nefarius/Nefarius.Peripherals.SerialPort
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This commit is contained in:
Benjamin Höglinger-Stelzer 2024-07-13 15:07:34 +02:00
parent c171f2a316
commit 3394e70767
3 changed files with 11 additions and 12 deletions
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3
Nefarius.Peripherals.SerialPort/NativeMethods.txt
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@ -15,4 +15,5 @@ GetCommModemStatus
GetOverlappedResult GetOverlappedResult
ClearCommError ClearCommError
GetCommProperties GetCommProperties
WIN32_ERROR WIN32_ERROR
GetHandleInformation

1
Nefarius.Peripherals.SerialPort/Nefarius.Peripherals.SerialPort.csproj
View File

@ -35,5 +35,6 @@
<PrivateAssets>all</PrivateAssets> <PrivateAssets>all</PrivateAssets>
</PackageReference> </PackageReference>
<PackageReference Include="Microsoft.Windows.SDK.Win32Metadata" Version="61.0.15-preview" /> <PackageReference Include="Microsoft.Windows.SDK.Win32Metadata" Version="61.0.15-preview" />
<PackageReference Include="System.Memory" Version="4.5.5" />
</ItemGroup> </ItemGroup>
</Project> </Project>

19
Nefarius.Peripherals.SerialPort/SerialPort.cs
View File

@ -257,11 +257,10 @@ public partial class SerialPort : IDisposable
CheckResult(); CheckResult();
_writeCount = toSend.GetLength(0); _writeCount = toSend.GetLength(0);
fixed (byte* ptr = toSend)
fixed (NativeOverlapped* ptrOl = &_ptrUwo) fixed (NativeOverlapped* ptrOl = &_ptrUwo)
{ {
uint sent; uint sent;
if (PInvoke.WriteFile(_hPort, ptr, (uint)_writeCount, &sent, ptrOl)) if (PInvoke.WriteFile(_hPort, toSend.AsSpan(), &sent, ptrOl))
{ {
_writeCount -= (int)sent; _writeCount -= (int)sent;
} }
@ -460,17 +459,16 @@ public partial class SerialPort : IDisposable
private unsafe void ReceiveThread() private unsafe void ReceiveThread()
{ {
byte* buf = stackalloc byte[1]; byte[] buffer = new byte[1];
AutoResetEvent sg = new(false); AutoResetEvent sg = new(false);
NativeOverlapped ov = new() { EventHandle = sg.SafeWaitHandle.DangerousGetHandle() }; NativeOverlapped ov = new() { EventHandle = sg.SafeWaitHandle.DangerousGetHandle() };
COMM_EVENT_MASK eventMask = 0;
try try
{ {
while (true) while (true)
{ {
COMM_EVENT_MASK eventMask = 0;
if (!PInvoke.SetCommMask(_hPort, if (!PInvoke.SetCommMask(_hPort,
COMM_EVENT_MASK.EV_RXCHAR | COMM_EVENT_MASK.EV_TXEMPTY | COMM_EVENT_MASK.EV_CTS | COMM_EVENT_MASK.EV_RXCHAR | COMM_EVENT_MASK.EV_TXEMPTY | COMM_EVENT_MASK.EV_CTS |
COMM_EVENT_MASK.EV_DSR COMM_EVENT_MASK.EV_DSR
@ -540,7 +538,7 @@ public partial class SerialPort : IDisposable
uint gotBytes; uint gotBytes;
do do
{ {
if (!PInvoke.ReadFile(_hPort, buf, 1, &gotBytes, &ov)) if (!PInvoke.ReadFile(_hPort, buffer, &gotBytes, &ov))
{ {
if (Marshal.GetLastWin32Error() == (int)WIN32_ERROR.ERROR_IO_PENDING) if (Marshal.GetLastWin32Error() == (int)WIN32_ERROR.ERROR_IO_PENDING)
{ {
@ -555,7 +553,7 @@ public partial class SerialPort : IDisposable
if (gotBytes == 1) if (gotBytes == 1)
{ {
OnRxChar(buf[0]); OnRxChar(buffer[0]);
} }
} while (gotBytes > 0); } while (gotBytes > 0);
} }
@ -593,8 +591,7 @@ public partial class SerialPort : IDisposable
if (i != 0) if (i != 0)
{ {
uint f; if (!Win32Com.GetCommModemStatus(_hPort.DangerousGetHandle(), out uint f))
if (!Win32Com.GetCommModemStatus(_hPort.DangerousGetHandle(), out f))
{ {
throw new CommPortException("IO Error [005]"); throw new CommPortException("IO Error [005]");
} }
@ -643,4 +640,4 @@ public partial class SerialPort : IDisposable
ThrowException("Offline"); ThrowException("Offline");
return false; return false;
} }
} }