Occasional Contributor
Occasional ContributorHi, I tried implementing a word aligner by sending a pattern (0xF0000000). because of the bitslip, the RX then will receive a different value (e.g 0x003c0000).
But then it turns out that the bitslip is not constant throughout the transfer.
To prove that there's are bitslips happening, I took a screenshot of the receiving part. This time, the prbs_din is sync using resync.
The expected sequence of the 5 first word are: 0x55555555, 0x5fffffff, 0x2a000000, 0x17a00000, 0x0aaa0000.
But if you see the screenshot, you can see that the words are getting mixed, for example
0xfd555555 is parts of the first and second correct sequence. thus showing a bit slip.
Although the prbs check is shows no error, the data itself is not correct.
To reproduce this error, you can compile hssi_prbs example with the attached prbs_top.v and hssi.stp within src.zip.
Is there any pattern to this bitslip? How do I fix this bitslips?
I really need this to work, my goal is just simply moving data from 1 fpga to another.
Please advise a way to correct the received data.
