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VME64x core
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VME64x core
Commits
cc95254f
Commit
cc95254f
authored
Nov 30, 2017
by
Tristan Gingold
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Use 2 synchronizers for ds.
parent
2f426d19
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13 additions
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4 deletions
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-4
xvme64x_core.vhd
hdl/rtl/xvme64x_core.vhd
+13
-4
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hdl/rtl/xvme64x_core.vhd
View file @
cc95254f
...
...
@@ -312,12 +312,21 @@ begin
rst_n_a_i
=>
rst_n_i
,
d_i
(
0
)
=>
vme_i
.
write_n
,
q_o
(
0
)
=>
s_vme_write_n
);
inst_vme_ds_resync
:
entity
work
.
gc_sync_register
generic
map
(
g_width
=>
2
)
-- The two bits of DS are synchronized by the vme_bus FSM. Instantiate two
-- synchronizer to make clear that they should be considered as independant
-- signals until they are handled by the FSM.
inst_vme_ds0_resync
:
entity
work
.
gc_sync_register
generic
map
(
g_width
=>
1
)
port
map
(
clk_i
=>
clk_i
,
rst_n_a_i
=>
rst_n_i
,
d_i
(
0
)
=>
vme_i
.
ds_n
(
0
),
q_o
(
0
)
=>
s_vme_ds_n
(
0
));
inst_vme_ds1_resync
:
entity
work
.
gc_sync_register
generic
map
(
g_width
=>
1
)
port
map
(
clk_i
=>
clk_i
,
rst_n_a_i
=>
rst_n_i
,
d_i
=>
vme_i
.
ds_n
,
q_o
=>
s_vme_ds_n
);
d_i
(
0
)
=>
vme_i
.
ds_n
(
1
)
,
q_o
(
0
)
=>
s_vme_ds_n
(
1
)
);
inst_vme_iack_resync
:
entity
work
.
gc_sync_register
generic
map
(
g_width
=>
1
)
port
map
(
clk_i
=>
clk_i
,
...
...
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