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by ozcar
Tue May 05, 2020 10:59 pm
Forum: Projects
Topic: [F4] Neopixel driver using hardware timers
Replies: 50
Views: 31222

Re: [F4] Neopixel driver using hardware timers

... i'm not too sure if between each 1 or 0 code (symbol) if we'd need to insert that 'frame unit' if that is a code separator? There is no need for any separation between the bits, but there is a need to have a gap (absence of any pulses) when data for all the LEDs has been transmitted. That end-o...
by ozcar
Tue May 05, 2020 12:04 pm
Forum: Projects
Topic: [F4] Neopixel driver using hardware timers
Replies: 50
Views: 31222

Re: [F4] Neopixel driver using hardware timers

... You can see that a 1 and a 0 have different high times but the same low times making for a different total time total times for a 1 and a 0. There are other LEDs around like too. Yes, they give the same range for the zero and one low times, but they cover a wide enough range that there is no ne...
by ozcar
Tue May 05, 2020 4:01 am
Forum: Projects
Topic: [F4] Neopixel driver using hardware timers
Replies: 50
Views: 31222

Re: [F4] Neopixel driver using hardware timers

... OK I never looked at the OC1PE bit. The code (and idea) came from my code I wrote for generating the acceleration puleses to drive stepper motors in which I never changed the CCR1 value (duty width) I just changed the ARR value. I am driving my LED strip with this code so it seems to be working...
by ozcar
Thu Apr 30, 2020 10:40 am
Forum: Projects
Topic: [F4] Neopixel driver using hardware timers
Replies: 50
Views: 31222

Re: [F4] Neopixel driver using hardware timers

I specifically bought a Beaglebone Black to drive pixel LED strips, because I thought that was an ideal task for one of the PRU processors. However, in the end I found that for the number of LEDs I was working with (up to 300) it was possible to use a lowly Arduino nano, so the BBB sits in a box. .....
by ozcar
Thu Apr 30, 2020 10:21 am
Forum: Let us know a bit about you and your projects
Topic: A long time lurker
Replies: 3
Views: 3134

Re: A long time lurker

Just4Fun wrote: Thu Apr 30, 2020 7:38 am ...
Some examples: V20-MBC, Z80-MBC2, RC-Z8BASIC
The last of those reminds me of this:
v6809.jpg
v6809.jpg (52.82 KiB) Viewed 3100 times
But that is software only - or at least not hardware that I had to build.
by ozcar
Wed Apr 29, 2020 9:18 pm
Forum: Let us know a bit about you and your projects
Topic: A long time lurker
Replies: 3
Views: 3134

A long time lurker

About me: The main thing you should know is that I am a cheapskate. Started out building electronic projects around 55 (!) years ago, often using transistors and whatever scrounged from old computer boards. Safe to say I'm "master of none", but I have tinkered with all sorts of things. Ele...

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