Mercurial > hg > ucis.core

comparison USBLib/Descriptor/UsbDescriptor.cs @ 58:fd63c453ff65

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Improved Windows USB enumeration classes
author Ivo Smits <Ivo@UCIS.nl>
date Wed, 09 Oct 2013 20:54:15 +0200
parents 15ddb1e0e2a5
children 99ed461509fe
comparison
equal deleted inserted replaced
57:b1efeada517e 58:fd63c453ff65
31 return Encoding.Unicode.GetString(buffer, offset + 2, slen - 2); 31 return Encoding.Unicode.GetString(buffer, offset + 2, slen - 2);
32 } 32 }
33 public static String GetStringFromDevice(IUsbInterface device, byte index, short langId) { 33 public static String GetStringFromDevice(IUsbInterface device, byte index, short langId) {
34 Byte[] buff = new Byte[256]; 34 Byte[] buff = new Byte[256];
35 int len = device.GetDescriptor((Byte)UsbDescriptorType.String, index, langId, buff, 0, buff.Length); 35 int len = device.GetDescriptor((Byte)UsbDescriptorType.String, index, langId, buff, 0, buff.Length);
36 if (len == 0) return null;
36 return GetString(buff, 0, len); 37 return GetString(buff, 0, len);
37 } 38 }
38 } 39 }
39 [StructLayout(LayoutKind.Sequential, Pack = 1)] 40 [StructLayout(LayoutKind.Sequential, Pack = 1)]
40 public struct UsbDeviceDescriptor { 41 public struct UsbDeviceDescriptor {
197 public unsafe static UsbHubDescriptor FromByteArray(Byte[] buffer, int offset, int length) { 198 public unsafe static UsbHubDescriptor FromByteArray(Byte[] buffer, int offset, int length) {
198 if (length < Marshal.SizeOf(typeof(UsbHubDescriptor))) throw new ArgumentOutOfRangeException("length", "The data length is smaller than the descriptor length"); 199 if (length < Marshal.SizeOf(typeof(UsbHubDescriptor))) throw new ArgumentOutOfRangeException("length", "The data length is smaller than the descriptor length");
199 if (offset < 0 || length < 0 || offset + length > buffer.Length) throw new ArgumentOutOfRangeException("length", "The specified offset and length exceed the buffer dimensions"); 200 if (offset < 0 || length < 0 || offset + length > buffer.Length) throw new ArgumentOutOfRangeException("length", "The specified offset and length exceed the buffer dimensions");
200 fixed (Byte* ptr = buffer) return *(UsbHubDescriptor*)(ptr + offset); 201 fixed (Byte* ptr = buffer) return *(UsbHubDescriptor*)(ptr + offset);
201 } 202 }
203 public static unsafe int Size { get { return sizeof(UsbHubDescriptor); } }
202 } 204 }
203 } 205 }