File: /__w/ctu-can-regression/ctu-can-regression/src/common_blocks/dff_arst_ce.vhd
0: --------------------------------------------------------------------------------
1: --
2: -- CTU CAN FD IP Core
3: -- Copyright (C) 2021-2023 Ondrej Ille
4: -- Copyright (C) 2023- Logic Design Services Ltd.s
5: --
6: -- Permission is hereby granted, free of charge, to any person obtaining a copy
7: -- of this VHDL component and associated documentation files (the "Component"),
8: -- to use, copy, modify, merge, publish, distribute the Component for
9: -- non-commercial purposes. Using the Component for commercial purposes is
10: -- forbidden unless previously agreed with Copyright holder.
11: --
12: -- The above copyright notice and this permission notice shall be included in
13: -- all copies or substantial portions of the Component.
14: --
15: -- THE COMPONENT IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16: -- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17: -- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18: -- AUTHORS OR COPYRIGHTHOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19: -- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20: -- FROM, OUT OF OR IN CONNECTION WITH THE COMPONENT OR THE USE OR OTHER DEALINGS
21: -- IN THE COMPONENT.
22: --
23: -- The CAN protocol is developed by Robert Bosch GmbH and protected by patents.
24: -- Anybody who wants to implement this IP core on silicon has to obtain a CAN
25: -- protocol license from Bosch.
26: --
27: -- -------------------------------------------------------------------------------
28: --
29: -- CTU CAN FD IP Core
30: -- Copyright (C) 2015-2020 MIT License
31: --
32: -- Authors:
33: -- Ondrej Ille <ondrej.ille@gmail.com>
34: -- Martin Jerabek <martin.jerabek01@gmail.com>
35: --
36: -- Project advisors:
37: -- Jiri Novak <jnovak@fel.cvut.cz>
38: -- Pavel Pisa <pisa@cmp.felk.cvut.cz>
39: --
40: -- Department of Measurement (http://meas.fel.cvut.cz/)
41: -- Faculty of Electrical Engineering (http://www.fel.cvut.cz)
42: -- Czech Technical University (http://www.cvut.cz/)
43: --
44: -- Permission is hereby granted, free of charge, to any person obtaining a copy
45: -- of this VHDL component and associated documentation files (the "Component"),
46: -- to deal in the Component without restriction, including without limitation
47: -- the rights to use, copy, modify, merge, publish, distribute, sublicense,
48: -- and/or sell copies of the Component, and to permit persons to whom the
49: -- Component is furnished to do so, subject to the following conditions:
50: --
51: -- The above copyright notice and this permission notice shall be included in
52: -- all copies or substantial portions of the Component.
53: --
54: -- THE COMPONENT IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
55: -- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
56: -- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
57: -- AUTHORS OR COPYRIGHTHOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
58: -- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
59: -- FROM, OUT OF OR IN CONNECTION WITH THE COMPONENT OR THE USE OR OTHER DEALINGS
60: -- IN THE COMPONENT.
61: --
62: -- The CAN protocol is developed by Robert Bosch GmbH and protected by patents.
63: -- Anybody who wants to implement this IP core on silicon has to obtain a CAN
64: -- protocol license from Bosch.
65: --
66: --------------------------------------------------------------------------------
67:
68: --------------------------------------------------------------------------------
69: -- Module:
70: -- Single Flip-flop with asynchronous reset and clock enable.
71: --------------------------------------------------------------------------------
72:
73: Library ieee;
74: use ieee.std_logic_1164.all;
75:
76: entity dff_arst_ce is
77: generic (
78: -- Reset polarity
79: G_RESET_POLARITY : std_logic;
80:
81: -- Reset value
82: G_RST_VAL : std_logic
83: );
84: port (
85: -- Asynchronous reset
86: arst : in std_logic;
87:
88: -- Clock
89: clk : in std_logic;
90:
91: -- Data input (D)
92: reg_d : in std_logic;
93:
94: -- Clock enable (CE)
95: ce : in std_logic;
96:
97: -- Data output (Q)
98: reg_q : out std_logic
99: );
100: end dff_arst_ce;
101:
102: architecture rtl of dff_arst_ce is
103: begin
104:
105: dff_proc : process (clk, arst)
106: begin
107: if (arst = G_RESET_POLARITY) then
108: reg_q <= G_RST_VAL;
109: elsif (rising_edge(clk)) then
110: if (ce = '1') then
111: reg_q <= reg_d;
112: end if;
113: end if;
114: end process;
115:
116: end rtl;