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AnalogWrite error #43

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jadonk opened this issue Apr 25, 2018 · 2 comments
Open

AnalogWrite error #43

jadonk opened this issue Apr 25, 2018 · 2 comments
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@vaishnavachath
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gsoc-2018

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@jadonk
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jadonk commented Apr 25, 2018

From @el-j on December 13, 2017 16:11

i use the pocketbeagle board.

and set pin p2_1 to analogwrite

b.pinMode(pin, b.ANALOG_OUTPUT, );
b.analogWrite(pin, 1, 2000, printJSON)

sadly it ends in this error:

{"err":"error updating PWM freq and value: undefined, Error: ENOENT: no such file or directory, open 'undefined/period'"}

same error in the playground.
i really need analog write. do you have any suggestions how i can use it?

Copied from original issue: jadonk#158
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jadonk commented Apr 25, 2018

This is going to require a kernel update as I've got the other fixes in. I believe @RobertCNelson will do the kernel update soon. See jadonk#156.

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jadonk commented Apr 25, 2018

Almost there. Still have the udev issue jadonk#161.

@jadonk jadonk mentioned this issue Apr 25, 2018
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vaishnavachath referenced this issue in jadonk/bonescript Jun 8, 2018
@vaishnavachath
probable fix for PWM udev delay
f76e7a9 
#161
proposed solution:using async.js (until method) try accessing(for a maximum 10 times) until no EACCES error is thrown,
works well after 5 tries,when tested on:  Linux beaglebone 4.9.82-ti-r102,
BeagleBoard.org Debian Image 2018-03-05
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