fix a couple of bugs in beaglebone detection; tested for BBB

...unfortunately, requires root as-written, which probably makes
this a lot less useful.

Author: brennen

adafruit_platformdetect/board.py

@@ -178,19 +178,18 @@ def _pi_rev_code(self):
             return None
         return self.detector.get_cpuinfo_field('Revision')
 
-    @property
     def _beaglebone_id(self):
         """Try to detect id of a Beaglebone."""
         try:
             with open("/sys/bus/nvmem/devices/0-00500/nvmem", "rb") as eeprom:
                 eeprom_bytes = eeprom.read(16)
-        except:
+        except FileNotFoundError:
             return None
 
         if eeprom_bytes[:4] != b'\xaaU3\xee':
             return None
 
-        id_string = str(eeprom_bytes[4:])
+        id_string = eeprom_bytes[4:].decode("ascii")
         for model, ids in _BEAGLEBONE_BOARD_IDS.items():
             for id in ids:
                 if id_string == id[1]:

adafruit_platformdetect/chip.py

@@ -33,9 +33,9 @@ def _linux_id(self):
         hardware = self.detector.get_cpuinfo_field("Hardware")
         if hardware in ('BCM2708', 'BCM2708', 'BCM2835'):
             id = BCM2XXX
-        elif "AM33XX" in hardwarename:
+        elif "AM33XX" in hardware:
             id = AM33XX
-        elif "sun8i" in hardwarename:
+        elif "sun8i" in hardware:
             id = SUN8I
 
         return id

bin/detect.py

@@ -15,5 +15,5 @@
     print("Raspberry Pi detected.")
     print("Revision code: ", detector.board._pi_rev_code())
 
-if detector.board.beaglebone_black:
+if detector.board.BEAGLEBONE_BLACK:
     print("BBB detected")