Merge branch 'master' into udp

11 files changed, 506 insertions, 0 deletions

diff --git a/usrp1/models/bustri.v b/usrp1/models/bustri.v
new file mode 100644
index 000000000..6e5a0f74c
--- /dev/null
+++ b/usrp1/models/bustri.v
@@ -0,0 +1,17 @@
+
+// Model for tristate bus on altera
+// FIXME do we really need to use a megacell for this?
+
+module bustri (data,
+	       enabledt,
+	       tridata);
+   
+   input [15:0]  data;
+   input 	 enabledt;
+   inout [15:0]  tridata;
+   
+   assign 	 tridata = enabledt ? data :16'bz;
+   
+endmodule // bustri
+
+
diff --git a/usrp1/models/fifo.v b/usrp1/models/fifo.v
new file mode 100644
index 000000000..0ade49e9c
--- /dev/null
+++ b/usrp1/models/fifo.v
@@ -0,0 +1,82 @@
+// 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
+
+
diff --git a/usrp1/models/fifo_1c_1k.v b/usrp1/models/fifo_1c_1k.v
new file mode 100644
index 000000000..d11040b54
--- /dev/null
+++ b/usrp1/models/fifo_1c_1k.v
@@ -0,0 +1,81 @@
+// Model of FIFO in Altera
+
+module fifo_1c_1k ( data, wrreq, rdreq, rdclk, wrclk, aclr, q,
+		    rdfull, rdempty, rdusedw, wrfull, wrempty, wrusedw);
+
+   parameter width = 32;
+   parameter depth = 1024;
+   //`define rd_req 0;  // Set this to 0 for rd_ack, 1 for rd_req
+      
+   input [31:0] data;
+   input 	wrreq;
+   input 	rdreq;
+   input 	rdclk;
+   input 	wrclk;
+   input 	aclr;
+   output [31:0] q;
+   output 	 rdfull;
+   output 	 rdempty;
+   output [9:0]  rdusedw;
+   output 	 wrfull;
+   output 	 wrempty;
+   output [9:0]  wrusedw;
+   
+   reg [width-1:0] mem [0:depth-1];
+   reg [7:0] 	   rdptr;
+   reg [7:0] 	   wrptr;
+   
+`ifdef rd_req
+   reg [width-1:0] q;
+`else
+   wire [width-1:0] q;
+`endif
+   
+   reg [9:0] 	    rdusedw;
+   reg [9:0] 	    wrusedw;
+   
+   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_1c_1k
diff --git a/usrp1/models/fifo_1c_2k.v b/usrp1/models/fifo_1c_2k.v
new file mode 100644
index 000000000..5c3acfef5
--- /dev/null
+++ b/usrp1/models/fifo_1c_2k.v
@@ -0,0 +1,81 @@
+// Model of FIFO in Altera
+
+module fifo_1c_2k ( data, wrreq, rdreq, rdclk, wrclk, aclr, q,
+		    rdfull, rdempty, rdusedw, wrfull, wrempty, wrusedw);
+
+   parameter width = 32;
+   parameter depth = 2048;
+   //`define rd_req 0;  // Set this to 0 for rd_ack, 1 for rd_req
+      
+   input [31:0] data;
+   input 	wrreq;
+   input 	rdreq;
+   input 	rdclk;
+   input 	wrclk;
+   input 	aclr;
+   output [31:0] q;
+   output 	 rdfull;
+   output 	 rdempty;
+   output [10:0]  rdusedw;
+   output 	 wrfull;
+   output 	 wrempty;
+   output [10:0]  wrusedw;
+   
+   reg [width-1:0] mem [0:depth-1];
+   reg [7:0] 	   rdptr;
+   reg [7:0] 	   wrptr;
+   
+`ifdef rd_req
+   reg [width-1:0] q;
+`else
+   wire [width-1:0] q;
+`endif
+   
+   reg [10:0] 	    rdusedw;
+   reg [10:0] 	    wrusedw;
+   
