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- #!/usr/bin/python3
- import smbus, sys
- bus = 1
- ''' you can call this app with arguments: either a single small digit (0,1,2) or
- the device name /dev/i2c-1 '''
- if len(sys.argv)>1:
- if sys.argv[1].isdigit():
- bus = int(sys.argv[1])
- if sys.argv[1].startswith("/dev/i2c"):
- bus = int(sys.argv[1][-1])
- s=smbus.SMBus(bus)
- print("Scan I2C bus /dev/i2c-{} for devices".format(bus))
- print(" 0 1 2 3 4 5 6 7 8 9 a b c d e f",end='')
- def check_i2c(n):
- try:
- s.read_byte(n)
- return True
- except:
- return False
- for i in range(3,120):
- if (i % 16 == 0) or (i == 3):
- print("\n"+"{:02x}:".format(i),end='',flush=True)
- if i == 3:
- print(" ",end='')
- print(" {:02x}".format(i) if check_i2c(i) else " --",end='',flush=True)
- print()
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