Siemens 7 - Data Transfer; Block Flow Diagram for Data Received by the Module; Figure 6: Block Flow Diagram for Data Received by the Module

Multiplexer Driver Developer’s Guide
7.4 Data Transfer
s
Mux_Drv_DevGuide_v07 Page 30 of 36 2006-9-27
Confidential / Released
7.4 Data Transfer
7.4.1 Block Flow Diagram for Data Received by the Module
Figure 6: Block flow diagram for data received by the module
SerMux functions sequence, if characters from the physical Device
to the SerMux Object are indicated
W rIndicateReadBuffer
ProcessChar
Frame valid?
Address != DLCI 0
&& UIH-Frame?
DemuxIndicateFrame
SerPortIndicateFrame
other ports than 0
yes
yes
no
UIH-Frame?
UA-Frame
or
DM-Fram e?
SerPort0ConfirmRequest
no
no
yes
yes
SABM or
DISC Frame
not valid
(Master)
1
SerPort0ScanUIHControl see
sheet 2,
check a UIH-ControlFrame
return SendPort
all UIH-Control
Commands scanned?
search the next Control Command
in the
Information field
no
all bytes
scanned?
no
yes
no
no
yes
ret
SerPort0IndicateFrame()
SendPort==
TRUE?
SerM uxSend(), m ust
call if receive a FC-Bit=0, then
start the sending