51 lines
1.3 KiB
Plaintext
51 lines
1.3 KiB
Plaintext
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package PinSync_Test;
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import Assert::*;
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import StmtFSM::*;
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import PinSync::*;
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import Testing::*;
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module mkTB();
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let testflags <- mkTestFlags();
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let cycles <- mkCycleCounter();
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Reg#(UInt#(2)) dut <- mkPinSync(0);
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function Action check_dut_val(UInt#(2) want_val);
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return action
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if (testflags.verbose)
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$display("%0d: PinSync = %0d, want %0d", cycles.all, dut, want_val);
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dynamicAssert(dut == want_val, "wrong value");
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endaction;
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endfunction
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function Stmt check_sync(UInt#(2) starting_val, UInt#(2) want_val);
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return seq
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action
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check_dut_val(starting_val);
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dut <= want_val;
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cycles.reset();
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if (testflags.verbose)
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$display("%0d: write(%0d)", cycles.all, want_val);
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endaction
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check_dut_val(starting_val);
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action
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check_dut_val(want_val);
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dynamicAssert(cycles == 2, "synchronizer didn't sync at the right time");
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endaction
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endseq;
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endfunction
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runTest(100,
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mkTest("PinSync", seq
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check_sync(0, 2);
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check_sync(2, 3);
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check_sync(3, 1);
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endseq));
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endmodule
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endpackage
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