XProfan

'Netzspannungslogger
 $I mpusbapi.inc
Declare dllh&
Declare vid_pid#,out_pipe#,in_pipe#
Declare myInPipe&,myOutPipe&
Declare MP_WRITE&,MP_READ&
Declare SendData#,RecData#
Declare Selection&
DIM vid_pid#,32
DIM out_pipe#,32
DIM in_pipe#,32
DIM SendData#,16
DIM RecData#,16
Declare SentLength&
String vid_pid#,0="vid_04d8&pid_ff0b"
String out_pipe#,0="\\MCHP_EP1"
String in_pipe#,0="\\MCHP_EP1"
MP_WRITE&=0
MP_READ&=1
Selection&=0
dllh&=@UseDLL("mpusbapi.dll")

IfNot dllh&

    @MessageBox ("DLL nicht geladen","Fehler",48)
    End

EndIf

PRINT MPUSBGetDLLVersion()
WaitInput
myOutPipe&=MPUSBOpen(Selection&,vid_pid#,out_pipe#,MP_WRITE&,0)'Output
myInPipe&=MPUSBOpen(Selection&,vid_pid#,out_pipe#,MP_READ&,0)'Input
BYTE SendData#,0=$51
BYTE SendData#,1=$01
BYTE SendData#,2=$01
BYTE SendData#,3=$00
PRINT "Hallo"
WaitInput
MPUSBWrite(myOutPipe&,SendData#,4,SentLength&,1000)
MPUSBRead(myInPipe&,RecData#,2,2,1000)
'PC sendet zum USB4all      Bedeutung                                                            USB4all antwortet
'0x51 - 0x01 - 0x01 - 0x00 Einschalten des ADC mit einem analogen Eingang, AN0 ist ausgewählt    16 Nonsens-Bytes
'0x51 - 0x03                Abfragen der Spannung                                                0x51 - 0x03 - low - high
'Das Low-Byte enthält die unteren 8 Bit des Messergebnisses, während die beiden oberen Bits im High-Byte stehen.
PRINT @BYTE(RecData#,0)
PRINT @BYTE(RecData#,1)
MPUSBClose&(myOutPipe&)
MPUSBClose&(myInPipe&)

IfNot dllh&

    FreeDLL dllh&

EndIf

WaitInput
End

REM Include-File für die mpusbapi.dll in Profan
DEF @MPUSBGetDLLVersion(0) !"mpusbapi","_MPUSBGetDLLVersion"
DEF @MPUSBGetDeviceCount(1) !"mpusbapi","_MPUSBGetDeviceCount"
DEF @MPUSBOpen(5) !"mpusbapi","_MPUSBOpen"
DEF @MPUSBRead(5) !"mpusbapi","_MPUSBRead"
DEF @MPUSBWrite(5) !"mpusbapi","_MPUSBWrite"
DEF @MPUSBReadInt(5) !"mpusbapi","_MPUSBReadInt"
DEF @MPUSBClose(1) !"mpusbapi","_MPUSBClose"

/*********************************************************************
*
*                  MPUSBAPI Library Version 1.00
*
*********************************************************************
* FileName:        _mpusbapi.cpp
* Dependencies:    See #include section below.
* Compiler:        Borland C++ Builder 6
* Company:         Copyright (C) 2004 by Microchip Technology, Inc.
*
* Software License Agreement
*
* The software supplied herewith by Microchip Technology Incorporated
* (the “Company”) for its PICmicro® Microcontroller is intended and
* supplied to you, the Company’s customer, for use solely and
* exclusively on Microchip PICmicro Microcontroller products. The
* software is owned by the Company and/or its supplier, and is
* protected under applicable copyright laws. All rights are reserved.
* Any use in violation of the foregoing restrictions may subject the
* user to criminal sanctions under applicable laws, as well as to
* civil liability for the breach of the terms and conditions of this
* license.
*
* THIS SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION. NO WARRANTIES,
* WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED
* TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,
* IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
* CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
*
* Author               Date        Comment
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* Ross Fosler          9/2/04      Implemented MPUSBGetDeviceLink()
* Rawin Rojvanit       11/19/04    Original version 1.00 completed
********************************************************************/
#include <stdio.h>
#include <windows.h>
#include <string.h>
#include <setupapi.h>
#include <initguid.h>
#include <winioctl.h>
#include "ioctls.h"
#include "_mpusbapi.h"
#define MPUSBAPI_VERSION            0x00010000L
#define	MPUSB_DEV_NO_INFO           2
#define	MPUSB_DEV_INVALID_INST      3
#define	MPUSB_DEV_VIDPID_NOT_FOUND  4
#define MPUSB_DEV_NOT_ATTACHED      5
#pragma argsused
int WINAPI DllEntryPoint(HINSTANCE hinst, unsigned long reason, void* lpReserved)

{

    return 1;

}

///////////////////////////////////////////////////////////////////////////////
//	MPUSBGetDLLVersion : get mpusbapi.dll revision level
//
//	Input:
//		None
//	Output:
//		32-bit revision level MMMMmmmm
//
DWORD MPUSBGetDLLVersion(void)

