onewire总线

sunlichao

1. from machine import Pin
   
2. import onewire
   
3. ow = onewire.OneWire(Pin(12)) # create a OneWire bus on GPIO12
   
4. ow.scan()               # return a list of devices on the bus
   
5. ow.reset()              # reset the bus
   
6. ow.readbyte()           # read a byte
   
7. ow.read(5)              # read 5 bytes
   
8. ow.writebyte(0x12)      # write a byte on the bus
   
9. ow.write('123')         # write bytes on the bus
   
10. ow.select_rom(b'12345678') # select a specific device by its ROM code

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