library/axi_ltc2387 & projects/cn0577: Disconnect DB when in one lane mode

Signed-off-by: Iulia Moldovan <[email protected]>

Author: IuliaCMoldovan

library/axi_ltc2387/axi_ltc2387_if.v

@@ -200,25 +200,31 @@ module axi_ltc2387_if #(
     .delay_rst (delay_rst),
     .delay_locked (delay_locked));
 
-  ad_data_in #(
-    .FPGA_TECHNOLOGY (FPGA_TECHNOLOGY),
-    .IDDR_CLK_EDGE ("OPPOSITE_EDGE"),
-    .IODELAY_CTRL (0),
-    .IODELAY_GROUP (IO_DELAY_GROUP),
-    .REFCLK_FREQUENCY (DELAY_REFCLK_FREQUENCY)
-  ) i_rx_db (
-    .rx_clk (dco),
-    .rx_data_in_p (db_p),
-    .rx_data_in_n (db_n),
-    .rx_data_p (db_p_int_s),
-    .rx_data_n (db_n_int_s),
-    .up_clk (up_clk),
-    .up_dld (up_dld[1]),
-    .up_dwdata (up_dwdata[9:5]),
-    .up_drdata (up_drdata[9:5]),
-    .delay_clk (delay_clk),
-    .delay_rst (delay_rst),
-    .delay_locked ());
+  // instantiate only if TWOLANES
+  if (TWOLANES) begin
+    ad_data_in #(
+      .FPGA_TECHNOLOGY (FPGA_TECHNOLOGY),
+      .IDDR_CLK_EDGE ("OPPOSITE_EDGE"),
+      .IODELAY_CTRL (0),
+      .IODELAY_GROUP (IO_DELAY_GROUP),
+      .REFCLK_FREQUENCY (DELAY_REFCLK_FREQUENCY)
+    ) i_rx_db (
+      .rx_clk (dco),
+      .rx_data_in_p (db_p),
+      .rx_data_in_n (db_n),
+      .rx_data_p (db_p_int_s),
+      .rx_data_n (db_n_int_s),
+      .up_clk (up_clk),
+      .up_dld (up_dld[1]),
+      .up_dwdata (up_dwdata[9:5]),
+      .up_drdata (up_drdata[9:5]),
+      .delay_clk (delay_clk),
+      .delay_rst (delay_rst),
+      .delay_locked ());
+  end else begin
+    assign db_p_int_s = 1'b0;
+    assign db_n_int_s = 1'b0;
+  end
 
   // clock
 

projects/cn0577/common/cn0577_bd.tcl

@@ -70,8 +70,11 @@ ad_connect dco_p      axi_ltc2387/dco_p
 ad_connect dco_n      axi_ltc2387/dco_n
 ad_connect da_p       axi_ltc2387/da_p
 ad_connect da_n       axi_ltc2387/da_n
-ad_connect db_p       axi_ltc2387/db_p
-ad_connect db_n       axi_ltc2387/db_n
+
+if {$TWOLANES == "1"} {
+  ad_connect db_p       axi_ltc2387/db_p
+  ad_connect db_n       axi_ltc2387/db_n
+}
 
 ad_connect ref_clk                axi_ltc2387_dma/fifo_wr_clk
 ad_connect axi_ltc2387/adc_valid  axi_ltc2387_dma/fifo_wr_en