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-- Copyright (c) 2017 Nuand LLC
--
-- Permission is hereby granted, free of charge, to any person obtaining a copy
-- of this software and associated documentation files (the "Software"), to deal
-- in the Software without restriction, including without limitation the rights
-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-- copies of the Software, and to permit persons to whom the Software 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 Software.
--
-- THE SOFTWARE 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 COPYRIGHT HOLDERS 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 SOFTWARE OR THE USE OR OTHER DEALINGS IN
-- THE SOFTWARE.
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
package fifo_readwrite_p is
type sample_control_t is record
enable : std_logic;
data_req : std_logic;
end record;
type sample_controls_t is array( natural range <> ) of sample_control_t;
type sample_stream_t is record
data_i : signed(15 downto 0);
data_q : signed(15 downto 0);
data_v : std_logic;
end record;
type sample_streams_t is array( natural range <> ) of sample_stream_t;
type packet_control_t is record
pkt_core_id : std_logic_vector(7 downto 0);
pkt_flags : std_logic_vector(7 downto 0);
pkt_sop : std_logic;
pkt_eop : std_logic;
data : std_logic_vector(31 downto 0);
data_valid : std_logic;
end record;
type packet_controls_t is array( natural range <> ) of packet_control_t;
constant SAMPLE_CONTROL_ENABLE : sample_control_t;
constant SAMPLE_CONTROL_DISABLE : sample_control_t;
constant PACKET_CONTROL_DEFAULT : packet_control_t;
constant ZERO_SAMPLE : sample_stream_t;
-- Count how many channels are enabled
function count_enabled_channels( x : sample_controls_t ) return natural;
end package;
package body fifo_readwrite_p is
constant SAMPLE_CONTROL_ENABLE : sample_control_t := (
enable => '1',
data_req => '1'
);
constant SAMPLE_CONTROL_DISABLE : sample_control_t := (
enable => '0',
data_req => '0'
);
constant PACKET_CONTROL_DEFAULT : packet_control_t := (
pkt_core_id => (others => '0'),
pkt_flags => (others => '0'),
pkt_sop => '0',
pkt_eop => '0',
data => (others => '0'),
data_valid => '0'
);
constant ZERO_SAMPLE : sample_stream_t := (
data_i => (others => '0'),
data_q => (others => '0'),
data_v => '0'
);
-- Count how many channels are enabled
function count_enabled_channels( x : sample_controls_t ) return natural is
variable rv : natural := 0;
begin
rv := 0;
for i in x'range loop
if( x(i).enable = '1' ) then
rv := rv + 1;
end if;
end loop;
return rv;
end function;
end package body;
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