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-rw-r--r--fpga/usrp2/extram/extram_interface.v53
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diff --git a/fpga/usrp2/extram/extram_interface.v b/fpga/usrp2/extram/extram_interface.v
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--- a/fpga/usrp2/extram/extram_interface.v
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-
-// Temporary buffer pool storage, mostly useful for pre-generated data streams or
-// for making more space to juggle packets in case of eth frames coming out of order
-
-module extram_interface
- (input clk, input rst,
- input set_stb, input [7:0] set_addr, input [31:0] set_data,
-
- // Buffer pool interfaces
- input [31:0] rd_dat_i, output rd_read_o, output rd_done_o, output rd_error_o,
- input rd_sop_i, input rd_eop_i,
- output [31:0] wr_dat_o, output wr_write_o, output wr_done_o, output wr_error_o,
- input wr_ready_i, input wr_full_i,
-
- // RAM Interface
- inout [17:0] RAM_D,
- output [18:0] RAM_A,
- output RAM_CE1n,
- output RAM_CENn,
- input RAM_CLK,
- output RAM_WEn,
- output RAM_OEn,
- output RAM_LDn );
-
- // Command format --
- // Read/_Write , start address[17:0]
- wire [18:0] cmd_in;
- wire cmd_stb, store_wr_cmd, store_rd_cmd, read_wr_cmd, read_rd_cmd;
- wire empty_wr_cmd, empty_rd_cmd, full_wr_cmd, full_rd_cmd;
-
- // Dummy logic
- assign RAM_OEn = 1;
-
- setting_reg #(.my_addr(0))
- sr_ram_cmd (.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
- .in(set_data),.out(cmd_in),.changed(cmd_stb));
-
- reg cmd_stb_d1;
- always @(posedge clk) cmd_stb_d1 <= cmd_stb;
- assign store_wr_cmd = ~cmd_in[18] & cmd_stb & ~cmd_stb_d1;
- assign store_rd_cmd = cmd_in[18] & cmd_stb & ~cmd_stb_d1;
-
- shortfifo #(.WIDTH(19)) wr_cmd_fifo
- (.clk(clk),.rst(rst),.clear(1'b0),
- .datain(cmd_in), .write(store_wr_cmd), .full(full_wr_cmd),
- .dataout(), .read(read_wr_cmd), .empty(empty_wr_cmd) );
-
- shortfifo #(.WIDTH(19)) rd_cmd_fifo
- (.clk(clk),.rst(rst),.clear(1'b0),
- .datain(cmd_in), .write(store_rd_cmd), .full(full_rd_cmd),
- .dataout(), .read(read_rd_cmd), .empty(empty_rd_cmd) );
-
-endmodule // extram_interface