{

    return MPUSBAPI_VERSION;

}//end MPUSBGetDLLVersion

///////////////////////////////////////////////////////////////////////////////
//	MPUSBIsVidPidEqual : Compares the pVID_PID string against the DeviceInstance
//  string retrieved from the registry using the DevicePath subkey.
//  This function should be called only from MPUSBGetDevicePath().
//
//  Note:
//  All Windows version has the DeviceClasses information stored in:
//  HKEY_LOCAL_MACHINE\\System\\CurrentControlSet\\Control\\DeviceClasses\\
//  {GUID_DEVINTERFACE_MCHPUSB}\\<DevicePath>
//  Win98SE,ME have different DevicePath string format from 2K,XP.
//  It does not contain vid&pid information in the DevicePath.
//  Thus necessitating the needs to check the DeviceInstance string in the
//  registry.
//
//	Note that "input" and "output" refer to the parameter designations in calls
//	to this function, which are the opposite of common sense from the
//	perspective of an application making the calls.
//
DWORD MPUSBIsVidPidEqual(PCHAR pDevicePath, PCHAR pVID_PID)

{

    DWORD dwResult = MPUSB_FAIL;
    char lszValue[255];
    char lpSubKey[512];
    HKEY hKey;
    LONG returnStatus;
    DWORD dwType=REG_SZ;
    DWORD dwSize=255;
    GUID guid = GUID_DEVINTERFACE_MCHPUSB;
    /* Modify DevicePath to use registry format */
    pDevicePath[0] ='#';
    pDevicePath[1] ='#';
    pDevicePath[3] ='#';
    /* Form SubKey */
    wsprintf(lpSubKey,
    "SYSTEM\\CURRENTCONTROLSET\\CONTROL\\DEVICECLASSES\\{%4.2x-%2.2x-%2.2x-%.2x%.2x-%.2x%.2x%.2x%.2x%.2x%.2x}\\%s",
    guid.Data1,guid.Data2,guid.Data3,guid.Data4[0],guid.Data4[1],guid.Data4[2],
    guid.Data4[3],guid.Data4[4],guid.Data4[5],guid.Data4[6],guid.Data4[7],pDevicePath);
    /* Open Key */
    returnStatus = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
    lpSubKey,
    0L,
    KEY_ALL_ACCESS,
    &hKey);
    if(returnStatus == ERROR_SUCCESS)

    {

        returnStatus = RegQueryValueEx(hKey,
        "DeviceInstance",
        NULL,
        &dwType,
        (LPBYTE)&lszValue,
        &dwSize);
        if(returnStatus == ERROR_SUCCESS)

        {

            /*
            * The string info stored in 'DeviceInstance' is the same
            * across all Windows platforms: 98SE, ME, 2K, and XP.
            * Upper-case in 98SE,ME.
            * Converts all to lower-case anyway.
            */
            strlwr(lszValue);
            if(strstr(lszValue,pVID_PID) != NULL)

            {

                dwResult = MPUSB_SUCCESS;

            }

        }

    }

    RegCloseKey(hKey);
    /* Modify DevicePath to use the original format */
    pDevicePath[0] ='\\';
    pDevicePath[1] ='\\';
    pDevicePath[3] ='\\';
    return dwResult;

}//end

///////////////////////////////////////////////////////////////////////////////
//	MPUSBGetDeviceLink : Returns the path to device hardware with a given
//  instance number.
//
//	Note that "input" and "output" refer to the parameter designations in calls
//	to this function, which are the opposite of common sense from the
//	perspective of an application making the calls.
//
DWORD MPUSBGetDeviceLink(DWORD instance,// Input
PCHAR pVID_PID,// Input
PCHAR pPath,// Output
DWORD dwLen,// Input
PDWORD pLength)// Output

{

    if(pLength != NULL)*pLength = 0;// Initialization
    HDEVINFO info = SetupDiGetClassDevs((LPGUID)&GUID_DEVINTERFACE_MCHPUSB,
    NULL,
    NULL,
    DIGCF_PRESENT|DIGCF_DEVICEINTERFACE);
    if(info==INVALID_HANDLE_VALUE)

    {

        SetupDiDestroyDeviceInfoList(info);
        return MPUSB_DEV_NO_INFO;

    }// end if

    // Get interface data for the requested instance
    SP_DEVICE_INTERFACE_DATA intf_data;
    intf_data.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
    if(!SetupDiEnumDeviceInterfaces(info,
    NULL,
    (LPGUID)&GUID_DEVINTERFACE_MCHPUSB,
    instance,
    &intf_data))

    {

        SetupDiDestroyDeviceInfoList(info);
        return MPUSB_DEV_INVALID_INST;

    }// end if

    // Get size of symbolic link
    DWORD ReqLen;
    SetupDiGetDeviceInterfaceDetail(info, &intf_data, NULL, 0, &ReqLen, NULL);
    PSP_DEVICE_INTERFACE_DETAIL_DATA intf_detail = \
    (PSP_DEVICE_INTERFACE_DETAIL_DATA)(new char[ReqLen]);
    if( intf_detail == NULL)

