DCMD_PTPD_DELAYSM
QNX SDP8.0Devctl and Ioctl CommandsDeveloper
Get the slave-to-master delay
Synopsis:
#include <dcmd_ptpd.h>
#define DCMD_PTPD_DELAYSM __DIOF(_DCMD_NET, 11, MyTimeInternal )
Arguments to devctl():
| Argument | Value |
|---|---|
| filedes | A file descriptor that you obtained by opening /dev/ptpd |
| dcmd | DCMD_PTPD_DELAYSM |
| dev_data_ptr | A pointer to a MyTimeInternal structure |
| n_bytes | sizeof(MyTimeInternal) |
| dev_info_ptr | NULL |
Description:
The DCMD_PTPD_DELAYSM command gets the network latency in the direction from the slave to the master for the Precision Time Protocol.
Note:
To use this command, you must specify the -K option when you start
ptpd2.
Input:
None
Output:
A filled-in MyTimeInternal structure, which is defined in <dcmd_ptpd.h> as follows:
typedef struct {
uint32_t seconds;
uint32_t nanoseconds;
} MyTimeInternal;
Example:
See also:
DCMD_PTPD_DELAYMS, DCMD_PTPD_GET_PDELAY_INTERVAL, DCMD_PTPD_GET_TAI_UTC_OFFSET, DCMD_PTPD_GET_TIME, DCMD_PTPD_INFO, DCMD_PTPD_SEND_SIGNALING_MSG, DCMD_PTPD_SET_PDELAY_INTERVAL, DCMD_PTPD_STATUS
devctl() in the QNX OS C Library Reference
ptpd2 in the Utilities Reference
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