Changeset 91 for trunk/MultiChannelUSB/control.v

Timestamp:

Feb 28, 2010, 11:35:16 PM (15 years ago)

Author:

demin

Message:

fix communication with external SRAM

File:

• trunk/MultiChannelUSB/control.v (modified) (5 diffs)

trunk/MultiChannelUSB/control.v

@@ -183 +183 @@
                                         buffer[1] <= 8'd0;
                                         int_bus_cntr <= 32'd0;
-                                        state <= 5'd7;
                                 end
                                 else
                                 begin
-                                        buffer[0] <= 8'd2;
+                                        buffer[0] <= 8'd0;
                                         buffer[1] <= 8'd0;
-                                        state <= 5'd6;
-                                end
+                                end
+                                state <= 5'd7;
                         end
 
@@ -197 +196 @@
                                 buffer[0] <= bus_miso[7:0];
                                 buffer[1] <= bus_miso[15:8];
+                                int_bus_addr <= int_bus_addr + 32'd1;
+                                int_bus_cntr <= int_bus_cntr - 32'd1;
                                 state <= 5'd6;
                         end
@@ -202 +203 @@
                         6:
                         begin
-                                int_bus_addr <= int_bus_addr + 32'd1;
                                 state <= 5'd7;
                         end
@@ -208 +208 @@
                         7:
                         begin
+                                int_data <= buffer[0];
+                                int_wrreq <= 1'b1;
+                                state <= 5'd8;
+                        end
+
+                        8:
+                        begin
                                 if (~tx_full)
                                 begin
-                                        int_data <= buffer[0];
-                                        int_wrreq <= 1'b1;
-                                        state <= 5'd8;
-                                end
-                        end
-
-                        8:
-                        begin
-                                int_data <= buffer[1];
-                                state <= 5'd9;
+                                        int_data <= buffer[1];
+                                        state <= 5'd9;
+                                end
                         end
 
@@ -227 +227 @@
                                 begin
                                         int_wrreq <= 1'b0;
-                                        if (|int_bus_cntr)
-                                        begin
-                                                state <= 5'd5;
-                                                int_bus_cntr <= int_bus_cntr - 32'd1;
-                                        end
-                                        else
-                                        begin
-                                                state <= 5'd0;
-                                        end
+                                        state <= 5'd10;
+                                end
+                        end
+
+                        10:
+                        begin
+                                if (|int_bus_cntr)
+                                begin
+                                        state <= 5'd5;
+                                end
+                                else
+                                begin
+                                        state <= 5'd0;
                                 end
                         end