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Type: Posts; User: KrisKasprzak

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  1. Replies
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    Yep, that's my graphing function. I think...

    Yep, that's my graphing function. I think supporting other displays is relatively easy. Just as long as the lib leverages Adafruit_GFX, only the display data type in the object creation needs to be...
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    Need help writing a library

    All,

    I have a neat graphing function that plots stuff like temperatures or voltages over time. The problem is a big ugly function and is hard to update to draw say 2 variables. I can re-code it...
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    not a fan of these units, but just passing along...

    not a fan of these units, but just passing along

    https://www.youtube.com/watch?v=o8Ever-0tss&list=PLPHBVy6vaT418gVRVzMcq00Ip49w0zeW_&index=2
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    that looks like the same ones I use. drawing...

    that looks like the same ones I use. drawing buttons is more dependent on the library and not the display. The library used is ili9341_t3. optimized for the teensy and supports Adafruit_GFX...
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    The 3D printer I use is a makerbot we have at...

    The 3D printer I use is a makerbot we have at work. There are several online printing services that are very affordable. The software I use is Solid Edge and you can get a free download (student...
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    I use the heck out of the 2.4" and 2.8" inch...

    I use the heck out of the 2.4" and 2.8" inch TFT's (ILI9341) and HX8357 (3.5 inch units). I use all aspects such as graphics, SD usage and touch. I wish there were larger more affordable units. I use...
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    I use the heck out of these units....

    I use the heck out of these units. http://www.ebyte.com/en/product-class.aspx?cid=1&pid=1

    I find them low power, great range, and reliable. The company has a wide variety of types. I use the UART...
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    What are you looking at transmitting? Data from...

    What are you looking at transmitting? Data from one Teensy to another? I have a pretty reliable setup that sends data using some LoRa units.
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    I use a Teensy 3.2 and I use dual SDI devices all...

    I use a Teensy 3.2 and I use dual SDI devices all the time 1) an ILI9341 display and 2) and SD card. Both are on the same SPI lines but different CS of course. Works fine in my data logging...
  10. yep setting the teensy3clock was it, it now works...

    yep setting the teensy3clock was it, it now works like a million bucks.




    setTime(rHour, rMinute, rSecond, rDay, rMonth, rYear);
    Teensy3Clock.set(now());
  11. OK the plot thickens...while I eagerly wait for...

    OK the plot thickens...while I eagerly wait for some assistance in manually programming the RTC and saving the setting, I ran a sketch to program the date/time based on the serial data from the...
  12. Can't get RTC to save time and remember on power up

    All,

    I have a Teensy 3.2 with a soldered crystal and when powered via usb it seems to store and display correct time.

    I have a 3 volt batter + connected to the VBAT and ground connected to GND...
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    looks reasonable. not sure how you calculated R3...

    looks reasonable. not sure how you calculated R3 R4 and CS. The chosen values may filter out fast pulse counts. I've got a similar application where my sensor can't ready above ~2300 pules per min...
  14. ahh...i've yet to figure out how to do a layered...

    ahh...i've yet to figure out how to do a layered board in my garage. Single is easy but very limiting.
  15. any desire in printing your own board?

    any desire in printing your own board?
  16. Great, thanks for putting this together. It looks...

    Great, thanks for putting this together. It looks well documented.
  17. @tonton81. can you ellaborate on "cranking" can...

    @tonton81. can you ellaborate on "cranking" can reset MCU? I have a data logger in an electric go kart and use a simple buck converter to power a Teensy 3.2 It works well, but every once in a while...
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    Welcome to the club. I too switched from Arduino...

    Welcome to the club. I too switched from Arduino to Teensy and have been wildly happy with that move
    1. better product
    2. better help from the Forum (and friendlier)

    I have found nearly 100%...
  19. PS the PCB image is my version 3.0 but the boards...

    PS the PCB image is my version 3.0 but the boards shown are a previous incarnation and don't match exactly
  20. https://www.4pcb.com/free-pcb-layout-software/?gcl...

    https://www.4pcb.com/free-pcb-layout-software/?gclid=Cj0KCQjw2IrmBRCJARIsAJZDdxAEyUDNbdrkcwcBdW2COMqUK1QScqQj6wlCqV03ElmoyRKE5A13BpwaAldREALw_wcB
  21. The software I use is PCB artist and is a free...

    The software I use is PCB artist and is a free download. I built my own libraries for displays, Teensy 3.2, buck converters, and several other components so creating new designs is simplified. In my...
  22. I'm now printing my own PCB boards and using...

    I'm now printing my own PCB boards and using sockets to mount my Teensy 3.2. Designing and printing PCB's is actually very easy to do. On medium complex projects I can generally design / etch / drill...
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    well done.

    well done.
  24. What version of Windows are you using and do you...

    What version of Windows are you using and do you have any virus checking software running?
    I have Win7 and McCafe. I can rarely upload code to my Teensy 3.2 unless I disable real-time scanning.
    ...
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    Thanks to all, We're using a Teensy 3.2....

    Thanks to all,

    We're using a Teensy 3.2. defragster--will look at that code tonight. All my time var are volatile unsigned longs . I've been looking for a direct access to the chips timer as it...
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    JWScotSat, thanks for chiming in. Our v1.0...

