[etherlab-users] Problem with reading reference clock time: Slave synchronization datagram was not received.

[Mohsen Alizadeh Noghani]

Hello everyone.
Following my previous email, I have tried reading the 32-bit time of the
reference clock by *ecrt_master_reference_clock_time* in various versions
of the library. Here are the results of calling this function in userspace
code:

- 1.5.2 (*Failed to get reference clock time: Input/output error*)
- stable-1.5 branch of SourceForge (*Failed to get reference clock time:
Input/output error*)
- default branch of SourceForge. (Returns -5: *Slave synchronization
datagram was not received*)
- default branch of SourceForge + gavinl's patchset (Returns -5: *Slave
synchronization datagram was not received*).


- As expected, *ecrt_master_64_bit_reference_clock_time* (in the patched
version) also returns -5 (*Slave synchronization datagram was not received*
).
- By reading the register "0x92c" on the reference slave, I can verify that
the DC mechanism is working as it should.
So what is causing the error *Slave synchronization datagram was not
received*?
Best,
Mohsen

[Mohsen Alizadeh Noghani]

Calling the function after *ert_master_receive* and before *ecrt_domain_queue()
*fixed the issue. (At the moment, I have only tested it on stable-1.5).
Best,
Mohsen

On Fri, Oct 26, 2018 at 11:29 AM Mohsen Alizadeh Noghani <

Post by Mohsen Alizadeh Noghani
Hello everyone.
Following my previous email, I have tried reading the 32-bit time of the
reference clock by *ecrt_master_reference_clock_time* in various versions
of the library. Here are the results of calling this function in userspace
- 1.5.2 (*Failed to get reference clock time: Input/output error*)
- stable-1.5 branch of SourceForge (*Failed to get reference clock
time: Input/output error*)
- default branch of SourceForge. (Returns -5: *Slave synchronization
datagram was not received*)
- default branch of SourceForge + gavinl's patchset (Returns -5: *Slave
synchronization datagram was not received*).
- As expected, *ecrt_master_64_bit_reference_clock_time* (in the patched
version) also returns -5 (*Slave synchronization datagram was not received*
).
- By reading the register "0x92c" on the reference slave, I can verify
that the DC mechanism is working as it should.
So what is causing the error *Slave synchronization datagram was not
received*?
Best,
Mohsen