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authorJohnathan Corgan <jcorgan@corganenterprises.com>2009-10-01 11:00:25 -0700
committerJohnathan Corgan <jcorgan@corganenterprises.com>2009-10-01 11:07:59 -0700
commit1ff74777e47f3a2edefc5154484f2bdcb86c1a13 (patch)
tree04f94ef4f7f06a210f7532592829332c7f2621f0 /control_lib/cascadefifo2.v
parent7b8f65256b5ea300187ebb6a359df2fa707a295d (diff)
parent42fc55415af499980901c7787f44c7e74b4a9ce1 (diff)
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Merge branch 'new_eth' of http://gnuradio.org/git/matt into master
* 'new_eth' of http://gnuradio.org/git/matt: (42 commits) Fix warnings, mostly from implicitly defined wires or unspecified widths fullchip sim now compiles again, after moving eth and models over to new simple_gemac remove unused opencores remove debugging code no idea where this came from, it shouldn't be here Copied wb_1master back from quad radio Remove old mac. Good riddance. remove unused port More xilinx fifos, more clean up of our fifos might as well use a cascade fifo to help timing and give a little more capacity fix a typo which caused tx glitches Untested fixes for getting serdes onto the new fifo system. Compiles, at least Implement Eth flow control using pause frames parameterized fifo sizes, some reformatting remove unused old style fifo allow control of whether or not to honor flow control, adds some debug lines debug the rx side no longer used, replaced by newfifo version remove special last_line adjustment from ethernet port Firmware now inserts mac source address value in each frame. ...
Diffstat (limited to 'control_lib/cascadefifo2.v')
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diff --git a/control_lib/cascadefifo2.v b/control_lib/cascadefifo2.v
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-
-
-// This FIFO exists to provide an intermediate point for the data on its
-// long trek from one RAM (in the buffer pool) to another (in the longfifo)
-// The shortfifo is more flexible in its placement since it is based on
-// distributed RAM
-
-// This one has the shortfifo on both the in and out sides.
-module cascadefifo2
- #(parameter WIDTH=32, SIZE=9)
- (input clk, input rst,
- input [WIDTH-1:0] datain,
- output [WIDTH-1:0] dataout,
- input read,
- input write,
- input clear,
- output full,
- output empty,
- output [15:0] space,
- output [15:0] occupied);
-
- wire [WIDTH-1:0] data_int, data_int2;
- wire empty_int, full_int, transfer;
- wire empty_int2, full_int2, transfer2;
- wire [4:0] s1_space, s1_occupied, s2_space, s2_occupied;
- wire [15:0] l_space, l_occupied;
-
- shortfifo #(.WIDTH(WIDTH)) shortfifo
- (.clk(clk),.rst(rst),.clear(clear),
- .datain(datain), .write(write), .full(full),
- .dataout(data_int), .read(transfer), .empty(empty_int),
- .space(s1_space),.occupied(s1_occupied) );
-
- longfifo #(.WIDTH(WIDTH),.SIZE(SIZE)) longfifo
- (.clk(clk),.rst(rst),.clear(clear),
- .datain(data_int), .write(transfer), .full(full_int),
- .dataout(data_int2), .read(transfer2), .empty(empty_int2),
- .space(l_space),.occupied(l_occupied) );
-
- shortfifo #(.WIDTH(WIDTH)) shortfifo2
- (.clk(clk),.rst(rst),.clear(clear),
- .datain(data_int2), .write(transfer2), .full(full_int2),
- .dataout(dataout), .read(read), .empty(empty),
- .space(s2_space),.occupied(s2_occupied) );
-
- assign transfer = ~empty_int & ~full_int;
- assign transfer2 = ~empty_int2 & ~full_int2;
-
- assign space = {11'b0,s1_space} + {11'b0,s2_space} + l_space;
- assign occupied = {11'b0,s1_occupied} + {11'b0,s2_occupied} + l_occupied;
-
-endmodule // cascadefifo2
-
-
-
-