--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/fpga/sniffer-pps/clk_edge.v	Tue Aug 29 20:05:23 2023 +0000
@@ -0,0 +1,19 @@
+/*
+ * This Verilog module captures the logic that detects rising edges of SIM_CLK
+ * for the purpose of counting them.
+ */
+
+module clk_edge (IntClk, SIM_CLK_sync, SIM_CLK_edge);
+
+input IntClk;
+input SIM_CLK_sync;
+output SIM_CLK_edge;
+
+reg prev_state;
+
+always @(posedge IntClk)
+	prev_state <= SIM_CLK_sync;
+
+assign SIM_CLK_edge = SIM_CLK_sync && !prev_state;
+
+endmodule