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Type: Posts; User: MichaelMeissner

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    I had signed up with NXP in order to get the 1062...

    I had signed up with NXP in order to get the 1062 datasheet before Paul made it available on PJRC.COM. I just got mail that NXP's buyout of Marvell is nearly complete (evidently it will be complete...
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    Unfortunately, the Teensy 4.0 does not have a...

    Unfortunately, the Teensy 4.0 does not have a reset pin. If the OTA uses the USB programming, then you could tie a pin to the program pin (or you could have whatever microprocessor is doing the USB...
  3. Well not everybody is comfortable with connecting...

    Well not everybody is comfortable with connecting such things. Like everything, there are always trade offs to be made. The more you go to smaller connections it can reduce the number of potential...
  4. If you aren't afraid of a little soldering (both...

    If you aren't afraid of a little soldering (both through hole and surface mount), you might want to check out this board designed by trainer4edu/frdm4236. Note for USB host, there will be extra pins...
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    Be sure to use a fast SD-HC card for your tests. ...

    Be sure to use a fast SD-HC card for your tests. Also format the card just before doing the test so the filesystem is not fragmented.

    I'm not sure whether the software or hardware support SD-XC...
  6. Note, the pinout for the audio shield is...

    Note, the pinout for the audio shield is completely different for the Teensy 4 than it is for the Teensy 3.x processors. Without doing a lot of rewiring between the audio board mounted separately...
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    I have the W25Q128JVSIQ (128 megabits, 16...

    I have the W25Q128JVSIQ (128 megabits, 16 megabytes), but I suspect there may be similar issues with other flash memory chips. But if you are soldering the chip on the audio board, you have to use...
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    I've tried before and I didn't get anywhere. I...

    I've tried before and I didn't get anywhere. I tried the Teensy 3.6 and it did not work. I also tried the Teensy 4.0 using the beta audio adapter that allows a T4 to use revision A/B/C audio...
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    It would be nice if you can pull in the fix for...

    It would be nice if you can pull in the fix for teensy4/imrxt.h and the WS2812Serial library from KurtE to get WS2812Serial to work on the Teensy 4.0:

    ...
  10. Paul, out of curiousity, have you settled on what...

    Paul, out of curiousity, have you settled on what pins you are bringing out, and the pinouts involved? Would you be bringing out the pins currently underneath the Teensy similar to the various...
  11. It is a shame that the loglow/talldog board...

    It is a shame that the loglow/talldog board hasn't progressed to retail sales at this point:

    https://forum.pjrc.com/threads/57122-Teensy-4-0-Breakout-Kit?p=211992&viewfull=1


    On some...
  12. Bear in mind names like TX/RX or DIN/DOUT can be...

    Bear in mind names like TX/RX or DIN/DOUT can be tricky as it depends on whether you are talking about the processor side (where TX/DOUT represent the output TO the device) or the device side (where...
  13. Well Paul would have to answer questions of the...

    Well Paul would have to answer questions of the design constraints of the audio shield. But in general, the audio shield's primary mission is to control and output audio data. Note, the original...
  14. Note, in terms of SD card writing, the built-in...

    Note, in terms of SD card writing, the built-in SC card reader/writer of the Teensy 3.5/3.6 will be much faster than the SD reader/writer on the audio shield. This is because the 3.5/3.6 built-in...
  15. As far as I know, the only way to connect it is...

    As far as I know, the only way to connect it is to connect it with a push button that when pushed, connects to ground (i.e. similar to how the reset or program buttons are in the 3.6).

    It isn't...
  16. Sigh, I have the worst luck with soldering. As I...

    Sigh, I have the worst luck with soldering. As I mentioned, I soldered the first board, trying to solder in stacking headers by having some space between the header and the board. It didn't go so...
  17. So what makes the Gravitech better than the other...

