Search results

  1. K

    Qt for MCUs

    There are a few users of Qt in this forum. They have just released a toolchain for MCU's, of which the Teensy4 Beta (i.MX RT1050) is supported. https://www.qt.io/blog/qt-for-mcus-1.0 I can imagine if this ever became an option on the Teensy4 platform, with the multitude of LCD's and drivers...
  2. K

    Future Teensy features & pinout

    Hi Paul, I really like the smaller form factor of the T4.0 - my only request would be easier access to the SDIO pins, but I am managing fine so far. I'd probably be very interested in a 4.1 (3.6FF) variant it anything became available. If you were doing a bigger version, which the RT1170...
  3. K

    Does Teensy 4.0 have an analog ground pin?

    I would also like to know if there is a programmable or precision internal vref. I read the 1620 data sheet but it was unclear how the reference function works - or if it was indeed programmable.
  4. K

    Does Teensy 4.0 have an analog ground pin?

    On this topic, I've read that there is no external VREFh and there is only one comparison voltage, which is the 3v3 supply source. Is this correct?
  5. K

    Playing around with yet another version of ILI9341_t3 library (ILI9341_t3n)

    So the file I am using still is a full bitmap with header, but colour depth is 16bit (so not technically an "official" bitmap). I used some conversion utilities (and a few programming tricks) from the ILI9341_due library, which was forked from the ILI9341_t3 library many years ago...
  6. K

    Playing around with yet another version of ILI9341_t3 library (ILI9341_t3n)

    So my benchmark was way off - it was actually 66ms to load a 150kB file from the sd card to the frame buffer. Time to flush the framebuffer seems very constant at 44ms. I went back into my code and did some more optimisation, I now load a whole row of pixels (320 @ 16bpp) in one hit and changed...
  7. K

    Playing around with yet another version of ILI9341_t3 library (ILI9341_t3n)

    So some stats from my code: read from SD card to frame buffer = ~22ms. (this is a 240x320 565 formatted bitmap - using SDFat on the 3.6 SDIO port) flush frame buffer to display (dma) = ~44ms. = 66ms or 15FPS - but there is strobing if I use single shot DMA to refresh the screen EDIT: I'll...
  8. K

    Playing around with yet another version of ILI9341_t3 library (ILI9341_t3n)

    Hi KurtE & @mjs513, @defragster, @Paul, @Frank B ... So now we have a released T4.0, it looks like there is room all the way up to 800x600x24bpp frame buffer, still with ~512KB ram left over for applications. This is larger than any available SPI display I could find. At this point is it...
  9. K

    Teensy 4.0 Release

    Just ordered 5pcs. Ditto!
  10. K

    ILI9488_t3 - Support for the ILI9488 on T3.x and beyond...

    @prickle, I would love to see what you did here.
  11. K

    Teensy 3.6 "Pro" Feedback

    As soon as you have a working prototype batch I will definitely order a few for trial. Thanks
  12. K

    Teensy 3.6 "Pro" Feedback

    I'm keen as - would it include an MK02 or MK04 onboard for programming? What is the timeline for prototyping/production?
  13. K

    Playing around with yet another version of ILI9341_t3 library (ILI9341_t3n)

    Hi KurtE, There are several SPI based LCDs that use almost identical setup and structure to the ILI9341; for example the ST7796S. What is the practicality of seperating out the graphical and HAL layers from the device drivers and making the library "multi-use"? Or is it more practical to fork...
  14. K

    Highly optimized ILI9341 (320x240 TFT color display) library

    Hey Guys, I was just wondering if there is a way to either force the new fonts to display as fixed width or when they are generated, adjust the parameters so they are a fixed width font? The new fonts work really well just the fixed width is kind of tripping me up. Cheers
  15. K

    Teensy 3.1 and CAN Bus

    Has anyone looked at an interrupt routine in the code that gets serviced when one of the RX filters matches?
  16. K

    Teensy 3.1 and K20 FlexTimer config for FreqMeasure

    I also am really interested in this - I want to measure 4 wheel speed sensors on a car with my teensy - I need about 1Hz to 5Khz. This library is going to be the best way to achieve that but I'd need 4 pins. I'd have no idea where to start to properly re-factor the library.
  17. K

    Serial to VGA connection

    You're going to struggle without a standalone graphics processor, there is an Australian company that might sell what you seek: http://www.4dsystems.com.au/product/uVGA_III/
  18. K

    Teensy 3.1 and CAN Bus

    Feedback appreciated.
  19. K

    Teensy 3.1 and CAN Bus

    Hi All, Finally got my setup working with two teensy's talking via Can (trancievers are a TI *232 on a SOIC8 breakout): There is a basic priority system reading messages generated on the bus and displaying them on the lcd. I have a few questions about the mask format for the global mask...
  20. K

    SPI Bus - 5V and 3V3 Devices

    Hey Guys, Thanks for the feedback. Certainly the datasheet for the Freescale chip indicates that when CS is asserted Low all other SPI pins go to High-Z. The ILI9341 also suggests that it will also follow this behaviour. However I think from a safety standpoint I will either bitbash on...
  21. K

    SPI Bus - 5V and 3V3 Devices

    Hi, So I've run into a little problem and I'm trying to make sure everything is ok before I proceed. I plan to have 3 devices on the T3.1 Hardware SPI bus. 1x ILI9341 2.2" LCD 1x SDCard 1x Freescale 33977 The ILI9341 and SD card are both 3v3 Logic devices, however the 33977 is a 5V logic...
  22. K

    Highly optimized ILI9341 (320x240 TFT color display) library

    Hi Kurt, I haven't had a chance to look but the Library I linked above "ILI9341_due" now has a screenshot method, is it implemented using your read pixel function?
  23. K

    Teensy 3.0/3.1 unresponsive and overheating?

    Strangely I think I've had the same problem..I've been playing with my t3.1 for a few weeks. I was prototyping on another part of the breadboard and I had some magic smoke escape from a transistor. My teensy from then on was no longer functioning. I had no I/O on the teensy hooked up only GND...
  24. K

    Highly optimized ILI9341 (320x240 TFT color display) library

    Looks like someone's taken the ILI9341_t3 library and made some more tweaks for the DUE. The fonts and 565 bitmap display seem to have improved the speed over the current implementation quite a bit. http://marekburiak.github.io/ILI9341_due/
Back
Top