diff options
Diffstat (limited to 'drivers/onewire/onewire.py')
| -rw-r--r-- | drivers/onewire/onewire.py | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/onewire/onewire.py b/drivers/onewire/onewire.py index 3309ba0d2..dd8c274fc 100644 --- a/drivers/onewire/onewire.py +++ b/drivers/onewire/onewire.py @@ -4,13 +4,15 @@ from micropython import const import _onewire as _ow + class OneWireError(Exception): pass + class OneWire: - SEARCH_ROM = const(0xf0) + SEARCH_ROM = const(0xF0) MATCH_ROM = const(0x55) - SKIP_ROM = const(0xcc) + SKIP_ROM = const(0xCC) def __init__(self, pin): self.pin = pin @@ -51,7 +53,7 @@ class OneWire: devices = [] diff = 65 rom = False - for i in range(0xff): + for i in range(0xFF): rom, diff = self._search_rom(rom, diff) if rom: devices += [rom] @@ -73,10 +75,10 @@ class OneWire: for bit in range(8): b = self.readbit() if self.readbit(): - if b: # there are no devices or there is an error on the bus + if b: # there are no devices or there is an error on the bus return None, 0 else: - if not b: # collision, two devices with different bit meaning + if not b: # collision, two devices with different bit meaning if diff > i or ((l_rom[byte] & (1 << bit)) and diff != i): b = 1 next_diff = i |