Hardware & Devices

William R. Price wrote:

I still do not know if I am going in the right direction. There is very little mention of the actual interface with the hardware. I recently found some references to "I/O commands" like "READ_PORT_XXX" and "WRITE_PORT_XXX" where XXX can be UCHAR, ULONG, USHORT, ULONG64. However, most references indicate these are to be used in Windows CE

William R. Price wrote:

Do I need something to tell WDF that the interface is an ISA bus and the interface is through I/O addresses?

William R. Price wrote:

Does WDF initiate a callback to the "EvtDeviceAdd" immediately after the WdfDriverCreate? van Dooren stated, "The EvtDeviceAdd function will be called each time the system determines that a new device has been connected". If not, how do I "tell" the system that our passive board is present

Sifar - 0 wrote:

the software checks all COM Ports by sending ...

foreach(string curPortName in portNames)
{
    port.Name = curPortName;
    try
    {
        port.Open();
        // Will only break if port.Open() succeeds and does not throw an exception.
        break;
    }
    catch(InvalidOperationException ex)
    {
        // COM port does not exist, device not connected
    }
    catch(UnauthorizedAccessException ex){
        // COM Port already open
    }
}

ManagementObjectCollection ManObjCollection;
ManagementObjectSearcher ManObjSearch;

ManObjSearch = new ManagementObjectSearcher("Select * from Win32_PnPEntity");
ManObjCollection = ManObjSearch.Get();
foreach (ManagementObject ManObj in ManObjCollection)
{
  if (ManObj["Name"] == "Name You Are Looking For")
  {
      // Do Some Job..
  }
}

M. J. Jaya Chitra wrote:

When I was analyzing the log I hae found a strange issue, the Processors % Processor time is 88 % but the instances % Processor time is 175 %