Analog GPIO through Braswell

Can I access any of the Analog Pins via the file system?

It looks GPIO 499 matches up with A3 on the Arduino, but can I read it via:

echo 499 > /sys/class/gpio/export
echo in > /sys/class/gpio/gpio499/direction
cat < /sys/class/gpio/gpio499/value

Thanks,

Frank

 

Why do you think GPIO 499 matches up with A3 on the Arduino?

Normally it should not be possible to read the pin of another CPU unless it is meant to be (for example Pin 9 that is used to switch on/off Braswell from Arduino).

 

On my Arduino uno, A3 would be in the location of CN 14 - according to this picture. If it's not where are the analog pins and can I access them through the filesystem?

https://www.udoo.org/docs-x86/img/x86_pinout_braswell.png

 

Those OUTER pins are not Arduino pins, but for main CPU.

INNER pins are for Arduino: https://www.udoo.org/docs-x86/img/x86_pinout_arduino.png

 

Those are the pins for the PC part of the Udoo X86 (the outer pins of the headers)

The Arduino pins are on the inside: https://www.udoo.org/docs-x86/img/x86_pinout_arduino.png

You cannot read them directly from the file system. You have to send the values (as with an Arduino Uno) to the PC side through the USB bus.

You have to see the Udoo X86 as an PC with a seperate Arduino on the same board. the connection is a USB bus. See the section USB devices of this page: https://www.udoo.org/docs-x86/Arduino_101_(Intel_Curie)/Getting_Started_with_Arduino_101.html

 

OK, but do I have access to reading any analog pins from the file system (like I can on a Beaglebone Black) and if so which pins are available?

 

It seems that answer is NO - I havn't seen any mention of analog pins for main CPU, only for Arduino side.

 

Well, that's disappointing. Thanks for all of your help, though!