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adafruit / Adafruit_nRF52_Arduino

Adafruit code for the Nordic nRF52 BLE SoC on Arduino
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FastLED port #109

Closed hathach closed 5 years ago

hathach commented 6 years ago

https://forums.adafruit.com/viewtopic.php?f=57&t=124748

https://github.com/FastLED/FastLED/issues/476

pcaddict commented 5 years ago

I have made a little progress on this here. So far I have SPI based chipsets in a functional state (tested APA102 only). I have yet to pay any attention to the clockless chipsets.

Video of my feather running FastLed here.

hathach commented 5 years ago

@pcaddict superb ! thank you very much, I have never used FastLED before, this is very helpful

henrygab commented 5 years ago

I'm working on a port now. I did use pcaddict's branch, also with APA102. However, it's not quite as stable as it should be. Esp. needs the ability to set H0H1 for high-speed SPI, and support for boards where the Arduino pin numbers don't match the board pin numbers....

Track progress at https://github.com/FastLED/FastLED/issues/747

hathach commented 5 years ago

Thanks @henrygab , please keep us update and submit PR if it is ready.

henrygab commented 5 years ago

Update: FYI, there are three parts to getting FastLED support.

  1. FastPIN -- allows toggling individual pins very rapidly. FastPIN is sufficient to control APA102 (dotstar) or other SPI LEDs using using software SPI.
  2. FastSPI -- Enables hardware-assisted SPI, improving performance.
  3. Clockless -- Enables neopixel and other implied-clock chips.

A PR for Part 1 (FastPin) is now submitted for FastLED's maintainer (focalintent) to code review / consider. See https://github.com/FastLED/FastLED/pull/774.

I am moving on to Part 2 (FastSPI), which I already have in mind how to get working.

I am unlikely to complete Part 3 (clockless), but FastLED's maintainer (focalintent) may try to get and validate that one.

hathach commented 5 years ago

superb !!!

henrygab commented 5 years ago

An updated PR for Parts 1 and 2 (FastPin and FastSPI) has now been submitted for FastLED's maintainer (focalintent) to code review / consider. See https://github.com/FastLED/FastLED/pull/779.

Good enough for SPI-based LEDs

This works for APA102 (DotStar), as an example.

Missing for full support

All that is needed is clockless. Unfortunately, that's beyond my abilities at the moment. If you have the ability, see the comment I added to the above PR, for initial notes on the information I already discovered that may be useful.

henrygab commented 5 years ago

For those reaching this item, wondering how to use the nRF52 library with SPI chipsets, even before it's integrated into the official FastLED libraries, here's one method, based generally on https://www.arduino.cc/en/Guide/Libraries#toc5, but using git instead of downloading a ZIP file.

Find your sketchbook location

  1. Start Arduino IDE
  2. Menu Option File->Preferences
  3. Note the directory listed as you Sketchbook location This example will use a sketchbook location of C:\Users\ExampleUser\Documents\Arduino … replace with your path when you see this path below.

Open a command-line and go to the libraries folder

For Windows:

  1. Click Start->Run, type cmd.exe, and press enter
  2. type cd /d c:\Users\ExampleUser\Documents\Arduino to go to sketchbook folder (replace with your sketchbook path from above)
  3. type cd /d Libraries to enter the libraries folder
  4. keep this window open for next steps...

Remove any prior version of FastLED

For Windows, using GUI:

  1. type start . … a file explorer window should open showing the libraries folder
  2. If the folder 'FastLED' exists, delete it (and all files inside)
  3. Close the file exporer window (keep the cmd.exe window)

Use GIT to download the nRF52/SPI enabled FastLED libraries

In the cmd.exe window....

  1. type git clone https://github.com/henrygab/fastled.git and press enter
  2. type git checkout nrfx and press enter (this will obtain the branch with nrf52 support)

That's all it takes.

henrygab commented 5 years ago

PR for a first version with support for clockless: https://github.com/FastLED/FastLED/pull/779

Only update to the above instructions, is to change the branch name from nrfx to nrf52. For example, replace line: git checkout nrfx with git checkout nrf52

Works as-is up with strings of clockless LEDs up to 144 LEDs long. Simply modify the line (currently at clockless_arm_nrf52.h line 10 #define FASTLED_NRF52_MAXIMUM_PIXELS_PER_STRING 144

Allocations are done at compile-time, so you'll know if you have enough RAM when you compile.

henrygab commented 5 years ago

PR https://github.com/FastLED/FastLED/pull/802 was accepted a few hours ago. Soon afterwards, FastLED revision was updated to version 3.0002.0007, including explicitly listing support for the nordicnrf52.

@hathach I believe this issue can now be resolved. :tada:

hathach commented 5 years ago

Superb!!! Thanks @henrygab, though I have no idea how to use this yet (wil try later). But it is great addition. @ladyada do you happen to know FastLED and/or used it previously on samd 😊😊

ladyada commented 5 years ago

it definitely works on SAMD because we added support for our boards a while ago. you can use it with any WS2812-compatible LEDs to test

hathach commented 5 years ago

thanks @henrygab again for the excellent works :)