def find_vec_usb_footpedal():
all_hids = hid.find_all_hid_devices()
for index, device in enumerate(all_hids):
if (device.vendor_id == 0x05f3 and device.product_id == 0x00ff):
print("Found VEC USB Footpedal")
return all_hids[index]
raise Exception("VEC USB Footpedal not found");
if __name__ == '__main__':
try:
footpedal = find_vec_usb_footpedal()
# When starting the application, we default the instrument to the first
# instrument in the global 'instruments' list
current_instrument = instruments[selected_instrument_index]
current_instrument.acquire()
thread = Thread(target=background_worker, args=(current_instrument,))
thread.start()
footpedal.open()
footpedal.set_raw_data_handler(footpedal_handler)
print("\nWaiting for data...\nPress any (system keyboard) key to stop...")
while not kbhit() and footpedal.is_plugged():
#just keep the device opened to receive events
sleep(0.5)
finally:
footpedal.close()
virtualbench.release()
# Read the data by first querying how big the data needs to be, allocating the memory, and finally performing the read.
analog_data, analog_data_stride, analog_t0, digital_data, digital_timestamps, digital_t0, trigger_timestamp, trigger_reason = mso.read_analog_digital_u64(
)
# Finally, print some information about the data.
print("Trigger Reason: %s" % trigger_reason)
trigger_timestamp_seconds_since_1970, trigger_timestamp_fractional_seconds = virtualbench.convert_timestamp_to_values(
trigger_timestamp)
print("Trigger Timestamp: %s UTC\n\t%f fractional seconds" %
(datetime.utcfromtimestamp(trigger_timestamp_seconds_since_1970),
trigger_timestamp_fractional_seconds))
if (len(analog_data) != 0):
print("Analog t0 is %f seconds before trigger" %
get_timestamp_difference(trigger_timestamp, analog_t0))
if (len(digital_data) != 0):
print("Digital t0 is %f seconds before trigger" %
get_timestamp_difference(trigger_timestamp, digital_t0))
print_analog_data(analog_data, analog_data_stride, number_of_channels,
sampling_mode, 10)
print_digital_data(digital_data, digital_timestamps, 10)
mso.release()
except PyVirtualBenchException as e:
print("Error/Warning %d occurred\n%s" % (e.status, e))
finally:
virtualbench.release()
