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authorMartin Braun <martin.braun@ettus.com>2014-10-07 11:25:20 +0200
committerMartin Braun <martin.braun@ettus.com>2014-10-07 11:25:20 +0200
commitfd3e84941de463fa1a7ebab0a69515b4bf2614cd (patch)
tree3fa721a13d41d2c0451d663a59a220a38fd5e614 /fpga/usrp1/models/fifo.v
parent3b66804e41891e358c790b453a7a59ec7462dba4 (diff)
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Removed copy of FPGA source files.
Diffstat (limited to 'fpga/usrp1/models/fifo.v')
-rw-r--r--fpga/usrp1/models/fifo.v82
1 files changed, 0 insertions, 82 deletions
diff --git a/fpga/usrp1/models/fifo.v b/fpga/usrp1/models/fifo.v
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--- a/fpga/usrp1/models/fifo.v
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-// Model of FIFO in Altera
-
-module fifo( data, wrreq, rdreq, rdclk, wrclk, aclr, q,
- rdfull, rdempty, rdusedw, wrfull, wrempty, wrusedw);
-
- parameter width = 16;
- parameter depth = 1024;
- parameter addr_bits = 10;
-
- //`define rd_req 0; // Set this to 0 for rd_ack, 1 for rd_req
-
- input [width-1:0] data;
- input wrreq;
- input rdreq;
- input rdclk;
- input wrclk;
- input aclr;
- output [width-1:0] q;
- output rdfull;
- output rdempty;
- output reg [addr_bits-1:0] rdusedw;
- output wrfull;
- output wrempty;
- output reg [addr_bits-1:0] wrusedw;
-
- reg [width-1:0] mem [0:depth-1];
- reg [addr_bits-1:0] rdptr;
- reg [addr_bits-1:0] wrptr;
-
-`ifdef rd_req
- reg [width-1:0] q;
-`else
- wire [width-1:0] q;
-`endif
-
- integer i;
-
- always @( aclr)
- begin
- wrptr <= #1 0;
- rdptr <= #1 0;
- for(i=0;i<depth;i=i+1)
- mem[i] <= #1 0;
- end
-
- always @(posedge wrclk)
- if(wrreq)
- begin
- wrptr <= #1 wrptr+1;
- mem[wrptr] <= #1 data;
- end
-
- always @(posedge rdclk)
- if(rdreq)
- begin
- rdptr <= #1 rdptr+1;
-`ifdef rd_req
- q <= #1 mem[rdptr];
-`endif
- end
-
-`ifdef rd_req
-`else
- assign q = mem[rdptr];
-`endif
-
- // Fix these
- always @(posedge wrclk)
- wrusedw <= #1 wrptr - rdptr;
-
- always @(posedge rdclk)
- rdusedw <= #1 wrptr - rdptr;
-
- assign wrempty = (wrusedw == 0);
- assign wrfull = (wrusedw == depth-1);
-
- assign rdempty = (rdusedw == 0);
- assign rdfull = (rdusedw == depth-1);
-
-endmodule // fifo
-
-