Early expiry of the Simplex timer in the Simplex-TX core results in no CHANNEL_UP assertion in the Simplex-RX core.
This is observed in Artix-7 GTP and Virtex-7 GTH based cores.
Increase the simplex timer (simplex_timer_r) from 16-bit to 18-bit and increase the other timeout values given below:
These changes must be applied in <component name>_core.v[hd] of the Simplex-TX IP.
This issue will be fixed in the next VIVADO release (v10.2) of the core.
1/15/2014 - Initial release