try:
a_seconds_since_1970, a_fractional_seconds = virtualbench.convert_timestamp_to_values(
a_timestamp)
b_seconds_since_1970, b_fractional_seconds = virtualbench.convert_timestamp_to_values(
b_timestamp)
return (a_seconds_since_1970 - b_seconds_since_1970
) + a_fractional_seconds - b_fractional_seconds
except PyVirtualBenchException as e:
return 0.0
try:
# You will probably need to replace "myVirtualBench" with the name of your device.
# By default, the device name is the model number and serial number separated by a hyphen; e.g., "VB8012-309738A".
# You can see the device's name in the VirtualBench Application under File->About
virtualbench = PyVirtualBench('myVirtualBench')
mso = virtualbench.acquire_mixed_signal_oscilloscope()
# Configure the acquisition using auto setup
mso.auto_setup()
# Query the configuration that was chosen to properly interpret the data.
sample_rate, acquisition_time, pretrigger_time, sampling_mode = mso.query_timing(
)
channels = mso.query_enabled_analog_channels()
channels_enabled, number_of_channels = virtualbench.collapse_channel_string(
channels)
# Start the acquisition. Auto triggering is enabled to catch a misconfigured trigger condition.
mso.run()
# Channel Configuration
clock_rate = I2cClockRate.ONE_HUNDRED_KHZ # 100kHz
# You will probably need to replace "0x50" address with the address for your
# attached chip. You can find the address by looking at the datasheet for
# your attached chip.
address = 0x50
address_size = I2cAddressSize.SEVEN_BITS
enable_pullups = False
# Data
data_to_write = [ 0, 1, 2, 3, 4, 5, 6, 7 ]
data_read_size = len(data_to_write)
timeout = 10.0
virtualbench = PyVirtualBench()
i2c = virtualbench.acquire_inter_integrated_circuit(bus)
i2c.configure_bus(clock_rate, address, address_size, enable_pullups)
# Write and read from the bus.
for i in range(10):
data_read, number_of_bytes_written = i2c.write_read(data_to_write, timeout, data_read_size)
print("Iteration %d:" % i)
print("Wrote %d bytes" % number_of_bytes_written)
for i in range(number_of_bytes_written): print("0x%02x" % data_to_write[i])
print("Read %d bytes" % len(data_read))
for i in range(len(data_read)): print("0x%02x" % data_read[i])
