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  1. THANK YOU KurtE. The SPI library you modified...

    THANK YOU KurtE.

    The SPI library you modified a few days ago solved the SD write problem. All I did was replace the old SD library and the SD card is now working without problems ALONG with the...
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    On the recommendation of Bill Greiman, I used the...

    On the recommendation of Bill Greiman, I used the new SPI library which KurtE modified a few days ago and that solved the problem.
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    Hello Bill, Thank you very much. Your help...

    Hello Bill,

    Thank you very much. Your help was IMMENSE. I also wish to thank KurtE for the change he made in the SPI library because that solved the SD write problem.

    I am happy to report...
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    Not meaning to put words in Bill's mouth, but my...

    Not meaning to put words in Bill's mouth, but my understanding is that the SDFat-beta is for supporting the T4.
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    Will do. Thank you.

    Will do. Thank you.
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    Thank you Bill. I will makes these changes and...

    Thank you Bill.

    I will makes these changes and try as soon as I return from my trip on Saturday.

    Both you and mjs513 have ran the SD code (but without the Ethernet hardware) without any...
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    Thank you @mjs513. The SPI library change is...

    Thank you @mjs513. The SPI library change is potentially great news. I will try the new library first. Can you tell me where does one download it from? The SPI library referenced in the PJRC...
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    Thank you very much @mjs513. I am using the...

    Thank you very much @mjs513.

    I am using the WIZ850 (not 820). I am also using Rev.2 (latest) of the SD board.

    Also, in all my testing, I have pulled pin 10 high. So it looks like there is...
  9. Hello @mjs513: Thank you for responding as...

    Hello @mjs513:

    Thank you for responding as this problem has been extremely frustrating to me. I am glad to hear that the SD card is working.

    Because my Wiznet is soldered to the SD attachment,...
  10. Hi Bill, Do not celebrate just yet! Try...

    Hi Bill,

    Do not celebrate just yet!

    Try running my code that is at the bottom of the link below. After about 60 writes, the file writing will crash.
    ...
  11. Hello @ MichaelMeissner While no solder expert...

    Hello @ MichaelMeissner

    While no solder expert :-), I suspect a software rather than a hardware issue for the problems I am having with my SD installation with the T4.

    Commenting out the i2c...
  12. I had explained it in my post. Everything is...

    I had explained it in my post. Everything is well connected and I am using PJRC's SD card along with an 85io. When both SD and Ethernet are active, the SD crashes after a few writes.

    When...
  13. Any chance this is related to my post below: ...

    Any chance this is related to my post below:

    https://forum.pjrc.com/threads/57478-Teensy-4-0-SD-Buggy-Implementation
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    Good Evening Paul, Any luck finding out what...

    Good Evening Paul,

    Any luck finding out what is causing the SD problems? Per your request, I cleaned the code and deleted all references to non-Teensy libraries but I am still having the same...
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    Hello Paul, The display is not needed. I had...

    Hello Paul,

    The display is not needed. I had not taken it out thinking that an i2c display will not affect the SPI peripherals.

    When I stripped the display code, the same problem persists. ...
  16. Sorry for the double post. A more detailed post...

    Sorry for the double post. A more detailed post can be found at:

    https://forum.pjrc.com/threads/57478-Teensy-4-0-SD-Buggy-Implementation
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    Sorry for the double post. A more detailed post...

    Sorry for the double post. A more detailed post can be found at:

    https://forum.pjrc.com/threads/57478-Teensy-4-0-SD-Buggy-Implementation
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    Even if you comment out the Ethernet code, the...

    Even if you comment out the Ethernet code, the problem occurs but this time after writing about 30 files ....

    With the Ethernet code, it crashes after a few files are written.
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    Hello Paul, I have taken out all the...

    Hello Paul,

    I have taken out all the extraneous parts of my code and was able to duplicate the problem. I have also attached the directory image and a trace showing the files being saved to the...
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    Thank you very much Paul and apologies for the...

    Thank you very much Paul and apologies for the second post. I will research how to link those posts.

    I will also edit the code to use the SD library and will post it here per your request.
  21. Teensy 4.0: Ethernet Library causing SD Errors

    This problem has been reported in:

    http://forum.pjrc.com/threads/57478-Teensy-4-0-SD-Buggy-Implementation

    I have been having lots of problems with my SD card attachment which is connected to a...
  22. Thank you KurtE for your prompt answer and...

    Thank you KurtE for your prompt answer and attempt to help.

    This issue is most likely "Ethernet-library" related.

    I have posted about a potential bug in the Ethernet library in:
    ...
  23. Hello KurtE: I have been working hard on...

    Hello KurtE:

    I have been working hard on implementing your recommendations above but in order to check my results, I need both Ethernet and SD. I have been unable to resolve the problem of why...
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    I have isolated the reason to the W5500 chip. ...

    I have isolated the reason to the W5500 chip.

    When I did not use Ethernet.begin, the SD card worked 100% of the time.

    When I executed the following statements before writing to the SD card,...
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    Teensy 4.0 SD Buggy Implementation

    I have been having lots of problems with my SD card attachment which is connected to a Teensy 4.0 along with a WIZ850IO.

