telno

Good point.  I just found this via Google, and when the code fix worked successfully I knew it was still relevant to the official source.

 

 

Would love to hear from someone about a fix for this issue.

I got this working after looking at the Netduino source for: NetduinoGoFirmware / Framework / Core / Native_IO / FileSystemManager.cs

 

The problem seems to be this section:

 

if ((share != FileShareReadWrite) ||((current.Share & access) != access)){throw new IOException("", (int)IOException.IOExceptionErrorCode.UnauthorizedAccess);}

 

First of all, this code means that [color=#ff0000;]only ReadWrite shared access is supported[/color].  This isn't documented anywhere I could find.

 

Second, the code creates a dependency on those enumeration values being the same (and never changing).  Bad, coupling.

 

 

To work around the issue, update the file access and share permissions to ReadWrite:

 

string fileName = @"SDtest.log";var writeStream = File.Open(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite);var readStream = File.Open(fileName, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);

I'm experiencing the same problem. I get an IO exception on the second FileStream.  In my case, the first stream is a writer (log writer), and the second is a reader (log reader).

 

 

 

 

string fileName = @"SDtest.log";var writeStream = File.Open(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.Read);// this line will fail with IOException (ErrorCode=UnauthorizedAccess)var readStream = File.Open(fileName, FileMode.Open, FileAccess.Read, FileShare.Read); 

 

Same problem here. DHCP is successfully grabbing an IP but it's showing as MAC 00:04:A3:00:00:00 on my router instead of the actual MAC on the sticker (5C:86:*).

I just ran into the same roadblock when trying to follow the wiki to upload TinyBooterDecompressor. I just updated that wiki to point to the forum .zip file download. Even better, please post the latest firmwares on the downloads page so all downloads are available there so we don't have to find some of them embedded in the forums Thanks!