    {

        SetupDiDestroyDeviceInfoList(info);
        delete intf_detail;
        return MPUSB_DEV_NO_INFO;

    }// end if

    // Get symbolic link name
    intf_detail->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);
    // sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA) should equals 5.
    // In C++ Builder, go to Project/Options/Advanced Compiler/Data Alignment
    // and select "byte" align.
    if(!SetupDiGetDeviceInterfaceDetail(info,
    &intf_data,
    intf_detail,
    ReqLen,
    NULL,
    NULL))

    {

        SetupDiDestroyDeviceInfoList(info);
        delete intf_detail;
        return MPUSB_DEV_NO_INFO;

    }// end if

    // Check for a valid VID&PID - if argument is not null)
    if(pVID_PID != NULL)

    {

        if(MPUSBIsVidPidEqual(intf_detail->DevicePath, pVID_PID) == NULL)

        {

            SetupDiDestroyDeviceInfoList(info);
            delete intf_detail;
            return MPUSB_DEV_VIDPID_NOT_FOUND;

        }// end if

    }// end if

    // Set the length of the path string
    if(pLength != NULL)
    *pLength = (DWORD)strlen(intf_detail->DevicePath);
    // Copy output string path to buffer pointed to by pPath
    if(pPath != NULL)

    {

        // Check that input buffer has enough room...
        // Use > not >= because strlen does not include null
        if(dwLen > strlen(intf_detail->DevicePath))
        strcpy(pPath, intf_detail->DevicePath);

    else

        {

            SetupDiDestroyDeviceInfoList(info);
            delete intf_detail;
            return MPUSB_FAIL;

        }// end if

    }// end if

    // Clean up
    SetupDiDestroyDeviceInfoList(info);
    delete intf_detail;
    return MPUSB_SUCCESS;

}// end MPUSBGetDeviceLink

///////////////////////////////////////////////////////////////////////////////
//	MPUSBGetDeviceCount : Returns the number of devices with matching VID & PID
//
//	Note that "input" and "output" refer to the parameter designations in calls
//	to this function, which are the opposite of common sense from the
//	perspective of an application making the calls.
//
DWORD MPUSBGetDeviceCount(PCHAR pVID_PID)

{

    DWORD count;// Number of USB device with matching VID & PID
    count = 0;// Initialization
    for(int i = 0; i < MAX_NUM_MPUSB_DEV; i++)

    {

        if(MPUSBGetDeviceLink(i,pVID_PID,NULL,NULL,NULL) == MPUSB_SUCCESS)
        count++;

    }//end for

    return count;

}//end MPUSBGetDeviceCount

///////////////////////////////////////////////////////////////////////////////
//	MPUSBOpen : Returns the handle to the endpoint pipe with matching VID & PID
//
//  All pipes are opened with the FILE_FLAG_OVERLAPPED attribute.
//  This allows MPUSBRead,MPUSBWrite, and MPUSBReadInt to have a time-out value.
//
//  Note: Time-out value has no meaning for Isochronous pipes.
//
//  instance - An instance number of the device to open.
//             Typical usage is to call MPUSBGetDeviceCount first to find out
//             how many instances there are.
//             It is important to understand that the driver is shared among
//             different devices. The number of devices returned by
//             MPUSBGetDeviceCount could be equal to or less than the number
//             of all the devices that are currently connected & using the
//             generic driver.
//
//             Example:
//             if there are 3 device with the following PID&VID connected:
//             Device Instance 0, VID 0x04d8, PID 0x0001
//             Device Instance 1, VID 0x04d8, PID 0x0002
//             Device Instance 2, VID 0x04d8, PID 0x0001
//
//             If the device of interest has VID = 0x04d8 and PID = 0x0002
//             Then MPUSBGetDeviceCount will only return '1'.
//             The calling function should have a mechanism that attempts
//             to call MPUSBOpen up to the absolute maximum of MAX_NUM_MPUSB_DEV
//             (MAX_NUM_MPUSB_DEV is defined in _mpusbapi.h).
//             It should also keep track of the number of successful calls
//             to MPUSBOpen(). Once the number of successes equals the
//             number returned by MPUSBGetDeviceCount, the attempts should
//             be aborted because there will no more devices with
//             a matching vid&pid left.
//
//  pVID_PID - A string containing the PID&VID value of the target device.
//             The format is "vid_xxxx&pid_yyyy". Where xxxx is the VID value
//             in hex and yyyy is the PID value in hex.
//             Example: If a device has the VID value of 0x04d8 and PID value
//                      of 0x000b, then the input string should be:
//                      "vid_04d8&pid_000b"
//
//  pEP      - A string of the endpoint number on the target endpoint to open.
//             The format is "\\MCHP_EPz". Where z is the endpoint number in
//             decimal.
//             Example: "\\MCHP_EP1"
//
//             This arguement can be NULL. A NULL value should be used to
//             create a handles for non-specific endpoint functions.
//             MPUSBRead, MPUSBWrite, MPUSBReadInt are endpoint specific
//             functions.
//             All others are not.
//             Non-specific endpoint functions will become available in the
//             next release of the DLL.
//
//             Note: To use MPUSBReadInt(), the format of pEP has to be
//                   "\\MCHP_EPz_ASYNC". This option is only available for
//                   an IN interrupt endpoint. A data pipe opened with the
//                   "_ASYNC" keyword would buffer the data at the interval
//                   specified in the endpoint descriptor upto the maximum of
//                   100 data sets. Any data received after the driver buffer
//                   is full will be ignored.
//                   The user application should call MPUSBReadInt() often
//                   enough so that the maximum limit of 100 is never reached.
//
//  dwDir    - Specifies the direction of the endpoint.
//             Use MP_READ for MPUSBRead, MPSUBReadInt
//             Use MP_WRITE for MPUSBWrite
//
//  dwReserved Future Use
//
//  Summary of transfer type usage:
//  ============================================================================
//  Transfer Type       Functions                       Time-Out Applicable?
//  ============================================================================
//  Interrupt - IN      MPUSBRead, MPUSBReadInt         Yes
//  Interrupt - OUT     MPUSBWrite                      Yes
//  Bulk - IN           MPUSBRead                       Yes
//  Bulk - OUT          MPUSBWrite                      Yes
//  Isochronous - IN    MPUSBRead                       No
//  Isochronous - OUT   MPUSBWrite                      No
//  ============================================================================
//
//	Note that "input" and "output" refer to the parameter designations in calls
//	to this function, which are the opposite of common sense from the
//	perspective of an application making the calls.
//
HANDLE MPUSBOpen(DWORD instance,// Input
PCHAR pVID_PID,// Input
PCHAR pEP,// Input
DWORD dwDir,// Input
DWORD dwReserved)// Input <Future Use>

