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CTU CAN FD IP Core
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canbus
CTU CAN FD IP Core
Commits
0b4beb24
Commit
0b4beb24
authored
Sep 09, 2018
by
Ille, Ondrej, Ing.
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Added draft of data overrun clear test.
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d09c3e26
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test/feature/data_overrun_clear_feature_tb.vhd
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0b4beb24
--------------------------------------------------------------------------------
--
-- CTU CAN FD IP Core
-- Copyright (C) 2015-2018 Ondrej Ille <ondrej.ille@gmail.com>
--
-- Project advisors and co-authors:
-- Jiri Novak <jnovak@fel.cvut.cz>
-- Pavel Pisa <pisa@cmp.felk.cvut.cz>
-- Martin Jerabek <jerabma7@fel.cvut.cz>
-- Department of Measurement (http://meas.fel.cvut.cz/)
-- Faculty of Electrical Engineering (http://www.fel.cvut.cz)
-- Czech Technical University (http://www.cvut.cz/)
--
-- Permission is hereby granted, free of charge, to any person obtaining a copy
-- of this VHDL component and associated documentation files (the "Component"),
-- to deal in the Component without restriction, including without limitation
-- the rights to use, copy, modify, merge, publish, distribute, sublicense,
-- and/or sell copies of the Component, and to permit persons to whom the
-- Component is furnished to do so, subject to the following conditions:
--
-- The above copyright notice and this permission notice shall be included in
-- all copies or substantial portions of the Component.
--
-- THE COMPONENT IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-- AUTHORS OR COPYRIGHTHOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-- FROM, OUT OF OR IN CONNECTION WITH THE COMPONENT OR THE USE OR OTHER DEALINGS
-- IN THE COMPONENT.
--
-- The CAN protocol is developed by Robert Bosch GmbH and protected by patents.
-- Anybody who wants to implement this IP core on silicon has to obtain a CAN
-- protocol license from Bosch.
--
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- Purpose:
-- This test verifies if two consecutive write (without gap cycle), first
-- clearing overrun flag, second clearing overrun interrupt, might malfunction
-- due to two clock cycle delay on clearing overrun (which is caused by
-- pipeline architecture).
--
-- Test sequence:
-- 1. Configure Node 1 to capture data overrun interrupts.
-- 2. Release Receie Buffer of Node 1.
-- 3. Generate frame and start transmission by Node 2.
-- 4. Upon the end of transmission, check if Data overrun flag is set
-- on Node 1. If no, return to point 3.
-- 4. Read data overrun interrupt status and make sure it is set.
-- 5. Clear data overrun flag.
-- 6. Clear interrupt status of Data Overrun. Make sure these two conse-
-- cutive write cycles have only one clock cycle gap (no waits in
-- between)!
-- 7. Check if overrun interrupt was cleared by reading interrupt status
-- again!
--------------------------------------------------------------------------------
-- Revision History:
--
-- 9.9.2018 Created file
--------------------------------------------------------------------------------
Library
ieee
;
USE
IEEE
.
std_logic_1164
.
all
;
USE
IEEE
.
numeric_std
.
ALL
;
USE
ieee
.
math_real
.
ALL
;
use
work
.
CANconstants
.
all
;
USE
work
.
CANtestLib
.
All
;
USE
work
.
randomLib
.
All
;
use
work
.
pkg_feature_exec_dispath
.
all
;
use
work
.
CAN_FD_register_map
.
all
;
package
data_overrun_clear_feature
is
procedure
data_overrun_clear_feature_exec
(
variable
o
:
out
feature_outputs_t
;
signal
so
:
out
feature_signal_outputs_t
;
signal
rand_ctr
:
inout
natural
range
0
to
RAND_POOL_SIZE
;
signal
iout
:
in
instance_outputs_arr_t
;
signal
mem_bus
:
inout
mem_bus_arr_t
;
signal
bus_level
:
in
std_logic
);
end
package
;
package
body
data_overrun_clear_feature
is
procedure
data_overrun_clear_feature_exec
(
variable
o
:
out
feature_outputs_t
;
signal
so
:
out
feature_signal_outputs_t
;
signal
rand_ctr
:
inout
natural
range
0
to
RAND_POOL_SIZE
;
signal
iout
:
in
instance_outputs_arr_t
;
signal
mem_bus
:
inout
mem_bus_arr_t
;
signal
bus_level
:
in
std_logic
)
is
variable
r_data
:
std_logic_vector
(
31
downto
0
)
:
=
(
OTHERS
=>
'0'
);
variable
CAN_frame
:
SW_CAN_frame_type
;
variable
frame_sent
:
boolean
:
=
false
;
variable
ID_1
:
natural
:
=
1
;
variable
ID_2
:
natural
:
=
2
;
variable
interrupts
:
SW_interrupts
:
=
(
false
,
false
,
false
,
false
,
false
,
false
,
false
,
false
,
false
,
false
,
false
,
false
);
variable
command
:
SW_command
:
=
(
false
,
false
,
false
);
variable
status
:
SW_status
;
begin
o
.
outcome
:
=
true
;
------------------------------------------------------------------------
-- Set Node 1 to capture Data overrun interrupts, unmask it too!
------------------------------------------------------------------------
interrupts
.
data_overrun_int
:
=
true
;
write_int_enable
(
interrupts
,
ID_1
,
mem_bus
(
1
));
interrupts
.
data_overrun_int
:
=
false
;
write_int_mask
(
interrupts
,
ID_1
,
mem_bus
(
1
));
------------------------------------------------------------------------
-- Release RX Buffer of Node 1
------------------------------------------------------------------------
command
.
release_rec_buffer
:
=
true
;
give_controller_command
(
command
,
ID_1
,
mem_bus
(
1
));
command
.
release_rec_buffer
:
=
false
;
------------------------------------------------------------------------
-- Generate CAN frame and send it until data Overrun occurs on Node 1
------------------------------------------------------------------------
CAN_generate_frame
(
rand_ctr
,
CAN_frame
);
while
(
true
)
loop
CAN_send_frame
(
CAN_frame
,
1
,
ID_2
,
mem_bus
(
2
),
frame_sent
);
CAN_wait_frame_sent
(
ID_1
,
mem_bus
(
1
));
get_controller_status
(
status
,
ID_1
,
mem_bus
(
1
));
if
(
status
.
data_overrun
)
then
report
"Overrun Flag Detected!"
;
exit
;
end
if
;
end
loop
;
------------------------------------------------------------------------
-- Check Interrupt Status on Data Overrun!
------------------------------------------------------------------------
read_int_status
(
interrupts
,
ID_1
,
mem_bus
(
1
));
if
(
not
interrupts
.
data_overrun_int
)
then
report
"Data overrun Interrupt not captured as expected!"
severity
error
;
end
if
;
------------------------------------------------------------------------
-- Clear data overrun flag and clear data overrun interrupt!
------------------------------------------------------------------------
command
.
clear_data_overrun
:
=
true
;
give_controller_command
(
command
,
ID_1
,
mem_bus
(
1
));
interrupts
.
data_overrun_int
:
=
true
;
clear_int_status
(
interrupts
,
ID_1
,
mem_bus
(
1
));
------------------------------------------------------------------------
-- Read interrupt status and check data overrun was cleared!
------------------------------------------------------------------------
read_int_status
(
interrupts
,
ID_1
,
mem_bus
(
1
));
if
(
interrupts
.
data_overrun_int
)
then
report
"Data overrun Interrupt was not cleared!"
severity
error
;
end
if
;
end
procedure
;
end
package
body
;
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