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| author | Matt Ettus <matt@ettus.com> | 2009-12-14 21:09:29 -0800 |
|---|---|---|
| committer | Matt Ettus <matt@ettus.com> | 2009-12-14 21:09:29 -0800 |
| commit | f238468d299312ed562c6f711150f04b070818ed (patch) | |
| tree | 4ee2d4cb79688c9fae4796f1b46188db97e4a585 /vrt/vita_tx_control.v | |
| parent | c64129bf5dcd9970fd6f70254ef3b93b662ca12f (diff) | |
| download | uhd-f238468d299312ed562c6f711150f04b070818ed.tar.gz uhd-f238468d299312ed562c6f711150f04b070818ed.tar.bz2 uhd-f238468d299312ed562c6f711150f04b070818ed.zip | |
cleaned up the main ibs state machine
Diffstat (limited to 'vrt/vita_tx_control.v')
| -rw-r--r-- | vrt/vita_tx_control.v | 31 |
1 files changed, 22 insertions, 9 deletions
diff --git a/vrt/vita_tx_control.v b/vrt/vita_tx_control.v index 919ded4df..6776e26e5 100644 --- a/vrt/vita_tx_control.v +++ b/vrt/vita_tx_control.v @@ -35,10 +35,11 @@ module vita_tx_control .late(late), .too_early(too_early)); localparam IBS_IDLE = 0; - localparam IBS_WAIT = 1; // FIXME do we need this? - localparam IBS_RUN = 2; + localparam IBS_RUN = 1; // FIXME do we need this? + localparam IBS_CONT_BURST = 2; localparam IBS_UNDERRUN = 3; - + localparam IBS_UNDERRUN_DONE = 4; + reg [2:0] ibs_state; wire clear_state; @@ -62,17 +63,29 @@ module vita_tx_control if(strobe) if(~sample_fifo_src_rdy_i) ibs_state <= IBS_UNDERRUN; - else if(eop & eob) - ibs_state <= IBS_IDLE; - // else if(eop) FIXME do we care if the packet ends? + else if(eop) + if(eob) + ibs_state <= IBS_IDLE; + else + ibs_state <= IBS_CONT_BURST; + IBS_CONT_BURST : + if(strobe) + ibs_state <= IBS_UNDERRUN_DONE; + else if(sample_fifo_src_rdy_i) + ibs_state <= IBS_RUN; + IBS_UNDERRUN : + if(sample_fifo_src_rdy_i & eop) + ibs_state <= IBS_UNDERRUN_DONE; + + IBS_UNDERRUN_DONE : ; endcase // case (ibs_state) - assign sample_fifo_dst_rdy_o = (strobe & (ibs_state == IBS_RUN)); // FIXME also cleanout - assign run = (ibs_state == IBS_RUN); - assign underrun = (ibs_state == IBS_UNDERRUN); + assign sample_fifo_dst_rdy_o = (ibs_state == IBS_UNDERRUN) | (strobe & (ibs_state == IBS_RUN)); // FIXME also cleanout + assign run = (ibs_state == IBS_RUN) | (ibs_state == IBS_CONT_BURST); + assign underrun = (ibs_state == IBS_UNDERRUN_DONE); assign debug = { { now,early,late,too_early,eop,eob,sob,send_at }, { sample_fifo_src_rdy_i, sample_fifo_dst_rdy_o, strobe, run, underrun, ibs_state[2:0] }, |