CanGetCanFdTiming

Function

Get the CAN FD communication timing settings.

Format

Ret = CanGetCanFdTiming ( Id , ChannelNo , ArbBitrate , ArbTSeg1 , ArbSJW , ArbTSeg2 , DataBitrate , DataSeg1 , DataSJW , DataSeg2 )

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.

ArbBitrate [ C: unsigned int * ] [ Python: ctypes.POINTER(ctypes.c_uint) ]
Get the arbitration bitrate. The unit is bps. (bit per second)

ArbTSeg1 [ C: unsigned short * ] [ Python: ctypes.POINTER(ctypes.c_ushort) ]
Get the arbitration time segment 1. The unit is TQ.

ArbSJW [ C: unsigned short * ] [ Python: ctypes.POINTER(ctypes.c_ushort) ]
Get the arbitration SJW. The unit is TQ.

ArbTSeg2 [ C: unsigned short * ] [ Python: ctypes.POINTER(ctypes.c_ushort) ]
Get the arbitration time segment 2. The unit is TQ.

DataBitrate [ C: unsigned int * ] [ Python: ctypes.POINTER(ctypes.c_uint) ]
Get the data bitrate. The unit is bps. (bit per second)

DataTSeg1 [ C: unsigned short * ] [ Python: ctypes.POINTER(ctypes.c_ushort) ]
Get the data time segment 1. The unit is TQ.

DataSJW [ C: unsigned short * ] [ Python: ctypes.POINTER(ctypes.c_ushort) ]
Get the data SJW. The unit is TQ.

DataTSeg2 [ C: unsigned short * ] [ Python: ctypes.POINTER(ctypes.c_ushort) ]
Get the data time segment 2. The unit is TQ.

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_DLL_BUFF_ADDRESS	10100	Invalid data buffer address.
CAN_ERR_SYS_CH_NO	20101	Channel number is outside the settable range

The others (See also: Details of Error Code)

Initial Value

None

Remarks

Get the CAN FD communication timing settings.
It can be used even when connected to CAN bus.

For details, please refer to Difference between CAN 2.0B Communication and CAN FD Communication and CAN communication transmission time.

Example

Get ArbBitrate, ArbTSeg1, ArbSJW, ArbTSeg2, DataBitrate, DataTSeg1, DataSJW, DataTSeg2 set to ChannelNo = 1.

long Ret;

unsigned int ArbBitrate;

unsigned short ArbTSeg1;

unsigned short ArbSJW;

unsigned short ArbTSeg2;

unsigned int DataBitrate;

unsigned short DataTSeg1;

unsigned short DataSJW;

unsigned short DataTSeg2;
Ret = CanGetCanFdTiming ( Id , 1 , &ArbBitrate , &ArbTSeg1 , &ArbSJW , &ArbTSeg2 , &DataBitrate , &DataTSeg1 , &DataSJW , &DataTSeg2 );

Python

Ret = ctypes.c_long()

ArbBitrate = ctypes.ctypes.c_uint()

ArbTSeg1 = ctypes.c_ushort()

ArbSJW = ctypes.c_ushort()

ArbTSeg2 = ctypes.c_ushort()

DataBitrate = ctypes.ctypes.c_uint()

DataTSeg1 = ctypes.c_ushort()

DataSJW = ctypes.c_ushort()

DataTSeg2 = ctypes.c_ushort()

Ret.value = ccan.CanGetCanFdTiming ( Id , 1 , ctypes.byref(ArbBitrate) , ctypes.byref(ArbTSeg1) , ctypes.byref(ArbSJW) , ctypes.byref(ArbTSeg2) , ctypes.byref(DataBitrate) , ctypes.byref(DataTSeg1) , ctypes.byref(DataSJW) , ctypes.byref(DataTSeg2) )