def accelerometer(i2c):
bma = bma42x.BMA42X(i2c)
accel_conf = {}
bma.init()
# There is no hardware reset capability so issue a software reset
# instead.
bma.set_command_register(0xb6)
time.sleep(0.20)
# Upload the configuration file to enable the features of the sensor.
bma.write_config_file()
# Enable the accelerometer
bma.set_accel_enable(True)
# Accelerometer Configuration Setting
# Output data Rate
accel_conf['odr'] = bma42x.OUTPUT_DATA_RATE_100HZ
# Gravity range of the sensor (+/- 2G, 4G, 8G, 16G)
accel_conf['range'] = bma42x.ACCEL_RANGE_2G
# Bandwidth configure number of sensor samples required to average
# if value = 2, then 4 samples are averaged
# averaged samples = 2^(val(accel bandwidth))
# Note1 : More info refer datasheets
# Note2 : A higher number of averaged samples will result in a lower noise
# level of the signal, but since the performance power mode phase is
# increased, the power consumption will also rise.
accel_conf['bandwidth'] = bma42x.ACCEL_NORMAL_AVG4
# Enable the filter performance mode where averaging of samples
# will be done based on above set bandwidth and ODR.
# There are two modes
# 0 -> Averaging samples (Default)
# 1 -> No averaging
# For more info on No Averaging mode refer datasheets.
accel_conf['perf_mode'] = bma42x.CIC_AVG_MODE
# Set the accel configurations
bma.set_accel_config(**accel_conf)
print("Ax[m/s2], Ay[m/s2], Az[m/s2]")
for i in range(ACCEL_SAMPLE_COUNT):
(x, y, z) = bma.read_accel_xyz()
# Converting lsb to meters per seconds square for 12 bit accelerometer
# at 2G range
x = lsb_to_ms2(x, 2, 12)
y = lsb_to_ms2(y, 2, 12)
z = lsb_to_ms2(z, 2, 12)
# Print the data in m/s2/
print("{:.2f}, {:.2f}, {:.2f}".format(x, y, z))
# Pause for 10ms, 100Hz output data rate
time.sleep(0.01)
def temperature(i2c):
bma = bma42x.BMA42X(i2c)
accel_conf = {}
# Sensor initialization
bma.init()
# There is no hardware reset capability so issue a software reset
# instead.
bma.set_command_register(0xb6)
time.sleep(0.20)
# Upload the configuration file to enable the features of the sensor.
bma.write_config_file()
# Get temperature in degree C
get_temp_C = bma.get_temperature(bma42x.DEG)
# Get temperature in degree F
get_temp_F = bma.get_temperature(bma42x.FAHREN)
# Get temperature in degree K
get_temp_K = bma.get_temperature(bma42x.KELVIN)
# Scale the output to get the actual temperature
actual_temp = get_temp_C / bma42x.SCALE_TEMP
print("Actual temperature in degree celsius is {:.2f} degrees C".format(actual_temp))
actual_temp = get_temp_F / bma42x.SCALE_TEMP
print("Actual temperature in degree fahranheit is {:.2f} degrees F".format(actual_temp))
actual_temp = get_temp_K / bma42x.SCALE_TEMP
print("Actual temperature in degree kelvin is {:.2f} degrees K".format(actual_temp))
def __init__(self, i2c):
"""Configure the driver.
:param machine.I2C i2c: I2C bus used to access the sensor.
"""
self._dev = bma42x.BMA42X(i2c)
def step_counter(i2c):
bma = bma42x.BMA42X(i2c)
accel_conf = {}
bma.init()
# There is no hardware reset capability so issue a software reset
# instead.
bma.set_command_register(0xb6)
time.sleep(0.20)
# Upload the configuration file to enable the features of the sensor.
bma.write_config_file()
# Enable the accelerometer
bma.set_accel_enable(True)
# Accelerometer Configuration Setting
# Output data Rate
accel_conf['odr'] = bma42x.OUTPUT_DATA_RATE_100HZ
# Gravity range of the sensor (+/- 2G, 4G, 8G, 16G)
accel_conf['range'] = bma42x.ACCEL_RANGE_2G
# Bandwidth configure number of sensor samples required to average
# if value = 2, then 4 samples are averaged
# averaged samples = 2^(val(accel bandwidth))
# Note1 : More info refer datasheets
# Note2 : A higher number of averaged samples will result in a lower noise
# level of the signal, but since the performance power mode phase is
# increased, the power consumption will also rise.
accel_conf['bandwidth'] = bma42x.ACCEL_NORMAL_AVG4
# Enable the filter performance mode where averaging of samples
# will be done based on above set bandwidth and ODR.
# There are two modes
# 0 -> Averaging samples (Default)
# 1 -> No averaging
# For more info on No Averaging mode refer datasheets.
accel_conf['perf_mode'] = bma42x.CIC_AVG_MODE
# Set the accel configurations
bma.set_accel_config(**accel_conf)
# Enable step counter
bma.feature_enable(bma42x.STEP_CNTR, True)
# Map the interrupt pin with that of step counter interrupts
# Interrupt will be generated when step activity is generated.
bma.map_interrupt(bma42x.INTR1_MAP, bma42x.STEP_CNTR_INT, True)
# Set water-mark level 1 to get interrupt after 20 steps.
# Range of step counter interrupt is 0 to 20460(resolution of 20 steps).
bma.step_counter_set_watermark(1)
print("Move/perform the walk/step action with the sensor")
while True:
# Read the interrupt register to check whether step counter interrupt is
# received
int_status = bma.read_int_status()
# Check if step counter interrupt is triggered
if int_status & bma42x.STEP_CNTR_INT:
print("Step counter interrupt received")
# On interrupt, Get step counter output
step_out = bma.step_counter_output()
break
print("The step counter output is {}".format(step_out))