CanSetMonitorMode

Function

Set monitor mode.

Format

Ret = CanSetMonitorMode ( Id , ChannelNo , MonitorMode )

Parameters

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

ChannelNo [ C: unsigned short ] [ Python: ctypes.c_ushort ]
Specify the channel number.

MonitorMode [ C: unsigned short ] [ Python: ctypes.c_ushort ]
Specify monitor mode.

Definition	Value [Dec]	Description
CCAN_MONITOR_OFF	0	Monitor mode OFF
CCAN_MONITOR_ON	1	Monitor mode ON

Return Value

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

Definition	Value [Dec]	Description
CAN_ERR_SUCCESS	0	Normality completion
CAN_ERR_DLL_INVALID_ID	10001	Invalid ID specified.
CAN_ERR_DLL_CALL_DRIVER	10002	Driver can't be called (Failed in the ioctl).
CAN_ERR_SYS_MONITOR_MODE	20100	Monitor mode is outside the settable range.

The others (See also: Details of Error Code)

Initial Value

MotionMode = CCAN_MONITOR_OFF: Monitor mode OFF

Remarks

Set the monitor mode for each channel.
When monitor mode is set to ON, ACK is not returned when data is received via CAN communication, and data is monitored without affecting the line.

You can call this function during disconnecting from the CAN bus.
And also, you can not transmit by CAN/CAN FD communication during Monitor mode is ON

Example

Set the monitor mode ON for ChannelNo = 1.

C	long Ret; Ret = CanSetMonitorMode( Id , 1 , CCAN_MONITOR_ON );
Python	Ret = ctypes.c_long() Ret.value = ccan.CanSetMonitorMode ( Id , 1 , CCAN_MONITOR_ON )