Read I/O Pin in C# fails

thomas-g. · Jan 12th 2010

Hello,

i have got a problem reading an I/O - Pin of my PicoMOD6 in a C# application under Win CE6.0.

i use CreateFile() and ReadFile() which are used via DllImport, but when I do CreateFile i get a "-1" as result.
Here is some code:

Code

const UInt32 GENERIC_READ = 0x80000000;
const UInt32 GENERIC_WRITE = 0x40000000;
const UInt32 OPEN_EXISTING = 3;
IntPtr hPort_come = CreateFile("DIO1:", GENERIC_READ | GENERIC_WRITE, 0, IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero);
Byte[] Data = new Byte[1];
Int32[] Read = new Int32[1];
uint come_sig = ReadFile(hPort_come, Data, 1, Read, IntPtr.Zero);

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According to a PM to fs-support_ZU here are some additional information:
In the registry under HKLM\Drivers\Active\ there is one key with following entrys:

Hnd = 3499885408
Name = DIO1:
Key = Drivers\BuiltIn\DIGITALIO
BusParent = 3492486400
InterfaceType = 0
BusName = BuiltInPhase1_0_0_0

When i try different DIOs then DIO1 i get an invalid handle.
If I use DIO1 then i get a valid handle, but when reading the Pin there is always a "1" as result. Even when connecting pin over 10kOhm to GND.

In the registry under HKLM\Drivers\\BuiltIn\DIGITALIO
is the following:

DataInit = 16
DataDir = 16
Type = 0
UseAsKey = 0
IRQCfg0 = 0
IRQCfg1 = 0
IRQCfg2 = 0
UseAsIO = 16715775
Prefix = DIO
Dll = PM6_DIGIO.dll
Order = 151
Index = 1
Ioctl = 4
Port = 1
FriendyName = Digital I/O driver for PicoMOD6

fs-support_ZU · Jan 12th 2010

Hello,
please use following document http://www.fs-net.de/download/…D_DeviceDriver_WCE600.pdf for correct your "UseASIO" and "DataDir" registry names/values. For PicoMOD you these values are named "UseAsIOX" or "DataDirX" (X=A...D).

Note also - if "your pin" is not on "Ã¢â‚¬Â¢Port = 1" you need a "SetFilePointer" before "ReadFile"!

Here you will find a C# DIO sample class http://www.fs-net.de/phpBB2/viewtopic.php?f=4&t=2377.

thomas-g. · Jan 13th 2010

Thanks for the Documentation it helped to configure it correct but it doesn't work.

I want to poll the Port every 500ms so i use a Timer and the time it elapsed i read the Pin.

This is my complete code:

Code

using System;
using System.Linq;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.IO;
using System.IO.Ports;
namespace CE_Port_Read
{
public partial class Main : Form
{
[DllImport("coredll.dll", EntryPoint = "CreateFileW", SetLastError = true)]
public extern static IntPtr CreateFile(string lpFileName, uint dwDesiredAccess, uint dwShareMode, IntPtr pSecurityAttributes,
uint dwCreationDisposition, uint dwFlagsAndAttributes, IntPtr hTemplateFile);
[DllImport("coredll.dll", EntryPoint = "CloseHandle", SetLastError = true)]
public extern static int CloseHandle(IntPtr hObject);
[DllImport("coredll.dll", EntryPoint = "ReadFile", SetLastError = true)]
public extern static uint ReadFile(IntPtr hObject, Byte[] lpBuffer, uint NumberOfBytesToRead, Int32[] NumberOfBytes,
IntPtr lpOverLapped);
Timer come_go = new Timer();
IntPtr hPort_come;
IntPtr hPort_go;
const UInt32 GENERIC_READ = 0x80000000;
const UInt32 GENERIC_WRITE = 0x40000000;
const UInt32 OPEN_EXISTING = 3;
public Main()
{
InitializeComponent();
come_go.Tick += new EventHandler(come_go_Tick);
come_go.Interval = 100;
hPort_come = CreateFile("DIO1:", (GENERIC_READ | GENERIC_WRITE), 0, IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero);
if (hPort_come != (IntPtr)(-1)) come_go.Enabled = true;
}
void come_go_Tick(object sender, EventArgs e)
{
come_go.Enabled = false;
Byte[] Data = new Byte[1];
Int32[] Read = new Int32[1];
uint come_sig = ReadFile(hPort_come, Data, 1, Read, IntPtr.Zero);
textBox1.Text += " " + come_sig;
come_go.Interval = 500;
come_go.Enabled = true;
}
}
}

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I want to use GPIO5 on Pin29 on Port1 and at connector J5 at Pin9.
I still get "1" when i use ReadFile() no matter if i connect GND, +3V3 or +5V of the J5 connector over 10kOhm to Pin 9.

