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| author | Josh Blum <josh@joshknows.com> | 2012-03-13 15:55:14 -0700 |
|---|---|---|
| committer | Josh Blum <josh@joshknows.com> | 2012-03-16 11:29:18 -0700 |
| commit | 28e0a0e38cecdb3e05c9a15ed43bef1cfce7734b (patch) | |
| tree | 172d59db398930227c9479bce0620f1f0e1200dc /usrp2/control_lib | |
| parent | 56f37de8193b3dd871f9698994e58f9322c7bef5 (diff) | |
| download | uhd-28e0a0e38cecdb3e05c9a15ed43bef1cfce7734b.tar.gz uhd-28e0a0e38cecdb3e05c9a15ed43bef1cfce7734b.tar.bz2 uhd-28e0a0e38cecdb3e05c9a15ed43bef1cfce7734b.zip | |
fifo ctrl: parameterize having a proto header
Diffstat (limited to 'usrp2/control_lib')
| -rw-r--r-- | usrp2/control_lib/settings_fifo_ctrl.v | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/usrp2/control_lib/settings_fifo_ctrl.v b/usrp2/control_lib/settings_fifo_ctrl.v index 564fec97e..160112169 100644 --- a/usrp2/control_lib/settings_fifo_ctrl.v +++ b/usrp2/control_lib/settings_fifo_ctrl.v @@ -21,6 +21,7 @@ module settings_fifo_ctrl #( parameter FIFO_DEPTH = 6, //64 entries depth parameter PROT_DEST = 0, //protocol framer destination + parameter PROT_HDR = 1, //needs a protocol header? parameter ACK_SID = 0 //stream ID for packet ACK ) ( @@ -328,6 +329,9 @@ module settings_fifo_ctrl localparam WRITE_RB_HDR = 3; localparam WRITE_RB_DATA = 4; + //the state for the start of packet condition + localparam WRITE_PKT_HDR = (PROT_HDR)? WRITE_PROT_HDR : WRITE_VRT_HDR; + reg [2:0] out_state; assign out_valid = ~result_fifo_empty; @@ -335,10 +339,10 @@ module settings_fifo_ctrl always @(posedge clock) begin if (reset) begin - out_state <= WRITE_PROT_HDR; + out_state <= WRITE_PKT_HDR; end - else if (writing && out_state == WRITE_RB_DATA) begin - out_state <= WRITE_PROT_HDR; + else if (writing && out_data[33]) begin + out_state <= WRITE_PKT_HDR; end else if (writing) begin out_state <= out_state + 1; @@ -358,7 +362,7 @@ module settings_fifo_ctrl always @* begin case (out_state) WRITE_PROT_HDR: out_data_int <= prot_hdr; - WRITE_VRT_HDR: out_data_int <= {12'b010100000000, out_result_hdr[19:16], 16'd4}; + WRITE_VRT_HDR: out_data_int <= {12'b010100000000, out_result_hdr[19:16], 2'b0, prot_hdr[15:2]}; WRITE_VRT_SID: out_data_int <= ACK_SID; WRITE_RB_HDR: out_data_int <= out_result_hdr; WRITE_RB_DATA: out_data_int <= out_result_data; @@ -368,7 +372,7 @@ module settings_fifo_ctrl assign out_data[35:34] = 2'b0; assign out_data[33] = (out_state == WRITE_RB_DATA); - assign out_data[32] = (out_state == WRITE_PROT_HDR); + assign out_data[32] = (out_state == WRITE_PKT_HDR); assign out_data[31:0] = out_data_int; //------------------------------------------------------------------ |