zcy
/
pluto_hdl_adi
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ad_edge_detect: Add a flop to output, reset is active high

main
Istvan Csomortani 2015-12-14 15:40:29 +02:00
parent f4e3523390
commit 29a0f27cd1
1 changed files with 15 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
library/common/ad_edge_detect.v
View File

@ -57,7 +57,7 @@ module ad_edge_detect (
localparam ANY_EDGE = 2;
input clk;
input rstn;
input rst;
input in;
output out;
@ -65,8 +65,10 @@ module ad_edge_detect (
reg ff_m1 = 0;
reg ff_m2 = 0;
reg out = 0;
always @(posedge clk) begin
if (rstn == 1) begin
if (rst == 1) begin
ff_m1 <= 0;
ff_m2 <= 0;
end else begin
@ -75,15 +77,19 @@ module ad_edge_detect (
end
end
generate
if (EDGE == POS_EDGE) begin
assign out = ff_m1 & ~ff_m2;
end else if (EDGE == NEG_EDGE) begin
assign out = ~ff_m1 & ff_m2;
always @(posedge clk) begin
if (rst == 1) begin
out <= 1'b0;
end else begin
assign out = ff_m1 ^ ff_m2;
if (EDGE == POS_EDGE) begin
out <= ff_m1 & ~ff_m2;
end else if (EDGE == NEG_EDGE) begin
out <= ~ff_m1 & ff_m2;
end else begin
out <= ff_m1 ^ ff_m2;
end
end
end
endgenerate
endmodule