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  • Eka's Avatar
    10-12-2018, 08:43 AM
    I've been debugging as CFS, farming, time and thunderstorms have allowed. Some long tests got stopped by power outages. The halting of the serial IO is the same issue as in the Lockups with FastLED & TeensyThreads...
    16 replies | 483 view(s)
  • Eka's Avatar
    10-12-2018, 08:42 AM
    Lockups of the serial IO become more likely to happen when I use threads.delay() than when just using threads.yield(). I think a long interrupt happening at the right time can do it too, but I haven't tested extending...
    3 replies | 291 view(s)
  • Eka's Avatar
    10-05-2018, 04:12 PM
    That is the absolute maximum allowable range for voltages going into the input IO pin. This is important for circuits for protecting the IO pin from voltages outside that range, like in an ESD discharge. It isn't what...
    11 replies | 228 view(s)
  • Eka's Avatar
    10-05-2018, 03:15 PM
    See post #16 in: https://forum.pjrc.com/threads/53800-Fastled-issue-on-Teensy-3-6 Also see: Thread on the perils of unaligned word access across memory bank boundary:...
    3 replies | 291 view(s)
  • Eka's Avatar
    10-05-2018, 01:27 PM
    I looked into possible timing issues in FastLED as I waited for crashes. On a Teensy 3.6 does this need to be enabled for the hardware SPI, and disabled for bit banged SPI? in fastspi.h #if...
    16 replies | 483 view(s)
  • Eka's Avatar
    09-26-2018, 09:22 PM
    Those are the ones that were added to my file when I told the IDE I wanted to use the FastLED library. Yeah, I thought it was a bit much too.
    16 replies | 483 view(s)
  • Eka's Avatar
    09-26-2018, 08:28 PM
    I took some oscilloscope pictures last night. Daytime shots had to many reflections, and the traces weren't visible for SCI1 images. SCI0 was on channel 1, and SCI1 on channel 2. Channel 2 doesn't get a text tag in the...
    16 replies | 483 view(s)
  • Eka's Avatar
    09-25-2018, 03:24 PM
    I'm going to chock this down to a hardware issue for SPI0. The broken pin on my driver chip was the VCC power one. That meant the incoming signal to the first APA102 wasn't very well formed. It propagated that and...
    16 replies | 483 view(s)
  • Eka's Avatar
    09-25-2018, 12:39 AM
    Using library FastLED at version 3.1.8 in folder: /home/pi/software/arduino/arduino-1.8.5/hardware/teensy/avr/libraries/FastLED Some extra variables and library calls remain, but heavily trimmed down. #include...
    16 replies | 483 view(s)
  • Eka's Avatar
    09-25-2018, 12:23 AM
    Code in this https://forum.pjrc.com/threads/53008-Lockups-with-FastLED-amp-TeensyThreads thread, but tied into issues with TeensyThreads library lockups. In my current development code I moved the show call into it's...
    16 replies | 483 view(s)
  • Eka's Avatar
    09-19-2018, 01:42 PM
    I guess I should mention that from my 12 AWG supply wires, I have 100uF electrolytic capacitors and connections at the density of every 10 LEDs over to the +5V and ground on the strips on one prototype. It didn't allow...
    16 replies | 483 view(s)
  • Eka's Avatar
    09-19-2018, 01:11 AM
    Could be that or the infamous APA102 timing issue that means longer strips have to be run at slower data rates. Just slow this down DATA_RATE_MHZ(8) until it works reliably. I have a 20 Amp medical grade DC to DC...
    16 replies | 483 view(s)
  • Eka's Avatar
    09-18-2018, 07:13 PM
    pin 14 is an alternate for SCK0 so is fine. The card that comes with the 3.6 shows it and other alternates. I have a system setup with both MOSI0 on pin 11 & SCK0 on pin 14, and MOSI1 on pin 0 & SCK1 on pin 32...
    16 replies | 483 view(s)
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About Eka

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About Eka
Biography:
Remembers resistor transistor logic.
Location:
Land between two rivers
Occupation:
Farmer, artist.

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Fastled issue on Teensy 3.6 10-12-2018 08:43 AM
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05-18-2018