def _setup_timer(self):
e = Event()
result = [None]
def timer_handler(ctx, pointer):
result[0] = RuntimeError("Could not create timer") if pointer == None else pointer
e.set()
fn_wrapper = FnVoid_VoidP_VoidP(timer_handler)
libmetawear.mbl_mw_timer_create_indefinite(self.device.board, 1000, 0, None, fn_wrapper)
e.wait()
if (result[0] is RuntimeError):
raise result[0]
return result[0]
def createTimer(mmr):
mmr.parameters = I2cReadParameters(device_addr=AD7745_ADDR,
register_addr=REG_CAP_DATA)
e = Event()
mmr.timer = create_voidp(
lambda fn: libmetawear.mbl_mw_timer_create_indefinite(
mmr.device.board, 11, 0, None, fn),
resource="timer",
event=e)
libmetawear.mbl_mw_event_record_commands(mmr.timer)
libmetawear.mbl_mw_datasignal_read_with_parameters(mmr.i2c_signal,
byref(mmr.parameters))
create_voidp_int(
lambda fn: libmetawear.mbl_mw_event_end_record(mmr.timer, None, fn),
event=e)
print(mmr.timer)
mmr.timer_id = libmetawear.mbl_mw_timer_get_id(mmr.timer)
print("id" + str(mmr.timer_id))
print("Searching for device...")
d = MetaWear(sys.argv[1])
d.connect()
print("Connected to " + d.address)
try:
# setup events
e = Event()
print("Configuring device")
# get temp signal and setup logger
signal = libmetawear.mbl_mw_multi_chnl_temp_get_temperature_data_signal(d.board, MetaWearRProChannel.ON_BOARD_THERMISTOR)
logger = create_voidp(lambda fn: libmetawear.mbl_mw_datasignal_log(signal, None, fn), resource = "temp_logger", event = e)
# create a timer
timer = create_voidp(lambda fn: libmetawear.mbl_mw_timer_create_indefinite(d.board, 1000, 0, None, fn), resource = "timer", event = e)
# record an event
libmetawear.mbl_mw_event_record_commands(timer)
# event is to read temp signal
libmetawear.mbl_mw_datasignal_read(signal)
create_voidp_int(lambda fn: libmetawear.mbl_mw_event_end_record(timer, None, fn), event = e)
# start logging
libmetawear.mbl_mw_logging_start(d.board, 0)
# start timer
libmetawear.mbl_mw_timer_start(timer)
# log 10s
e = Event()
# create callback
callback = FnVoid_VoidP_DataP(lambda ctx, p: print("{epoch: %d, value: %s}" % (
p.contents.epoch, parse_value(p))))
# get temp signal
print("Configuring device")
signal = libmetawear.mbl_mw_multi_chnl_temp_get_temperature_data_signal(
d.board, MetaWearRProChannel.ON_BOARD_THERMISTOR)
# subscribe to temp signal
libmetawear.mbl_mw_datasignal_subscribe(signal, None, callback)
# create timer - fires ever 1000ms
timer = create_voidp(lambda fn: libmetawear.mbl_mw_timer_create_indefinite(
d.board, 1000, 0, None, fn),
resource="timer",
event=e)
# create event based on timer - read temp when timer fires
libmetawear.mbl_mw_event_record_commands(timer)
libmetawear.mbl_mw_datasignal_read(signal)
create_voidp_int(
lambda fn: libmetawear.mbl_mw_event_end_record(timer, None, fn), event=e)
# start timer
libmetawear.mbl_mw_timer_start(timer)
# wait 5s
print("Stream temp data for 5s")
sleep(5.0)
def timer_setup(device):
# Setup timer to read battery level
libmetawear.mbl_mw_timer_create_indefinite(device.board, 5000, 0,
timer_created_fn)