de-staticize references in FpgaDock

[fleet.git] / src / edu / berkeley / fleet / fpga / FifoModule.java

diff --git a/src/edu/berkeley/fleet/fpga/FifoModule.java b/src/edu/berkeley/fleet/fpga/FifoModule.java
index 3cb6bc5..26e75c7 100644 (file)
--- a/src/edu/berkeley/fleet/fpga/FifoModule.java
+++ b/src/edu/berkeley/fleet/fpga/FifoModule.java
@@ -13,22 +13,53 @@ import static edu.berkeley.fleet.two.FleetTwoFleet.*;
 import static edu.berkeley.fleet.fpga.verilog.Verilog.*;
 
 public class FifoModule extends Module {
-    public FifoModule(int len) {
-        super("fifo"+len);
-        Module.SourcePort  in  = createInputPort("in", WIDTH_PACKET);
-        Module.SinkPort    out = createOutputPort("out", WIDTH_PACKET, "");
+    private int len;
+    private int width;
+    public FifoModule(int len, int width) {
+        super("fifo"+len+"x"+width);
+        this.len = len;
+        this.width = width;
+        Module.SourcePort  in  = createInputPort("in", width);
+        Module.SinkPort    out = createOutputPort("out", width, "");
         Module.InstantiatedModule[] stages = new Module.InstantiatedModule[len];
         if (len==0) {
+            in.hasLatch = false;
+            out.hasLatch = false;
+            addPreCrap("assign out    = in;");
+            addPreCrap("assign out_r  = in_r;");
+            addPreCrap("assign in_a   = out_a;");
+        } else if (len==1) {
             new Event(new Object[] { in, out },
                       new Action[] { in, out, new AssignAction(out, in) });
         } else {
-            Module fifo0 = new FifoModule(0);
+            Module fifo1 = new FifoModule(1,width);
             for(int i=0; i<=len; i++) {
-                if (i<len) stages[i] = new Module.InstantiatedModule(this, fifo0);
+                if (i<len) stages[i] = new Module.InstantiatedModule(this, fifo1);
                 Module.SourcePort driver = i==0 ? in : stages[i-1].getOutputPort("out");
                 Module.SinkPort   driven = i==len ? out : stages[i].getInputPort("in");
                 driver.connect(driven);
             }
         }
     }
+
+    int dislog(int num) {
+        for(int i=0; i<32; i++)
+            if ((1<<i) >= num)
+                return i;
+        throw new RuntimeException();
+    }
+
+    public void dump(String prefix) throws IOException {
+        if (len>16) throw new RuntimeException("FifoModule(i>16) not supported due to SRL16 limitation");
+        if (len<2) {
+            super.dump(prefix);
+            return;
+        }
+        PrintWriter pw = new PrintWriter(new OutputStreamWriter(new FileOutputStream(prefix+"/"+name+".v")));
+        pw.println("`define ADDR_BITS "+dislog(len));
+        pw.println("`define WIDTH " + width);
+        pw.println("`define MODULE_NAME "+name);
+        pw.println("`include \"ramfifo.inc\"");
+        pw.flush();
+    }
 }