Question

我正在尝试使aspnet核心web应用程序在我的树莓派上运行。该应用程序使用Bifrost与树莓的GPIO进行交互，但是每次执行sudo dotnet run时，它都会失败，并显示错误

Using launch settings from /home/pi/Desktop/keypad-alarm/keypad-alarm-server/Properties/launchSettings.json...     
Write value High to pin at /sys/class/gpio/gpio17/value

Unhandled Exception: System.UnauthorizedAccessException: Access to the path '/sys/class/gpio/gpio17/value' is denied. ---> System.IO.IOException: Operation not permitted    
--- End of inner exception stack trace ---    at 
System.IO.FileStream.WriteNative(ReadOnlySpan`1 source)    at 
System.IO.FileStream.FlushWriteBuffer()    at 
System.IO.FileStream.FlushInternalBuffer()    at 
System.IO.FileStream.Flush(Boolean flushToDisk)    at 
System.IO.FileStream.Flush()    at 
System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder)    at 
System.IO.StreamWriter.Dispose(Boolean disposing)  at 
System.IO.TextWriter.Dispose()   
 at System.IO.File.WriteAllText(String path, String contents)    at 
Bifrost.Devices.Gpio.GpioPin.Write(GpioPinValue pinValue)    at 
keypad_alarm_server.TweetController.Tweet(Int32 milliseconds) in 
/home/pi/Desktop/keypad-alarm/keypad-alarm-server/TweetController.cs:line 25    at 
keypad_alarm_server.Program.Main(String[] args) in /home/pi/Desktop/keypad-alarm/keypad-alarm-server/Program.cs:line 15

我应该提到的是，我什至在Program.cs中启动Web服务器之前，都会立即将GPIO 17设为高电平以发出蜂鸣声。

我如何确保dotnet具有访问gpio的足够权限？

Answer 1

好吧，像往常一样，花了很多时间在发布问题之后，您会在某个地方找到答案...

未经授权的异常非常令人误解，因为缺少的是c＃中的以下语句：setText

pin.SetDriveMode(GpioPinDriveMode.Output);

dotnet core webapp没有gpio访问

1 个答案: