how do i access the memory on my pci card using windriver.mht

精选的6个winDriver技术文档,比较权威,解决winDriver在pci驱动开发中会遇到的一些问题

                  includes the memory range chosen for the card by the =
Plug and=20
                  Play system.<BR><BR>Now call <FONT face=3DCourier=20
                  size=3D-1><B>WD_CardRegister()</B></FONT> to install =
the memory=20
                  range and map it into both kernel and user mode =
virtual=20
                  address spaces.<BR><BR>You can then either access the =
memory=20
                  <U>directly</U> from your user mode application (more=20
                  efficient), by using the user mode mapping of the =
physical=20
                  address, returned by <FONT face=3DCourier=20
                  size=3D-1>WD_CardRegister()</FONT> in:<BR>&nbsp; =
&nbsp; <FONT=20
                  face=3DCourier=20
                  =
size=3D-1>cardReg.Card.Item[i].I.Mem.<B>dwUserDirectAddr</B></FONT><BR>(w=
here=20
                  'i' is the index number of the memory range in the =
<FONT=20
                  face=3DCourier size=3D-1>Item</FONT> array), or pass =
the kernel=20
                  mode mapping of the memory, returned by <FONT =
face=3DCourier=20
                  size=3D-1>WD_CardRegister()</FONT> in:<BR>&nbsp; =
&nbsp; <FONT=20
                  face=3DCourier=20
                  =
size=3D-1>cardReg.Card.Item[i].I.Mem.<B>dwTransAddr</B></FONT><BR>to=20
                  <FONT face=3DCourier size=3D-1>WD_Transfer()</FONT> (/ =
<FONT=20
                  face=3DCourier size=3D-1>WD_MultiTransfer()</FONT>), =
in order to=20
                  access the memory in the kernel.<BR><BR>This is =
demonstrated,=20
                  for example, in the sample code found in the <FONT=20
                  face=3DCourier =
size=3D-1>WinDriver\samples\pci_diag</FONT>=20
                  directory, and in the diagnostics DriverWizard code =
that you=20
                  can generate for your PCI card.<BR>Please also refer =
to the=20
                  description of the WinDriver PCI API in the Function =
Reference=20
                  chapter of the <A class=3Dlinks=20
                  =
href=3D"http://www.jungo.com/support/manuals.html#manuals">WinDriver=20
                  User's Manual</A> for a better understanding of these=20
                  functions and the related =
structures.<BR><BR>[<B>NOTE:</B> To=20
                  access memory <U>directly</U> in the kernel, from =
within a <A=20
                  class=3Dlinks =
href=3D"http://www.jungo.com/kpi.html"><B>Kernel=20
                  PlugIn</B></A> project, you must use the kernel mode =
mapping=20
                  of the physical memory address - returned by <FONT=20
                  face=3DCourier size=3D-1>WD_CardRegister()</FONT> =
in:<BR>&nbsp;=20
                  &nbsp; <FONT face=3DCourier=20
                  =
size=3D-1>cardReg.Card.Item[i].I.Mem.<B>dwTransAddr</B></FONT><BR>and=20
                  not the user mode mapping that is used to access the =
memory=20
                  directly from your user mode application]. <BR><BR><A=20
                  class=3Dlinks=20
                  =
href=3D"http://www.jungo.com/support/tech_docs/td74.html#top">Back=20
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