Roy
195 lines
6.1 KiB
Python
195 lines
6.1 KiB
Python
from typing import Tuple, Iterable, List
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from time import time, sleep
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from datetime import datetime
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from biopro.impl.gpio import OutputPin, P3Pin
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class Selector:
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"""
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**74LCX138**
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== == == == == == == == == == == == == ==
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E1 E2 E3 A0 A1 A2 O0 O1 O2 O3 O4 O5 O6 O7
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== == == == == == == == == == == == == ==
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H X X X X X H H H H H H H H
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X H X X X X H H H H H H H H
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X X L X X X H H H H H H H H
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L L H L L L L H H H H H H H
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L L H H L L H L H H H H H H
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L L H L H L H H L H H H H H
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L L H H H L H H H L H H H H
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L L H L L H H H H H L H H H
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L L H H L H H H H H H L H H
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L L H L H H H H H H H H L H
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L L H H H H H H H H H H H L
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== == == == == == == == == == == == == ==
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**74LS151**
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== == == == == == == == == == == == == ==
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E A0 A1 A2 I0 I1 I2 I3 I4 I5 I6 I7 O0 O1
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== == == == == == == == == == == == == ==
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H X X X X X X X X X X X H L
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L L L L L X X X X X X X H L
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L L L L H X X X X X X X L H
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L L L H X L X X X X X X H L
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L L L H X H X X X X X X L H
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L L H L X X L X X X X X H L
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L L H L X X H X X X X X L H
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L L H H X X X L X X X X H L
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L L H H X X X H X X X X L H
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L H L L X X X X L X X X H L
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L H L L X X X X H X X X L H
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L H L H X X X X X L X X H L
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L H L H X X X X X H X X L H
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L H H L X X X X X X L X H L
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L H H L X X X X X X H X L H
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L H H H X X X X X X X L H L
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L H H H X X X X X X X H L H
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== == == == == == == == == == == == == ==
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**74LV4051**
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== == == == == == == == == == == == ===
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IH C B A Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 COM
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== == == == == == == == == == == == ===
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L L L L L X X X X X X X L
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L L L L H X X X X X X X H
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L L L H X L X X X X X X L
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L L L H X H X X X X X X H
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L L H L X X L X X X X X L
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L L H L X X H X X X X X H
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L L H H X X X L X X X X L
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L L H H X X X H X X X X H
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L H L L X X X X L X X X L
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L H L L X X X X H X X X H
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L H L H X X X X X L X X L
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L H L H X X X X X H X X H
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L H H L X X X X X X L X L
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L H H L X X X X X X H X H
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L H H H X X X X X X X L L
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L H H H X X X X X X X H H
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H X X X X X X X X X X X L
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== == == == == == == == == == == == ===
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"""
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UART_SELECTOR = 'UART'
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MEM_SELECTOR = 'MEM'
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__slots__ = ('_p', '_p0', '_p1', '_p2', '_channel', '_last_time', '_last_sel')
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def __init__(self, a0: int, a1: int, a2: int):
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self._p = (a0, a1, a2)
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self._p0 = OutputPin.get_used(a0, False)
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self._p1 = OutputPin.get_used(a1, False)
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self._p2 = OutputPin.get_used(a2, False)
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self._channel = 0
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self._last_time = time()
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self._last_sel = self._p[2] << 2 | self._p[1] << 1 | self._p[0]
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@property
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def pins(self) -> Tuple[int, int, int]:
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return self._p
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@property
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def channel(self) -> int:
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return self._channel
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def close(self):
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if self._p0 is not None:
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self._p0.close()
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self._p1.close()
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self._p2.close()
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self._p0: OutputPin = None
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self._p1: OutputPin = None
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self._p2: OutputPin = None
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def _select(self, p: Tuple[bool, bool, bool]):
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value = p[2] << 2 | p[1] << 1 | p[0]
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self._p0.output(p[0])
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self._p1.output(p[1])
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self._p2.output(p[2])
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# if (value == 4 and self._last_sel != 6):
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# print('mem_sel is not use gray code, value:', value, ', last value:', self._last_sel, datetime.now())
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# elif (value == 5 and self._last_sel != 4):
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# print('mem_sel is not use gray code, value:', value, ', last value:', self._last_sel, datetime.now())
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# elif (value == 7 and self._last_sel != 5):
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# print('mem_sel is not use gray code, value:', value, ', last value:', self._last_sel, datetime.now())
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# elif (value == 6 and self._last_sel != 7):
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# print('mem_sel is not use gray code, value:', value, ', last value:', self._last_sel, datetime.now())
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self._last_sel = value
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# current_time = time()
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# print('sel', value, current_time - self._last_time, ',', datetime.now())
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# self._last_time = current_time
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_TABLE = (
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(False, False, False),
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(True, False, False),
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(False, True, False),
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(True, True, False),
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(False, False, True),
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(True, False, True),
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(False, True, True),
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(True, True, True)
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)
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SIZE = len(_TABLE)
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_SELECTOR = tuple(range(SIZE))
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def select(self, channel: int):
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if self._p0 is None or self._p1 is None or self._p2 is None:
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return
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if self._channel != channel:
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self._select(self._TABLE[channel])
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self._channel = channel
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def foreach(self) -> Iterable[int]:
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for i in self._SELECTOR:
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self.select(self._SELECTOR[i])
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yield i
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@classmethod
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def set_selector(cls, select: Tuple[int, ...]):
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for i in select:
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# all i in select should be presented in TABLE
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# noinspection PyStatementEffect
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cls._TABLE[i]
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cls._SELECTOR = select
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@classmethod
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def get(cls, selector: str) -> 'Selector':
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if selector == cls.UART_SELECTOR:
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return Selector(P3Pin.UART_A0, P3Pin.UART_A1, P3Pin.UART_A2)
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elif selector == cls.MEM_SELECTOR:
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return Selector(P3Pin.MEM_A0, P3Pin.MEM_A1, P3Pin.MEM_A2)
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else:
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raise ValueError()
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def _main(argv: List[str]):
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t = argv[0]
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s = int(argv[1])
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Selector.get(t).select(s)
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if __name__ == '__main__':
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import sys
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_main(sys.argv[1:])
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