def search_bus(self, broadcast=False):
""" Initialize bus with broadcast on or off and find the devices from the bus
"""
addrs = self.unused_addresses()
i = self.get_interface()
i.send(gear.Terminate())
i.send(gear.Initialise(broadcast=broadcast, address=None))
i.send(gear.Randomise())
# Randomise may take up to 100ms
time.sleep(0.1)
low = 0
high = 0xffffff
while low is not None:
low = self.find_next(low, high)
if low is not None:
if addrs:
new_addr = addrs.pop(0)
i.send(gear.ProgramShortAddress(new_addr))
r = i.send(gear.VerifyShortAddress(new_addr))
if r.value is not True:
print(f"Error in programming short address {new_addr}")
i.send(gear.Withdraw())
Device(address=new_addr, randomAddress=low, bus=self)
else:
i.send(gear.Terminate())
print("No free address")
low = low + 1
i.send(gear.Terminate())
def assign_short_addresses(self):
"""Search for devices on the bus with no short address allocated, and
allocate each one a short address from the set of unused
addresses.
"""
if not self._bus_scanned:
self.scan()
addrs = self.unused_addresses()
i = self.get_interface()
i.send(gear.Terminate())
i.send(gear.Initialise(broadcast=False, address=None))
i.send(gear.Randomise())
# Randomise may take up to 100ms
time.sleep(0.1)
low = 0
high = 0xffffff
while low is not None:
low = self.find_next(low, high)
if low is not None:
if addrs:
new_addr = addrs.pop(0)
i.send(gear.ProgramShortAddress(new_addr))
r = i.send(gear.VerifyShortAddress(new_addr))
if r.value is not True:
raise ProgramShortAddressFailure(new_addr)
i.send(gear.Withdraw())
device.Device(address=new_addr, bus=self)
else:
i.send(gear.Terminate())
raise NoFreeAddress
low = low + 1
i.send(gear.Terminate())