RPiMCP23S17
============
This is a Python module that abstracts the GPIO expander MCP23S17. It is intended for the use on a Raspberry Pi.
Provided Functions
------------------
As a quick overview, the module provides the following functions. Refer to the module documentation for details:
- open
- close
- setPullupMode
- setDirection
- digitalRead
- digitalWrite
- writeGPIO
- readGPIO
Installation
------------
If not already done, you need to install PIP via::
sudo apt-get install python-dev python-pip
Install from `PyPI <https://pypi.python.org/pypi/RPiMCP23S17>`_::
pip install RPiMCP23S17
Example
-------
The following demo peridically toggles all pins of two MCP23S17 components::
from RPiMCP23S17.MCP23S17 import MCP23S17
import time
mcp1 = MCP23S17(bus=0x00, pin_cs=0x00, device_id=0x00)
mcp2 = MCP23S17(bus=0x00, pin_cs=0x00, device_id=0x01)
mcp1.open()
mcp2.open()
for x in range(0, 16):
mcp1.setDirection(x, mcp1.DIR_OUTPUT)
mcp2.setDirection(x, mcp1.DIR_OUTPUT)
print "Starting blinky on all pins (CTRL+C to quit)"
while (True):
for x in range(0, 16):
mcp1.digitalWrite(x, MCP23S17.LEVEL_HIGH)
mcp2.digitalWrite(x, MCP23S17.LEVEL_HIGH)
time.sleep(1)
for x in range(0, 16):
mcp1.digitalWrite(x, MCP23S17.LEVEL_LOW)
mcp2.digitalWrite(x, MCP23S17.LEVEL_LOW)
time.sleep(1)
# the lines below essentially have the same effect as the lines above
mcp1.writeGPIO(0xFFF)
mcp2.writeGPIO(0xFFF)
time.sleep(1)
mcp1.writeGPIO(0x0)
mcp2.writeGPIO(0x0)
time.sleep(1)