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Type: Posts; User: kjn

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  1. Replies
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    Hi Paul, I really like the smaller form...

    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...
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    I would also like to know if there is a...

    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.
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    On this topic, I've read that there is no...

    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?
  4. So the file I am using still is a full bitmap...

    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...
  5. So my benchmark was way off - it was actually...

    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...
  6. So some stats from my code: read from SD card...

    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....
  7. Hi KurtE & @mjs513, @defragster, @Paul, @Frank B...

    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...
  8. Thread: Teensy 4.0 Release

    by kjn
    Replies
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    10,853

    Just ordered 5pcs. Ditto!

    Just ordered 5pcs.




    Ditto!
  9. @prickle, I would love to see what you did...

    @prickle,

    I would love to see what you did here.
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    As soon as you have a working prototype batch I...

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

    Thanks
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    I'm keen as - would it include an MK02 or MK04...

    I'm keen as - would it include an MK02 or MK04 onboard for programming? What is the timeline for prototyping/production?
  12. Hi KurtE, There are several SPI based LCDs...

    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...
  13. Hey Guys, I was just wondering if there is a...

    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...
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    Has anyone looked at an interrupt routine in the...

    Has anyone looked at an interrupt routine in the code that gets serviced when one of the RX filters matches?
  15. I also am really interested in this - I want to...

    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...
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    You're going to struggle without a standalone...

    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/
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    3177 Feedback appreciated.

    3177

    Feedback appreciated.
  18. Replies
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    Hi All, Finally got my setup working with two...

    Hi All,

    Finally got my setup working with two teensy's talking via Can (trancievers are a TI *232 on a SOIC8 breakout):

    3176

    There is a basic priority system reading messages generated on...
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    Hey Guys, Thanks for the feedback. Certainly...

    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...
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    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...
  21. Hi Kurt, I haven't had a chance to look but...

    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?
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    Strangely I think I've had the same problem..I've...

    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....
  23. Looks like someone's taken the ILI9341_t3 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....
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