a short gap between the 8 bit and 16 bit...
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    This seems to be working, although I will run it...

    This seems to be working, although I will run it through some more tests. I found I had to add an #include <SPI.h> header. But no big deal.

    I am communicating with a device that uses 24 bit...
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    OK, so I guess it's not just me then. I am still...

    OK, so I guess it's not just me then. I am still having some issues. It's getting caught up in the while(trx.busy()); loop.

    I am trying to make 24 bit word transfers using SPI at 24 MHz, and was...
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    Thanks. Yes, I am using the Arduino IDE. I...

    Thanks. Yes, I am using the Arduino IDE.

    I have tried this revision, but I get the following error:



    I have added the following template declaration for ActiveChipSelectLow in ChipSelect.h:
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    I have been looking into DMA SPI transfers and...

    I have been looking into DMA SPI transfers and came across your library. Unfortunately, when compiling the example code, I get the following error:



    Arduino: 1.0.6 + Td: 1.20-rc5 (Mac OS X),...
  28. That's a good point about VMWare. I run on a Mac...

    That's a good point about VMWare. I run on a Mac natively (OS X 10.6.8), so I will shut down VMware and take another look. I appreciate your comments on this.
  29. What's interesting is that it doesn't appear to...

    What's interesting is that it doesn't appear to show up anywhere on the USB bus. Admittedly, I haven't rebooted the machine yet to see if that helps. I am running VMWare, and when I choose to...
  30. I have noticed the same problem on a Mac. The...

    I have noticed the same problem on a Mac. The Teensy3 was working for some time and uploading programs, but then it suddenly got recognized as an Input Device rather then the Serial Network it used...
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    Teensy3 serial write speed

    I know the serial.readBytes() function has been optimized on the Teensy3 and is capable of > 1MBs. This is great, but I need to write data from the Teensy to a PC (Mac OS X) at similar speeds. Does...
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