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Type: Posts; User: KrisKasprzak

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  1. Replies
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    Oh well. I got the buffer chip (74ahc1g125)...

    Oh well.

    I got the buffer chip (74ahc1g125) and wired it up. The SD card works with display MISO connected so the buffer is disconnecting MISO correctly, but when code request data from the...
  2. Interesting project. I can't imagine the time...

    Interesting project. I can't imagine the time invested in building that chitty-chitty-bang-bang like contraption. However, given his views, I'll guess he is getting around $8/1000 views so 4.4...
  3. I don't think the Teensy clock is aware of day...

    I don't think the Teensy clock is aware of day light savings time, hence you will need to add that based on known time changes.

    Odd on #2, my sync is right on
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    If you could be more specific on what doesn't...

    If you could be more specific on what doesn't work we might be able to help you out.
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    If you are trying to use an SPI display over a...

    If you are trying to use an SPI display over a wire, i'm doing the same. I'm using Cat5 ethernet cable and have been able to use cable distance of 20 feet--however my standard setup is around 4 feet...
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    If you can move to use the ILI9341_t3, here's a...

    If you can move to use the ILI9341_t3, here's a video that shows how to create and use custom fonts from Windows TTF fonts. Shown is how to use a utility that let's you convert fonts, adjust kerning,...
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    I think I have the issue solved.... I have...

    I think I have the issue solved....

    I have some 2.2, 2.4, 2.8, 3.5" TFT's where MISO outputs data some displays where it doesn't.

    Have a look at the picture, problematic displays
    1. The...
  8. Replies
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    TFT MISO issues continue

    I have a Teensy 3.2 connected to a 3.5" TFT using SPI with ILI9488 driver. The display works fine but when running the graphicstest9488.ino program the code runs but getting data back returns...
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    And that modification works like a million...

    And that modification works like a million bucks--at least for the 10 or so displays i've used.
  10. Replies
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    The SPI are separate for SD, Touch and the...

    The SPI are separate for SD, Touch and the display.

    Not sure you can see it in this image
    ...
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    Tri-state buffer, on all MISO lines?

    All,

    I have a 3.5" TFT display and I need to use the boards SD card, display and touch. Unfortunately I'm running into the inability to use display MISO and the SD card. The SD and the display SPI...
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    Thanks to all, i'll try some of the suggestions.

    Thanks to all, i'll try some of the suggestions.
  13. Replies
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    a float = 223.98 prints 223.9799957

    I'm trying to convert a float to char -- long story.
    goals

    float char
    1.2 1.2
    23.007 23.007
    1234.1 1234.1


    but
  14. Replies
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    @econjack welcome home. The Teensy is an...

    @econjack welcome home.

    The Teensy is an outstanding MCU and this forum is the best. I'm sure you will be called on.

    At the risk of speaking for Paul, perhaps a book branded for the Teensy?
  15. nice job. I too am using these load cells but...

    nice job. I too am using these load cells but with the HX711. We (my high school race car team) built a dynamometer to test our electric motors. I get a lot of noise from the load cell and we're...
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    Posted, have a look. ...

    Posted, have a look.

    https://youtu.be/YNUbvpTaaCY
  17. Your wish has been granted. Get the latest lib...

    Your wish has been granted.

    Get the latest lib here: https://github.com/KrisKasprzak/ILI9341_t3_controls


    1. New methods on vertical and horizontal sliders

    xxx.setHandleSize(int val); //...
  18. I'm currently communicating between a Teensy 3.2...

    I'm currently communicating between a Teensy 3.2 and an ESP8266--data is going from Teensy to ESP, here's what I did

    1. i'm using UART for communication (Teenst Rx - ESP Tx and vice versa)
    2. i...
  19. dang....well done.

    dang....well done.
  20. what range do you need? How much data do you...

    what range do you need? How much data do you anticipate sending?
  21. Teensy 3.2 + ESP-01 and using AJAX to update a page--stuck

    OK gang,

    I'm close to having a Teensy 3.2 connected to a cheap ESP-01 Wifi module working where the code uses AJAX to update specific data on the web page. I actually have all this working with...
  22. I can't comment on using I2C but i have...

    I can't comment on using I2C but i have transferred data between a Teensy and Arduino via the serial port. However I did have to use EasyTransfer lib to keep my data in the structure i used to...
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    I use nearly the same display a HX8357 3.5" from...

    I use nearly the same display a HX8357 3.5" from Adafruit and currently I use the ILI9341_t3 lib--and it's works like a million bucks. As you found just need to change the display size in the .h file...
  24. Use this FlickerFree library to get smooth text printing to displays

    Add flicker free display updates to your Teensy projects using virtually any display. This free library will let you draw text and numbers using non-proportional fonts and update the data without...
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    @spook. I'm in the process of creating a YouTube...

