diff options
Diffstat (limited to 'tests/ice40/adffs.v')
| -rw-r--r-- | tests/ice40/adffs.v | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/tests/ice40/adffs.v b/tests/ice40/adffs.v index 93c8bf52c..09dc36001 100644 --- a/tests/ice40/adffs.v +++ b/tests/ice40/adffs.v @@ -22,29 +22,25 @@ module adffn q <= d; endmodule -module dffsr +module dffs ( input d, clk, pre, clr, output reg q ); initial begin q = 0; end - always @( posedge clk, posedge pre, posedge clr ) - if ( clr ) - q <= 1'b0; - else if ( pre ) + always @( posedge clk, posedge pre ) + if ( pre ) q <= 1'b1; else q <= d; endmodule -module ndffnsnr +module ndffnr ( input d, clk, pre, clr, output reg q ); initial begin q = 0; end - always @( negedge clk, negedge pre, negedge clr ) - if ( !clr ) - q <= 1'b0; - else if ( !pre ) + always @( negedge clk, negedge pre ) + if ( !pre ) q <= 1'b1; else q <= d; @@ -58,7 +54,7 @@ input a, output b,b1,b2,b3 ); -dffsr u_dffsr ( +dffs u_dffs ( .clk (clk ), .clr (clr), .pre (pre), @@ -66,7 +62,7 @@ dffsr u_dffsr ( .q (b ) ); -ndffnsnr u_ndffnsnr ( +ndffnr u_ndffnr ( .clk (clk ), .clr (clr), .pre (pre), |