初始化提交

boards/default_src/micropython/origin/build/lib/dhtx.py

@@ -0,0 +1,60 @@
+# DHT11/DHT22 driver for MicroPython
+# MIT license; Copyright (c) 2016 Damien P. George
+
+from time import sleep
+try:
+    from esp import dht_readinto
+except:
+    from machine import dht_readinto
+from machine import Pin
+
+class DHTBase:
+    __species = {}
+    __first_init = True
+    def __new__(cls, pin, *args, **kwargs):
+        if pin not in cls.__species.keys():
+            cls.__first_init = True
+            cls.__species[pin] = object.__new__(cls)
+        return cls.__species[pin]
+
+    def __init__(self, pin):
+        if self.__first_init:
+            self.__first_init = False
+            self.pin = Pin(pin)
+            self.buf = bytearray(5)
+            self.err = 0
+
+    def measure(self): 
+        buf = bytearray(5)
+        try:
+            dht_readinto(self.pin, buf)
+            if (buf[0] + buf[1] + buf[2] + buf[3]) & 0xFF == buf[4]:
+                self.buf = buf 
+                self.err = 0
+        except:
+            if self.err > 10:
+                raise AttributeError("DHTx operation error")
+            self.err += 1
+            sleep(0.5)
+            return
+
+class DHT11(DHTBase):
+    def humidity(self):
+        self.measure()
+        return self.buf[0]
+
+    def temperature(self):
+        self.measure()
+        return self.buf[2]
+
+class DHT22(DHTBase):
+    def humidity(self):
+        self.measure()
+        return (self.buf[0] << 8 | self.buf[1]) * 0.1
+
+    def temperature(self):
+        self.measure()
+        t = ((self.buf[2] & 0x7F) << 8 | self.buf[3]) * 0.1
+        if self.buf[2] & 0x80:
+            t = -t
+        return t