Ubuntu GPIO Export Fails. What am I missing?
I am working with utilizing some GPIO pins on an SBC (Parallella).
As a first test, I decided to manually configure some GPIO pins.
For example:
echo 54>/sys/class/gpio/export
My understanding is that this should create a directory /sys/class/gpio/gpio54, where the direction, value, etc. for the pin can be set.
I get no error messages, followed by a prompt. When I ls afterward, I can see that the gpio54 directory hasn't been created. I searched using the find command and it doesn't seem to have been created anywhere else.
I have done all of this with root privilege. Re-flashing my SD card with a fresh copy of Ubuntu doesn't seem to help.
What am I missing?
16.04
asked 22 hours ago
EvanEvan
11
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I am working with utilizing some GPIO pins on an SBC (Parallella).
As a first test, I decided to manually configure some GPIO pins.
For example:
echo 54>/sys/class/gpio/export
My understanding is that this should create a directory /sys/class/gpio/gpio54, where the direction, value, etc. for the pin can be set.
I get no error messages, followed by a prompt. When I ls afterward, I can see that the gpio54 directory hasn't been created. I searched using the find command and it doesn't seem to have been created anywhere else.
I have done all of this with root privilege. Re-flashing my SD card with a fresh copy of Ubuntu doesn't seem to help.
What am I missing?
16.04
asked 22 hours ago
EvanEvan
11
New contributor
Evan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I am working with utilizing some GPIO pins on an SBC (Parallella).
As a first test, I decided to manually configure some GPIO pins.
For example:
echo 54>/sys/class/gpio/export
My understanding is that this should create a directory /sys/class/gpio/gpio54, where the direction, value, etc. for the pin can be set.
I get no error messages, followed by a prompt. When I ls afterward, I can see that the gpio54 directory hasn't been created. I searched using the find command and it doesn't seem to have been created anywhere else.
I have done all of this with root privilege. Re-flashing my SD card with a fresh copy of Ubuntu doesn't seem to help.
What am I missing?
16.04
asked 22 hours ago
EvanEvan
11
New contributor
Evan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I am working with utilizing some GPIO pins on an SBC (Parallella).
As a first test, I decided to manually configure some GPIO pins.
For example:
echo 54>/sys/class/gpio/export
My understanding is that this should create a directory /sys/class/gpio/gpio54, where the direction, value, etc. for the pin can be set.
I get no error messages, followed by a prompt. When I ls afterward, I can see that the gpio54 directory hasn't been created. I searched using the find command and it doesn't seem to have been created anywhere else.
I have done all of this with root privilege. Re-flashing my SD card with a fresh copy of Ubuntu doesn't seem to help.
What am I missing?
16.04
16.04
asked 22 hours ago
EvanEvan
11
New contributor
Evan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 22 hours ago
EvanEvan
11
New contributor
Evan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 21 hours ago
Evan
asked 22 hours ago
EvanEvan
11
New contributor
Evan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 22 hours ago
EvanEvan
11
asked 22 hours ago
EvanEvan
11
11
New contributor
Evan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Evan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Evan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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