47 lines
1.1 KiB
Python
47 lines
1.1 KiB
Python
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from migen import *
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from buffer import Buffer
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BUFFER_DEPTH=8
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full_test_bytes = [0xDE, 0xAD, 0xBE, 0xEF, 0xBA, 0xD0, 0xCA, 0xFE, 0x15, 0x77]
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def testbench(dut, length=10):
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# dut = Buffer(8, BUFFER_DEPTH)
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# full_test_bytes = [0xDE, 0xAD, 0xBE, 0xEF, 0xBA, 0xD0, 0xCA, 0xFE, 0x15, 0x77]
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test_data = full_test_bytes[:min(BUFFER_DEPTH, length)]
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# Initial condition, stb low
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yield dut.i_stb.eq(0)
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yield
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# Append bytes one-by-one
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for number in test_data:
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yield dut.din.eq(number)
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yield dut.i_stb.eq(1)
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yield
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# Deassert input strobe to buffers
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yield dut.i_stb.eq(0)
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yield
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# Receive bytes on-by-one
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for number in test_data:
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assert (yield dut.o_stb) == 1
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assert (yield dut.dout) == number
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yield dut.o_ack.eq(1)
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yield
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yield dut.o_ack.eq(0)
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yield
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yield
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yield
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yield
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assert (yield dut.o_stb) == 0
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for buffer_len in range(len(full_test_bytes)):
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dut = Buffer(8, BUFFER_DEPTH)
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run_simulation(dut, testbench(dut, length=buffer_len), vcd_name="buffer.vcd")
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