Changeset 159 for trunk/MultiChannelUSB/adc_lvds.v

Timestamp:

Jan 11, 2012, 4:32:57 PM (13 years ago)

Author:

demin

Message:

adapt to paella v2

File:

• trunk/MultiChannelUSB/adc_lvds.v (modified) (2 diffs)

trunk/MultiChannelUSB/adc_lvds.v

@@ +1 @@
+
+(* ALTERA_ATTRIBUTE = {"{-to int_data_p} DDIO_INPUT_REGISTER=HIGH; {-to int_data_n} DDIO_INPUT_REGISTER=LOW"} *)
+
 module adc_lvds
         #(
@@ -5 +8 @@
         )
         (
+                input   wire                                            clock,
+
                 input   wire                                            lvds_dco,
                 input   wire                                            lvds_fco,
                 input   wire    [size-1:0]                      lvds_d,
 
-                output  wire    [size*width-1:0]        adc_data
+                input   wire    [1:0]                           trig,
+
+                output  wire                                            adc_frame,
+                output  wire    [size*width-1+2:0]      adc_data
+
         );
+        localparam      width2  =       width + 2;
+                
 
-        wire    [size-1:0]      int_data_h, int_data_l;
-        reg     [width-1:0]     int_data_next [size-1:0];
-//      reg     [2*width:0]     int_data_next [size-1:0];
-        reg     [width-1:0]     int_data_reg [size-1:0];
-//      reg     [2*width:0]     int_data_reg [size-1:0];
+        reg                                                     state, int_rdreq, adc_frame_reg;
+        wire                                            int_wrfull, int_rdempty;
 
-        reg     [width-1:0]     int_adc_data [size-1:0];
+        reg             [size-1:0]                      int_data_p, int_data_n;
 
-        integer i;
+        reg     [2:0]                           int_edge_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+2:0]      int_q_wire;
+        reg             [size*width-1+2:0]      adc_data_reg;
+        
+
+
         genvar j;
 
-        altddio_in #(
+        generate
+                for (j = 0; j < size; j = j + 1)
+                begin : INT_DATA
+// 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_reg[j*width2+width2-3:j*width2], int_data_p[j], int_data_n[j]};
+                        assign int_fifo_wire[j*width+width-1:j*width] = int_data_reg[j*width2+width2-1:j*width2+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+width2-3:j*width2];
+                end
+        endgenerate
+
+
+        dcfifo #(
                 .intended_device_family("Cyclone III"),
-                .invert_input_clocks("ON"),
-//              .invert_input_clocks("OFF"),
-                .lpm_type("altddio_in"),
-                .width(size)) altddio_in_unit (
-                .datain(lvds_d),
-                .inclock(lvds_dco),
-                .aclr(1'b0),
-                .dataout_h(int_data_h),
-                .dataout_l(int_data_l),
-                .aset(1'b0),
-                .inclocken(1'b1),
-                .sclr(1'b0),
-                .sset(1'b0));
+                .lpm_numwords(16),
+                .lpm_showahead("ON"),
+                .lpm_type("dcfifo"),
+                .lpm_width(size*width+2),
+                .lpm_widthu(4),
+                .rdsync_delaypipe(4),
+                .wrsync_delaypipe(4),
+                .overflow_checking("ON"),
+                .underflow_checking("ON"),
+                .use_eab("ON")) fifo_unit (
+//              .data(int_data_wire),
+                .data({trig, int_fifo_reg}),
+                .rdclk(clock),
+                .rdreq((~int_rdempty) & int_rdreq),
+                .wrclk(lvds_fco),
+                .wrreq(~int_wrfull),
+                .q(int_q_wire),
+                .rdempty(int_rdempty),
+                .wrfull(int_wrfull),
+                .aclr(),
+                .rdfull(),
+                .rdusedw(),
+                .wrempty(),
+                .wrusedw());
+
+        always @ (posedge clock)
+        begin
+                case (state)
+                        1'b0:
+                        begin
+                                int_rdreq <= 1'b1;
+                                adc_frame_reg <= 1'b0;
+                                state <= 1'b1;
+                        end
+
+                        1'b1: 
+                        begin
+                                if (~int_rdempty)
+                                begin
+                                        int_rdreq <= 1'b0;
+                                        adc_frame_reg <= 1'b1;
+                                        adc_data_reg <= int_q_wire;
+                                        state <= 1'b0;
+                                end
+                        end
+                endcase
+        end
+        
+        always @ (negedge lvds_dco)
+        begin
+                int_data_n <= lvds_d;
+        end
 
         always @ (posedge lvds_dco)
         begin
-                for (i = 0; i < size; i = i + 1)
+                int_data_p <= lvds_d;
+                int_data_reg <= int_data_wire;
+                int_edge_reg <= {(~int_edge_reg[1]), int_edge_reg[0], lvds_fco};
+                if (int_edge_reg[1] & int_edge_reg[2])
                 begin
-                        int_data_reg[i] <= int_data_next[i];
+                        int_fifo_reg <= int_fifo_wire;
                 end
         end
 
-        always @ (posedge lvds_fco)
-        begin
-                for (i = 0; i < size; i = i + 1)
-                begin
-                        int_adc_data[i] <= int_data_next[i];
-//                      int_data_next[i] = {int_data_reg[i][2*width-2:0], int_data_l[i], int_data_h[i]};
-                end
-        end
-
-        always @*
-        begin
-                for (i = 0; i < size; i = i + 1)
-                begin
-                        int_data_next[i] = {int_data_reg[i][width-3:0], int_data_l[i], int_data_h[i]};
-//                      int_data_next[i] = {int_data_reg[i][2*width-2:0], int_data_l[i], int_data_h[i]};
-                end
-        end
-
-        generate
-                for (j = 0; j < size; j = j + 1)
-                begin : ADC_LVDS_OUTPUT
-                        assign adc_data[j*width+width-1:j*width] = int_adc_data[j];
-                end
-        endgenerate
+        assign  adc_frame = adc_frame_reg;
+        assign  adc_data = adc_data_reg;
 
 endmodule