{

    char path[MAX_PATH];
    DWORD dwReqLen;
    HANDLE handle;
    handle = INVALID_HANDLE_VALUE;
    // Check arguments first
    if((pVID_PID != NULL) && ((dwDir == MP_WRITE) || (dwDir == MP_READ)))

    {

        if(MPUSBGetDeviceLink(instance,pVID_PID,path,MAX_PATH,&dwReqLen)==\
        MPUSB_SUCCESS)

        {

            char path_io[MAX_PATH];
            strcpy(path_io,path);
            if(pEP != NULL) strcat(path_io,pEP);
            if(dwDir == MP_READ)

            {

                handle = CreateFile(path_io,
                GENERIC_READ,
                0,
                NULL,
                OPEN_EXISTING,
                FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED,
                NULL);

            }

        else

            {

                handle = CreateFile(path_io,
                GENERIC_WRITE,
                0,
                NULL,
                OPEN_EXISTING,
                FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED,
                NULL);

            }//end if

        }//end if

    }//end if

    return handle;

}//end MPUSBOpen(...)

///////////////////////////////////////////////////////////////////////////////
//	MPUSBGetDeviceDescriptor : Returns the Device Descriptor Data
//
//  **** INCOMPLETE ****
//
//	Note that "input" and "output" refer to the parameter designations in calls
//	to this function, which are the opposite of common sense from the
//	perspective of an application making the calls.
//
DWORD MPUSBGetDeviceDescriptor(HANDLE handle,// Input
PVOID pDevDsc,// Output
DWORD dwLen,// Input
PDWORD pLength)// Output

{

    GET_DESCRIPTOR_PARAMETER dscParam;
    if(pLength != NULL)*pLength = 0;
    //if(pDevDsc == NULL) return MPUSB_FAIL;
    dscParam.bType =  USB_DEVICE_DESCRIPTOR_TYPE;
    if(!DeviceIoControl(handle,
    IOCTL_MCHPUSB_GET_DESCRIPTOR,
    &dscParam,
    sizeof(GET_DESCRIPTOR_PARAMETER),
    pDevDsc,
    dwLen,
    pLength,
    NULL))

    {

        printf("Get dsc error: %d",GetLastError());
        return MPUSB_FAIL;

    }//end if

    return MPUSB_SUCCESS;

}// MPUSBGetDeviceDescriptor

//  **** INCOMPLETE ****
DWORD MPUSBGetConfigInfoSize(HANDLE handle)

{

    DWORD config_size;
    DWORD dwReqLen;
    DeviceIoControl(handle,
    IOCTL_MCHPUSB_GET_CONFIGURATION_INFO,
    NULL,
    0,
    &config_size,
    sizeof(DWORD),
    &dwReqLen,
    NULL);
    return config_size;

}//end MPUSBGetConfigInfoSize

//  **** INCOMPLETE ****
DWORD MPUSBGetConfigInfo(HANDLE handle,// Input
PVOID pData,// Output
DWORD dwLen)// Input

