examples/pi_busio_i2c.py

   1 import time
   2 import sys
   3 import board
   4 import busio
   5
   6 print("hello blinka!")
   7
   8 i2c = busio.I2C(board.SCL, board.SDA)
   9
  10 print("I2C devices found: ", [hex(i) for i in i2c.scan()])
  11
  12 if not 0x18 in i2c.scan():
  13     print("Didn't find MCP9808")
  14     sys.exit()
  15
  16
  17 def temp_c(data):
  18     value = data[0] << 8 | data[1]
  19     temp = (value & 0xFFF) / 16.0
  20     if value & 0x1000:
  21         temp -= 256.0
  22     return temp
  23
  24
  25 while True:
  26     i2c.writeto(0x18, bytes([0x05]), stop=False)
  27     result = bytearray(2)
  28     i2c.readfrom_into(0x18, result)
  29     print(temp_c(result))
  30     time.sleep(0.5)