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by yvesbazin
Tue Feb 13, 2018 1:36 pm
Forum: General Discussion
Topic: Problem with parallel GPIO pins and NeoPixels
Replies: 8
Views: 3834

Re: Problem with parallel GPIO pins and NeoPixels

Hello
Could you please an example on how you use portENTER/EXIT_CRITICAL(&spinlock)
I have some issues with the first led of each strip when the wifi is on.
thank you

some example of what I do
https://www.youtube.com/watch?v=4JQ5rrqL-L8
https://www.youtube.com/watch?v=PaJcA815olE
by yvesbazin
Tue Feb 13, 2018 1:01 pm
Forum: General Discussion
Topic: SPI Maximum speed
Replies: 12
Views: 13714

SPI Maximum speed

Dear all
I want to drive shift registers using SPI as fast as possible.
Using the native SPI pin I should be able to push data at 80Mhz
But it seems like I can't go faster than 5Mhz ?
Also changing duty_cycles doesn't have any effect.
Can someone help me
thank you

Regards
Yves

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