The registry is the following:

UseAsIOA DWORD 0x00000200
DataDirA DWORD 0x00000000
DataInitA DWORD 0x00000000
IRQCfg0A DWORD 0x00000000
IRQCfg1A DWORD 0x00000000
IRQCfg2A DWORD 0x00000000

fs-support_ZU · Jan 13th 2010

Hello,
everything seem to be right!

Whats the return value of "ReadFile()"?
Whats the value of "Data"?
And is "Read"=1?

Please check also value of "GetLastError()".

thomas-g. · Jan 13th 2010

return from ReadFile() is 1
Data[0] is 0
Read[0] is 1

i will check GetLastError() in a minute and edit post
edit: value from GetLastError() is 87
edit2:to be more precisely:
Int32 error = Marshal.GetLastWin32Error(); --> error 87 sometimes 6
with DllImport of coredll.dll and then GetLastError()
Int32 error = GetLastError(); --> error 5

fs-support_ZU · Jan 13th 2010

Hello,

Quote

still get "1" when i use ReadFile() no matter if i connect GND, +3V3 or +5V of the J5 connector over 10kOhm to Pin 9

You said you still get "1". But above you said "Data"=0? "Data" contains the IO-value of Port1!
Please refer http://msdn.microsoft.com/en-us/library/aa365467(VS.85).aspx.

thomas-g. · Jan 13th 2010

yes at first i had a misunderstanding of ReadFile() und took the result of that as the value read from Port and that was always 1 which is not bad at all
but Data was always 0
sry for that mistake of me that was surely a little bit confusing

thomas-g. · Jan 13th 2010

another, maybe important, information:
we had to install a new ebootloader and kernel because we did the reset to factory settings.
so we installed a new ebootloader, repartitioned the Flash and installed a new kernel.
and we had to take a kernel from the BETA folder of the "kernel" folder on CD.

"XIPNK6_CORE_091211.bin" didn't want to install properly

so we took

"NK6_MP_091201.bin" and everything worked. Could that be a problem?

thomas-g. · Jan 14th 2010

any ideas?

i tried to write on that port and pin and it worked without any problems using WriteFile() within a timer and toggled that pin... for that i changed the registry settings of course... then i change UseDataDirA back to 0x0 and tried to read and always "0" even with only 1kOhm from +3V3 to PIN9

i measured the voltage at that Pin and there were 3,311V so it is a logical 1

i have no idea were to look at or what to change to get it to work

fs-support_ZU · Jan 14th 2010

Hello,

we will check this behaviour and answer in this forum asp.

fs-support_ZU · Jan 19th 2010

Hello,
you are right "ReadFlie" does not work correct. We will rework the driver. The corrected version will be available with kernel release V0.03.

fs-support_MK · Jan 21st 2010

We have fixed the problem in the new DIO driver (version: V2.0). This driver will be included in the next kernel release.

SML · Mar 23rd 2011

Hello,

i've got the same problem with PicoMOD6 but using C++.
I use already the same settings as described above.
But i get never data after ReadFile.

I use Kernel V1.04 (6. Sept. 2010)

Here the functions:

Code

void CPortTestDlg::InitIOPort(void)
{
// if already initialized return immediately
if( m_hDigitalIO )
return;
m_hDigitalIO = CreateFile( L"DIO1:",
// GENERIC_READ,
// GENERIC_WRITE,
GENERIC_READ|GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL
);
if( m_hDigitalIO == INVALID_HANDLE_VALUE )
{
DWORD dwLastError = GetLastError();
TRACE( L"[CSLK2DlgWnd::InitIOPort] DIO1: can't init i/o port, error (%d)\r\n", dwLastError );
return;
}
// in Registry muss Bit 13 gesetzt sein (0-7 = Port0; 8-15 = Port1; ...)
// UseAsIOA = 0x02000 aktiviert den Pin13 von Port1
// UseAsIOA = 0x06000 aktiviert den Pin13 und Pin14 von Port1
// DataDirA = 0x01000 setzt den Pin13 von Port1 auf Output-Benutzung, alle anderen sind Input
// set to port 1
LONG lPort = 1;
// LONG lPort = 2;
SetFilePointer( m_hDigitalIO,
lPort,
NULL,
FILE_BEGIN
);
((CWnd*)GetDlgItem(IDC_EDIT2))->SetWindowTextW( L"Initialized" );
((CButton*)GetDlgItem(IDC_BUTTON1))->EnableWindow( TRUE );
((CButton*)GetDlgItem(IDC_BUTTON3))->EnableWindow( TRUE );
}
BOOL CPortTestDlg::ReadPortPin(INT _nPin)
{
BOOL bRet = FALSE;
unsigned char data = 0x0;
DWORD dwBytesToRead = 1;
DWORD dwMask = 0x040; // 0100 0000
ReadFile( m_hDigitalIO,
&data,
dwBytesToRead,
&dwBytesToRead,
NULL
);
if( dwBytesToRead != 1 )
{
DWORD dwLastError = GetLastError();
TRACE( L"[CSLK2DlgWnd::ReadPortPin] can't read from i/o port pin:%d, error (%d)\r\n"
, _nPin
, dwLastError );
}
if( data )
TRACE( L"[CSLK2DlgWnd::ReadPortPin] data received\n" );
bRet = data & dwMask;
return bRet;
}

