Give rpi some time to link digital pin property #53
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
It looks like Raspberry pi needs some time to get a digital pin
link properly after it is being exported.
Sample code to run:
```go
package main
import (
"fmt"
"github.com/kidoman/embd"
_ "github.com/kidoman/embd/host/rpi"
)
func main() {
defer embd.CloseGPIO()
fmt.Println(embd.SetDirection(10, embd.Out))
}
```
- before the change, the output is:
`open /sys/class/gpio/gpio10/direction: permission denied`
- after the change, the output is `<nil>`
Close kidoman#52
This was referenced Jun 22, 2016
Open
|
IMHO the proper fix would not add a blind delay but use a shorter delay and check the permissions, and then loop until these change. Overall this sucks. Maybe we should add an explicit call to export a list of GPIO pins, this way they could all be exported and then it could wait for the permissions to all get fixed. |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
It looks like Raspberry pi needs some time to get a digital pin link properly after it is being exported.
Sample code to run:
open /sys/class/gpio/gpio10/direction: permission denied<nil>Close #52