+   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_1c_2k
diff --git a/usrp1/models/fifo_1c_4k.v b/usrp1/models/fifo_1c_4k.v
new file mode 100644
index 000000000..3e5ddd052
--- /dev/null
+++ b/usrp1/models/fifo_1c_4k.v
@@ -0,0 +1,76 @@
+// Model of FIFO in Altera
+
+module fifo_1c_4k ( data, wrreq, rdreq, rdclk, wrclk, aclr, q,
+		    rdfull, rdempty, rdusedw, wrfull, wrempty, wrusedw);
+
+   parameter width = 32;
+   parameter depth = 4096;
+   //`define rd_req 0;  // Set this to 0 for rd_ack, 1 for rd_req
+      
+   input [31:0] data;
+   input 	wrreq;
+   input 	rdreq;
+   input 	rdclk;
+   input 	wrclk;
+   input 	aclr;
+   output [31:0] q;
+   output 	 rdfull;
+   output 	 rdempty;
+   output [7:0]  rdusedw;
+   output 	 wrfull;
+   output 	 wrempty;
+   output [7:0]  wrusedw;
+   
+   reg [width-1:0] mem [0:depth-1];
+   reg [7:0] 	   rdptr;
+   reg [7:0] 	   wrptr;
+   
+`ifdef rd_req
+   reg [width-1:0] q;
+`else
+   wire [width-1:0] q;
+`endif
+   
+   reg [7:0] 	    rdusedw;
+   reg [7:0] 	    wrusedw;
+   
+   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;
+   
+   
+endmodule // fifo_1c_4k
diff --git a/usrp1/models/fifo_1k.v b/usrp1/models/fifo_1k.v
new file mode 100644
index 000000000..acfa4d176
--- /dev/null
+++ b/usrp1/models/fifo_1k.v
@@ -0,0 +1,24 @@
+
+
+module fifo_1k
+  (  input [15:0] data,
+     input 	wrreq,
+     input 	rdreq,
+     input 	rdclk,
+     input 	wrclk,
+     input 	aclr,
+     output [15:0] q,
+     output 	 rdfull,
+     output 	 rdempty,
+     output [9:0] rdusedw,
+     output 	 wrfull,
+     output 	 wrempty,
+     output [9:0]  wrusedw
+     );
+
+fifo #(.width(16),.depth(1024),.addr_bits(10)) fifo_1k 
+  ( data, wrreq, rdreq, rdclk, wrclk, aclr, q,
+    rdfull, rdempty, rdusedw, wrfull, wrempty, wrusedw);
+   
+endmodule // fifo_1k
+   
diff --git a/usrp1/models/fifo_2k.v b/usrp1/models/fifo_2k.v
new file mode 100644
index 000000000..50cd7811d
--- /dev/null
+++ b/usrp1/models/fifo_2k.v
@@ -0,0 +1,24 @@
+
+
+module fifo_2k
+  (  input [15:0] data,
+     input 	wrreq,
+     input 	rdreq,
+     input 	rdclk,
+     input 	wrclk,
+     input 	aclr,
+     output [15:0] q,
+     output 	 rdfull,
+     output 	 rdempty,
+     output [10:0] rdusedw,
+     output 	 wrfull,
+     output 	 wrempty,
+     output [10:0]  wrusedw
+     );
+
+fifo #(.width(16),.depth(2048),.addr_bits(11)) fifo_2k 
+  ( data, wrreq, rdreq, rdclk, wrclk, aclr, q,
+    rdfull, rdempty, rdusedw, wrfull, wrempty, wrusedw);
+   
+endmodule // fifo_1k
+   
diff --git a/usrp1/models/fifo_4k.v b/usrp1/models/fifo_4k.v
new file mode 100644
index 000000000..1fa4ba0a7
--- /dev/null
+++ b/usrp1/models/fifo_4k.v
@@ -0,0 +1,24 @@
+
+
+module fifo_4k
+  (  input [15:0] data,
+     input 	wrreq,
+     input 	rdreq,
+     input 	rdclk,
+     input 	wrclk,
+     input 	aclr,
+     output [15:0] q,
