aboutsummaryrefslogtreecommitdiffstats
path: root/fpga/usrp2/gpmc/edge_sync.v
diff options
context:
space:
mode:
authorJosh Blum <josh@joshknows.com>2010-11-23 15:35:48 -0800
committerJosh Blum <josh@joshknows.com>2010-11-23 15:35:48 -0800
commitf56c1247cbe7b7e90acee2711b5dda3356b9486a (patch)
tree81dadc83537c2c50550cd94e224571e472176c6f /fpga/usrp2/gpmc/edge_sync.v
parent9f94ef843ceca63bcb83b2d473cbba709c9110b6 (diff)
parenteb26e8adb4a5718ee3db3bb7f32c0cd31d060af9 (diff)
downloaduhd-f56c1247cbe7b7e90acee2711b5dda3356b9486a.tar.gz
uhd-f56c1247cbe7b7e90acee2711b5dda3356b9486a.tar.bz2
uhd-f56c1247cbe7b7e90acee2711b5dda3356b9486a.zip
Merge branch 'next' of ettus.sourcerepo.com:ettus/uhdpriv into next
Diffstat (limited to 'fpga/usrp2/gpmc/edge_sync.v')
-rw-r--r--fpga/usrp2/gpmc/edge_sync.v22
1 files changed, 22 insertions, 0 deletions
diff --git a/fpga/usrp2/gpmc/edge_sync.v b/fpga/usrp2/gpmc/edge_sync.v
new file mode 100644
index 000000000..5d9417c08
--- /dev/null
+++ b/fpga/usrp2/gpmc/edge_sync.v
@@ -0,0 +1,22 @@
+
+
+module edge_sync
+ #(parameter POSEDGE = 1)
+ (input clk,
+ input rst,
+ input sig,
+ output trig);
+
+ reg [1:0] delay;
+
+ always @(posedge clk)
+ if(rst)
+ delay <= 2'b00;
+ else
+ delay <= {delay[0],sig};
+
+ assign trig = POSEDGE ? (delay==2'b01) : (delay==2'b10);
+
+endmodule // edge_sync
+
+