{

    DWORD dwReqLen;
    if(!DeviceIoControl(handle,
    IOCTL_MCHPUSB_GET_CONFIGURATION_INFO,
    NULL,
    0,
    pData,
    dwLen,
    &dwReqLen,
    NULL))

    {

        printf("Get config error: %d",GetLastError());
        return MPUSB_FAIL;

    }//end if

    return MPUSB_SUCCESS;

}//end MPUSBGetConfigInfo

//  **** INCOMPLETE ****
void MPUSBSendControl(void)

{

}

//  **** INCOMPLETE ****
void MPUSBGetControl(void)

{

}

///////////////////////////////////////////////////////////////////////////////
//	MPUSBRead :
//
//  handle  - Identifies the endpoint pipe to be read. The pipe handle must
//            have been created with MP_READ access attribute.
//
//  pData   - Points to the buffer that receives the data read from the pipe.
//
//  dwLen   - Specifies the number of bytes to be read from the pipe.
//
//  pLength - Points to the number of bytes read. MPUSBRead sets this value to
//            zero before doing any work or error checking.
//
//  dwMilliseconds
//          - Specifies the time-out interval, in milliseconds. The function
//            returns if the interval elapses, even if the operation is
//            incomplete. If dwMilliseconds is zero, the function tests the
//            data pipe and returns immediately. If dwMilliseconds is INFINITE,
//            the function's time-out interval never elapses.
//
//	Note that "input" and "output" refer to the parameter designations in calls
//	to this function, which are the opposite of common sense from the
//	perspective of an application making the calls.
//
DWORD MPUSBRead(HANDLE handle,// Input
PVOID pData,// Output
DWORD dwLen,// Input
PDWORD pLength,// Output
DWORD dwMilliseconds)// Input

{

    BOOL bResult;
    DWORD nBytesRead;
    OVERLAPPED gOverlapped;
    DWORD dwResult;
    dwResult = MPUSB_FAIL;
    // set up overlapped structure fields
    gOverlapped.Internal     = 0;
    gOverlapped.InternalHigh = 0;
    gOverlapped.Offset       = 0;
    gOverlapped.OffsetHigh   = 0;
    gOverlapped.hEvent       = CreateEvent(NULL, FALSE, FALSE, NULL);
    if(pLength != NULL)*pLength = 0;
    // attempt an asynchronous read operation
    bResult = ReadFile(handle,pData,dwLen,&nBytesRead,&gOverlapped);
    if(!bResult)

    {

        // deal with the error code
        switch (GetLastError())

        {

            case ERROR_HANDLE_EOF:

            {

                // we have reached the end of the file
                // during the call to ReadFile
                break;

            }

            case ERROR_IO_PENDING:

            {

                // asynchronous i/o is still in progress
                switch(WaitForSingleObject(gOverlapped.hEvent, dwMilliseconds))

                {

                    case WAIT_OBJECT_0:
                    // check on the results of the asynchronous read
                    // and update the nBytesRead...
                    bResult = GetOverlappedResult(handle, &gOverlapped,
                    &nBytesRead, FALSE);
                    if(!bResult)

                    {

                        printf("Error: %d", GetLastError());

                    }

                else

                    {

                        if(pLength != NULL)
                        *pLength = nBytesRead;
                        dwResult = MPUSB_SUCCESS;

                    }//end if else

                    break;
                    case WAIT_TIMEOUT:
                    CancelIo(handle);
                    break;
                    default:
                    CancelIo(handle);
                    break;

                }//end switch

            }//end case

            default:
            CancelIo(handle);
            break;

        }//end switch

    }

else

    {

        if(pLength != NULL)
        *pLength = nBytesRead;
        dwResult = MPUSB_SUCCESS;

    }//end if else

    ResetEvent(gOverlapped.hEvent);
    CloseHandle(gOverlapped.hEvent);
    return dwResult;

}//end MPUSBRead

///////////////////////////////////////////////////////////////////////////////
//	MPUSBWrite :
//
//  handle  - Identifies the endpoint pipe to be written to. The pipe handle
//            must have been created with MP_WRITE access attribute.
//
//  pData   - Points to the buffer containing the data to be written to the pipe.
//
//  dwLen   - Specifies the number of bytes to write to the pipe.
//
//  pLength - Points to the number of bytes written by this function call.
//            MPUSBWrite sets this value to zero before doing any work or
//            error checking.
//
//  dwMilliseconds
//          - Specifies the time-out interval, in milliseconds. The function
//            returns if the interval elapses, even if the operation is
//            incomplete. If dwMilliseconds is zero, the function tests the
//            data pipe and returns immediately. If dwMilliseconds is INFINITE,
//            the function's time-out interval never elapses.
//
//	Note that "input" and "output" refer to the parameter designations in calls
//	to this function, which are the opposite of common sense from the
//	perspective of an application making the calls.
//
DWORD MPUSBWrite(HANDLE handle,// Input
PVOID pData,// Input
DWORD dwLen,// Input
PDWORD pLength,// Output
DWORD dwMilliseconds)// Input

