From d7342b46abac60bf4e2811ac4798dc4e06b5844f Mon Sep 17 00:00:00 2001
From: Matt Ettus <matt@ettus.com>
Date: Thu, 15 Apr 2010 14:51:41 -0700
Subject: synchronous and asynchronous gpmc models

---
 usrp2/models/gpmc_model.v       | 95 ----------------------------------------
 usrp2/models/gpmc_model_async.v | 95 ++++++++++++++++++++++++++++++++++++++++
 usrp2/models/gpmc_model_sync.v  | 97 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 192 insertions(+), 95 deletions(-)
 delete mode 100644 usrp2/models/gpmc_model.v
 create mode 100644 usrp2/models/gpmc_model_async.v
 create mode 100644 usrp2/models/gpmc_model_sync.v

(limited to 'usrp2/models')

diff --git a/usrp2/models/gpmc_model.v b/usrp2/models/gpmc_model.v
deleted file mode 100644
index 6066ede6e..000000000
--- a/usrp2/models/gpmc_model.v
+++ /dev/null
@@ -1,95 +0,0 @@
-
-
-module gpmc_model
-  (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 );
-
-   assign EM_CLK = 0;
-   reg [15:0] EM_D_int;
-   assign EM_D = EM_D_int;
-   
-   initial
-     begin
-	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
-	 #2.3;
-	 EM_A <= addr[10:1];
-	 EM_D_int <= data;
-	 #2.01;
-	 if(ctrl)
-	   EM_NCS6 <= 0;
-	 else
-	   EM_NCS4 <= 0;
-	 #14;
-	 EM_NWE <= 0;
-	 #77.5;
-	 EM_NCS4 <= 1;
-	 EM_NCS6 <= 1;
-	 //#1.5;
-	 EM_NWE <= 1;
-	 #60;
-	 EM_A <= 10'bz;
-	 EM_D_int <= 16'bz;
-      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/models/gpmc_model_async.v b/usrp2/models/gpmc_model_async.v
new file mode 100644
index 000000000..a63a5a8fd
--- /dev/null
+++ b/usrp2/models/gpmc_model_async.v
@@ -0,0 +1,95 @@
+
+
+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 );
+
+   assign EM_CLK = 0;
+   reg [15:0] EM_D_int;
+   assign EM_D = EM_D_int;
+   
+   initial
+     begin
+	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
+	 #2.3;
+	 EM_A <= addr[10:1];
+	 EM_D_int <= data;
+	 #2.01;
+	 if(ctrl)
+	   EM_NCS6 <= 0;
+	 else
+	   EM_NCS4 <= 0;
+	 #14;
+	 EM_NWE <= 0;
+	 #77.5;
+	 EM_NCS4 <= 1;
+	 EM_NCS6 <= 1;
+	 //#1.5;
+	 EM_NWE <= 1;
+	 #60;
+	 EM_A <= 10'bz;
+	 EM_D_int <= 16'bz;
+      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_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
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