    @spook. I'm in the process of creating a YouTube video of this font editor and some results--of course citing you as the creator. I would like to include a formal link to the download but the github...
  26. not sure how it happened, but only part of the .h...

    not sure how it happened, but only part of the .h and .cpp files uploaded. I just re-uploaded the files. Please download again.
  27. Cartesian graphing for ILI3941_t3 projects

    Add a Cartesian graph capability to your Teensy MCU projects. This library lets you plot up to 10 points and has auto screen updates when x exceeds the scale. You can also dynamically update the...
  28. "PrintScreen" and "DrawBMP" for ILI9341_t3 displays

    All,

    If you have ever wanted to capture a screen of a display and save it to and SD car, this free library will let you add useful functions like print screen and draw BMP to your Teensy projects....
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    wow, that is a piece of art.

    wow, that is a piece of art.
  30. I'm now trying this on Win7 and here's my...

    I'm now trying this on Win7

    and here's my compile error (witth Serial window up at compile time).

    Now able to open COM50 (Windows said this port was ready before it was actually...
  31. I've installed this tool following all...

    I've installed this tool following all instructions, but i really don't understand how to use this. I get a menu option USB type dual, and I get a cmd window upon upload, so I guess it's installed....
  32. I've not messed with CurtE's lib ILI9341_t3n, but...

    I've not messed with CurtE's lib ILI9341_t3n, but i believe it has a way to use DMA to get crazy fast updates. Have a look at the demosauce example that comes with the ILI9341_t3n lib. It shows very...
  33. for the needle drawing, since you always start at...

    for the needle drawing, since you always start at the same location, I think you can create an equation for the needles line (i've not studied the code but it will be something like y=mx + b. So for...
  34. Are you sure not solder got on any of the traces?...

    Are you sure not solder got on any of the traces? How did you test for shorts? A continuity meter? I've soldered a few headers (3.2 and the mighty 4.1) and all worked for me.
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    @bitbank, welcome to the family! I think you will...

    @bitbank, welcome to the family! I think you will find this community super helpful and super friendly.

    @bitbank and @kurtE I really appreciate your hard work and optimizations and admire your...
  36. dude.... well done!

    dude.... well done!
  37. I have uploaded a new PPT (fixed up some code)...

    I have uploaded a new PPT (fixed up some code) and uploaded the created .ino file.
  38. I've had one of those modules working with my...

    I've had one of those modules working with my 3.2, not sure what the issue could be, i used the adafruit libs

    #include <Adafruit_WINC1500.h>
  39. Utility to convert PowerPoint slides to ILI9341_t3 code

    All,

    If you use ILI9341_t3 libs and common screens, you may find it tedious in writing the display screens, especially if you have lots of graphical items like boxes and text.

    I find it easier...
  40. Are your lights connected in parallel? If so I'm...

    Are your lights connected in parallel? If so I'm not sure I see the issue. Can you put a current sensor to the supply for each light? I'm not familiar with that current sensor, I use ACS758's but as...
  41. All thanks for the replies. The R designation is...

    All thanks for the replies. The R designation is a great way for one to "write at will" when creating huge chars.
  42. What is the R used for in a const char definition?

    All,

    I have working code that creates a web page and displays data via AJAX. No issues but a question?

    in my we page char definition there is and R character. Anyone know what it's used for?
  43. Replies
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    I use the CR2032 and all you need to do is solder...

    I use the CR2032 and all you need to do is solder the crystal and add some code.

    Here's the code I use

    // global location
    #include <TimeLib.h> // teensy time library...
  44. Maybe so, but I can't see to program the esp or...

    Maybe so, but I can't see to program the esp or monitor serial activity if wires are connected to Rx and Tx.
  45. OK i have a plan and a prototype is working....

    OK i have a plan and a prototype is working. Refresher as to what i'm trying to do:

    1. remote telemetry on a race car sends performance data to the pit where performance data is displayed on an...
  46. I can try hardware serial unfortunately Serial1...

    I can try hardware serial unfortunately Serial1 is for USB if i recall. I've got USB connected so i'm forced to use Sofwareserial.

    However.

    The suggestion to use easyTransfer lib works. I'm...
  47. I will try the easytransfer library tomorrow

    I will try the easytransfer library tomorrow
  48. tried this as well. #define PACKED_STRUCT ...

    tried this as well.

    #define PACKED_STRUCT struct __attribute__((packed))
    struct Test {
    uint16_t Data1;
    uint16_t Data2;
    uint16_t Data3;
    } ;

    Test MyData
  49. Well still no go... 1. i've tried every baud...

    Well still no go...

    1. i've tried every baud in the book the faster the less corrupt
    2. I did try sizeof(uint16_t) on both MCU, both returned 2 bytes
    3. I did try sizeof(MyData) on both MCU,...
  50. Yet another issue I'm struggling with sending data to ESP8266 via serial line

    Still fighting with these ESP units. I'm trying to send data from a teensy 3.2 to an ESP8266. From the teensy if I Serial3.Println("Teensy is better that ESP"); all is well. if i send a struct, data...
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