From 29ab52420f909d33af7b47f19adc12382d17c0ca Mon Sep 17 00:00:00 2001
From: michael-west <michael.west@ettus.com>
Date: Sun, 13 Feb 2022 18:12:30 -0800
Subject: [PATCH] fpga: rfnoc: Fix PPS edge detection

Make timekeeper module sample rising edge instead of falling edge of PPS
signal.

Signed-off-by: michael-west <michael.west@ettus.com>


Original-commit: b6c7e99830f10c21262247cafa3e077fe3f54119
---
 lib/rfnoc/utils/timekeeper.v | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/rfnoc/utils/timekeeper.v b/lib/rfnoc/utils/timekeeper.v
index 2b43c7e..4361188 100644
--- a/lib/rfnoc/utils/timekeeper.v
+++ b/lib/rfnoc/utils/timekeeper.v
@@ -244,7 +244,7 @@ module timekeeper #(
       pps_edge <= 0;
     end else begin
       pps_del <= pps;
-      pps_edge<= pps_del & ~pps;
+      pps_edge<= pps & ~pps_del;
     end
   end