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Simple PCIe FMC carrier SPEC
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Simple PCIe FMC carrier SPEC
Commits
f2a92ca6
Commit
f2a92ca6
authored
Jul 17, 2019
by
Tristan Gingold
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spec template: add comments
parent
2a176b30
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spec_template_wr.vhd
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hdl/rtl/spec_template_wr.vhd
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f2a92ca6
...
@@ -502,7 +502,7 @@ begin -- architecture top
...
@@ -502,7 +502,7 @@ begin -- architecture top
and
gn_wb_out
.
stb
=
'1'
and
gn_wb_out
.
stb
=
'1'
then
then
-- New transaction.
-- New transaction.
-- Stall
-- Stall
so that there is no new requests from the master.
gn_wb_in
.
stall
<=
'1'
;
gn_wb_in
.
stall
<=
'1'
;
can_stall
:
=
'1'
;
can_stall
:
=
'1'
;
if
gn_wb_out
.
adr
(
31
downto
13
)
=
(
31
downto
13
=>
'0'
)
then
if
gn_wb_out
.
adr
(
31
downto
13
)
=
(
31
downto
13
=>
'0'
)
then
...
@@ -516,6 +516,7 @@ begin -- architecture top
...
@@ -516,6 +516,7 @@ begin -- architecture top
end
if
;
end
if
;
when
S_CARRIER
=>
when
S_CARRIER
=>
-- Pass from carrier.
-- Pass from carrier.
-- Maintain stb as long as the carrier stalls.
carrier_wb_in
.
stb
<=
carrier_wb_out
.
stall
and
can_stall
;
carrier_wb_in
.
stb
<=
carrier_wb_out
.
stall
and
can_stall
;
can_stall
:
=
can_stall
and
carrier_wb_out
.
stall
;
can_stall
:
=
can_stall
and
carrier_wb_out
.
stall
;
gn_wb_in
<=
carrier_wb_out
;
gn_wb_in
<=
carrier_wb_out
;
...
...
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