COM Ports I/O Exception

bgontek · Mar 2nd 2014

I have a Problem with the COM Ports, perhaps it is my mistake, but in every case (COM1,2,3) i got an I/O Exception Error, when i want to open the COM Port. The code is working fine on my x64 System and I think everything is right.
I am working on armstonea5 with wec2013 and i read that i had to remove ndcucfg on Startup and deactivated Serial Debugging (ndcucfg --> Serial debug off, ),which i have done, but i have the same Problem on every com port.

Thank you very much !

//Action

Code

Dim comport As New COMPortA
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
comport.SerialPort1_DataWrite()
End Sub

//Class COMPortA

Code

Imports System.IO.Ports
Public Class COMPortA
Dim SerialPort1 As SerialPort
Private SerialDataReceivedEventHandler1 As New SerialDataReceivedEventHandler(AddressOf SerialPort1_DataReceived)
Public Sub New()
SerialPort1 = New SerialPort
openComPort()
End Sub
Private Sub openComPort()
Try
If SerialPort1.IsOpen = False Then
With SerialPort1
.PortName = "COM1"
.BaudRate = CInt("38400")
.Parity = IO.Ports.Parity.None
.DataBits = 7
.StopBits = IO.Ports.StopBits.Two
.Handshake = IO.Ports.Handshake.None
.RtsEnable = False
.DtrEnable = False
.ReadTimeout = 2000
End With
SerialPort1.Open()
AddHandler SerialPort1.DataReceived, SerialDataReceivedEventHandler1
End If
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
End Sub
Public Sub SerialPort1_DataWrite()
Try
SerialPort1.Write(New Byte(5) {81, 0, 49, 241, 0, 140}, 0, 6)
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
End Sub
Private Sub SerialPort1_DataReceived(ByVal sender As Object, ByVal e As SerialDataReceivedEventArgs)
Dim Bytenumber As Integer
Dim readBuffer(5) As Byte
Bytenumber = SerialPort1.BytesToRead
SerialPort1.Read(readBuffer, 0, Bytenumber)
For Each item In readBuffer
MessageBox.Show(item.ToString)
Next
End Sub
End Class

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Edit by F&S: Fix indendation by using "code" tags.

bgontek · Mar 4th 2014

Is it not possible to connect with .net 3.9 to Serial port?

bgontek · Mar 5th 2014

???????????????

bgontek · Mar 6th 2014

When I try it with dll Import, I have the same Problem:

Code

Imports System.Runtime.InteropServices
Public Class COMPortB
Private Const GENERIC_READ As UInt32 = 2147483648
Private Const GENERIC_WRITE As UInt32 = 1073741824
Private Const OPEN_EXISTING As UInt32 = 3
Private hPort As IntPtr
Public Sub New()
OpenCOMPort("COM2")
End Sub
Public Function OpenCOMPort(Port As String) As Boolean
hPort = CreateFile(Port, GENERIC_READ Or GENERIC_WRITE, 0, IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero)
Dim i As IntPtr = CType(-1, IntPtr)
If hPort = i Then
Return False
End If
Return True
End Function
Public Sub Close()
CloseHandle(hPort)
End Sub
<DllImport("coredll.dll", EntryPoint:="CreateFileW", SetLastError:=True)> _
Public Shared Function CreateFile(lpFileName As String, dwDesiredAccess As UInteger, dwShareMode As UInteger, pSecurityAttributes As IntPtr, dwCreationDisposition As UInteger, dwFlagsAndAttributes As UInteger, hTemplateFile As IntPtr) As IntPtr
End Function
<DllImport("coredll.dll", EntryPoint:="CloseHandle", SetLastError:=True)> _
Public Shared Function CloseHandle(hObject As IntPtr) As Integer
End Function
<DllImport("coredll.dll", EntryPoint:="ReadFile", SetLastError:=True)> _
Public Shared Function ReadFile(hObject As IntPtr, lpBuffer As [Byte](), NumberOfBytesToRead As UInteger, NumberOfBytes As Int32(), lpOverLapped As IntPtr) As UInteger
End Function
<DllImport("coredll.dll", EntryPoint:="WriteFile", SetLastError:=True)> _
Public Shared Function WriteFile(hObject As IntPtr, lpBuffer As [Byte](), NumberOfBytesToWrite As UInteger, NumberOfBytes As Int32(), lpOverLapped As IntPtr) As UInteger
End Function
End Class

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i just got back a False when i try to open the COM Port

fs-support_ZU · Mar 10th 2014

Hello,

i think we have more then one problem. At frist the "COM" seems to work else "ndcucfg" would not work!

