1 files changed, 39 insertions, 0 deletions
diff --git a/ice40/pack_tests/ffmodes.v b/ice40/pack_tests/ffmodes.v
new file mode 100644
index 00000000..6ff99bce
--- /dev/null
+++ b/ice40/pack_tests/ffmodes.v
@@ -0,0 +1,39 @@
+module top(input clk, cen, rst, ina, inb, output reg outa, outb, outc, outd);
+
+reg temp0 = 1'b0, temp1 = 1'b0;
+
+always @(posedge clk)
+    if (cen)
+        if(rst)
+            temp0 <= 1'b0;
+        else
+            temp0 <= ina;
+
+always @(negedge clk)
+    if (ina)
+        if(rst)
+            temp1 <= 1'b1;
+        else
+            temp1 <= inb;
+
+
+always @(posedge clk or negedge rst)
+    if(!rst)
+        outa <= 1'b0;
+    else
+        outa <= temp0;
+
+always @(posedge clk)
+    outb <= temp1;
+
+always @(negedge clk)
+    outc <= temp0;
+
+always @(negedge clk or posedge rst)
+    if (rst)
+        outd <= 1'b1;
+    else
+        outd <= temp1;
+
+
+endmodule