53 lines
1.9 KiB
Python
53 lines
1.9 KiB
Python
import argparse
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import unittest
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from h8536.emulator import H8536Emulator, SCI1_RDR, SCI1_SSR, SCI_SSR_ORER, SCI_SSR_RDRF
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from h8536.emulator.rx_probe import RunContext, UartTiming, _inject_frame_uart_timed, frame_checksum, frame_checksum_ok, parse_frame
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def rom_with_reset(*, reset: int = 0x1000, size: int = 0x1020) -> bytearray:
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rom = bytearray([0xFF] * size)
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rom[0:2] = reset.to_bytes(2, "big")
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rom[reset : reset + 2] = b"\x20\xFE" # BRA self
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return rom
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class EmulatorRxProbeTest(unittest.TestCase):
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def test_parse_frame_accepts_five_bytes_and_appends_checksum(self):
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frame = parse_frame("04 00 00 40 00")
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self.assertEqual(frame, bytes.fromhex("04000040001E"))
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self.assertTrue(frame_checksum_ok(frame))
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def test_parse_frame_accepts_compact_checked_frame(self):
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frame = parse_frame("0780684030C5")
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self.assertEqual(frame, bytes.fromhex("0780684030C5"))
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self.assertEqual(frame_checksum(frame), 0xC5)
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self.assertTrue(frame_checksum_ok(frame))
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def test_parse_frame_rejects_wrong_length(self):
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with self.assertRaises(argparse.ArgumentTypeError):
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parse_frame("04 00 00 40")
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def test_uart_timed_injection_does_not_wait_for_rdrf_consumption(self):
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emulator = H8536Emulator(bytes(rom_with_reset()), clock_hz=10_000_000)
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context = RunContext()
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steps, reason = _inject_frame_uart_timed(
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emulator,
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b"\x11\x22",
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timing=UartTiming(baud=38_400),
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max_steps_per_gap=1000,
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context=context,
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)
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self.assertEqual(reason, "frame_injected_uart_timing")
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self.assertGreater(steps, 0)
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self.assertEqual(emulator.memory.read8(SCI1_RDR), 0x11)
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self.assertEqual(emulator.memory.read8(SCI1_SSR) & (SCI_SSR_RDRF | SCI_SSR_ORER), SCI_SSR_RDRF | SCI_SSR_ORER)
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if __name__ == "__main__":
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unittest.main()
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