Add basic repo

ChaCha20_Poly1305_64/sim/chacha20_block.py

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+import cocotb
+
+
+from cocotb.clock import Clock
+from cocotb.triggers import Timer, RisingEdge, FallingEdge
+
+CLK_PERIOD = 4
+
+
+class TB:
+    def __init__(self, dut):
+        self.dut = dut
+
+        cocotb.start_soon(Clock(self.dut.i_clk, CLK_PERIOD, units="ns").start())
+
+@cocotb.test
+async def test_sanity(dut):
+    tb = TB(dut)
+
+    await RisingEdge(tb.dut.i_clk)
+    await RisingEdge(tb.dut.i_clk)