CanSigIoCtl()

This function performs a special action on the opened device. The function code defines what the caller want to do.

  CPU_INT16S CanSigIoCtl(CPU_INT16S sigId,
  CPU_INT16U func,
  void *argp);

Parameter	Meaning
`sigId`	Unique signal identifier
`func`	The functioncode
`argp`	Pointer to argument, specific to the function code

Function Code	Meaning
`CANSIG_GET_WIDTH`	Get the argument pointer width (`CPU_INT08U *`) and set the content to the signal width.
`CANSIG_GET_STATUS`	Get the argument pointer status (`CPU_INT08U *`) and set the content to the signal status.
`CANSIG_GET_TIMESTAMP`	Get the argument pointer timestamp (`CPU_INT32U *`) and set the content to the signal timestamp.
`CANSIG_GET_TIME_SINCE_UPDATE`	Get the argument pointer timestamp (`CPU_INT32U *`) and set the content to the difference between actual time and signal timestamp.
`CANSIG_DISABLE_TIMESTAMP`	Timestamping can be disabled to improve performance. The argument pointer is unused.
`CANSIG_ENABLE_TIMESTAMP`	Enables timestamping. The argument pointer is unused.
`CANSIG_SET_TIMESTAMP`	The timestamp of a signal will be set to the content of the argument pointer (`CPU_INT32U*`).
`CANSIG_SET_WRITE_PROTECTION`	Sets a write protections for a dedicated signal. When set, CanSigWrite-function will have no effect on that signal. The argument pointer (`CPU_INT08U*`) must be set to `CANSIG_PROT_RO` to enable write protection or 0 to disable write protection.
`CANSIG_GET_WRITE_PROTECTION`	Get the argument pointer write protection (`CPU_INT08U*`) and set the content to write protection status (`CANSIG_PROT_RO` or 0).

The IoCtl-functions concerning timestamp are omitted if CANSIG_STATIC_CONFIG is set to 1.

One of the following error codes is returned: CAN_ERR_NONE, CAN_ERR_SIGID, CAN_ERR_NULLPTR, CAN_ERR_NULLSIGCFG or CAN_ERR_IOCTRLFUNC.