library/util_axis_fifo_asym: Fix room and level signals from FIFO ASYM #1920
+126
−19
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
LBFFilho
reviewed
Sep 17, 2025
caosjr
force-pushed
the
fix_fifo_asym_room_level
branch
from
0cb347f to
71dc96f
Compare
LBFFilho
reviewed
Sep 17, 2025
| .in_clk (m_axis_aclk), | ||
| .in_event (m_axis_ready & m_axis_valid), | ||
| .out_clk (s_axis_aclk), | ||
| .out_event (sdi_output_read_sync)); |
There was a problem hiding this comment.
sdi_output_read_sync I suggest renaming this
caosjr
force-pushed
the
fix_fifo_asym_room_level
branch
from
71dc96f to
d5a3007
Compare
Fix a bug where m_axis_valid waits on m_axis_ready to be asserted a few times in order to skip over data for which tkeep was all zeroes. This was a violation of the AXI Streaming protocol. Signed-off-by: Laez Barbosa <laez.barbosa@analog.com>
Fix tvalid low when tlast is present. Before this commit, util_axis_fifo would suppress all transfers with tkeep=0, even if tlast was asserted. This commit makes it so transfers with tlast asserted are preserved. The AXI-Streaming spec allows us to suppress transfers for which all tkeep bits are 0 (all bytes are null bytes), but only in the case when tlast=0 as well. Transfers where tlast is asserted can't be suppressed even when all bytes are null. Signed-off-by: Laez Barbosa <laez.barbosa@analog.com>
ROOM and LEVEL signals are incorrect when there is an imbalance between the size of the input and output and TKEEP_EN == 1. This commit fixes this issue by inserting two counters, which are better for timing than performing a sum reduce ROOM and LEVEL of the internal symmetrical FIFOs Signed-off-by: Carlos Souza <carlos.souza@analog.com>
caosjr
force-pushed
the
fix_fifo_asym_room_level
branch
from
d5a3007 to
b4e690a
Compare
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
ROOM and LEVEL signals are incorrect when there is an imbalance between the size of the input and output and TKEEP_EN == 1. This is fixed by inserting two counters, which are better for timing than performing a sum reduce ROOM and LEVEL of the internal symmetrical FIFOs.
This PR has to be merged after #1914
PR Type
PR Checklist