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Here are the Reg-Settings:

Code

"UsesAsIOA"=dword:0000ffff
"DataDirA"=dword:00002000
"Prefix"="DIO"
"Dll"="PM6_DIGIO.dll"
"Order"=dword:00000097
"Index"=dword:00000001
"Ioctl"=dword:00000004
"Port"=dword:00000001
"FriendlyName"="Digital I/O driver for PicoMOD6"

Thanx !

fs-support_MK · Mar 23rd 2011

We will check this again.
Could you please enable some debug messages and check if there appears an error?

Code

reg open \drivers\builtin\digitalio
reg set val debug dword 0xffff
reg save

Maybe you could also test this with a small sample application available in this forum:
DIO Read/Write Port dialog based application

SML · Mar 23rd 2011

I have set the debug reg key, but i get no debug messages and no error message !

Now i try the sample from you, but still there is a linker error:
coredll.lib(COREDLL.dll) : fatal error LNK1112: Modul-Computertyp "THUMB" steht in Konflikt mit dem Zielcomputertyp "ARM

Maybe a conversion problem, because of Visual Studio 2008.

fs-support_MK · Mar 23rd 2011

Quote from "SML"

I have set the debug reg key, but i get no debug messages and no error message !

Could you post the complete debug trace? At least during DIO intialization there should be some messages that tells about pin configuration.

Quote from "SML"

Now i try the sample from you, but still there is a linker error:
coredll.lib(COREDLL.dll) : fatal error LNK1112: Modul-Computertyp "THUMB" steht in Konflikt mit dem Zielcomputertyp "ARM

This project was based on PicoCOM2 SDK. When switching to PicoMOD6 platform type it should compile correctly.
If this does not work you could also use the available executable (Release directoy). This should also work on PicoMOD6.

SML · Mar 23rd 2011

The sample works not and there is no executable inside the zip file.

But i created a new project and copied the relevant sources and now it works on picomod6
but still no data is read from port.

Look here:

Code

DIO: +DIO_Open(0xd3170d20)
DIO: DIO_Open(0xd3170d20) returning -739717248
DIO: +DIO_Seek(): hOpenContext=0xD3E8CF80, Amount=1, Type0
DIO: -DIO_Seek(): Port 1
DIO: read Port1 chPortData=0x0
[CDIO_RWPortDlg::OnBnClickedRead] 0DIO: +DIO_Seek(): hOpenContext=0xD3E8CF80, Amount=1, Type0
DIO: -DIO_Seek(): Port 1
DIO: read Port1 chPortData=0x0
[CDIO_RWPortDlg::OnBnClickedRead] 0DIO: +DIO_Seek(): hOpenContext=0xD3E8CF80, Amount=1, Type0
DIO: -DIO_Seek(): Port 1
DIO: read Port1 chPortData=0x0
[CDIO_RWPortDlg::OnBnClickedRead] 0DIO: +DIO_Seek(): hOpenContext=0xD3E8CF80, Amount=1, Type0
DIO: -DIO_Seek(): Port 1
DIO: read Port1 chPortData=0x0
[CDIO_RWPortDlg::OnBnClickedRead] 0DIO: +DIO_Seek(): hOpenContext=0xD3E8CF80, Amount=1, Type0
DIO: -DIO_Seek(): Port 1
DIO: read Port1 chPortData=0x0
[CDIO_RWPortDlg::OnBnClickedRead] 0DIO: +DIO_Seek(): hOpenContext=0xD3E8CF80, Amount=1, Type0
DIO: -DIO_Seek(): Port 1
DIO: read Port1 chPortData=0x0
[CDIO_RWPortDlg::OnBnClickedRead] 0

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fs-support_MK · Mar 23rd 2011

Thanks for you efforts.
We will check this issue in detail and post the results in this thread.

fs-support_MA · Mar 24th 2011

I can't reproduce your issue!

For my tests I use the sample application and the same registry settings.

Quote

"UsesAsIOA"=dword:0000ffff
"DataDirA"=dword:00002000
"Prefix"="DIO"
"Dll"="PM6_DIGIO.dll"
"Order"=dword:00000097
"Index"=dword:00000001
"Ioctl"=dword:00000004
"Port"=dword:00000001
"FriendlyName"="Digital I/O driver for PicoMOD6"

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The pins as standard high(0xFF) so I use an pull down to register any change. With an pull down the tool shows 0xBF.

fs-support_MK · Mar 24th 2011

Maybe you have another PicoMOD6 to verify if the IO-Pins of your current board are damaged?
Did you run this test on your own base board?

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