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| author | Matt Ettus <matt@ettus.com> | 2010-05-03 12:34:45 -0700 |
|---|---|---|
| committer | Matt Ettus <matt@ettus.com> | 2010-05-03 12:34:45 -0700 |
| commit | b30cbe85e8537de6a94e481a57033b5e57a73e12 (patch) | |
| tree | 138215aa5f5b3b12913b581e3819938f00be147e /usrp2/gpmc | |
| parent | eb5bfb963459dbb3e51df49b5aa22fcbda1627d5 (diff) | |
| download | uhd-b30cbe85e8537de6a94e481a57033b5e57a73e12.tar.gz uhd-b30cbe85e8537de6a94e481a57033b5e57a73e12.tar.bz2 uhd-b30cbe85e8537de6a94e481a57033b5e57a73e12.zip | |
have_space and have_packet now stay high even while busy,
as long as there really is more data/space. This should allow bursting
without having additional interrupts.
Also lenghten RX FIFO
Diffstat (limited to 'usrp2/gpmc')
| -rw-r--r-- | usrp2/gpmc/fifo_watcher.v | 6 | ||||
| -rw-r--r-- | usrp2/gpmc/gpmc_async.v | 2 | ||||
| -rw-r--r-- | usrp2/gpmc/gpmc_to_fifo_async.v | 2 |
3 files changed, 6 insertions, 4 deletions
diff --git a/usrp2/gpmc/fifo_watcher.v b/usrp2/gpmc/fifo_watcher.v index 7a3f00483..4bba142b0 100644 --- a/usrp2/gpmc/fifo_watcher.v +++ b/usrp2/gpmc/fifo_watcher.v @@ -10,11 +10,13 @@ module fifo_watcher wire read = src_rdy2 & dst_rdy2 & eof2; wire have_packet_int; reg [15:0] counter; + wire [4:0] pkt_count; fifo_short #(.WIDTH(16)) frame_lengths (.clk(clk), .reset(reset), .clear(clear), .datain(counter), .src_rdy_i(write), .dst_rdy_o(), - .dataout(length), .src_rdy_o(have_packet_int), .dst_rdy_i(read) ); + .dataout(length), .src_rdy_o(have_packet_int), .dst_rdy_i(read), + .occupied(pkt_count), .space()); always @(posedge clk) if(reset | clear) @@ -38,7 +40,7 @@ module fifo_watcher if(reset | clear) have_packet <= 0; else - have_packet <= have_packet_int & ~in_packet; + have_packet <= (have_packet_int & ~in_packet) | (pkt_count>1) ; always @(posedge clk) if(reset | clear) diff --git a/usrp2/gpmc/gpmc_async.v b/usrp2/gpmc/gpmc_async.v index 02a00ce57..dd06478b3 100644 --- a/usrp2/gpmc/gpmc_async.v +++ b/usrp2/gpmc/gpmc_async.v @@ -78,7 +78,7 @@ module gpmc_async .f36_datain(rx_data_i), .f36_src_rdy_i(rx_src_rdy_i), .f36_dst_rdy_o(rx_dst_rdy_o), .f18_dataout(rx18_data), .f18_src_rdy_o(rx18_src_rdy), .f18_dst_rdy_i(rx18_dst_rdy) ); - fifo_cascade #(.WIDTH(18), .SIZE(10)) rx_fifo + fifo_cascade #(.WIDTH(18), .SIZE(12)) rx_fifo (.clk(fifo_clk), .reset(fifo_rst), .clear(0), .datain(rx18_data), .src_rdy_i(rx18_src_rdy), .dst_rdy_o(rx18_dst_rdy), .space(rx_fifo_space), .dataout(rx18b_data), .src_rdy_o(rx18b_src_rdy), .dst_rdy_i(rx18b_dst_rdy), .occupied()); diff --git a/usrp2/gpmc/gpmc_to_fifo_async.v b/usrp2/gpmc/gpmc_to_fifo_async.v index 6232244d4..3d29745a2 100644 --- a/usrp2/gpmc/gpmc_to_fifo_async.v +++ b/usrp2/gpmc/gpmc_to_fifo_async.v @@ -57,7 +57,7 @@ module gpmc_to_fifo_async if(fifo_rst) fifo_ready <= 0; else - fifo_ready <= first_write & (fifo_space > 16'd1023); + fifo_ready <= /* first_write & */ (fifo_space > 16'd1023); always @(posedge fifo_clk) if(fifo_rst) |