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Type: Posts; User: kingforger

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    "Ideally there should be no pulse. The signal...

    "Ideally there should be no pulse. The signal should be 100% high. But sadly, the hardware can't seem to do it (or maybe we have a software limitation?) But compared to the waveform with 1023, you...
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    Pins 3 and 4. EMC_05 and EMC-06. Both on the...

    Pins 3 and 4. EMC_05 and EMC-06. Both on the Flex timer, from the look of it. Though I'm not sure how that would affect this problem.
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    Teensy 4.0 analogwrite minor bug?

    I'm using analogWrite to use the PWM functionality on a Teensy 4.0. I'm using 10 bits resolution. When I do analogWrite(PIN, 1023) I would expect the pin to be on 100% of the time without any dips...
  4. I love this IDE! Thank you so much.

    I love this IDE! Thank you so much.
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    Got it! Thank you both, I didn't think to refer...

    Got it! Thank you both, I didn't think to refer to previous Teensies.
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    4.1 pins descriptions

    There are 5 pins/headers on the 4.1 that go horizontal from side to side immediately adjacent to the SD card. What are they?

    I've found documentation for the SDIO pins, both of the back memory...
  7. I just downloaded this and have started using it...

    I just downloaded this and have started using it with the Teensy 4.0. Amazingly easy and it just works. I'm sold, and will check out more of this platform later. Thank you!!!
  8. If anyone's wondering how to change SCL duty...

    If anyone's wondering how to change SCL duty cycle in the EVB drivers, I've got a way thanks to Paul's clue. In fsl_lpi2c.c:

    Change
    value |= LPI2C_MCCR0_CLKLO(2 * bestClkHi) |...
  9. Thank you so much!! I found the reference manual...

    Thank you so much!! I found the reference manual on your website.
  10. I2C works on Teensy 4.0, but not on same chip's EVB. SCL differs.

    Let me know if I should be on NXP's forum rather than Teensy's...

    I can use the Teensy 4.0 to talk with my Si514 and it'll acknowledge (ACK) back. Furthermore, I can control it perfectly. ...
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    MuShoo, here's a working schematic and BOM for...

    MuShoo, here's a working schematic and BOM for just the teensy portion (built and it works great). The three buttons that you see that are the same are wired incorrectly. Also, VIN-PRI/VUSB-TRI and...
  12. Paul, this was resolved back in May of 2013. It...

    Paul, this was resolved back in May of 2013. It was my thread!

    The problem was caused by drawing too much current on the 3.3V rail. Now, the reason that it was just little voltage dips/spikes is...
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    Green is better anyway. I can follow the traces...

    Green is better anyway. I can follow the traces on the board much more easily. Black annoyed me because it was difficult to find them and cut them when I needed to do JTAG.
  14. Alright. It turns out that the schematic is...

    Alright. It turns out that the schematic is perfectly fine. For some reason, the 3.3V line generated by the MK20 is having spikes on it. Specifically, every few seconds, there will be dips down to...
  15. Thanks Paul. I'll check this over later. For...

    Thanks Paul. I'll check this over later. For now, I have to get a few other parts of my board working because I'm running out of time. And believe it or not, other parts have more priority than...
  16. Also, here's a PDF so you can view it really up...

    Also, here's a PDF so you can view it really up close (there are 6 other pages to get the full schematic, but this should be the only relevant part): ...
  17. Oh thanks. Of course you are busy, I'm sorry. ...

    Oh thanks. Of course you are busy, I'm sorry. One more quick question while I'm at it: Do you need the bootloader chip in order for the PC to be able to communicate with the chip via usb serial? ...
  18. Well it was worth a shot...

    Well it was worth a shot...
  19. Sure, here it is: http://i.imgur.com/w18bCAG.png

    Sure, here it is: http://i.imgur.com/w18bCAG.png
  20. Using the pre-programmed MINI54 on a custom board

    I am having difficulties with the MINI54 chip. I tried to adapt Paul's schematic to my own custom board (which interfaces with many other things). I can program the board I got just fine with JTAG...
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    Do you have the bill of materials available? If...

