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sync: Set ASYNC_REG in HDL instead of TCL

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Signed-off-by: Alex Forencich <alex@alexforencich.com>
This commit is contained in:
Alex Forencich
2025-04-28 20:03:38 -07:00
parent 577c572c5d
commit 3401e069d1
4 changed files with 2 additions and 4 deletions
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2
rtl/sync/taxi_sync_reset.sv
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@@ -28,7 +28,7 @@ module taxi_sync_reset #
output wire logic out output wire logic out
); );
(* srl_style = "register" *) (* async_reg="true", srl_style="register", shreg_extract="no" *)
logic [N-1:0] sync_reg = '1; logic [N-1:0] sync_reg = '1;
assign out = sync_reg[N-1]; assign out = sync_reg[N-1];

2
rtl/sync/taxi_sync_signal.sv
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@@ -29,7 +29,7 @@ module taxi_sync_signal #(
output wire logic [WIDTH-1:0] out output wire logic [WIDTH-1:0] out
); );
(* srl_style = "register" *) (* async_reg="true", srl_style="register", shreg_extract="no" *)
logic [WIDTH-1:0] sync_reg[N-1:0]; logic [WIDTH-1:0] sync_reg[N-1:0];
assign out = sync_reg[N-1]; assign out = sync_reg[N-1];

1
syn/vivado/taxi_sync_reset.tcl
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@@ -14,6 +14,5 @@ foreach inst [get_cells -hier -filter {(ORIG_REF_NAME == taxi_sync_reset || REF_
# reset synchronization # reset synchronization
set reset_ffs [get_cells -quiet -hier "sync_reg_reg[*]" -filter "PARENT == $inst"] set reset_ffs [get_cells -quiet -hier "sync_reg_reg[*]" -filter "PARENT == $inst"]
set_property ASYNC_REG TRUE $reset_ffs
set_false_path -to [get_pins -of_objects $reset_ffs -filter {IS_PRESET || IS_RESET}] set_false_path -to [get_pins -of_objects $reset_ffs -filter {IS_PRESET || IS_RESET}]
} }

1
syn/vivado/taxi_sync_signal.tcl
View File

@@ -11,6 +11,5 @@
foreach inst [get_cells -hier -filter {(ORIG_REF_NAME == taxi_sync_signal || REF_NAME == taxi_sync_signal)}] { foreach inst [get_cells -hier -filter {(ORIG_REF_NAME == taxi_sync_signal || REF_NAME == taxi_sync_signal)}] {
puts "Inserting timing constraints for taxi_sync_signal instance $inst" puts "Inserting timing constraints for taxi_sync_signal instance $inst"
set_property ASYNC_REG TRUE [get_cells -hier "sync_reg_reg[*][*]" -filter "PARENT == $inst"]
set_false_path -to [get_cells -hier "sync_reg_reg[0][*]" -filter "PARENT == $inst"] set_false_path -to [get_cells -hier "sync_reg_reg[0][*]" -filter "PARENT == $inst"]
} }