synchronous and asynchronous gpmc models

3 files changed, 100 insertions, 3 deletions

diff --git a/usrp2/models/gpmc_model.v b/usrp2/models/gpmc_model_async.v
index 6066ede6e..a63a5a8fd 100644
--- a/usrp2/models/gpmc_model.v
+++ b/usrp2/models/gpmc_model_async.v
@@ -1,6 +1,6 @@
 
 
-module gpmc_model
+module gpmc_model_async
   (output EM_CLK, inout [15:0] EM_D, output reg [10:1] EM_A, output reg [1:0] EM_NBE,
    output reg EM_WAIT0, output reg EM_NCS4, output reg EM_NCS6, 
    output reg EM_NWE, output reg EM_NOE );
@@ -92,4 +92,4 @@ module gpmc_model
 	$finish;
      end
    
-endmodule // gpmc_model
+endmodule // gpmc_model_async
diff --git a/usrp2/models/gpmc_model_sync.v b/usrp2/models/gpmc_model_sync.v
new file mode 100644
index 000000000..641720c15
--- /dev/null
+++ b/usrp2/models/gpmc_model_sync.v
@@ -0,0 +1,97 @@
+
+
+module gpmc_model_sync
+  (output reg EM_CLK, inout [15:0] EM_D, output reg [10:1] EM_A, output reg [1:0] EM_NBE,
+   output reg EM_WAIT0, output reg EM_NCS4, output reg EM_NCS6, 
+   output reg EM_NWE, output reg EM_NOE );
+
+   reg [15:0] EM_D_int;
+   assign EM_D = EM_D_int;
+
+   initial
+     begin
+	EM_CLK <= 0;
+	EM_A <= 10'bz;
+	EM_NBE <= 2'b11;
+	EM_NWE <= 1;
+	EM_NOE <= 1;
+	EM_NCS4 <= 1;
+	EM_NCS6 <= 1;
+	EM_D_int <= 16'bz;
+ 	EM_WAIT0 <= 0;  // FIXME this is actually an input
+     end
+   
+   task GPMC_Write;
+      input ctrl;
+      input [10:0] addr;
+      input [15:0] data;
+      begin
+	 EM_CLK <= 1;
+	 #10;
+	 EM_CLK <= 0;
+	 EM_NWE <= 0;
+	 if(ctrl)
+	   EM_NCS6 <= 0;
+	 else
+	   EM_NCS4 <= 0;
+	 EM_A <= addr[10:1];
+	 EM_D_int <= data;
+	 #10;
+	 EM_CLK <= 1;
+	 #10;
+	 EM_CLK <= 0;
+	 EM_NWE <= 1;
+	 EM_NCS4 <= 1;
+	 EM_NCS6 <= 1;
+	 EM_A <= 10'bz;
+	 EM_D_int <= 16'bz;
+	 #100;
+      end
+   endtask // GPMC_Write
+
+   task GPMC_Read;
+      input ctrl;
+      input [10:0] addr;
+      begin
+	 #1.3;
+	 EM_A <= addr[10:1];
+	 #3;
+	 if(ctrl)
+	   EM_NCS6 <= 0;
+	 else
+	   EM_NCS4 <= 0;
+	 #14;
+	 EM_NOE <= 0;
+	 #77.5;
+	 EM_NCS4 <= 1;
+	 EM_NCS6 <= 1;
+	 //#1.5;
+	 $display("Data Read from GPMC: %X",EM_D);
+	 EM_NOE <= 1;
+	 #254;
+	 EM_A <= 10'bz;
+      end
+   endtask // GPMC_Read
+   
+   initial
+     begin
+	#1000;
+	GPMC_Write(1,36,16'hF00D);
+	#1000;
+	GPMC_Read(1,36);
+	#1000;
+	GPMC_Write(0,36,16'h1234);
+	GPMC_Write(0,38,16'h5678);
+	GPMC_Write(0,40,16'h9abc);
+	GPMC_Write(0,11'h2F4,16'hF00D);
+	GPMC_Write(0,11'h7FE,16'hDEAD);
+	GPMC_Write(0,11'h7FE,16'hDEAD);
+	GPMC_Write(0,11'h7FE,16'hDEAD);
+	GPMC_Write(0,11'h7FE,16'hDEAD);
+	GPMC_Write(0,11'h7FE,16'hDEAD);
+	GPMC_Write(0,11'h7FE,16'hDEAD);
+	#100000;
+	$finish;
+     end
+   
+endmodule // gpmc_model
diff --git a/usrp2/top/u1e/tb_u1e.v b/usrp2/top/u1e/tb_u1e.v
index 3cae74c8a..31e4fcb69 100644
--- a/usrp2/top/u1e/tb_u1e.v
+++ b/usrp2/top/u1e/tb_u1e.v
@@ -33,7 +33,7 @@ module tb_u1e();
 		     .EM_WAIT0(EM_WAIT0), .EM_NCS4(EM_NCS4), .EM_NCS6(EM_NCS6), 
 		     .EM_NWE(EM_NWE), .EM_NOE(EM_NOE) );
 
-   gpmc_model gpmc_model
+   gpmc_model_async gpmc_model_async
      (.EM_CLK(EM_CLK), .EM_D(EM_D), .EM_A(EM_A), .EM_NBE(EM_NBE),
       .EM_WAIT0(EM_WAIT0), .EM_NCS4(EM_NCS4), .EM_NCS6(EM_NCS6), 
       .EM_NWE(EM_NWE), .EM_NOE(EM_NOE) );