Give rpi some time to link digital pin property#53
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wujiang wants to merge 1 commit intokidoman:masterfrom
Open
Give rpi some time to link digital pin property#53wujiang wants to merge 1 commit intokidoman:masterfrom
wujiang wants to merge 1 commit intokidoman:masterfrom
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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
Contributor
|
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. |
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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