Finished HDC1000 chip program

modules/hdc1000.py

@@ -3,10 +3,7 @@
 
 import time
 from pprint import pprint
-try:
-	import smbus2 as smbus
-except ImportError:
-	import smbus
+import i2c
 
 I2CADDR			= 0x40
 
@@ -14,7 +11,7 @@ TEMP_REG		= 0x00
 HUMID_REG		= 0x01
 CONFIG_REG		= 0x02
 
-CONFIG_RST		= (1 << 15)
+CONFIG_RESET		= (1 << 15)
 CONFIG_HEAT		= (1 << 13)
 CONFIG_MODE_SINGLE	= 0
 CONFIG_MODE_BOTH	= (1 << 12)
@@ -31,74 +28,55 @@ SERIAL3			= 0xFD
 MANUFID			= 0xFE
 DEVICEID		= 0xFF
 
-try:
-	bus = smbus.SMBus(1)
-except:
-	print("No I2C bus found.")
+bus = i2c.IIC(I2CADDR, 1)
 
-def reset():
+def reset(extra = 0):
 	config = (
-		CONFIG_RST |
-		CONFIG_MODE_BOTH |
+		CONFIG_RESET |
+		CONFIG_MODE_SINGLE |
 		CONFIG_TRES_14 |
-		CONFIG_HRES_14
+		CONFIG_HRES_14 |
+		extra
 	)
-	bus.write_word_data(I2CADDR, CONFIG_REG, config)
+	bus.i2c([CONFIG_REG, config >> 8], 0)
 
-def readSensors():
-	bus.write_byte(I2CADDR, TEMP_REG)
+def temperature():
+	# Request temperature measurement
+	bus.i2c([TEMP_REG], 0)
 
-	time.sleep(0.05)
+	time.sleep(0.2)
 
-	temp = bus.read_byte(I2CADDR)
-	temp << 8
-	temp |= bus.read_byte(I2CADDR)
+	data = bus.read(2)
+	temp = (data[0] << 8) | data[1]
+	#print(hex(temp))
+	return (temp / 65536.0) * 165.0 - 40
 
-	hum = bus.read_byte(I2CADDR)
-	hum << 8
-	hum |= bus.read_byte(I2CADDR)
+def humidity():
+	# Request humidity measurement
+	bus.i2c([HUMID_REG], 0)
 
-	print(hex(temp))
-	print(hex(hum))
+	time.sleep(0.2)
 
-	#float temp = (read32(HDC1000_TEMP, 20) >> 16);
-	#temp /= 65536;
-	#temp *= 165;
-	#temp -= 40;
-
-	#float hum = (read32(HDC1000_TEMP, 20) & 0xFFFF);
-	#hum /= 65536;
-	#hum *= 100;
-
-	#return hum;
+	data = bus.read(2)
+	hum = (data[0] << 8) | data[1]
+	#print(hex(hum))
+	return (hum / 65536.0) * 100.0
 
 def drySensor():
-	origconfig = bus.read_word_data(I2CADDR, CONFIG_REG)
-	newconfig = (
-		CONFIG_RST |
-		CONFIG_HEAT |
-		CONFIG_MODE_BOTH |
-		CONFIG_TRES_14 |
-		CONFIG_HRES_14
-	)
+	# Turn on the heater
+	reset(CONFIG_HEAT)
 
-	bus.write_word_data(I2CADDR, CONFIG_REG, newconfig)
+	# Take 1000 reading as fast as possible
+	# (the heater is only activated when performing a reading)
+	for x in range(10000):
+		try:
+			temperature()
+			time.sleep(0.1)
+		except: pass
 
-	sleep(0.1)
-
-	# Take 1000 readings
-	for x in range(0, 1000):
-		triggerMeasurements()
-		sleep(0.1)
-
-	sleep(0.1)
-
-	origconfig |= CONFIG_RST;
-	bus.write_word_data(I2CADDR, CONFIG_REG, origconfig)
+	# Turn off the heater
+	reset()
 
 def init():
 	reset()
-	manuf = bus.read_word_data(I2CADDR, MANUFID)
-	dev = bus.read_word_data(I2CADDR, DEVICEID)
-	print("Manufacturer:", manuf, "Device:", dev)
 

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    
+

modules/testhdc1000.py

@@ -0,0 +1,57 @@
+#stributed with a free-will license.
+# Use it any way you want, profit or free, provided it fits in the licenses of its associated works.
+# HDC1000
+# This code is designed to work with the HDC1000_I2CS I2C Mini Module available from ControlEverything.com.
+# https://www.controleverything.com/content/Temperature?sku=HDC1000_I2CS#tabs-0-product_tabset-2
+
+import smbus
+import time
+
+# Get I2C bus
+bus = smbus.SMBus(1)
+
+# HDC1000 address, 0x40(64)
+# Select configuration register, 0x02(02)
+#		0x30(48)	Temperature, Humidity enabled, Resolultion = 14-bits, Heater on
+bus.write_byte_data(0x40, 0x02, 0x30)
+
+# HDC1000 address, 0x40(64)
+# Send temp measurement command, 0x00(00)
+bus.write_byte(0x40, 0x00)
+
+time.sleep(0.5)
+
+# HDC1000 address, 0x40(64)
+# Read data back, 2 bytes
+# temp MSB, temp LSB
+data0 = bus.read_byte(0x40)
+data1 = bus.read_byte(0x40)
+
+# Convert the data
+temp = (data0 * 256) + data1
+print(hex(temp))
+cTemp = (temp / 65536.0) * 165.0 - 40
+fTemp = cTemp * 1.8 + 32
+
+# HDC1000 address, 0x40(64)
+# Send humidity measurement command, 0x01(01)
+bus.write_byte(0x40, 0x01)
+
+time.sleep(0.5)
+
+# HDC1000 address, 0x40(64)
+# Read data back, 2 bytes
+# humidity MSB, humidity LSB
+data0 = bus.read_byte(0x40)
+data1 = bus.read_byte(0x40)
+
+# Convert the data
+humidity = (data0 * 256) + data1
+print(hex(humidity))
+humidity = (humidity / 65536.0) * 100.0
+
+# Output data to screen
+print "Relative Humidity : %.2f %%" %humidity
+print "Temperature in Celsius : %.2f C" %cTemp
+print "Temperature in Fahrenheit : %.2f F" %fTemp
+

testprograms/camera/oneshot

@@ -0,0 +1,11 @@
+#!/usr/bin/python3
+from picamera import PiCamera
+from time import sleep
+
+camera = PiCamera()
+
+camera.start_preview()
+sleep(5)
+camera.capture('/home/pi/camera/pics/image.jpg')
+camera.stop_preview()
+

testprograms/camera/preview

@@ -0,0 +1,11 @@
+#!/usr/bin/python3
+
+from picamera import PiCamera
+from time import sleep
+
+camera = PiCamera()
+
+camera.start_preview()
+sleep(10)
+camera.stop_preview()
+