{

    BOOL bResult;
    DWORD nBytesWritten;
    OVERLAPPED gOverlapped;
    DWORD dwResult;
    dwResult = MPUSB_FAIL;
    // set up overlapped structure fields
    gOverlapped.Internal     = 0;
    gOverlapped.InternalHigh = 0;
    gOverlapped.Offset       = 0;
    gOverlapped.OffsetHigh   = 0;
    gOverlapped.hEvent       = CreateEvent(NULL, FALSE, FALSE, NULL);
    if(pLength != NULL)*pLength = 0;
    // attempt an asynchronous read operation
    bResult = WriteFile(handle,pData,dwLen,&nBytesWritten,&gOverlapped);
    if(!bResult)

    {

        // deal with the error code
        switch (GetLastError())

        {

            case ERROR_HANDLE_EOF:

            {

                // we have reached the end of the file
                // during the call to ReadFile
                break;

            }

            case ERROR_IO_PENDING:

            {

                // asynchronous i/o is still in progress
                switch(WaitForSingleObject(gOverlapped.hEvent, dwMilliseconds))

                {

                    case WAIT_OBJECT_0:
                    // check on the results of the asynchronous read
                    // and update the nBytesWritten...
                    bResult = GetOverlappedResult(handle, &gOverlapped,
                    &nBytesWritten, FALSE);
                    if(!bResult)

                    {

                        printf("Error: %d", GetLastError());

                    }

                else

                    {

                        if(pLength != NULL)
                        *pLength = nBytesWritten;
                        dwResult = MPUSB_SUCCESS;

                    }//end if else

                    break;
                    case WAIT_TIMEOUT:
                    CancelIo(handle);
                    break;
                    default:
                    CancelIo(handle);
                    break;

                }//end switch

            }//end case

            default:
            CancelIo(handle);
            break;

        }//end switch

    }

else

    {

        if(pLength != NULL)
        *pLength = nBytesWritten;
        dwResult = MPUSB_SUCCESS;

    }//end if else

    ResetEvent(gOverlapped.hEvent);
    CloseHandle(gOverlapped.hEvent);
    return dwResult;

}//end MPUSBWrite

///////////////////////////////////////////////////////////////////////////////
//	MPUSBReadInt :
//
//  handle  - Identifies the endpoint pipe to be read. The pipe handle must
//            have been created with MP_READ access attribute.
//
//  pData   - Points to the buffer that receives the data read from the pipe.
//
//  dwLen   - Specifies the number of bytes to be read from the pipe.
//
//  pLength - Points to the number of bytes read. MPUSBRead sets this value to
//            zero before doing any work or error checking.
//
//  dwMilliseconds
//          - Specifies the time-out interval, in milliseconds. The function
//            returns if the interval elapses, even if the operation is
//            incomplete. If dwMilliseconds is zero, the function tests the
//            data pipe and returns immediately. If dwMilliseconds is INFINITE,
//            the function's time-out interval never elapses.
//
//	Note that "input" and "output" refer to the parameter designations in calls
//	to this function, which are the opposite of common sense from the
//	perspective of an application making the calls.
//
DWORD MPUSBReadInt(HANDLE handle,// Input
PVOID pData,// Output
DWORD dwLen,// Input
PDWORD pLength,// Output
DWORD dwMilliseconds)// Input

{

    BOOL bResult;
    DWORD nBytesRead;
    OVERLAPPED gOverlapped;
    DWORD dwResult;
    dwResult = MPUSB_FAIL;
    // set up overlapped structure fields
    gOverlapped.Internal     = 0;
    gOverlapped.InternalHigh = 0;
    gOverlapped.Offset       = 0;
    gOverlapped.OffsetHigh   = 0;
    gOverlapped.hEvent       = CreateEvent(NULL, FALSE, FALSE, NULL);
    if(pLength != NULL)*pLength = 0;
    if(pData == NULL)

    {

        SetLastError(ERROR_NOACCESS);
        return dwResult;

    }//end if

    // attempt an asynchronous read operation
    bResult = DeviceIoControl(handle,
    IOCTL_MCHPUSB_WAIT_INTERRUPT,
    NULL,
    0,
    pData,
    dwLen,
    &nBytesRead,
    &gOverlapped);
    if(!bResult)

    {

        // deal with the error code
        switch (GetLastError())

        {

            case ERROR_HANDLE_EOF:

            {

                // we have reached the end of the file
                // during the call to ReadFile
                break;

            }

            case ERROR_IO_PENDING:

            {

                // asynchronous i/o is still in progress
                switch(WaitForSingleObject(gOverlapped.hEvent, dwMilliseconds))

                {

                    case WAIT_OBJECT_0:
                    // check on the results of the asynchronous read
                    // and update the nBytesRead...
                    bResult = GetOverlappedResult(handle, &gOverlapped,
                    &nBytesRead, FALSE);
                    if(!bResult)

                    {

                        printf("Error: %d", GetLastError());

