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  1. I'm mainly making the changes for speed but also...

    I'm mainly making the changes for speed but also so I can utilize pixel processing instead of spinning waiting and doing nothing.

    511 max... that prob explains why the 1351 where I try and pump...
  2. OK... went for a low tec solution. Basically...

    OK... went for a low tec solution.

    Basically for the transfers I added a small delay to wait after the last DMA transfer happens. I Could get fancy and try and calculate a delay given the start...
  3. Ahhh thanks for the quick info... have to go for...

    Ahhh thanks for the quick info... have to go for a few hours but will have a look when I get back.

    Such a bummer so to speak to be so near.... 5% of time to get 95% of the code... and extra 95% of...
  4. Teensy 3.1 DMA with SPI ... small bug?? Not quite working :-(

    Hi, I thought I had DMA/SPI on the Teensy 3.1 working however noticed some graphics glitches that went away if I used any of the other SPI options I have including Teensy FIFO without DMA.

    After...
  5. Finally got DMA working on Teensy 3.1 with SPI....

    Finally got DMA working on Teensy 3.1 with SPI. Looks very promising and the code is actually quite simple. The async part is also working so I should be able to run the SSD1351 128*128 demo tonight...
  6. Trying to figure out the best way ATM to put DMA...

    Trying to figure out the best way ATM to put DMA for Teensy into my lib. The number of functions I need is quite small as IMO simpler the better.

    The key to a lot of my video processing is the...
  7. Finally got the AD7302 8 bit parallel DAC...

    Finally got the AD7302 8 bit parallel DAC soldered onto a board... and it worked.

    Have video + sound on Due so now looking at making sure it will work for Teensy 3.1 or better. I got SPI working...
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    OK... tracked down the problem. Was in some...

    OK... tracked down the problem.

    Was in some old code... the most basic function "fastDigitalWrite" had the SET/CLEAR values transposed... so basically set was unsetting and unset was setting.

    I...
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    Installed and tried the 1.37 Beta... had no...

    Installed and tried the 1.37 Beta... had no problems compiling under Visual Micro.

    Because of the problem I'm still having with SPI I tried a lot of different speeds and although all compiles and...
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    Going to install it and try soon. Been having...

    Going to install it and try soon. Been having problems with SPI... Got the same hardware working on Due, Mega2560 and Uno but getting glitches with Teensy 3.1.

    By glitches... I can't get Teensy to...
  11. font, image and video extractor "MCU Resource Maker"

    Been working on "MCU Resource Maker" for a while and now have it so it supports building fonts and other resources at various bit depths.

    It also supports multiple image frames and recently added...
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    Yes... optimizations have always been a tricky...

    Yes... optimizations have always been a tricky beast to tame. Sometimes the fastest solution defies all logic. Sometimes it seems a simple look up table (LUT) would beat a semi-complex bit of...
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    Finally got a release out. New version 2.0 of MCU...

    Finally got a release out. New version 2.0 of MCU Resource Maker has the video conversion utility built in. Had to get a new site as FFMPEG blew the size of my setup over the 10MB limit of the last...
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    Hi, still WiP but progressing quite well. I'm...

    Hi, still WiP but progressing quite well.

    I'm looking at the audio part of it at the moment however it will work with or without audio as audio will prob tax most smaller MCU's.

    Had to have...
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    Almost got my video converter front-end for...

    Almost got my video converter front-end for ffmpeg ready. Final testing phase and a few additions.

    Must admit I tried the BGR8 8 bpp mode and was surprised that it has quite good picture quality...
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    Quick update... got ffmpeg to work :) after...

    Quick update... got ffmpeg to work :) after downloading and looking at it last night.

    command line was "ffmpeg.exe -stats -i file.avi -f rawvideo -pix_fmt rgb565be -s 128x128 -vcodec rawvideo...
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    Hey, good to hear! Off memory the C64 was a 65c02...

    Hey, good to hear! Off memory the C64 was a 65c02 or a slight variation of the straight 6502? I found an Apple ][ emulator with virtual disks and was gob-smacked by how faithfully it played...
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    If you want to write a C64 emulator I'd have a...

    If you want to write a C64 emulator I'd have a quick look at the MAME source code. I looked at it years ago and it was very well organized. I use to program Apple ][ 6502 assembler in 1983 when 14 so...
  19. Thread: K66 Beta Test

    by hoek67
    Replies
    1,558
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    512,198

    OK ... great info! From what I can see the 2nd...

    OK ... great info! From what I can see the 2nd USB is offset 0.05" in both directions.

    I think I finally have a schematic with pins that can be used. Some sets of pins will just get broken out as...
  20. Thread: K66 Beta Test

    by hoek67
    Replies
    1,558
    Views
    512,198

    Anyone able to point me to best info on the...

    Anyone able to point me to best info on the 3.5/3.6 pin positions for the back?

    I can't see what the pins are vertically between 38 & 27 (5 pins).

    Also the 5 pins horizontal slightly above pins...
  21. Thread: K66 Beta Test

    by hoek67
    Replies
    1,558
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    512,198

    Utilizing all pins on a custom breakout

    So many options... SMDheader underneath was looking good but I saw it may may be prone to lifting or damage if swapping the MCU in and out frequently. Maybe a bit of love from a hot glue gun can make...
  22. Thread: K66 Beta Test

    by hoek67
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    1,558
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    512,198

    Ahhhh... great! Thanks for the quick reply. I had...

    Ahhhh... great! Thanks for the quick reply. I had been making a shield for the Due but will use it as a learning experience and make the same for the Teensy 3.5/3.6. Will have to figure out how to...
  23. Thread: K66 Beta Test

    by hoek67
    Replies
    1,558
    Views
    512,198

    8 bit Parallel data port access

    Hi, just a quick query.

    Just wondering what pins would be best for 8 bit parallel data lines. Should be 8 continuous pins on the same port somewhere that can be spared.

    Been creating a lot of...
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