First problem may be that your communication settings are not supported at the time (refer http://www.forum.fs-net.de/viewtopic.php?f=65&t=3542). The new drivers is not released yet, so try "8,N,1" for your tests. We will relase new driver in KW12 (also for 7,N,2).

Second problem may be that serial debug output and/or ndcucfg is still active:
- disable ndcucfg -> delete in HKLM\Init the "Launch" for ndcucfg
- disable serial debug Output -> step into the boot loader, enter "O" enter "Y".

I can't imagine that the problem refers to CF3.9!

bgontek · Mar 10th 2014

First Probleme:
For the first time 8,N,1 is enough for us, cause it should be just a test with a RS485 Sensor to test a RS485 converter. So it is not so Important first time, but i have the same error with 8,N,1 and .net.

Second Probleme:
It is not possible to enter the bootloader with s or shift S (I press or hold S or s on Startup) but nothing happend (USB Keyboard on armstone). i read the documentation first step armstone a5 and armstone a8 but it is not working. When i open DCUTerm (com config: 8,N,1) for Serial Debugging i just see something like that:

[i]7><-4>8<-114><-32><0><-128><-32><-16><-4><-114><-32><0><-128><-32><0><-16><-32><0><-2><-32>~<-8><-32><0><-128><-32>~<-8><0><-114><-32><0><-128><-32><0><-16><-32><0><-2><0><-32>p<-64><0>p8<-4><-32><-16><-4><-114><0><-32><-32><-114><-32><0><-128><-32><0><-16><-32><0><-2><0>~8<0><-4><-32><0><-16><-32><0><-16><-32><0><-16><-32><0><-16><-32><0><-16><-32><0><-16><-32><-114><0><-32><-64><-4>p<-57><-32><-2><-4>8<-4><-114><-32><-32><-8><-4><-114><0><-1>p<-8><-4><-16><0><-32>~<-57><-32><-114><-32><0><-128><-32><-114><-32><0><-32>~<7><0><0><-57><0><-32>~<7><-4><-32><0><-128><-32><0><-16><-32><0><-2><0>~8<0><-4><-32><0><-16><-32><-2><-4>p<0><-i]

Note:
- when i disable ndcucfg --> Serial debug off i have no dcu term Output, so it seems to work
- ndcucfg is removed from startup

fs-support_ZU · Mar 11th 2014

Hello,

Quote

For the first time 8,N,1 is enough for us, ...

For sure we reworked the driver. Since V1.8 also "7,N,2" is working. We will include this driver in later kernel releases.

Quote

When i open DCUTerm (com config: 8,N,1) for Serial Debugging i just see something like that: ><-4>8<-...

Goto "DCUTerm->View->Options" and set "Binary Output" to "off".
What do you see now? NDCUCfg?

bgontek · Mar 11th 2014

with binary off i see (as it was before):

32><0><-4><0><-114><-32><0><0><0>p8<-4><0>p8<-32><-114><-4>p<0><-64><-32>~<-8>p<-1><0><-1>p<-1>~<7>~<7><0>8<0><-114><-16><-4><-114><0>p<-1>~<-8><-4><7><-4>~<7><-4><-32><0><-128><-32><-64><-1><-4>~<-57><-32><-114><0><-4><-4><-1><-4><-114>~<-57><0><-32><-114><0><-32><-64><-32><-32>8<-32><0><-4><0><-114><-32><0><0><0>p8<-32><0><-1>~<7><-4><0>8<0><-32><-114><-4>p<-57><0><-32>p<-1><-32><0><-128><-32><-64>p<-1><0>p8<-32><-32><0><-2><-32><-128><-4>p<0><-8><-32><0><-16><-32><0><-128><-32>p<0><-57><-128>p<-8><-4><0><-57><0><-4><0><-114><-32><-16>~<-57><0>p<-1>~<7><0><-32>~<7><-4><-4><-114>~<7><-32><-114><-32><7><0>?<-4><0><-32>~<7><-4><-4><-114>~<7>~<7><0><-114><-4><7><-32><0><-128><-32><-114><0><-57><-57><-32><7><0><-32>~<0><-57><-4><-32><-114><-4>p<-57><0><-32>p<-1><-32><-114><0><-32><-64><-4>p<-57><-4><-4>?<-4>p<-1><-57>p<-57><0><0>p8<-32><-32><-32>~<-57><-32><0><-8><-16><-4><-114>~<7>~<-57><-4><0><-57><0>

