diff options
Diffstat (limited to 'usrp2')
| -rw-r--r-- | usrp2/vrt/vita_tx_deframer.v | 88 |
1 files changed, 51 insertions, 37 deletions
diff --git a/usrp2/vrt/vita_tx_deframer.v b/usrp2/vrt/vita_tx_deframer.v index 62498836f..b187ab97c 100644 --- a/usrp2/vrt/vita_tx_deframer.v +++ b/usrp2/vrt/vita_tx_deframer.v @@ -118,21 +118,7 @@ module vita_tx_deframer <= 0; seqnum_err <= 0; end - else - if((vita_state == VITA_STORE) & fifo_space) - if(vita_eof) - if(eof) - vita_state <= (USE_TRANS_HEADER==1) ? VITA_TRANS_HEADER : VITA_HEADER; - else if(has_trailer_reg) - vita_state <= VITA_TRAILER; - else - vita_state <= VITA_DUMP; - else - begin - vita_state <= VITA_PAYLOAD; - pkt_len <= pkt_len - 1; - end - else if(src_rdy_i) + else if(src_rdy_i & dst_rdy_o) begin //valid read case(vita_state) VITA_TRANS_HEADER : begin @@ -184,14 +170,33 @@ module vita_tx_deframer vita_state <= VITA_TICS2; VITA_TICS2 : vita_state <= VITA_PAYLOAD; - VITA_PAYLOAD : - if(line_done) - begin - vector_phase <= 0; - vita_state <= VITA_STORE; - end - else - vector_phase <= vector_phase + 1; + + VITA_PAYLOAD : begin + + //step through each element until line done, then reset + vector_phase <= (line_done)? 0: vector_phase + 1; + + //decrement the packet count after each line + pkt_len <= (line_done)? pkt_len - 1 : pkt_len; + + //end of frame reached, determine next state + //otherwise, keep processing through the payload + if (line_done && vita_eof) begin + + if (eof) begin + vita_state <= (USE_TRANS_HEADER==1) ? VITA_TRANS_HEADER : VITA_HEADER; + end + else if (has_trailer_reg) begin + vita_state <= VITA_TRAILER; + end + else begin + vita_state <= VITA_DUMP; + end + + end //line_done && vita_eof + + end //end VITA_PAYLOAD + VITA_TRAILER : if(eof) vita_state <= (USE_TRANS_HEADER==1) ? VITA_TRANS_HEADER : VITA_HEADER; @@ -206,11 +211,12 @@ module vita_tx_deframer vita_state <= (USE_TRANS_HEADER==1) ? VITA_TRANS_HEADER : VITA_HEADER; endcase // case (vita_state) + end //valid read + assign line_done = (vector_phase == numchan); wire [FIFOWIDTH-1:0] fifo_i; reg [63:0] send_time; - reg [31:0] sample_a, sample_b, sample_c, sample_d; always @(posedge clk) case(vita_state) @@ -219,28 +225,36 @@ module vita_tx_deframer VITA_TICS2 : send_time[31:0] <= data_i[31:0]; endcase // case (vita_state) - + + //sample registers for de-framing a vector input + reg [31:0] sample_reg [1:0]; always @(posedge clk) - if(vita_state == VITA_PAYLOAD) - case(vector_phase) - 0: sample_a <= data_i[31:0]; - 1: sample_b <= data_i[31:0]; - 2: sample_c <= data_i[31:0]; - 3: sample_d <= data_i[31:0]; - endcase // case (vector_phase) - - wire store = (vita_state == VITA_STORE); + if(src_rdy_i && dst_rdy_o) + sample_reg[vector_phase] <= data_i[31:0]; + + wire store = (vita_state == VITA_PAYLOAD)? (src_rdy_i && line_done) : 0; + assign dst_rdy_o = (vita_state == VITA_PAYLOAD)? fifo_space : 1; + fifo_short #(.WIDTH(FIFOWIDTH)) short_tx_q (.clk(clk), .reset(reset), .clear(clear), .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) ); + //assign registered/live data to the samples vector + //the numchan'th sample vector is muxed to live data + wire [(32*MAXCHAN)-1:0] samples; + generate + genvar i; + for (i=0; i < MAXCHAN; i = i +1) begin : assign_samples + wire live_data = (i == (MAXCHAN-1))? 1 : numchan == i; + assign samples[32*i + 31:32*i] = (live_data)? data_i[31:0] : sample_reg[i]; + end + endgenerate + // sob, eob, has_tics (send_at) ignored on all lines except first - assign fifo_i = {sample_d,sample_c,sample_b,sample_a,seqnum_err,has_tics_reg,is_sob_reg,is_eob_reg,eop, + assign fifo_i = {samples,seqnum_err,has_tics_reg,is_sob_reg,is_eob_reg,eop, 12'd0,seqnum_reg[3:0],send_time}; - assign dst_rdy_o = ~(vita_state == VITA_PAYLOAD) & ~((vita_state==VITA_STORE)& ~fifo_space) ; - assign debug = { { 8'b0 }, { 8'b0 }, { eof, line_done, store, fifo_space, src_rdy_i, dst_rdy_o, vector_phase[1:0] }, |