    I have followed all the guidelines regarding setup. I have also tried...
  26. Thank you JBeale. The culprit was the ...

    Thank you JBeale.

    The culprit was the
    while(!Serial) statement in the library I was using.

    The only problem remaining now is the SD behavior on the T4 .... :-).
  27. Thank you @defragster. Your input helped me...

    Thank you @defragster. Your input helped me debug further.

    You were right about the culprit.

    I found out that the library I am using has the Leonardo while (!Serial)

    Thanks again.
  28. Thank you @defragster. I appreciate your prompt...

    Thank you @defragster. I appreciate your prompt help to this frustrating problem.

    Here is my code. BTW, when USB cable is connected, the board does pull an IP Address.


    void setup()
    {
    ...
  29. Teensy 4 : Sketch does not run unless Serial Monitor is open

    I compiled a sketch and it is running fine.

    I then close the Arduino IDE and disconnect power to the Teensy 4 (It is powered via Vin).

    When I reconnect power to the board, nothing happens...
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    Teensy 4.0 SD Corruption

    I am using the PJRC's SD board with a Teensy 4 and running Teensduino 1.47. I am also using Teensy's SD library. The hardware consists of a Teensy4, Wiznet WIZ850io and SD card.

    I am...
  31. Thank you very much @kurtE. Will try it.

    Thank you very much @kurtE.

    Will try it.
  32. Thank you for your help. Please see attached...

    Thank you for your help.

    Please see attached code.
  33. Code could not convert "Serial" from 'usb_Serial_class" to 'HardwareSerial&'

    I have a .h file as shown below.

    In compiling, I am getting the compile error from the highlighted statement:

    could not convert 'Serial' from 'usb_serial_class' to 'HardwareSerial&'
    ...
  34. Teensy 4 - Optical Character Recognition (OCR)

    With the awesome speed of the Teensy 4.0, is there an OCR (Optical Character Recognition) library that can be used with it?

    I have a project where I need to read a very limited amount of text (20...
  35. Thank you @bicycleguy.

    Thank you @bicycleguy.
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    Thank you @defragster.

    Thank you @defragster.
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    Teensy 4.0 Reset pin

    Does the Teensy 4.0 have a Reset pin which if pulled low would restart the micro?

    Which pin?

    Thanks in advance.
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    Thank you very much Mike. I appreciate your help...

    Thank you very much Mike. I appreciate your help and timely responses.

    Yes indeed, this should go to a different thread. I will going forward.
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    Hello Mjs513, I have done some reading on the...

    Hello Mjs513,

    I have done some reading on the Arducam. In my project, I need to take a snapshot and then analyze a region for the most dominant color within that region. So basically read RGB...
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    Thank you @MichaelMeissner. This is good advice....

    Thank you @MichaelMeissner. This is good advice. Indeed, I have a couple of devices that would not work without those resistors. In the case of the Arducam, apparently it has the resistors on...
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    Thank you. I uploaded your sketch and got...

    Thank you. I uploaded your sketch and got "OV2640 detected.". I had not connected the i2c lines before thinking that it was operating as an SPI device.

    Now both sketches are working. I can t...
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    Thank you very much. The CS pin was incorrect, I...

    Thank you very much. The CS pin was incorrect, I switched it to 10 (T4) and now it works.

    ================================

    After I recompiled the ArduCAM_Mini_2MP_Plus_functions example, it...
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    Hello mjs513, I received my 2MP camera today....

    Hello mjs513,

    I received my 2MP camera today.

    In trying the ArduCAM_Mini_2MP_Plus_functions example, I am getting the error:

    00:32:04.227 -> ACK CMD SPI interface Error! END

    In trying the...
  44. Which Ethernet library does the compiler pick when Arduino and Teensy have their own?

    This is a very basic question but I never ran into this problem because I am new to Teensy. I did an internet search but this time too much information on this topic was not helpful!

    Arduino has...
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    Thank you Sir.

    Thank you Sir.
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    Hello mjs513: Is this the model you tested...

    Hello mjs513:

    Is this the model you tested with?

    https://www.robotshop.com/en/arducam-mini-camera-module-shield-2-mp-ov2640-arduino.html

    Can you share what libraries can be used to...
  47. Thank you very much KurtE for your time and...

    Thank you very much KurtE for your time and input. I really appreciate your time in both helping and educating me.

    I will take a look at the code tomorrow.
  48. In trying to implement your recommendation, I...

    In trying to implement your recommendation, I found that the sensor's library responds each time with a 600-byte structure.

    http://playground.arduino.cc/Code/Leddar/

    The library is...
  49. Thank you very much Paul, defragster and KurtE. ...

    Thank you very much Paul, defragster and KurtE. You have all gone beyond the call.

    I will be trying this on a T4 and will update you of my progress.

    Thanks again for your time.
  50. Thank you KurtE. Fair enough I was just...

    Thank you KurtE. Fair enough I was just reluctant of making my message too long. Here is the message structure.

    1) Each sensor sends a message continuously. Each message has 10 structures. ...
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