Siemens 7 - Manual (Page 27)

Multiplexer Driver Developer’s Guide
7 Additional Source Documentation
s
Mux_Drv_DevGuide_v07 Page 27 of 36 2006-9-27
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7 Additional Source Documentation
This chapter contains additional flow charts and state diagrams which give more detailed information on the
structure and the content of the sources.
7.1 Interaction of the Different Driver Objects
Figure 3: Interaction of the different driver objects
Object chart of the device driver winmux2k.sys
PORT_OBJ
(virtual serial port)
Device extension
- struct DEVICE
Device object
IRP_QUEUE Read queue
Port objects DLIST
Wait Irp for serial events
Control Irp for serial driver
IRP_QUEUE Write queue
SendBuffer
RcvBuffer
WinMux object
IRP Complete object
Driver object "winmux2k"
SER_PORT
CIRCBUF Objects for circular send
and receive buffer
Buffer for read and write requests
DLIST Sendqueue
DLIST Rcv queue
Parameter for the virtual serial port
Context
SerMux
PtrSerPort[] *SerMux
SerPort0 object
ChkFrame object
WDM - Model ANSI-C
DPOOL request pool