Changeset 37 for trunk/MultiChannelUSB

Timestamp:

Sep 7, 2009, 7:21:43 AM (15 years ago)

Author:

demin

Message:

fix communication with fifo_rx_unit

File:

• trunk/MultiChannelUSB/Paella.v (modified) (8 diffs)

trunk/MultiChannelUSB/Paella.v

@@ -106 +106 @@
 
                 .rx_empty(usb_fifo_rx_empty),
-                .rx_rdreq(usb_fifo_rx_rdreq),
+                .rx_rdreq((~usb_fifo_rx_empty) & usb_fifo_rx_rdreq),
                 .rx_q(usb_fifo_rx_data)
         );
         
+        reg             [23:0]  rx_counter;
         reg             [10:0]  tst_counter;    
 
@@ -209 +210 @@
         always @(posedge CLK_50MHz)
         begin
+                if (~usb_fifo_rx_empty)
+                begin
+                        led_reg <= 1'b0;
+                        rx_counter <= 24'd0;
+                end
+                else
+                begin
+                        if (&rx_counter)
+                        begin
+                                led_reg <= 1'b1;
+                        end
+                        else
+                        begin
+                                rx_counter <= rx_counter + 24'd1;
+                        end
+                end
+
                 case(state1)
                         1:
                         begin
-                                usb_fifo_rx_rdreq <= 1'b0;
+                                usb_fifo_rx_rdreq <= 1'b1;
                                 usb_fifo_tx_wrreq <= 1'b0;
                                 hst_reset <= 1'b0;
@@ -221 +239 @@
                         2: 
                         begin
-                                usb_fifo_rx_rdreq <= ~usb_fifo_rx_empty;
                                 if (~usb_fifo_rx_empty)
                                 begin
@@ -227 +244 @@
                                                 8'h30:
                                                 begin
+                                                        usb_fifo_rx_rdreq <= 1'b0;
                                                         hst_reset <= 1'b1;
                                                         state1 <= 4'd1;
@@ -232 +250 @@
                                                 8'h31:
                                                 begin
+                                                        usb_fifo_rx_rdreq <= 1'b0;
                                                         hst_addr <= 12'd0;
                                                         hst_byte_num <= 2'd0;   
@@ -238 +257 @@
                                                 8'h32:
                                                 begin
-                                                        led_reg <= 1'b1;
+                                                        usb_fifo_rx_rdreq <= 1'b0;
                                                         osc_reset <= 1'b1;
                                                         state1 <= 4'd1;
@@ -244 +263 @@
                                                 8'h33:
                                                 begin
-                                                        led_reg <= 1'b0;
+                                                        usb_fifo_rx_rdreq <= 1'b0;
                                                         osc_addr <= osc_start_addr;
                                                         osc_counter <= 10'd0;
@@ -252 +271 @@
                                                 8'h34:
                                                 begin
-                                                        led_reg <= 1'b1;
+                                                        usb_fifo_rx_rdreq <= 1'b0;
                                                         state1 <= 4'd1;
                                                 end
                                                 8'h35:
                                                 begin
-                                                        led_reg <= 1'b0;
+                                                        usb_fifo_rx_rdreq <= 1'b0;
                                                         tst_counter <= 11'd0;   
                                                         state1 <= 4'd9;