                    }

                else

                    {

                        if(pLength != NULL)
                        *pLength = nBytesRead;
                        dwResult = MPUSB_SUCCESS;

                    }//end if else

                    break;
                    case WAIT_TIMEOUT:
                    CancelIo(handle);
                    break;
                    default:
                    CancelIo(handle);
                    break;

                }//end switch

            }//end case

            default:
            CancelIo(handle);
            break;

        }//end switch

    }

else

    {

        if(pLength != NULL)
        *pLength = nBytesRead;
        dwResult = MPUSB_SUCCESS;

    }//end if else

    ResetEvent(gOverlapped.hEvent);
    CloseHandle(gOverlapped.hEvent);
    return dwResult;

}//end MPUSBReadInt

///////////////////////////////////////////////////////////////////////////////
//	MPUSBClose : closes a given handle.
//
//	Note that "input" and "output" refer to the parameter designations in calls
//	to this function, which are the opposite of common sense from the
//	perspective of an application making the calls.
//
BOOL MPUSBClose(HANDLE handle)

{

    BOOL toReturn;
    toReturn = true;
    if(handle != INVALID_HANDLE_VALUE)
    toReturn = CloseHandle(handle);
    return toReturn;

}//end MPUSBClose

//---------------------------------------------------------------------------

* Seven basic functions are provided in this release:
- MPUSBGetDeviceCount
- MPUSBOpen
- MPUSBClose
- MPUSBRead
- MPUSBReadInt
- MPUSBWrite
- MPUSBGetDLLVersion
---------------------------------------------------------------------------------
MPUSBGetDLLVersion : get mpusbapi.dll revision level
//	Input:
//		None
//	Output:
//		32-bit revision level MMMMmmmm
MPUSBIsVidPidEqual : Compares the pVID_PID string against the DeviceInstance
string retrieved from the registry using the DevicePath subkey.
This function should be called only from MPUSBGetDevicePath().
MPUSBGetDeviceLink : Returns the path to device hardware with a given instance number.
MPUSBGetDeviceCount : Returns the number of devices with matching VID & PID
MPUSBOpen : Returns the handle to the endpoint pipe with matching VID & PID
MPUSBGetDeviceDescriptor : Returns the Device Descriptor Data
MPUSBRead :
//
//  handle  - Identifies the endpoint pipe to be read. The pipe handle must
//            have been created with MP_READ access attribute.
//
//  pData   - Points to the buffer that receives the data read from the pipe.
//
//  dwLen   - Specifies the number of bytes to be read from the pipe.
//
//  pLength - Points to the number of bytes read. MPUSBRead sets this value to
//            zero before doing any work or error checking.
//
//  dwMilliseconds
//          - Specifies the time-out interval, in milliseconds. The function
//            returns if the interval elapses, even if the operation is
//            incomplete. If dwMilliseconds is zero, the function tests the
//            data pipe and returns immediately. If dwMilliseconds is INFINITE,
//            the function's time-out interval never elapses.
MPUSBWrite :
//
//  handle  - Identifies the endpoint pipe to be written to. The pipe handle
//            must have been created with MP_WRITE access attribute.
//
//  pData   - Points to the buffer containing the data to be written to the pipe.
//
//  dwLen   - Specifies the number of bytes to write to the pipe.
//
//  pLength - Points to the number of bytes written by this function call.
//            MPUSBWrite sets this value to zero before doing any work or
//            error checking.
//
//  dwMilliseconds
//          - Specifies the time-out interval, in milliseconds. The function
//            returns if the interval elapses, even if the operation is
//            incomplete. If dwMilliseconds is zero, the function tests the
//            data pipe and returns immediately. If dwMilliseconds is INFINITE,
//            the function's time-out interval never elapses.
MPUSBReadInt :
//
//  handle  - Identifies the endpoint pipe to be read. The pipe handle must
//            have been created with MP_READ access attribute.
//
//  pData   - Points to the buffer that receives the data read from the pipe.
//
//  dwLen   - Specifies the number of bytes to be read from the pipe.
//
//  pLength - Points to the number of bytes read. MPUSBRead sets this value to
//            zero before doing any work or error checking.
//
//  dwMilliseconds
//          - Specifies the time-out interval, in milliseconds. The function
//            returns if the interval elapses, even if the operation is
//            incomplete. If dwMilliseconds is zero, the function tests the
//            data pipe and returns immediately. If dwMilliseconds is INFINITE,
//            the function's time-out interval never elapses.
MPUSBClose : closes a given handle.
-------------------------------------------------------------------------------------
//  Summary of transfer type usage:
//  ============================================================================
//  Transfer Type       Functions                       Time-Out Applicable?
//  ============================================================================
//  Interrupt - IN      MPUSBRead, MPUSBReadInt         Yes
//  Interrupt - OUT     MPUSBWrite                      Yes
//  Bulk - IN           MPUSBRead                       Yes
//  Bulk - OUT          MPUSBWrite                      Yes
//  Isochronous - IN    MPUSBRead                       No
//  Isochronous - OUT   MPUSBWrite                      No
//  ============================================================================
------------------------------------------------------------------------
extern "C" __declspec(dllexport)
DWORD MPUSBGetDLLVersion(void);
extern "C" __declspec(dllexport)
DWORD MPUSBGetDeviceCount(PCHAR pVID_PID);
extern "C" __declspec(dllexport)
HANDLE MPUSBOpen(DWORD instance,// Input
PCHAR pVID_PID,// Input
PCHAR pEP,// Input
DWORD dwDir,// Input
DWORD dwReserved);// Input <Future Use>
extern "C" __declspec(dllexport)
DWORD MPUSBRead(HANDLE handle,// Input
PVOID pData,// Output
DWORD dwLen,// Input
PDWORD pLength,// Output
DWORD dwMilliseconds);// Input
extern "C" __declspec(dllexport)
DWORD MPUSBWrite(HANDLE handle,// Input
PVOID pData,// Input
DWORD dwLen,// Input
PDWORD pLength,// Output
DWORD dwMilliseconds);// Input
extern "C" __declspec(dllexport)
DWORD MPUSBReadInt(HANDLE handle,// Input
PVOID pData,// Output
DWORD dwLen,// Input
PDWORD pLength,// Output
DWORD dwMilliseconds);// Input
extern "C" __declspec(dllexport)
BOOL MPUSBClose(HANDLE handle);