+     output 	 rdfull,
+     output 	 rdempty,
+     output [11:0] rdusedw,
+     output 	 wrfull,
+     output 	 wrempty,
+     output [11:0]  wrusedw
+     );
+
+fifo #(.width(16),.depth(4096),.addr_bits(12)) fifo_4k 
+  ( data, wrreq, rdreq, rdclk, wrclk, aclr, q,
+    rdfull, rdempty, rdusedw, wrfull, wrempty, wrusedw);
+   
+endmodule // fifo_1k
+   
diff --git a/usrp1/models/fifo_4k_18.v b/usrp1/models/fifo_4k_18.v
new file mode 100644
index 000000000..3efbf74f0
--- /dev/null
+++ b/usrp1/models/fifo_4k_18.v
@@ -0,0 +1,26 @@
+
+
+module fifo_4k_18
+  (input  [17:0] data,
+   input         wrreq,
+   input         wrclk,
+   output 	 wrfull,
+   output 	 wrempty,
+   output [11:0] wrusedw,
+
+   output [17:0] q,
+   input         rdreq,
+   input         rdclk,
+   output 	 rdfull,
+   output 	 rdempty,
+   output [11:0] rdusedw,
+
+   input 	 aclr );
+
+fifo #(.width(18),.depth(4096),.addr_bits(12)) fifo_4k 
+  ( data, wrreq, rdreq, rdclk, wrclk, aclr, q,
+    rdfull, rdempty, rdusedw, wrfull, wrempty, wrusedw);
+   
+endmodule // fifo_4k_18
+
+   
diff --git a/usrp1/models/pll.v b/usrp1/models/pll.v
new file mode 100644
index 000000000..1d0cc7966
--- /dev/null
+++ b/usrp1/models/pll.v
@@ -0,0 +1,33 @@
+// -*- verilog -*-
+//
+//  USRP - Universal Software Radio Peripheral
+//
+//  Copyright (C) 2003 Matt Ettus
+//
+//  This program is free software; you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation; either version 2 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program; if not, write to the Free Software
+//  Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+//
+
+// Very simple model for the PLL in the RX buffer
+
+module pll (inclk0,c0);
+   
+   input	  inclk0;
+   output	  c0;
+
+   assign 	  c0 = #9 inclk0;
+      
+endmodule // pll
+
+
diff --git a/usrp1/models/ssram.v b/usrp1/models/ssram.v
new file mode 100644
index 000000000..fd7339970
--- /dev/null
+++ b/usrp1/models/ssram.v
@@ -0,0 +1,38 @@
+
+// Model of Pipelined [ZBT] Synchronous SRAM
+
+module ssram(clock,addr,data,wen,ce);
+   parameter addrbits = 19;
+   parameter depth = 524288;
+
+   input clock;
+   input [addrbits-1:0] addr;
+   inout [35:0] data;
+   input wen;
+   input ce;
+
+   reg [35:0] ram [0:depth-1];
+   
+   reg read_d1,read_d2;
+   reg write_d1,write_d2;
+   reg [addrbits-1:0] addr_d1,addr_d2;
+   
+   always @(posedge clock)
+     begin
+	read_d1 <= #1 ce & ~wen;
+	write_d1 <= #1 ce & wen;
+	addr_d1 <= #1 addr;
+	read_d2 <= #1 read_d1;
+	write_d2 <= #1 write_d1;
+	addr_d2 <= #1 addr_d1;
+	if(write_d2)
+	  ram[addr_d2] = data;
+     end // always @ (posedge clock)
+
+   data = (ce & read_d2) ? ram[addr_d2] : 36'bz;
+
+   always @(posedge clock)
+     if(~ce & (write_d2 | write_d1 | wen))
+       $display("$time ERROR:  RAM CE not asserted during write cycle");
+   
+endmodule // ssram