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CTU CAN FD IP Core
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canbus
CTU CAN FD IP Core
Commits
8dcba755
Commit
8dcba755
authored
Dec 30, 2018
by
Ille, Ondrej, Ing.
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Plain Diff
Modelsim workaround.
parent
d049f9da
Changes
3
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3 changed files
with
17 additions
and
13 deletions
+17
-13
src/lib/can_components.vhd
src/lib/can_components.vhd
+1
-1
src/rx_buffer/rx_buffer.vhd
src/rx_buffer/rx_buffer.vhd
+1
-1
src/rx_buffer/rx_buffer_pointers.vhd
src/rx_buffer/rx_buffer_pointers.vhd
+15
-11
No files found.
src/lib/can_components.vhd
View file @
8dcba755
...
...
@@ -326,7 +326,7 @@ package can_components is
signal
write_pointer
:
out
natural
range
0
to
buff_size
-
1
;
signal
write_pointer_raw
:
out
natural
range
0
to
buff_size
-
1
;
signal
write_pointer_extra_ts
:
out
natural
range
0
to
buff_size
-
1
;
signal
rx_mem_free_int
:
out
natural
range
0
to
buff_size
signal
rx_mem_free_int
:
out
natural
range
-1
to
buff_size
+
1
);
end
component
;
...
...
src/rx_buffer/rx_buffer.vhd
View file @
8dcba755
...
...
@@ -334,7 +334,7 @@ architecture rtl of rx_buffer is
signal
memory_write_data
:
std_logic_vector
(
31
downto
0
);
-- Number of free memory words available to SW after frame was committed.
signal
rx_mem_free_int
:
natural
range
0
to
buff_size
;
signal
rx_mem_free_int
:
natural
range
-1
to
buff_size
+
1
;
----------------------------------------------------------------------------
----------------------------------------------------------------------------
...
...
src/rx_buffer/rx_buffer_pointers.vhd
View file @
8dcba755
...
...
@@ -134,7 +134,7 @@ entity rx_buffer_pointers is
-- Mem. free outputs
------------------------------------
-- Number of free memory words available for user
signal
rx_mem_free_int
:
out
natural
range
0
to
buff_size
signal
rx_mem_free_int
:
out
natural
range
-1
to
buff_size
+
1
);
end
entity
;
...
...
@@ -152,19 +152,19 @@ architecture rtl of rx_buffer_pointers is
signal
drv_erase_rx
:
std_logic
;
-- Raw value of number of free memory words.
signal
rx_mem_free_raw
:
natural
range
0
to
buff_size
;
signal
rx_mem_free_raw
:
natural
range
-1
to
buff_size
+
1
;
-- Number of free memory words calculated during frame storing before commit
-- combinationally incremented by 1.
signal
rx_mem_free_raw_inc_1
:
natural
range
0
to
buff_size
+
1
;
signal
rx_mem_free_raw_inc_1
:
natural
range
-1
to
buff_size
+
1
;
-- Number of free memory words calculated during frame storing before commit
-- combinationally decremented by 1.
signal
rx_mem_free_raw_dec_1
:
natural
range
-1
to
buff_size
;
signal
rx_mem_free_raw_dec_1
:
natural
range
-1
to
buff_size
+
1
;
-- Number of free memory words available to SW, combinationally icnremented
-- by 1.
signal
rx_mem_free_int_inc_1
:
natural
range
0
to
buff_size
+
1
;
signal
rx_mem_free_int_inc_1
:
natural
range
-1
to
buff_size
+
1
;
begin
...
...
@@ -331,10 +331,12 @@ begin
----------------------------------------------------------------------------
-- Calculating incremented value of free memory combinationally
----------------------------------------------------------------------------
rx_mem_free_int_inc_1
<=
rx_mem_free_int
+
1
;
rx_mem_free_raw_inc_1
<=
rx_mem_free_raw
+
1
;
rx_mem_free_raw_dec_1
<=
rx_mem_free_raw
-
1
;
mem_free_arith_proc
:
process
(
rx_mem_free_int
,
rx_mem_free_raw
)
begin
rx_mem_free_int_inc_1
<=
rx_mem_free_int
+
1
;
rx_mem_free_raw_inc_1
<=
rx_mem_free_raw
+
1
;
rx_mem_free_raw_dec_1
<=
rx_mem_free_raw
-
1
;
end
process
;
----------------------------------------------------------------------------
-- Calculation of Incremented Read Pointer combinationally. This is used
...
...
@@ -344,7 +346,9 @@ begin
-- clock cycle delay on "read_pointer" and thus allow bursts on read
-- from RX_DATA register!
----------------------------------------------------------------------------
read_pointer_inc_1
<=
(
read_pointer
+
1
)
mod
buff_size
;
read_pointer_inc_proc
:
process
(
read_pointer
)
begin
read_pointer_inc_1
<=
(
read_pointer
+
1
)
mod
buff_size
;
end
process
;
end
architecture
;
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