diff options
| -rw-r--r-- | usrp2/udp/prot_eng_tx.v | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/usrp2/udp/prot_eng_tx.v b/usrp2/udp/prot_eng_tx.v index 322c6ec91..3adaaa32b 100644 --- a/usrp2/udp/prot_eng_tx.v +++ b/usrp2/udp/prot_eng_tx.v @@ -71,7 +71,9 @@ module prot_eng_tx wire [15:0] ip_checksum; add_onescomp #(.WIDTH(16)) add_onescomp (.A(header_word[15:0]),.B(ip_length),.SUM(ip_checksum)); - + reg [15:0] ip_checksum_reg; + always @(posedge clk) ip_checksum_reg <= ip_checksum; + always @* case(state) 1 : prot_data <= header_word; // ETH, top half ignored @@ -80,7 +82,7 @@ module prot_eng_tx 4 : prot_data <= header_word; // ETH 5 : prot_data <= { header_word[31:16], ip_length }; // IP 6 : prot_data <= header_word; // IP - 7 : prot_data <= { header_word[31:16], (16'hFFFF ^ ip_checksum) }; // IP + 7 : prot_data <= { header_word[31:16], (16'hFFFF ^ ip_checksum_reg) }; // IP 8 : prot_data <= header_word; // IP 9 : prot_data <= header_word; // IP 10: prot_data <= header_word; // UDP |