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-rw-r--r--fpga/usrp2/top/u2plus/u2plus.v5
1 files changed, 4 insertions, 1 deletions
diff --git a/fpga/usrp2/top/u2plus/u2plus.v b/fpga/usrp2/top/u2plus/u2plus.v
index c0140e989..7c2270df6 100644
--- a/fpga/usrp2/top/u2plus/u2plus.v
+++ b/fpga/usrp2/top/u2plus/u2plus.v
@@ -348,12 +348,15 @@ module u2plus
// DAC A is also inverted in schematic to facilitate clean layout
always @(negedge dsp_clk) DACA <= ~dac_b_int;
always @(negedge dsp_clk) DACB <= dac_a_int;
+
+ wire pps;
+ assign pps = PPS_IN ^ PPS2_IN;
u2plus_core u2p_c(.dsp_clk (dsp_clk),
.wb_clk (wb_clk),
.clock_ready (clock_ready),
.clk_to_mac (CLK_TO_MAC_int2),
- .pps_in (PPS_IN),
+ .pps_in (pps),
.leds (leds_int),
.debug (debug[31:0]),
.debug_clk (debug_clk[1:0]),