bslathi19/super6502
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Register signals explicitly

Browse Source 
These were previously inferred latches, but now that they are not, we
need to register them explicitly, otherwise they will be 0
This commit is contained in:
Byron Lathi
2024-10-13 20:21:53 -07:00
parent 6bf7fee64b
commit 16858bbb9d
2 changed files with 16 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
hw/super6502_fpga/src/sub/network_processor/src/tcp_packet_generator.sv
View File

@@ -67,6 +67,9 @@ logic data_checksum_clear;
logic [31:0] data_checksum_data;
logic [15:0] data_checksum_final;
logic [31:0] src_ip, dst_ip_next;
logic [31:0] dst_ip, src_ip_next;
checksum_calc u_header_checksum_calc(
.i_rst (i_rst),
.i_clk (i_clk),
@@ -83,11 +86,15 @@ always_ff @(posedge i_clk) begin
checksum_counter <= '0;
state <= IDLE;
data_expand <= '0;
src_ip <= '0;
dst_ip <= '0;
end else begin
counter <= counter_next;
checksum_counter <= checksum_counter_next;
state <= state_next;
data_expand <= data_expand_next;
src_ip <= src_ip_next;
dst_ip <= dst_ip_next;
end
end
@@ -125,6 +132,8 @@ always_comb begin
data_expand_next = data_expand;
src_ip_next = src_ip;
dst_ip_next = dst_ip;
case (state)
IDLE: begin
@@ -142,6 +151,9 @@ always_comb begin
m_ip.ip_source_ip = i_src_ip;
m_ip.ip_dest_ip = i_dst_ip;
src_ip_next = i_src_ip;
dst_ip_next = i_dst_ip;
if (m_ip.ip_hdr_ready) begin
if (i_no_data) begin
state_next = HEADER;
@@ -181,9 +193,9 @@ always_comb begin
end
case (checksum_counter)
0: checksum_data = m_ip.ip_source_ip;
1: checksum_data = m_ip.ip_dest_ip;
2: checksum_data = {8'b0, m_ip.ip_protocol, (i_ip_len - 16'd20)}; // tcp length, not IP length
0: checksum_data = src_ip;
1: checksum_data = dst_ip;
2: checksum_data = {8'b0, 8'h6, (i_ip_len - 16'd20)}; // tcp length, not IP length
3: checksum_data = {i_source_port, i_dest_port};
4: checksum_data = i_seq_number;
5: checksum_data = i_ack_number;

1
hw/super6502_fpga/src/sub/network_processor/src/tcp_parser.sv
View File

@@ -110,6 +110,7 @@ always_comb begin
end
PAYLOAD: begin
s_ip.ip_payload_axis_tready = '1;
if (s_ip.ip_payload_axis_tlast) begin
counter_next = '0;
state_next = HEADER;