    So what makes the Gravitech better than the other stacking headers? From the mouser page, it looks like they only come in 8 and 6 pin headers, and were originally made for wire wrap? From the sizes...
  18. Oh, and I just tried the Sparkfun headers (2...

    Oh, and I just tried the Sparkfun headers (2 13-pin stacking headers + 1 7-pin stacking header), and I must say, I prefer having two 14-pin headers, and then using a normal 5 pin female header...
  19. One thought that I just had is perhaps an IDE...

    One thought that I just had is perhaps an IDE option that would build an executable image that includes the Teensy download module and the current ELF executable encoded in some fashion. This...
  20. I suspect the boot loader CPU does not have...

    I suspect the boot loader CPU does not have access to the SPI, serial, or I2C pins.

    For hackers with a single board, using a Pi Zero W (or Pi Zero if you don't need wifi) has been talked about in...
  21. New Adafruit stacking headers that will work with Teensy 3.2/4.0

    I noticed Adafruit recently added a set of stacking headers for their ItsyBitsy processors that use two rows of 14 pins with one row of 5 pins in the back. That seems like a familiar size. :cool: ...
  22. As I mentioned above, I had the same issue with...

    As I mentioned above, I had the same issue with pins 24-33 not being castlelatted. I put in another order after FRDM4236 redid the design to add some copper to make it easier to solder both sides,...
  23. If the scanner shows nothing and seems to hang,...

    If the scanner shows nothing and seems to hang, that is a sign you need pull-up resistors. Many I2C devices have pull-up resistors, as does the prop shield or audio shield. But not everything does,...
  24. In the Teensy 4.0 the direction and pin number is...

    In the Teensy 4.0 the direction and pin number is fixed. I.e. you have to use pin 0 for input and pin 1 for output. In the Teensy 3.x systems, there are additional pins that can be used, but these...
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    And this might be an even cheaper build. It is...

    And this might be an even cheaper build. It is basically a microphone and a cheap 8x8 i2c display with 2 colors. Note this was written for an Arduino, but it should carry over to the Teensy. The...
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    Yes it goes to the display, but it shows how to...

    Yes it goes to the display, but it shows how to get the input. You would have to change the display part completely to do LEDs instead of a screen.


    Well yes and no. It is mostly for processing...
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    Look at the Audio -> Analysis ->...

    Look at the Audio -> Analysis -> WaterFallSpectrum example.

    If you go to minute 17:36 of the video (through about 19:12), you will see it in use:

    ...
  28. I've not used the quad channel stuff. Note, you...

    I've not used the quad channel stuff. Note, you would have to change the I2S pins from the Teensy 3.x pinout to the Teensy 4.0 pinout. I.e.

    Instead of pin 9 for BCLK use pin 21/A7;
    Instead...
  29. I've seen this on tindie.com that gives you a...

    I've seen this on tindie.com that gives you a switch for the power:

    https://www.tindie.com/products/ManiacalLabs/usb-switch-buddy-kit/


    You can also build your own version with some DIY USB...
  30. Or two pins, on the left side USB D-/D+, and the...

    Or two pins, on the left side USB D-/D+, and the right side VUSB. Dunno for the 2nd pin, but having VUSB next to VIN is helpful if you want to put a switch to turn it on/off, or possibly connect a...
  31. As I suspected earlier, when I saw the lock up,...

    As I suspected earlier, when I saw the lock up, with the pixelss all plugged into 3.3v, it was just about to display white (0xff, 0xff, and 0xff) to all 64 pixels (i.e. all white at maximum...
  32. Note, I didn't bother with the level shifter, I...

    Note, I didn't bother with the level shifter, I just powered the two neopixels from 3.3v as these rings seem to be ok with 3.3v. Maybe it tripped the fuse. I need to get off to work. Tonight, I'll...
  33. If I use the stock imxrt.h from Teensy 1.48, I...

