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Type: Posts; User: drmartin

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  1. Replies
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    I'd be very very interested in getting a quick...

    I'd be very very interested in getting a quick look peek at how you were able to get this system running.

    For me, please do not spend a lot of time cleaning up your current implementation as I...
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    - What is minimum safe operational temperature...

    - What is minimum safe operational temperature for Teensy 3.5 /3.6?

    How "safe" is your "safe" requirement ??

    You describe using a "Arduine pro 2560" with no issues.
    Both the 2560 and the...
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    I respect your comment but suggest that replacing...

    I respect your comment but suggest that replacing a fuse with a fuse wire that will act as a replacement fuse is not totally unreasonable. I suggest we just let this tangent die.
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    The Teensy 3.6 has a 500ma fuse. Perhaps you just...

    The Teensy 3.6 has a 500ma fuse. Perhaps you just blew the fuse.

    See https://www.pjrc.com/teensy/schematic.html for the schematic.

    A picture of the PCB can be viewed at...
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    When I'm presented with puzzles like this, I tend...

    When I'm presented with puzzles like this, I tend to look at the raw data. Wireshark is a pretty quick and easy way to see all of the Ethernet packets between your computer and the server. It's...
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    I have successfully used all eight sockets that...

    I have successfully used all eight sockets that the WINet hardware provides. My project was done about 18 months ago using the Libraries and the development tools of the day. It worked (and continues...
  7. Yes.. I do have the rest of my Telnet Server code...

    Yes.. I do have the rest of my Telnet Server code but it would be confusing to post as it is intertwined with the rest of my specific application code.

    I believe you would be better served by...
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    Windows 10 Creators Update / Arduino 1.8.2 /...

    Windows 10 Creators Update / Arduino 1.8.2 / Teensyduino 1.36 with the new teensy_post_compile.exe: it works.
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    Yes - The Serial Monitor and all other Teensy...

    Yes -

    The Serial Monitor and all other Teensy Loader functions work with Windows version 1703. You just have to push the button on the Teensy to get the upload started.
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    Another couple of examples to work from ...

    Another couple of examples to work from

    Serial.printf("%02X ",Byte1); // prints "01 " ie the hex value with a trailing space
    Serial.printf("%02X %02X %02X %02X %02X %02X %02X %02X ",Byte1, Byte2,...
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    Just FYI -- Another data point... I also now...

    Just FYI -- Another data point...

    I also now have to push the "reset" button on my Teensy 3.1 and 3.2 to get the Teensy Loader to load new firmware.

    This issue has recently appeared as the...
  12. My application was using Teensy 3.2(s) My...

    My application was using Teensy 3.2(s)


    My application was remote data monitoring and logging. I have TFT Display, Push Buttons, One-Wire Temperature Sensors, I2C Temperature, Pressure, and...
  13. I have no idea if this is related but I...

    I have no idea if this is related but I experienced a similar behavior.

    I luckily had included a Telnet connection that allowed me to examine the socket status of all the WizNet sockets. I...
  14. Replies
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    For me, the trick to solder these TDFN and QFN...

    For me, the trick to solder these TDFN and QFN style parts by hand is LOTS of flux, a fairly large soldering iron tip, and a 'ball' of solder on the tip. You can then just 'swipe' or 'roll' the...
  15. This thread made me wonder how MY scope would...

    This thread made me wonder how MY scope would compare so I just had to try a test.

    As always, the first issue is how do you actually probe the signal without having the scope probe ground lead...
  16. Top View - Teensy 3.6 with adapter PCB and...

    Top View - Teensy 3.6 with adapter PCB and WIZ850io
    9663
    Side View - Teensy 3.6 with adapter PCB and WIZ850io
    9662

    The easiest and best solution is to use Paul's WIZ8x0io & SD Card Adaptor...
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    I also have several of these displays working...

    I also have several of these displays working with several Teensy 3.6 boards.

    Your code seems typical but your picture of the connections is a bit hard to trace.

    I would start by double...
  18. I suspect your real issue will not be the wire...

    I suspect your real issue will not be the wire speed but rather how fast can you receive the characters into the supervisor program. I think I remember that UART4 does not have a receive FIFO so it...
  19. 3.3v MAX3488 is available in DIP ...

    3.3v MAX3488 is available in DIP

    https://datasheets.maximintegrated.com/en/ds/MAX3483-MAX3491.pdf

    Max Distance depends IO Driver characteristics, wire/trace capacitance (including ic pin...
  20. Oops - guess I'm getting older and forgetful -...

    Oops - guess I'm getting older and forgetful - I've corrected the numbers. Thanks.
  21. It depends on what you are attempting to do. A...

    It depends on what you are attempting to do. A little more detail on what is connected to what and why would make replies more specific to your needs.

    The general answer to your question is:
    ...
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    Just something to consider........ Take a...

    Just something to consider........

    Take a quick look at the MAX9814 Microphone Amplifier with AGC and Low-Noise Microphone Bias

    http://datasheets.maximintegrated.com/en/ds/MAX9814.pdf

    It...
  23. It all comes down to your speed requirement. The...

    It all comes down to your speed requirement. The slower you run the Serial data -- The farther you can run the wire before the signal becomes to distorted to accurately receive.

    Interconnecting...
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    Since you are using the built-in SD socket and...

    Since you are using the built-in SD socket and since this SD socket is wired to the SDIO interface you ABSOLUTELY MUST tell your SdFat_beta library to use the SDIO interface.



    This is exactly...
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    I thought I pointed you to a Teensy 3.5/3.6...

    I thought I pointed you to a Teensy 3.5/3.6 version of the SdFat Library that was compatible with the on-board Teensy 3.5/3.6 SD Card Socket in my previous post.....

