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Diffstat (limited to 'fpga/usrp2/top/E1x0/u1e.v')
-rw-r--r--fpga/usrp2/top/E1x0/u1e.v15
1 files changed, 13 insertions, 2 deletions
diff --git a/fpga/usrp2/top/E1x0/u1e.v b/fpga/usrp2/top/E1x0/u1e.v
index 903ef7a6f..cdf2a7f0d 100644
--- a/fpga/usrp2/top/E1x0/u1e.v
+++ b/fpga/usrp2/top/E1x0/u1e.v
@@ -121,7 +121,18 @@ module u1e
.D1(1'b1), // 1-bit data input (associated with C1)
.R(1'b0), // 1-bit reset input
.S(1'b0)); // 1-bit set input
-
+
+ // /////////////////////////////////////////////////////////////////////////
+ // RX ADC -- handles inversion
+
+ reg [11:0] rx_i, rx_q;
+ always @(posedge clk_fpga) begin
+ rx_i <= ~DA;
+ rx_q <= ~DB;
+ end
+
+ // /////////////////////////////////////////////////////////////////////////
+
// /////////////////////////////////////////////////////////////////////////
// Main U1E Core
u1e_core u1e_core(.clk_fpga(clk_fpga), .rst_fpga(~debug_pb),
@@ -138,7 +149,7 @@ module u1e
.rx_have_data(overo_gpio146),
.io_tx(io_tx), .io_rx(io_rx),
.tx_i(tx_i), .tx_q(tx_q),
- .rx_i(DA), .rx_q(DB),
+ .rx_i(rx_i), .rx_q(rx_q),
.pps_in(PPS_IN), .proc_int(proc_int) );
// /////////////////////////////////////////////////////////////////////////