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Type: Posts; User: Johannes

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    Inthe meantime I got a ILI9488 board with working...

    Inthe meantime I got a ILI9488 board with working XPT2046 chip and got
    the same problem and found a solution: you need the latest version of XPT2046_Touchscreen from github, only then you will be...
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    Sorry for disturbing you all. I found the...

    Sorry for disturbing you all. I found the solution: on the backside of the module a small chip is missing, the one that would be connected to the T_CLK,T_CS,T_DIN,T_DO,T_IRQ pins.
    The display has...
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    XPT2046 broken?

    I have got the 3.5" ILI9488 TFT with XPT2046 Touchscreen described in the blog: https://emalliab.wordpress.com/2021/08/06/cheap-ili9488-tft-lcd-displays/

    The display works fine using ILI9488_t3...
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    At 0x400D4100 there ar 32 additional bytes of...

    At 0x400D4100 there ar 32 additional bytes of NVRAM apart from the 16-2 Bytes at 0x400A_4000. All these bytes are persistent as long as the battery is plugged in. When the battery is removed while...
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    Wow! A hidden feature! I have had a look at the...

    Wow! A hidden feature! I have had a look at the sketch in your link, and it seems to me that there are at least 16 more battery-backed bytes at this address:

    uint32_t *NVRAM_UINT32 = ((uint32_t...
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    Thanks, I have figuered it out! #include...

    Thanks, I have figuered it out!


    #include "ILI9341_t3n.h"

    ILI9341_t3n tft(255, //uint8_t _CS,
    28, // uint8_t _DC,
    255, //uint8_t _RST = 255,
    ...
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    teensy 4 SVNS nonvolantile ram

    Has anybody already accessed the nonvolantile storage of the teensy 4?
    In my understanding there are some bytes of general purpose persistent memory available that keep their value even when the...
  8. I now have upgraded to ILI9341_t3n, but I still...

    I now have upgraded to ILI9341_t3n, but I still have Arduino 1.8.13 and Teensyduino 1.53. This must be the reason why it does not work for me.
    Thanks for the opaque text output, this is much better!...
  9. I have copy-pasted your entire code into a new...

    I have copy-pasted your entire code into a new sketch, uploaded it, and it makes no difference for me:
    the output stops after "initializing ILI9341" and when I upload another sketch I have to press...
  10. My Display has no CS pin. Therefore I cannot...

    My Display has no CS pin. Therefore I cannot connect any other device on this SPI bus together with the display.
    There is a MIS pin, which I leave disconnected. This way it works well with...
  11. I did not realize there is another ethernet...

    I did not realize there is another ethernet library for teensy 4.1, thank you! I will give it a try...

    This is cool! Thank you! I already like it better than NativeEthernet, because the sketch can...
  12. I am always delighted that there are poeple...

    I am always delighted that there are poeple willing to help in this forum! Thank You!
    The code compiles well. And it works well except in the configuration given below:
    USE_NATIVE_ETHERNET and...
  13. ILI9341_t3n and NativeEthernet on teensy 4.1

    I can use NativeEthernet together with the original ILI9341_t3 library, this works well using SPI, not SPI1.
    But now I want to migrate my display to SPI1, because I need SPI for the...
  14. Thanks very much! Your detailed analyses pointed...

    Thanks very much! Your detailed analyses pointed me to the error: I did not call

    Udp.begin(localPort);

    in the setup() of my code! Therefore some internals of NativeEthernet were not...
  15. Thanks for helping me! I have simplified the...

    Thanks for helping me!

    I have simplified the sketch so that no external HW is needed. The builtin LED blinks and the blinking period should be set via Ethernet. The following sketch works, but no...
  16. All of you, thanks for your quick replies! I am...

    All of you, thanks for your quick replies! I am impressed by the quality and responsiveness of this forum!
    Spencez: the quickfix with noInterrupts() and interrupts() changed nothing. Also I use no...
  17. TeensyTimerTool & NativeEthernet on teensy 4.1

    I am successfully using the TeensyTimerTool for controlling stepper motors.
    In another Project I successfully use NativeEthernet for receiving Commands via UDP.

    Now I want to combine both...
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    I know the TimeTeensy3 example: from there I...

    I know the TimeTeensy3 example: from there I learned about Teensy3Clock.get()/set(). Changing the time back again every time after uploading a new sketch contradicts the purpose of the battery: I...
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    I have just used the teensy_loader_cli for...

    I have just used the teensy_loader_cli for uploading the hex file that I build before in using the arduino-gui. And I confirm: the RTC stays like it is and like it should be! So this is a first...
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    Ok, compiled the teensy_loader_cli as described...

    Ok, compiled the teensy_loader_cli as described in https://www.pjrc.com/teensy/loader_cli.html
    Now I want to compile my sketch into a .hex-file for loading.
    I proceeded with...
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    Thanks for the prompt reply! My PC is a linux...

    Thanks for the prompt reply!
    My PC is a linux box and already runs on UTC. I would not mind the few seconds difference between GPST und UTC.
    Only on Dos and Windows the hardware clock had been set...
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    Teensy 4.1 RTC reset

    I want to run my Teensy 4.1 on UTC or GPST for an astronomy project. In case of problems with the GPS (like testing indoors) I want to fallback to the RTC and have attached a Battery to VBAT/GND as...
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    And with a good cable and restarting dnsmasq on...

    And with a good cable and restarting dnsmasq on the linux box I finally got an IP address via DHCP!
    I am very happy and sorry to have you worried. tcpdump is a good friend.

    For those who are...
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    I replaced this with #include...

    I replaced this with


    #include <NativeEthernet.h>


    and the output now has changed to:


    23:46:45.115 -> Initialize Ethernet with DHCP:
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    Is my teensy4.1 ethernet broken?

    I have just received my new teensy 4.1 with ethernet kit, soldered everything together as described, but it does not work: the green LED stays dark, and from the "DhcpAddressPrinter" example I just...
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