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vhdl: implement frame number checking

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This commit is contained in:
Xiretza 2022-06-06 16:45:16 +02:00
parent 4d07ec3fa1
commit 904f34f4d4
2 changed files with 49 additions and 26 deletions
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40
vhdl/arty_a7.vhdl
View file

@ -190,7 +190,8 @@ architecture a of arty_a7 is
signal sys_reset : std_logic;
signal frame_done : std_logic;
signal frame_number : unsigned(31 downto 0);
signal prev_frame_number : unsigned(31 downto 0);
begin
leds_simple <= (others => '0');
led0 <= (others => '0');
@ -299,27 +300,28 @@ begin
pmod_d <= drivers(23 downto 16);
sender: process(sys_clk)
variable frame_counter : unsigned(31 downto 0);
begin
if sys_reset then
frame_counter := (others => '0');
elsif rising_edge(sys_clk) then
if pixel_source_valid then
remote_ip_address <= pixel_source_src_ip_address;
remote_port <= pixel_source_src_port;
end if;
if rising_edge(sys_clk) then
if sys_reset then
prev_frame_number <= frame_number;
else
if pixel_source_valid then
remote_ip_address <= pixel_source_src_ip_address;
remote_port <= pixel_source_src_port;
end if;
if frame_done then
pixel_sink_length <= x"0004";
pixel_sink_data <= std_logic_vector(frame_counter);
pixel_sink_valid <= '1';
pixel_sink_last <= '1';
if frame_number /= prev_frame_number then
prev_frame_number <= frame_number;
frame_counter := frame_counter + 1;
end if;
pixel_sink_length <= x"0004";
pixel_sink_data <= std_logic_vector(frame_number);
pixel_sink_valid <= '1';
pixel_sink_last <= '1';
end if;
if pixel_sink_ready and pixel_sink_valid then
pixel_sink_valid <= '0';
if pixel_sink_ready and pixel_sink_valid then
pixel_sink_valid <= '0';
end if;
end if;
end if;
end process;
@ -337,7 +339,7 @@ begin
udp_last => pixel_source_last,
udp_data => pixel_source_data,
frame_done => frame_done,
frame_number => frame_number,
drivers => drivers
);

35
vhdl/splink.vhdl
View file

@ -15,7 +15,7 @@ entity splink is
udp_last : in std_logic;
udp_data : in std_logic_vector(31 downto 0);
frame_done : out std_logic;
frame_number : out unsigned(31 downto 0);
drivers : out std_logic_vector(NUM_STRANDS-1 downto 0)
);
@ -37,9 +37,14 @@ architecture a of splink is
signal active_strand: natural range 0 to NUM_STRANDS-1;
signal num_pixels: natural range 1 to MAX_STRAND_LEN;
signal frame_number: unsigned(31 downto 0);
signal current_frame: unsigned(31 downto 0);
signal pixels_received: natural range 0 to MAX_STRAND_LEN-1;
signal clear_write_flags : std_logic;
signal all_strands_written : std_logic;
signal some_strands_written : std_logic;
type receive_state_t is (FRAME_NUM, STRAND_NUM, DATA, DROP);
signal receive_state : receive_state_t;
begin
@ -85,7 +90,7 @@ begin
end if;
end if;
if frame_done then
if clear_write_flags then
led_data_arr(i).was_written <= '0';
end if;
end if;
@ -94,11 +99,14 @@ begin
process(led_data_arr)
begin
frame_done <= '1';
all_strands_written <= '1';
some_strands_written <= '0';
for i in 0 to NUM_STRANDS-1 loop
if not led_data_arr(i).was_written then
frame_done <= '0';
if led_data_arr(i).was_written then
some_strands_written <= '1';
else
all_strands_written <= '0';
end if;
end loop;
end process;
@ -106,8 +114,16 @@ begin
fsm: process(clk)
begin
if rising_edge(clk) then
clear_write_flags <= '0';
if all_strands_written then
frame_number <= current_frame;
clear_write_flags <= '1';
end if;
if reset then
receive_state <= STRAND_NUM;
clear_write_flags <= '1';
elsif udp_valid then
if udp_last then
-- always resynchronize to start of packet
@ -125,7 +141,12 @@ begin
receive_state <= FRAME_NUM;
when FRAME_NUM =>
frame_number <= unsigned(udp_data);
if not some_strands_written then
current_frame <= unsigned(udp_data);
elsif current_frame /= unsigned(udp_data) then
current_frame <= unsigned(udp_data);
clear_write_flags <= '1';
end if;
pixels_received <= 0;
receive_state <= DATA;