    Do you have the bill of materials available? If so, I'd love to have it. I'm making a custom teensy 3.0.
  22. Yup, a 0.1uF cap did it! Thanks. :)

    Yup, a 0.1uF cap did it! Thanks. :)
  23. I wonder... would a 1uF cap on the ADC pin to...

    I wonder... would a 1uF cap on the ADC pin to ground help? The idea would be to charge the cap. Since I'm only wanting to detect battery voltage, I only sample that pin once every few minutes at...
  24. Wow, very interesting. That leaves no doubt...

    Wow, very interesting. That leaves no doubt about what the problem is. Thank you very much!
  25. ADC Troubles (inaccurate and moving around a lot)

    I'm just trying to get a simple reading from an ADC pin. However, the value seems to both be wrong and moving around much more than it should be.

    ON TOP:
    const int batteryPin = 16;

    IN SETUP:...
  26. Thank you very much for the answer!

    Thank you very much for the answer!
  27. I guess I could find this out myself, now that I...

    I guess I could find this out myself, now that I think about it...
  28. I'm only concerned about the speed of...

    I'm only concerned about the speed of teensy-to-PC communication (not the other way). Thank you for all that info Paul, but I still have one question that remains: If I specified 256000 baud on my...
  29. Teensy 3.0 to PC communication via USB serial (>256000 baud)

    I made a quick VC++ command line program to communicate with the teensy 3.0. I can send basic commands back and forth at 256000 baud. Yay.

    Question: How do I take advantage of the 12Mbps...
  30. Yeaahhhhhh, I was thinking of doing that...

    Yeaahhhhhh, I was thinking of doing that spacewrench. Thanks for the advice.
  31. Compile C++ program for the Teensy 3.0 (Lat/Long to MGRS coordinate conversion)

    I want to convert latitude/longitude to MGRS coordinates. Using this wonderful library called "GeographicLib", I can do that quite easily on the windows platform. Here's my little program utilizing...
  32. Just an FYI for ya'll: Regarding the hardware...

    Just an FYI for ya'll: Regarding the hardware connection... Maxim apparently makes a chip for this type of idea. See page 18 of http://datasheets.maximintegrated.com/en/ds/MAX14500-MAX14503.pdf
    ...
  33. Yeah, even something as slow as 100kB/s would be...

    Yeah, even something as slow as 100kB/s would be perfectly acceptable for me though.

    At the moment, the other thing I'm considering is a hardware connection between the SD card and the USB input. ...
  34. Possible to read SD card data on the computer through the teensy 3.0?

    I want to be able to read data on an SD card that the Teensy 3.0 logs to. However, I don't want to have to take the SD card away from my board.

    In other words, my connection is like:

    SD...
  35. Oh, the Teensy 3 is connected via USB to the...

    Oh, the Teensy 3 is connected via USB to the computer. The SD card is connected to the Teensy via SPI. I suppose my question is: If I use something like serial.print to dump the files from the SD...
  36. Read SD card on computer through Teensy 3.0

    I have data on an SD card. The connection between the SD card, teensy, and computer is about as follows:

    SD card <--> Teensy 3.0 <--> Computer

    I want the computer to be able to get data from...
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    Oh, right. "I commented out anything having to...

    Oh, right.

    "I commented out anything having to do with the interrupt". So I couldn't get it to compile with the interrupts. I just wanted it to work at all for now, and it does. I do not use...
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    What does PDE stand for? I'm not sure what a PDE...

    What does PDE stand for? I'm not sure what a PDE fix is.

    I've uploaded the code of my modified parsing program example here, where it will be available for 2 weeks: http://jumpshare.com/b/877d8t...
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    GPS working!

    I got this breakout to work with the Teensy3.0 via hardware serial: http://www.adafruit.com/products/746

    I'm not sure what forum to post it under, so it's here. I'm just excited that it works...
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