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Diffstat (limited to 'Adafruit_Python_MCP3008/examples/differential.py')
| -rw-r--r-- | Adafruit_Python_MCP3008/examples/differential.py | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/Adafruit_Python_MCP3008/examples/differential.py b/Adafruit_Python_MCP3008/examples/differential.py new file mode 100644 index 0000000..df30e65 --- /dev/null +++ b/Adafruit_Python_MCP3008/examples/differential.py @@ -0,0 +1,38 @@ +# Simple example of reading the MCP3008 analog input channels using its +# differential mode. Will print the difference of channel 0 and 1. +# Author: Tony DiCola +# License: Public Domain +import time + +# Import SPI library (for hardware SPI) and MCP3008 library. +import Adafruit_GPIO.SPI as SPI +import Adafruit_MCP3008 + + +# Software SPI configuration: +# CLK = 18 +# MISO = 23 +# MOSI = 24 +# CS = 25 +# mcp = Adafruit_MCP3008.MCP3008(clk=CLK, cs=CS, miso=MISO, mosi=MOSI) + +# Hardware SPI configuration: +SPI_PORT = 0 +SPI_DEVICE = 0 +mcp = Adafruit_MCP3008.MCP3008(spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE)) + +print('Press Ctrl-C to quit...') +while True: + # Grab the difference between channel 0 and 1 (i.e. channel 0 minus 1). + # Note you can specify any value in 0-7 to grab other differences: + # - 0: Return channel 0 minus channel 1 + # - 1: Return channel 1 minus channel 0 + # - 2: Return channel 2 minus channel 3 + # - 3: Return channel 3 minus channel 2 + # - 4: Return channel 4 minus channel 5 + # - 5: Return channel 5 minus channel 4 + # - 6: Return channel 6 minus channel 7 + # - 7: Return channel 7 minus channel 6 + value = mcp.read_adc_difference(0) + print('Channel 0 minus 1: {0}'.format(value)) + time.sleep(0.5) |