diff options
Diffstat (limited to 'fpga/usrp2/vrt/vita_tx_control.v')
| -rw-r--r-- | fpga/usrp2/vrt/vita_tx_control.v | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/fpga/usrp2/vrt/vita_tx_control.v b/fpga/usrp2/vrt/vita_tx_control.v index ab6da8bd0..e966d987c 100644 --- a/fpga/usrp2/vrt/vita_tx_control.v +++ b/fpga/usrp2/vrt/vita_tx_control.v @@ -17,14 +17,12 @@ module vita_tx_control // To DSP Core output [WIDTH-1:0] sample, - output run, + output reg run, input strobe, output [31:0] debug ); - assign sample = sample_fifo_i[5+64+16+WIDTH-1:5+64+16]; - wire [63:0] send_time = sample_fifo_i[63:0]; wire [15:0] seqnum = sample_fifo_i[79:64]; wire eop = sample_fifo_i[80]; @@ -169,11 +167,39 @@ module vita_tx_control send_error <= 0; endcase // case (ibs_state) + assign sample_fifo_dst_rdy_o = (ibs_state == IBS_ERROR) | (strobe & (ibs_state == IBS_RUN)); // FIXME also cleanout - assign run = (ibs_state == IBS_RUN) | (ibs_state == IBS_CONT_BURST); + + assign sample = (ibs_state == IBS_RUN) ? sample_fifo_i[5+64+16+WIDTH-1:5+64+16] : {WIDTH{1'b0}}; + //assign run = (ibs_state == IBS_RUN) | (ibs_state == IBS_CONT_BURST); assign error = send_error; assign ack = send_ack; + localparam MAX_IDLE = 1000000; + // approx 10 ms timeout with a 100 MHz clock, but burning samples will slow that down + reg [19:0] countdown; + + always @(posedge clk) + if(reset | clear) + begin + run <= 0; + countdown <= 0; + end + else + if (ibs_state == IBS_RUN) + if(eob & eop & strobe & sample_fifo_src_rdy_i) + run <= 0; + else + begin + run <= 1; + countdown <= MAX_IDLE; + end + else + if (countdown == 0) + run <= 0; + else + countdown <= countdown - 1; + always @(posedge clk) if(reset | clear) packet_consumed <= 0; |