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Type: Posts; User: jwhoag

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    Mcu32: Your idea crossed my mind before I even...

    Mcu32: Your idea crossed my mind before I even came to this forum. I added Serial.print("hi"); to my code, but the problem persisted so I discarded that idea. But once I read your comment I noticed...
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    Ah interesting. The "smallest code" option causes...

    Ah interesting. The "smallest code" option causes it to work for me too.

    I'd make a wild guess that maybe there's some debug code somewhere in the libraries that relies on _write_r (like printing...
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    The smallest code option works for me too. Thanks!

    The smallest code option works for me too. Thanks!
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    I am seeing a similar issue (same error message)...

    I am seeing a similar issue (same error message) which I suspect may be related to yours. I'm just using the Arduino IDE, nothing fancy. See...
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    std::string causes link error

    I'm attempting to use the std::string class, but I'm getting a linker error (writer.c:(.text._write_r+0x12): undefined reference to `_write'). I'm pretty sure this exact example worked in some...
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    Adding a vote for the Windows build of the teensy...

    Adding a vote for the Windows build of the teensy CLI loader!

    I am developing firmware on the Teensy 3.1 that is intended to communicate to software running on a Windows host, and I will need an...
  7. I continued experimenting, and found my previous...

    I continued experimenting, and found my previous conclusion was not entirely correct. So I'm amending my previous post with the updated information.

    I rewrote my test to not use digitalWrite() in...
  8. Some more research would be in order here, but I...

    Some more research would be in order here, but I did a cursory test, and it appears to me that digitalWrite() messes with some of the port control bits. Maybe it works ok for I2C (I didn't try...
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    Back to esoteric-ville... I guess the one...

    Back to esoteric-ville... I guess the one advantage of the MISO/MOSI convention has over the DIN/DOUT is in schematic/board layout. You can actually name the line that goes between MISO pins "MISO",...
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    Late arrival here. If I'm reading the specs...

    Late arrival here. If I'm reading the specs correctly, MISO/MOSI pin designations are NOT equivalent to DIN/DOUT.

    Yes, there would be a 1:1 correspondence between these designations if the device...
  11. How to reset the USB connection so Windows driver will reconnect?

    It am having a problem with reconnecting the Teensy 3.1 (and 2.0 as well) to Windows software after the USB connection drops while software is connected to the USB port (i.e. cable is disconnected,...
  12. xxxajk: thanks, I'll look into adding those...

    xxxajk: thanks, I'll look into adding those diodes.

    Paul: If I can get this project working well, we are going to need a large number of Teensy boards (probably 3.1s), estimate 600 of them. Would...
  13. Thank you for your rapid replies, Paul and...

    Thank you for your rapid replies, Paul and Stevech. You have been very helpful. The project I'm working on is for a specific motherboard that fits in a smartphone thus is extremely limited in its...
  14. I guess the post editor messes with spaces so my...

    I guess the post editor messes with spaces so my diagrams didn't turn out too well. Attaching a jpeg of a drawing showing the same thing. 2306
  15. Power considerations for connect two Teensy boards via SPI?

    Hi, I've been playing around with my new Teensy boards for the past couple of weeks and it is fun blinking LEDs and doing other simple stuff! Now I'm starting to get into a more substantial project,...
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