HANDLE MPUSBOpen(DWORD instance,// Input
PCHAR pVID_PID,// Input
PCHAR pEP,// Input
DWORD dwDir,// Input
DWORD dwReserved);// Input <Future Use>

Const
MAXSIZE           = 64;
MPUSB_FAIL        = 0;
MPUSB_SUCCESS     = 1;
MP_WRITE:DWORD    = 0;
MP_READ:DWORD     = 1;
MAX_NUM_MPUSB_DEV = 127;
type
DWORD  = LongInt;
PCHAR8 = array[0..MAXSIZE] of char;

MPUSBOpen(Selection&,vid_pid#,out_pipe#,MP_WRITE&,0)

MPUSBGetDeviceCount(vid_pid$)

myOutPipe&=MPUSBOpen(Selection&,vid_pid$,out_pipe#,MP_WRITE&,0)

function _MPUSBOpen(instance:DWORD;pVID_PID:PCHAR8;
pEP:PCHAR8;dwDir:DWORD;dwReserved:DWORD):
THANDLE;stdcall;external'mpusbapi.dll';

'Beispiel für die mpusbapi.dll
'für XProfan 11
'empfängt ein Wert aus dem ADC AN0
 $I mpusbapi.inc
Declare dllh&
Declare vid_pid$,out_pipe$,in_pipe$
Declare myInPipe&,myOutPipe&
Declare MP_WRITE&,MP_READ&
Declare SendData#,RecData#
Declare Selection&
Declare SentLength&,RecvLength&
Declare wert&
DIM SendData#,64
DIM RecData#,64
vid_pid$="vid_04d8&pid_ff0b"'für Sprut Gerät
out_pipe$="\MCHP_EP1"'ein Backslash!
in_pipe$="\MCHP_EP1"
MP_WRITE&=0
MP_READ&=1
Selection&=0
dllh&=@UseDLL("mpusbapi.dll")'DLL laden

IfNot dllh&

    @MessageBox ("DLL nicht geladen","Fehler",48)
    End

EndIf

myOutPipe&=MPUSBOpen(Selection&,addr(vid_pid$),addr(out_pipe$),MP_WRITE&,0)
myInPipe&=MPUSBOpen(Selection&,addr(vid_pid$),addr(in_pipe$),MP_READ&,0)
BYTE SendData#,0=$51'Subsystem ADC
BYTE SendData#,1=$01'initialisieren
BYTE SendData#,2=$04'AN0
BYTE SendData#,3=$00'Referenzspannung
MPUSBWrite(myOutPipe&,addr(SendData#),4,addr(SentLength&),1000)
MPUSBRead(myInPipe&,addr(RecData#),16,addr(RecvLength&),1000)
BYTE SendData#,0=$51'Subsystem ADC
BYTE SendData#,1=$02'nächste Messung
BYTE SendData#,2=$00'AN0
MPUSBWrite(myOutPipe&,addr(SendData#),3,addr(SentLength&),1000)
MPUSBRead(myInPipe&,addr(RecData#),16,addr(RecvLength&),1000)
BYTE SendData#,0=$51'Subsystem ADC
BYTE SendData#,1=$03'Spannung messen
MPUSBWrite(myOutPipe&,addr(SendData#),2,addr(SentLength&),1000)
MPUSBRead(myInPipe&,addr(RecData#),16,addr(RecvLength&),1000)
wert&=@BYTE(RecData#,3)*256+@BYTE(RecData#,2)
PRINT "Wert am AN0: ";
PRINT wert&
MPUSBClose(myOutPipe&)
MPUSBClose(myInPipe&)

IfNot dllh&

    FreeDLL dllh&

EndIf

WaitInput
End