python: navio: Navio: add ADC Navio+ support

Make ADC module for Navio+ and add this module in __init__ file

Python/navio/Navio/ADC.py

@@ -0,0 +1,36 @@
+from adafruit_ads1x15 import ADS1x15
+
+class ADC():
+ ADS1015 = 0x00 # 12-bit ADC
+ ADS1115 = 0x01 # 16-bit ADC
+
+ # Select the gain
+ # gain = 6144 # +/- 6.144V
+ gain = 4096 # +/- 4.096V
+ # gain = 2048 # +/- 2.048V
+ # gain = 1024 # +/- 1.024V
+ # gain = 512 # +/- 0.512V
+ # gain = 256 # +/- 0.256V
+
+ # Select the sample rate
+ # sps = 8 # 8 samples per second
+ # sps = 16 # 16 samples per second
+ # sps = 32 # 32 samples per second
+ # sps = 64 # 64 samples per second
+ # sps = 128 # 128 samples per second
+ sps = 250 # 250 samples per second
+ # sps = 475 # 475 samples per second
+ # sps = 860 # 860 samples per second
+
+ # Initialise the ADC using the default mode (use default I2C address)
+ # Set this to ADS1015 or ADS1115 depending on the ADC you are using!
+
+ channel_count = 4
+
+ def __init__(self):
+ self.adc = ADS1x15(ic=self.ADS1115)
+
+ def read(self, ch):
+ return self.adc.readADCSingleEnded(ch, self.gain, self.sps)
+
+

Python/navio/Navio/__init__.py

@@ -1,2 +1,3 @@
 from .adafruit_ads1x15 import ADS1x15
 from .Led import Led
+from .ADC import ADC