    JWScotSat, thanks for chiming in.

    Our v1.0 used your approach, the issue was that speed resolution based on our wheel diameter is 3.31 MPH (too low for our needs)--this is with a 1 second update...
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    very cool!

    very cool!
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    Issue with micros() in an ISR

    All,

    I have a data logger that is being used to measure wheel RPM (0 to about 500 RPM) in and electric go cart. I'm using an infrared sensor and for the most part it works very well. When the...
  29. Unfortunately i'm using every one of the 8 wires...

    Unfortunately i'm using every one of the 8 wires in CAT5 for display and a few buttons--I sure could use some more conductors.
  30. update from my data logging saga... based on...

    update from my data logging saga...

    based on tips from above (thanks randomvibe) , i'm now able to send data to my display (2.4 inch TFT) reliably. Recall my data logger is in a small electric...
  31. @linarism, Thanks for the tips. I'm having...

    @linarism,

    Thanks for the tips. I'm having severe write issues with my data logging system. I'm writing around 126 characters every second to an 8GB sandisk card. I'm using good old fashion SD.h...
  32. Regarding the displays I generally connect the...

    Regarding the displays I generally connect the backlight pin to a digital pin, that way I can turn the display on/off or even write PWM to the pin to control brightness--my favorite is to use the...
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    What speed are you compiling your code to run?...

    What speed are you compiling your code to run? I've used the SD card boards (with level shifters) and if compiled above 72 MHZ, the SD card could not be recognized. At 72 MHZ, the card reader worked...
  34. looks like i got it working ino file...

    looks like i got it working

    ino file
    Transceiver.GetTheData(&TheData, sizeof(TheData));


    .h file
    void GetTheData(const void *TheStructure, uint16_t size_);

    .cpp file
  35. All, I could really use some more complete...

    All,

    I could really use some more complete help here, a line of code may help an experienced c programmer but it's making me more confused. I'm not a c programmer and have no idea how to implement...
  36. Thanks Jarkkol, I implemented and got the code to...

    Thanks Jarkkol, I implemented and got the code to compile, but it doesn't work. I can pass in a data structure but the reported sizeof is 2 bytes. I'm told that the size of “void *” is the size of a...
  37. Help writing a library (passing in an unknown structure for serial writing)

    All,

    I've been using small UART based transcievers (E50-TTL-100) with great success. I can read / write and even program them. RadioHead library will work with and E32, but I want different...
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    I've controlled display brightness with my 2.8"...

    I've controlled display brightness with my 2.8" TFT displays, and it is that easy. Just connect a PWM capable pin from your teensy to the lite pin on the display (my displays usually say LED for the...
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    Yea, this tool is a total home run.

    Yea, this tool is a total home run.
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    Thanks my display is one from Amazon, and based...

    Thanks my display is one from Amazon, and based on the ILI_9341. I'm using the ILI_9341_t3 display driver and UTOUCH.h https://github.com/dgolda/UTouch/archive/master.zip

    I'll just add some...
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    I did a bit more digging and found the touch...

    I did a bit more digging and found the touch chips datasheet. Looks like IRQ pin is an output for the purpose I need--it's to trigger when a pen presses the display. Only issue is the output is not...
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    TFT displays and interrupts

    All,

    I'm using some 2.8" TFT displays with my Teensy 3.2 and can get them working with touch, buttons, SD,etc. However I have several places that i want to be able to push a button on the screen...
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    Not sure how i missed that one. Up and running...

    Not sure how i missed that one. Up and running again.

    How many beers do I now owe you?
  44. I too started out on Arduinos (using them for...

    I too started out on Arduinos (using them for data loggers mainly) but after spending dozens of hours trying to get code to fit into 32K, i abandoned them and move to Teensy. My largest project has...
  45. What PWM frequency are you driving the mosfet...

    What PWM frequency are you driving the mosfet (Arduino through U1) with 1.7kHz, how are you getting that? I see no timer divisor capable of getting that frequency. Maybe add a current limiter between...
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    Can't install Teensydiono

    I had to reinstall my Teensyduino and when I get to the "Select Folder Step" the Next button is disabled. oddly the default folder i c:\users\administrator.....

    Even if I select the arduino folder...
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    UPDATE: I got my "bad" displays to read a...

    UPDATE:

    I got my "bad" displays to read a pixel. Turned out it was a bad solder joint on one of the components on the back of the display. As a last ditch effort i heated up all resistors and caps...
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    PS i looked in the lib and withing the .cpp file...

    PS i looked in the lib and withing the .cpp file within the readRect function


    SPI.beginTransaction(SPISettings(2000000, MSBFIRST, SPI_MODE0));

    I tried making the 2000000 to as low as 50000,...
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    I can't get readRect to even work, but then again...

    I can't get readRect to even work, but then again i struggle with using pointers---see any errors in my code snippet? An image of my PCB is attached, with a small note to where MISO is. Oddly one...
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    Need some more help.... My PrintScreen() works...

    Need some more help....

    My PrintScreen() works like a champ, but only on certain displays. I have have 2 different 2.8" tft based on ILI9341 chips

    this display returns 65535 upon a call to...
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