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Multiplexer Driver Developer’s Guide

4.2 Settings Stored in the Windows Registry

Mux_Drv_DevGuide_v07 Page 21 of 36 2006-9-27

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4.2 Settings Stored in the Windows Registry

The WinMux2k driver parameters are located in the registry path

HKLM\System\CurrentControlSet\Enum\Root\winmux\000X\Device Parameters.

X is the number of the device instance.

All values listed below will be created during the installation of the WinMux2k driver. The settings are provided

by the winmux2k.inf file. If you want to write your own preferences to the Registry you can edit the inf file before

installing the driver.

Table 6: Registry values

Value Data (Example) Properties

BasePort COM1 The physical serial port that connects the module to the PC.

BaudRate 115200 Baud rate used on the physical port.

BaudRateString AT+IPR=115200 This string is used to set the module to the given baud rate.

Note: This string must contain the same value as the

BaudRate value.

If you select a higher baud rate be sure it is supported by the

module. For details see [3].

ModemInit AT

AT&S0

AT\Q3

AT+ICF=3

AT+CMUX=0

This multi-string value contains several AT commands

which are used to switch the module to multiplexer mode.

Possible ERROR codes resulting from unsupported com-

mands are ignored by the WinMux2k initialization sequence.

RequestTimeout 2000 Timeout value used only during the initialization of the mod-

ule. 2000 is the maximum number of milliseconds the mod-

ule can take to respond to AT requests.

VirtPort1 COM10 Name of the first virtual port. Each virtual port must have a

unique name. Otherwise the driver will fail to start up.

VirtPort2 COM11 See VirtPort1

VirtPort3 COM12 See VirtPort1

VirtualChannels 3 Number of Virtual Channels visible as COM ports. The

WinMux2k driver supports up to 3 virtual ports. The number

of VirtualChannels must be less or equal to TotalChannels.

TotalChannels 3 If the number of TotalChannels is greater than VirtualChan-

nels and no VirtPortX value for additional channels is

defined, these additional ports are not visible as COM ports.

They can be accessed by the link named

SERMUX_CONTROL_PREFIX defined in sermux_i.h. This

allows to hide virtual ports to the user. Each physical port

can have one hidden port.

WakeUpTime 4000 Timeout during module initialization. The timeout takes

effect only when the driver tries to restart the module from

Power Down or to wake it up from SLEEP mode

AT+CFUN=0. The time is given in milliseconds.

PowerCmdPort 3 This virtual channel is used to send the power down com-

mands to the module. The data state on this channel may be

disturbed during power down and cannot be reconstructed

by the driver.

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