Compoartmentalzation of the init proccess

in order to make the start-up code less messy all parts of startup is
devided into its own funciontion

sgptest.py

@@ -11,6 +11,7 @@ import os.path
 
 DEVICE_BUS = 1
 DEVICE_ADDR = 0x58
+BASELINE_FILENAME = os.path.expanduser("~/sgp_config_data.txt")
 #print bus.write_byte_datadata(DEVICE_ADDR, 0x00, 0x01)
 #self._i2c_read_words_from_cmd([0x36, 0x82], 0.01, 3)
 
@@ -36,8 +37,42 @@ def read_write(cmd,bus,addr=DEVICE_ADDR):
         bus.i2c_rdwr(read)
         r = list(read)
         answer = [i<<8 | j for i,j in zip(r[0::3],r[1::3])]
-        return answer
-    
+        return Sgp30Answer(answer,r)
+
+def try_set_baseline():
+    try:
+        with open(BASELINE_FILENAME,"w") as conf:
+            baseline=json.load(conf)
+            baseline_cmd = copy(SET_BASELINE)
+            baseline_cmd.commands += baseline
+    except IOError:
+        pass
+    except ValueError:
+        pass
+    else:
+        if len(baseline) == 6:
+            print("Loading baseline data into sensor")
+            rw(baseline_cmd)
+
+def init_sgp(bus):
+    print("Initializing SGP30")
+    rw(IAQ_INIT)
+    print("Waiting for sensor warmup")
+    try_set_baseline()
+    #print(rw(SET_BASELINE))
+    sleep(15)
+
+def i2c_geral_call(bus):
+    print("resetting bus")
+    bus.write_byte(0,0x06)
+    sleep(.1)
+
+def store_baseline(n):
+    if (n > 3600 * 12) and (n % 3600 == 3599):
+        with open(BASELINE_FILENAME,"w") as conf:
+            baseline= rw(GET_BASELINE)
+            json.dump(baseline.raw,conf)
+
 with SMBusWrapper(1) as bus:
     rw=partial(read_write,bus=bus)
     print(rw(GET_FEATURES))