    If I use the stock imxrt.h from Teensy 1.48, I don't get any LEDs being flashed. If I just use the imxrt.h file and not the other files from the teensy4 directly like I did previously, it still...
  34. Yep, but there is no way you can run a full POSIX...

    Yep, but there is no way you can run a full POSIX system on an AVR (or a Teensy for that matter).
  35. Unfortunately it only works partially. I first...

    Unfortunately it only works partially.

    I first setup a Teensy 3.6 to run BasicTest using Serial 1, and hooked up 2 32-LED rings for 64-LEDs. It ran fine.

    I then created a new directory with...
  36. Ummm, that is incorrect. Since the original 1989...

    Ummm, that is incorrect. Since the original 1989 ANSI/1990 ISO standard of the C, the int type has always been allowed to be 16 bits.

    In fact the original machines that Dennis Ritchie used to...
  37. For just sound playback (but not other processing...

    For just sound playback (but not other processing done in the audio chip or PT8211), there are other possibilies:

    Just a plain I2S output device. I bought this, but so far I haven't wired it...
  38. The hardware has some optimizations for the main...

    The hardware has some optimizations for the main CS pin (10 for the first SPI bus), but unlike the Teensy 3.x processors (with 5 pins), the optimizations don't seem to help as much. I'll let the...
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    You have the reset pin connected to 3.3v (and set...

    You have the reset pin connected to 3.3v (and set to 255). I would try to use a real pin for this, rather than just connecting it to high voltage, and let the library reset the display.

    I've had...
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    It might make sense to post a picture showing...

    It might make sense to post a picture showing exactly how you wired it up, and exactly what program (including what libraries) were used.
  41. Is there a chip that combines both a single channel MOSI tri-state & CS pull-up?

    According to the SPI guide:

    https://www.pjrc.com/better-spi-bus-design-in-3-steps/


    Two hardware related issues are:

    Add pull-up resistors for the CS pin (and D/C pin if used);
    Make...
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    Hmmm, I never got a PM nor did I get emails. I...

    Hmmm, I never got a PM nor did I get emails. I did PM you with the address.
  43. Yes. For each of the two audio boards, you...

    Yes. For each of the two audio boards, you should not use the pins used by that audio board for anything else, with these exceptions:

    You can use the I2C pins (18/19) to connect to other I2C...
  44. Yes, the digital pins (0 - 23) are the same, as...

    Yes, the digital pins (0 - 23) are the same, as are the analog pins (14 - 23). The primary I2C pins (18 - 19) are the same. The pins for the first UART (0 - 1) are the same. If you don't use the...
  45. Ummm, I suspect you are going to need completely...

    Ummm, I suspect you are going to need completely separate boards between the Teensy 3.2 and Teensy 4.0, unless you can only use the pins not used by either 3.2 or 4.0. Differences include:

    The...
  46. Ummm, the syntax: void onClock() { if...

    Ummm, the syntax:


    void onClock() {
    if (ClockCount<=3){
    digitalWrite(ledPin, HIGH);
    }else{
    digitalWrite(ledPin, LOW);
    }
    ++ClockCount = ClockCount%24;
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    I wasn't part of the first round of beta testers,...

    I wasn't part of the first round of beta testers, but I would like to be added to the current round if you have room. Let me know what specific parts I would need to order (presumably from digi-key).
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    It sort of depends on what you want to do. The...

    It sort of depends on what you want to do. The most typical way is to use digital I2S and let the I2S device generate the sound. And for the Teensy 4.0, the main method it to get the version D...
  49. The ISO C/C++ standards say that in an arithmetic...

    The ISO C/C++ standards say that in an arithmetic expression, 'short' and 'char'' values are promoted to 'int' (*) and then the normal rules of arithmetic promotion is done (i.e. if in a binary...
  50. I had forgotten about this thread, until I found...

    I had forgotten about this thread, until I found it searching for something else.

    I did buy the flash memory and the Sparkfun adapters. I was able to solder one flash memory to the Sparcfun...
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