with binary on i see:

,0x1C,0x7E,0xC7,0x00,0x1C,0x70,0xFF,0x1C,0x1C,0x7E,0x07,0x00,0x1C,0xE0,0x7E,0x07,0xFC,0xFC,0x8E,0x1C,0x7E,0x07,0xE0,0x1C,0x8E,0xE0,0x0E,0x07,0x00,0x1C,0x0E,0x3F,0xFC,0x1C,0x00,0x1C,0xE0,0x7E,0x07,0xFC,0xFC,0x8E,0x1C,0x7E,0x07,0x1C,0x7E,0x07,0x00,0x1C,0x8E,0xFC,0x0E,0x07,0xE0,0x00,0x80,0xE0,0x8E,0x00,0x1C,0x0E,0xC7,0x1C,0x0E,0xC7,0x1C,0xE0,0x0E,0x07,0x1C,0x00,0xE0,0x7E,0x00,0xC7,0xFC,0xE0,0x8E,0xFC,0x70,0xC7,0x00,0xE0,0x70,0xFF,0xE0,0x8E,0x00,0xE0,0x0E,0xC0,0xFC,0x70,0xC7,0xFC,0xFC,0x0E,0x3F,0xFC,0x1C,0x70,0xFF,0x1C,0x0E,0xC7,0x1C,0x70,0xC7,0x1C,0x00,0x1C,0x00,0x70,0x38,0xE0,0xE0,0x1C,0xE0,0x7E,0xC7,0xE0,0x1C,0x00,0x1C,0x0E,0xF8,0x1C,0xF0,0xFC,0x8E,0x1C,0x7E,0x07,0x1C,0x7E,0xC7,0xFC,0x00,0x0E,0xC7,0x00,

But no Text?

fs-support_ZU · Mar 11th 2014

Hello,

DCUTerm baudrate is 38400? We have NBoot which switch to 115kBaud, but in general this NBoot should not delivered:(. Try 115kBaud and/or update your bootloaders.
By the way, do you use latest firmware?

bgontek · Mar 11th 2014

Baudrate is 115200 and Setting are 8,N,1

I will try to update the bootloaders.
I receive the board in February, so i think every Version is up to date.

fs-support_ZU · Mar 11th 2014

Try DCUTerm baudrate 38400 and setting 8,N,1, i suggest this works and you will see "NDCUCfg"!
Then disable "NDCUCfg" and try to access the port again.

bgontek · Mar 11th 2014

OK with 38400 and 8,N1 DCUTerm is working fine and it is possible to disable Serial Debugging!!!
Bootloader Version is:

Microsoft Windows CE Bootloader Common Library Version 1.1 Built Nov 26 2013 15:18:27
Microsoft Windows CE Bootloader for armStoneA5 Built Nov 29 2013
Portions copyright (c) 2012 F&S Elektronik Systeme GmbH
Boot Loader, Version 0.6
NBoot, Version VN05
HW rev. 1.10

- I disabled Serial Debugging succesfull (with O and Y)
- I removed ndcucfg from autostart (when i reboot the System, dcuterm shows nothing, so it seems to work)

But it is not possible to open the comports via .net.

Note: I have the same Problem on each comport!!!! (I wrote it in first post), but i need comport 1 cause i need a rs485 converter (rts and cts)!

bgontek · Mar 11th 2014

Sorry i found a small mistake in code !!!!!

Everything is working fine !!!

Thank you very much for good Support, but i found in docomentation that the Settings for dcuterm are 115200 and not 38400 !!!

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