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ip_selctor [2014/12/30 18:32]
admin
ip_selctor [2014/12/30 22:09] (current)
admin
Line 32: Line 32:
   $ sudo i2cdump -y 1 0x20   $ sudo i2cdump -y 1 0x20
  
-Library:\\+**Library:**\\
 [[https://learn.adafruit.com/mcp230xx-gpio-expander-on-the-raspberry-pi/overview]]\\ [[https://learn.adafruit.com/mcp230xx-gpio-expander-on-the-raspberry-pi/overview]]\\
 +Download Adafruit libraries:\\
 +  $ wget https://github.com/adafruit/Adafruit-Raspberry-Pi-Python-Code/archive/master.zip
 +unpack:\\
 +  $ unzip master.zip
 +Example:\\
 +  # Set IP Address with MCP23008
 +  from Adafruit_MCP230xx import *
 +  # Use busnum = 0 for older Raspberry Pi's (256MB)
 +  # Use busnum = 1 for new Raspberry Pi's (512MB with mounting holes)
 +  mcp = Adafruit_MCP230XX(busnum = 1, address = 0x20, num_gpios = 8)
 +  # Set pins to input with the pullup resistor enabled
 +  for i in range(0,8):
 +    mcp.pullup(i, 1)
 +  # Read pins and display the results
 +  # bitshift output, third bit is the output
 +  meineIP=0
 +  for i in range(0,8):
 +    print "%d: %x" % (i, mcp.input(i) >> i)
 +    meineIP = meineIP +  mcp.input(i)
 +  print meineIP
 +
 +