onewireio – Maxim(原Dallas Semi)单线协议的低级位原语

协议定义在这里:https://www.maximintegrated.com/en/app-notes/index.mvp/id/126

在这些板上可用
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class onewireio.OneWire(pin: microcontroller.Pin)

创建与给定引脚关联的 OneWire 对象。

该对象实现了协议的最低级别的时间敏感位。

参数

pin (Pin) –连接到 OneWire 总线的引脚

笔记

OneWire 类在 CircuitPython 7.x上busiobitbangio中可用以实现向后兼容性,但将在 CircuitPython 8.0.0 中删除。

阅读一系列简短的脉冲:

import onewireio
import board

onewire = onewireio.OneWire(board.D7)
onewire.reset()
onewire.write_bit(True)
onewire.write_bit(False)
print(onewire.read_bit())
deinit(self)None

取消初始化 OneWire 总线并释放任何硬件资源以供重用。

__enter__(self)OneWire

上下文管理器使用的无操作。

__exit__(self)None

退出上下文时自动取消初始化硬件。有关更多信息,请参阅 Lifetime 和 ContextManagers

reset(self)bool

重置 OneWire 总线并读取在线状态

返回

至少存在一台设备时为 False

返回类型

bool

read_bit(self)bool

稍读

返回

位状态读取

返回类型

bool

write_bit(self, value: bool)None

根据值写出一点。