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vhdl: move ws2812 driver to splink module

This commit is contained in:
Xiretza 2022-06-05 16:42:26 +02:00
parent 94ff182aec
commit 57e6daedcc
2 changed files with 37 additions and 57 deletions
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47
vhdl/arty_a7.vhdl
View File

@ -16,8 +16,8 @@ entity arty_a7 is
-- Pmod connectors - A+D standard, B+C high-speed.
-- Defined as inputs by default for safety, change
-- when necessary
pmod_a : in std_logic_vector(7 downto 0);
pmod_b : in std_logic_vector(7 downto 0);
pmod_a : out std_logic_vector(7 downto 0);
pmod_b : out std_logic_vector(7 downto 0);
pmod_c : in std_logic_vector(7 downto 0);
pmod_d : out std_logic_vector(7 downto 0);
@ -46,7 +46,7 @@ entity arty_a7 is
end arty_a7;
architecture a of arty_a7 is
constant NUM_DRIVERS: positive := 16;
constant NUM_DRIVERS: positive := 24;
signal drivers: std_logic_vector(NUM_DRIVERS-1 downto 0);
component liteeth_core is
@ -180,7 +180,7 @@ architecture a of arty_a7 is
signal sys_reset : std_logic;
begin
--leds_simple <= (others => '0');
leds_simple <= (others => '0');
led0 <= (others => '0');
led1 <= (others => '0');
led2 <= (others => '0');
@ -191,8 +191,6 @@ begin
ck_dig_l <= (others => 'Z');
ck_dig_h <= (others => 'Z');
leds_simple <= drivers(3 downto 0);
liteeth_inst: liteeth_core port map (
sys_clock => clk_sys,
sys_reset => sys_reset,
@ -284,40 +282,9 @@ begin
sys_reset <= not pll_locked or not n_reset;
ws2812_inst: entity work.ws2812
generic map (
NUM_LEDS => 20,
COLOR_ORDER => "GRB",
T_CLK => 12.5 ns,
T0H => 0.35 us,
T0L => 0.8 us,
T1H => 0.7 us,
T1L => 0.6 us,
T_RES => 80 us
)
port map (
n_reset => not sys_reset,
clk => clk_sys,
led_addr => open,
led_red => x"ff",
led_green => x"00",
led_blue => x"ff",
dout => pmod_d(3)
);
-- https://github.com/YosysHQ/yosys/issues/3360
pmod_d(0) <= '0';
pmod_d(1) <= '0';
pmod_d(2) <= '0';
pmod_d(4) <= '0';
pmod_d(5) <= '0';
pmod_d(6) <= '0';
pmod_d(7) <= '0';
pmod_a <= drivers(7 downto 0);
pmod_b <= drivers(15 downto 8);
pmod_d <= drivers(23 downto 16);
sender: process(clk_sys)
constant COUNTER_MAX: natural := 80000000;

47
vhdl/splink.vhdl
View File

@ -4,9 +4,8 @@ use ieee.numeric_std.all;
entity splink is
generic (
NUM_DRIVERS : positive := 16;
ROWS : positive := 100;
COLS : positive := 100
NUM_DRIVERS : positive;
MAX_STRAND_LEN : positive := 256
);
port (
clk : in std_logic;
@ -17,20 +16,34 @@ entity splink is
end entity;
architecture a of splink is
signal count2: unsigned(3 downto 0);
signal count: natural range 0 to 10000000;
signal driver_out : std_logic;
begin
process(clk)
begin
if rising_edge(clk) then
if count = 10000000 then
count <= 0;
count2 <= count2 + 1;
else
count <= count + 1;
end if;
end if;
end process;
ws2812_inst: entity work.ws2812
generic map (
NUM_LEDS => 20,
COLOR_ORDER => "GRB",
T_CLK => 12.5 ns,
drivers <= (15 downto 4 => '0') & std_logic_vector(count2);
T0H => 0.35 us,
T0L => 0.8 us,
T1H => 0.7 us,
T1L => 0.6 us,
T_RES => 80 us
)
port map (
n_reset => not reset,
clk => clk,
led_addr => open,
led_red => x"ff",
led_green => x"00",
led_blue => x"ff",
dout => driver_out
);
-- https://github.com/YosysHQ/yosys/issues/3360
drivers <= (19 => driver_out, others => '0');
end architecture;