ZmGetMaxChannels

Function

Retrieve the maximum number of channels for the device.

Format

Ret = ZmGetMaxChannels ( Id , MaxChannels )

Parameters

Id [ C, C++: short ] [ Python: ctypes.c_short ]
Specify the device ID retrieved from ZmInit.

MaxChannels [ C, C++: short * ] [ Python: ctypes.POINTER(ctypes.c_short) ]
Specify the variable address for storing the maximum number of the device channels.

Return Value

Ret [ C, C++: long ] [ Python: ctypes.c_long ]

Definition	Value [Dec]	Description
ZM_ERR_SUCCESS	0	Normality completion
ZM_ERR_DLL_INVALID_ID	10001	Invalid ID was specified.
ZM_ERR_DLL_CALL_DRIVER	10002	Driver can't be called (Failed in the ioctl).
ZM_ERR_DLL_BUFF_ADDRESS	10100	Invalid data buffer address.

The others (See also: Details of Error Code)

Initial Value

None

Remarks

Retrieve the number of channels for the device.

Example

Retrieve the number of channels for the device.

C, C++

long Ret;
short MaxChannels;
Ret = ZmGetMaxChannels ( Id , &MaxChannels );

Python

Ret = ctypes.c_long()
ChannelNum = ctypes.c_short()
Ret.value = czm.ZmGetMaxChannels ( Id , ctypes.byref(MaxChannels) )