Adding MCP3008 library

2 files changed, 77 insertions, 0 deletions

diff --git a/Adafruit_Python_MCP3008/examples/differential.py b/Adafruit_Python_MCP3008/examples/differential.py
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+++ b/Adafruit_Python_MCP3008/examples/differential.py
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+# 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)
diff --git a/Adafruit_Python_MCP3008/examples/simpletest.py b/Adafruit_Python_MCP3008/examples/simpletest.py
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index 0000000..23f9f0c
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+++ b/Adafruit_Python_MCP3008/examples/simpletest.py
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+# Simple example of reading the MCP3008 analog input channels and printing
+# them all out.
+# 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('Reading MCP3008 values, press Ctrl-C to quit...')
+# Print nice channel column headers.
+print('| {0:>4} | {1:>4} | {2:>4} | {3:>4} | {4:>4} | {5:>4} | {6:>4} | {7:>4} |'.format(*range(8)))
+print('-' * 57)
+# Main program loop.
+while True:
+    # Read all the ADC channel values in a list.
+    values = [0]*8
+    for i in range(8):
+        # The read_adc function will get the value of the specified channel (0-7).
+        values[i] = mcp.read_adc(i)
+    # Print the ADC values.
+    print('| {0:>4} | {1:>4} | {2:>4} | {3:>4} | {4:>4} | {5:>4} | {6:>4} | {7:>4} |'.format(*values))
+    # Pause for half a second.
+    time.sleep(0.5)