Finished HDC1000 chip program

modules/i2c.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python
+
+# Contributed by Raju and updated by Jim
+# 
+# Use:
+# import i2c 
+# device = i2c.IIC(<device i2c address 7 bit>,<Bus number>)
+# example
+# dev = i2c.IIC(0x32,1)
+# dev.i2c([10,1,0,1],1) # sends bytes 10,1,0,1 and returns 1 byte
+# dev.close()
+#
+import io
+import fcntl
+
+# i2c.py
+# 2016-03-14
+# Public Domain
+
+I2C_SLAVE=0x0703
+
+# Based on 'notSMB' for an easier way to access the i2c bus using just one
+# function. The main difference between this and notSMB is that the bus
+# here will be dedicated to 1 device address
+class IIC:
+   def __init__(self, device, bus):
+
+      self.fr = io.open("/dev/i2c-"+str(bus), "rb", buffering=0)
+      self.fw = io.open("/dev/i2c-"+str(bus), "wb", buffering=0)
+
+      # set device address
+
+      fcntl.ioctl(self.fr, I2C_SLAVE, device)
+      fcntl.ioctl(self.fw, I2C_SLAVE, device)
+
+   def write(self, data):
+      if type(data) is list:
+         data = bytes(data)
+      self.fw.write(data)
+
+   def read(self, count):
+      s = ''
+      l = []
+      s = self.fr.read(count)
+      return s
+      #if len(s) != 0:
+      #         for n in s:
+      #            l.append(rd(n))
+      #      return l
+    
+
+   def close(self):
+      self.fw.close()
+      self.fr.close()
+      
+   def i2c(self,listin,nout):
+       self.write(bytearray(listin))
+       rv = 0
+       if nout != 0:
+           rv = self.read(nout)
+       return rv    
+