    However, if you insist in...
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    See...

    See https://forum.pjrc.com/threads/36737-Try-SdFat-forTeensy-3-5-3-6

    for a link to a version of the SdFat Library that has been modified to support the SDIO interface on the Teensy 3.5/3.6
  27. Replies
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    What many people appear to be missing is that the...

    What many people appear to be missing is that the SD Card Socket on the Teensy 3.5 and Teensy 3.6 is connected to an entirely new interface inside the microprocessor from where the SD Cards on prior...
  28. Replies
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    You need to update both your version of the...

    You need to update both your version of the Arduino IDE and your version of Teensyduino.

    The core libraries were updated to include the definition of BUILTIN_SDCARD on 10/23/2016 beginning with...
  29. While not immediately Teensy compatible, I was...

    While not immediately Teensy compatible, I was intrigued by the AT&T IoT Starter Kit that may be used for such a task.

    See https://starterkit.att.com/kits

    Note especially the kit that contains...
  30. Something to consider but possibly not related......

    Something to consider but possibly not related...

    I was playing with Teensy_Loader_CLI on a Raspberry Pi and uploaded the demo file blink_slow_Teensy36.hex from the Teensy_Loader_CLI package.
    ...
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    Tft.begin sets up the display and gets the...

    Tft.begin sets up the display and gets the display going.

    Ts.begin sets up the separate touchscreen controller ic on the display board and gets the touchscreen hardware also going.

    You will not...
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    The tft.print method you are using does not erase...

    The tft.print method you are using does not erase the old character before writing a new character in its place.

    Hence you get every character writing on top of the existing old characters which...
  33. Yes, You are correct. The two memory devices (SD...

    Yes, You are correct. The two memory devices (SD Card and 23LC1024 SRAM) share the common SPI signals (SCLK, MISO, and MOSI) but do not share the Device Select signals. The SD card uses SD Chip...
  34. The Teensy Loader program normally expects to use...

    The Teensy Loader program normally expects to use the Serial USB connection to do alot of its magic. When you select Tools - USB - Audio there is no Serial installed as part of your sketch.
    ...
  35. The trick to wiggling a pin is not just setting...

    The trick to wiggling a pin is not just setting the Data Direction Register and the IO State (High/Low). You also have to "get the engine running" ie all of the clock sources configured, all of the...
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    Hmmm... That is interesting. I'll bet I have...

    Hmmm...

    That is interesting. I'll bet I have only needed to press the program button three or four times in the last year...

    I'm using both Windows 7 and Windows 10 (depends on which computer...
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    If the Teensy 3.2 is running a program ok with a...

    If the Teensy 3.2 is running a program ok with a USB Serial connection then the Teensy loader program can send a command over the USB connection to start the bootloader code in the Teensy.

    Thus...
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    I took one of my ILI9341 displays and replaced...

    I took one of my ILI9341 displays and replaced the SD resistors with jumpers as described above.

    I then took a Teensy 3.1 and loaded the example SD CardInfo example. It worked.

    I then loaded...
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    Actually there are many ways that shared SPI...

    Actually there are many ways that shared SPI access to multiple devices can mess with their neighbors. In the Teensy World we have a software solution called SPI Transactions that configures the SPI...
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    Are you sure you are using two separate Chip...

    Are you sure you are using two separate Chip Selects ? One for the SD card and a second one for the TFT Display. Both CS pins need separate pullups.
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    The source code for those filters in the audio...

    The source code for those filters in the audio library on your system is found in filter_biquad.cpp and filter_biquad.h.

    The comments in those files say

    // Compute common filter functions
    //...
  42. Help Needed - Proper way to read Teensy 3.6 MAC Address

    What is the proper way to obtain the preprogrammed MAC address from a Teensy 3.6 ??

    The following test program uses the previously published "read_t3_mac_word" code snippit that works well on a...
  43. There always is a lot of setup overhead to get a...

    There always is a lot of setup overhead to get a microprocessor up and running. You have to select clock sources, start internal PLLs, configure peripheral buses, configure watchdogs, and setup...
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    The Program Push Button halts your program and...

    The Program Push Button halts your program and starts a special bootloader program. The Teensy then waits for the Teensy Loader utility on your development system to upload a new program.
    ...
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    Another Background Discussion of the new SDIO...

    Another Background Discussion of the new SDIO interface on the Teensy 3.5 and 3.6 with a working code example can be found in this thread -- see post #7 and later.
    ...
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    As dfragster stated above the new Teensy 3.5 and...

    As dfragster stated above the new Teensy 3.5 and Teensy 3.6 onboard SD card utilizes a special SD card controller in the microprocessor that has dedicated SDIO lines to the SD card. You need to...
  47. The Audio CODEC on the PJRC Audio Adapter is a...

    The Audio CODEC on the PJRC Audio Adapter is a NXP SGTL5000 device. It supports only one microphone input per Audio Adapter but does support two line inputs per Audio Adapter.

    If you used...
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    const char * filelist[4] = {...

    const char * filelist[4] = {
    "Dog-barking-sound-big-dog.wav",
    // "SDTEST1.WAV"
    "SDTEST1.WAV",
    "SDTEST2.WAV",
    "SDTEST3.WAV",
    "SDTEST4.WAV"
    };

    item one - It appears you define the filelist...
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    Thank You - This new library port is appreciated....

    Thank You - This new library port is appreciated.

    I wonder if there could possibly be a typo in your readme.md in the "Pay Attention to connections" section.

    You say
    "- Teensy 3 and LC cannot...
  50. While I love to build things and see them come to...

    While I love to build things and see them come to life.... In this case, I'd probably just buy a test instrument built for the job at hand.

    See...
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