diff options
Diffstat (limited to 'vrt')
| -rw-r--r-- | vrt/vita_tx_deframer.v | 35 |
1 files changed, 23 insertions, 12 deletions
diff --git a/vrt/vita_tx_deframer.v b/vrt/vita_tx_deframer.v index 3df88d7f4..c58f23528 100644 --- a/vrt/vita_tx_deframer.v +++ b/vrt/vita_tx_deframer.v @@ -38,8 +38,10 @@ module vita_tx_deframer reg has_streamid_reg, has_classid_reg, has_secs_reg, has_tics_reg; reg has_trailer_reg, is_sob_reg, is_eob_reg; - reg [1:0] vector_phase; - wire line_done; + + reg [15:0] pkt_len; + reg [1:0] vector_phase; + wire line_done; // Output FIFO for packetized data localparam VITA_HEADER = 0; @@ -50,9 +52,14 @@ module vita_tx_deframer localparam VITA_TICS = 5; localparam VITA_TICS2 = 6; localparam VITA_PAYLOAD = 7; - localparam VITA_WAIT = 8; + localparam VITA_STORE = 8; localparam VITA_TRAILER = 9; + wire [15:0] hdr_len = 2 + has_streamid_reg + has_classid_reg + has_classid_reg + has_secs_reg + + has_tics_reg + has_tics_reg + has_trailer_reg; + + wire eop = eof | (pkt_len==hdr_len); // FIXME would ignoring eof allow larger VITA packets? + always @(posedge clk) if(reset | clear) begin @@ -61,20 +68,24 @@ module vita_tx_deframer <= 0; end else - if((vita_state == VITA_WAIT) & fifo_space) - if(eof) // FIXME + if((vita_state == VITA_STORE) & fifo_space) + if(eop) if(has_trailer_reg) vita_state <= VITA_TRAILER; else vita_state <= VITA_HEADER; else - vita_state <= VITA_PAYLOAD; + begin + vita_state <= VITA_PAYLOAD; + pkt_len <= pkt_len - 1; + end else if(src_rdy_i) case(vita_state) VITA_HEADER : begin {has_streamid_reg, has_classid_reg, has_secs_reg, has_tics_reg, has_trailer_reg, is_sob_reg, is_eob_reg} <= {has_streamid, has_classid, has_secs, has_tics, has_trailer, is_sob, is_eob}; + pkt_len <= data_i[15:0]; vector_phase <= 0; if(has_streamid) vita_state <= VITA_STREAMID; @@ -118,13 +129,13 @@ module vita_tx_deframer if(line_done) begin vector_phase <= 0; - vita_state <= VITA_WAIT; + vita_state <= VITA_STORE; end else vector_phase <= vector_phase + 1; VITA_TRAILER : vita_state <= VITA_HEADER; - VITA_WAIT : + VITA_STORE : ; default : vita_state <= VITA_HEADER; @@ -142,7 +153,7 @@ module vita_tx_deframer send_time[63:32] <= data_i[31:0]; VITA_TICS2 : send_time[31:0] <= data_i[31:0]; - VITA_WAIT, VITA_HEADER : + VITA_STORE, VITA_HEADER : send_time[63:0] <= 64'd0; endcase // case (vita_state) @@ -155,14 +166,14 @@ module vita_tx_deframer 3: sample_d <= data_i[31:0]; endcase // case (vector_phase) - + wire store = (vita_state == VITA_STORE); fifo_short #(.WIDTH(4+64+32*MAXCHAN)) short_tx_q (.clk(clk), .reset(reset), .clear(clear), - .datain(fifo_i), .src_rdy_i(vita_state == VITA_IDLE), .dst_rdy_o(fifo_space), + .datain(fifo_i), .src_rdy_i(store), .dst_rdy_o(fifo_space), .dataout(sample_fifo_o), .src_rdy_o(sample_fifo_src_rdy_o), .dst_rdy_i(sample_fifo_dst_rdy_i) ); // sob, eob, has_secs (send_at) ignored on all lines except first - assign fifo_i = {sample_d,sample_c,sample_b,sample_a,has_secs_reg,is_sob_reg,is_eob_reg,eof,send_time}; + assign fifo_i = {sample_d,sample_c,sample_b,sample_a,has_secs_reg,is_sob_reg,is_eob_reg,eop,send_time}; assign dst_rdy_o = (vita_state != VITA_PAYLOAD); |