Internal Driver States; Figure 4: State Diagram Of The Internal Driver States - Siemens 7 Developer's Manual

s
Multiplexer Driver Developer's Guide

7.2 Internal Driver States

7.2 Internal Driver States
SerMux internal states
STATE_CLOSE_
DOWN
initial state
rcv. a DM-Frame
send a SABM-Frame
STATE_
DISCONNECT
WrConnectPort()
send aSABM-Frame
STATE_
DISCONNECT
REQUEST rcv. a DM (Disconnect)
Frame
STATE_
CONNECT_
REQUEST
WrConnectPort()
send a SABM-Frame
WrDisconnectPort(),
STATE_
send a DISC-Frame
rcv. a TEST-command
VERSION_ERROR
with a VERSION Controlbyte
this state exists
only for port 0
STATE_
VERSION_
not correct Version
STATE_
REQUEST
CONNECT
this state exists
only for port 0
Versionstring from
MS- and TS-Version are identical
for Ports other than port 0
receive a UA-Frame for the desired port

Figure 4: State diagram of the internal driver states

Mux_Drv_DevGuide_v07 Page 28 of 36 2006-9-27
Confidential / Released