Changeset 140 for sandbox

Timestamp:

May 8, 2011, 11:13:17 PM (14 years ago)

Author:

demin

Message:

adapt to afe8551

File:

• sandbox/MultiChannelUSB/adc_lvds.v (modified) (5 diffs)

sandbox/MultiChannelUSB/adc_lvds.v

@@ -1 +1 @@
 module adc_lvds
         #(
-                parameter       size    =       3, // number of channels
-                parameter       width   =       12 // channel resolution
+                parameter       size    =       8, // number of channels
+                parameter       width   =       24 // channel resolution
         )
         (
@@ -11 +11 @@
                 input   wire    [size-1:0]                      lvds_d,
 
-                input   wire    [11:0]                          test,
-                input   wire    [11:0]                          trig,
-
                 output  wire                                            adc_frame,
-                output  wire    [size*width-1+12:0]     adc_data
+                output  wire    [size*width-1:0]        adc_data
 
         );
-
+        localparam      width2  =       width + 1;
+                
         reg                                                     state, int_rdreq, adc_frame_reg;
         wire                                            int_wrfull, int_rdempty;
 
-        reg             [size-1:0]                      int_data_h, int_data_l;
+        reg             [size-1:0]                      int_data_p, int_data_n;
 
-        reg     [size*width-1:0]        int_data_reg;
-        wire    [size*width-1:0]        int_data_wire;
+        reg     [2:0]                           int_edge_reg;
 
-        wire    [size*width-1+12:0]     int_q_wire;
-        reg             [size*width-1+12:0]     adc_data_reg;
+        reg     [size*width-1:0]        int_fifo_reg;
+        wire    [size*width-1:0]        int_fifo_wire;
+
+        reg     [size*width2-1:0]       int_data_reg;
+        wire    [size*width2-1:0]       int_data_wire;
+
+        wire    [size*width-1:0]        int_q_wire;
+        reg             [size*width-1:0]        adc_data_reg;
         
+
 
         genvar j;
 
         generate
-                for (j = 0; j < size-1; j = j + 1)
+                for (j = 0; j < size; j = j + 1)
                 begin : INT_DATA
-                        assign int_data_wire[j*width+width-1:j*width] = {int_data_reg[j*width+width-3:j*width], int_data_h[j], int_data_l[j]};
-//                      assign int_data_wire[j*width+width-1:j*width] = test;
+// MSB first
+//                      assign int_data_wire[j*width+width-1:j*width] = {int_data_reg[j*width+width-3:j*width], int_data_p[j], int_data_n[j]};
+// LSB first
+//                      assign int_data_wire[j*width+width-1:j*width] = {int_data_n[j], int_data_p[j], int_data_reg[j*width+width-1:j*width+2]};
+                        assign int_data_wire[j*width2+width2-1:j*width2] = {int_data_n[j], int_data_p[j], int_data_reg[j*width2+width2-1:j*width2+2]};
+                        assign int_fifo_wire[j*width+width-1:j*width] = int_data_reg[j*width2+width2-2:j*width2];
                 end
         endgenerate
-        assign int_data_wire[(size-1)*width+width-1:(size-1)*width] = test;
 
         dcfifo #(
@@ -47 +54 @@
                 .lpm_showahead("ON"),
                 .lpm_type("dcfifo"),
-                .lpm_width(size*width+12),
+                .lpm_width(size*width),
                 .lpm_widthu(4),
                 .rdsync_delaypipe(4),
@@ -54 +61 @@
                 .underflow_checking("ON"),
                 .use_eab("ON")) fifo_unit (
-                .data({trig, int_data_wire}),
+//              .data(int_data_wire),
+                .data(int_fifo_reg),
                 .rdclk(clock),
                 .rdreq((~int_rdempty) & int_rdreq),
@@ -93 +101 @@
         always @ (negedge lvds_dco)
         begin
-                int_data_l <= lvds_d;
+                int_data_n <= lvds_d;
         end
 
         always @ (posedge lvds_dco)
         begin
-                int_data_h <= lvds_d;
+                int_data_p <= lvds_d;
                 int_data_reg <= int_data_wire;
+                int_edge_reg <= {int_edge_reg[1:0], lvds_fco};
+                if (int_edge_reg[1] & (~int_edge_reg[2]))
+                begin
+                        int_fifo_reg <= int_fifo_wire;
+                end
         end