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23 changes: 23 additions & 0 deletions examples/niscope/niscope_configured_acquisition/README.md
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Prerequisites
===============
Requires a Physical or Simulated Device. Refer to the [Getting Started Section](https://github.com/ni/nidaqmx-python/blob/master/README.rst) to learn how to create a simulated device. This example uses NI oscilloscopes and digitizers like the NI PXIe-5114

## Sample

This is an nipanel example that displays an interactive Streamlit app and updates and fetches data from an NI device.

### Feature

Script demonstrates waveform data getting continuously acquired and being converted to binary data.
- Supports various data types

### Required Software

- Python 3.9 or later

### Usage

```pwsh
poetry install --with examples
poetry run examples\niscope\niscope_configured_acquisition\niscope_configured_acquisition.py
```
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"""Continuously acquires waveforms from NI-SCOPE, processes/scales them."""

import time
from pathlib import Path

import hightime
import niscope
import numpy as np
from niscope.errors import Error

import nipanel

panel_script_path = Path(__file__).with_name("niscope_configured_acquisition_panel.py")
panel = nipanel.create_streamlit_panel(panel_script_path)

panel.set_value("is_running", False)
panel.set_value("run_button", False)

try:
panel.set_value("scope_error", "")
print(f"Panel URL: {panel.panel_url}")
print(f"Waiting for the 'Run' button to be pressed...")
print(f"(Press Ctrl + C to quit)")
while True:
panel.set_value("run_button", False)
while not panel.get_value("run_button", False):
time.sleep(0.1)
with niscope.Session(resource_name=panel.get_value("resource_name", "Dev1")) as session:
session.configure_vertical(
range=panel.get_value("vertical_range", 5.0),
coupling=niscope.VerticalCoupling.DC,
offset=panel.get_value("vertical_offset", 0.0),
)
session.configure_chan_characteristics(
input_impedance=panel.get_value("input_impedance", 1.0e6),
max_input_frequency=panel.get_value("max_input_frequency", 100.0e6),
)
session.configure_horizontal_timing(
min_sample_rate=panel.get_value("min_sample_rate", 10.0e6),
min_num_pts=panel.get_value("min_record_length", 1000),
ref_position=panel.get_value("ref_position", 0.0),
num_records=1000,
enforce_realtime=panel.get_value("enforce_realtime", True),
)
trigger_type = int(panel.get_value("trigger_type", "1"))
if trigger_type == 1:
immediate = session.configure_trigger_immediate()
elif trigger_type == 2:
edge = session.configure_trigger_edge(
trigger_source=str(panel.get_value("edge_source", 0)),
level=panel.get_value("edge_level", 0.0),
slope=panel.get_value("edge_slope", niscope.TriggerSlope.POSITIVE),
trigger_coupling=panel.get_value("edge_coupling", niscope.TriggerCoupling.DC),
delay=hightime.timedelta(seconds=panel.get_value("digital_delay", 0.0)),
)
elif trigger_type == 3:
digital = session.configure_trigger_digital(
trigger_source=panel.get_value("digital_source", "PFI 1"),
slope=panel.get_value("digital_slope", niscope.TriggerSlope.POSITIVE),
delay=hightime.timedelta(seconds=panel.get_value("digital_delay", 0.0)),
)
elif trigger_type == 4:
window = session.configure_trigger_window(
trigger_source=str(panel.get_value("window_source", 0)),
window_mode=panel.get_value("window_mode", niscope.TriggerWindowMode.ENTERING),
low_level=panel.get_value("window_low_level", -0.1),
high_level=panel.get_value("window_high_level", 0.1),
trigger_coupling=panel.get_value("window_coupling", niscope.TriggerCoupling.DC),
delay=hightime.timedelta(seconds=panel.get_value("digital_delay", 0.0)),
)
else:
hysteresis = session.configure_trigger_hysteresis(
trigger_source=str(panel.get_value("hysteresis_source", 0)),
level=panel.get_value("hysteresis_level", 0.0),
hysteresis=panel.get_value("hysteresis", 0.05),
slope=panel.get_value("hysteresis_slope", niscope.TriggerSlope.POSITIVE),
trigger_coupling=panel.get_value(
"hysteresis_coupling", niscope.TriggerCoupling.DC
),
delay=hightime.timedelta(seconds=panel.get_value("digital_delay", 0.0)),
)

with session.initiate():
wfm = np.array(
session.channels[panel.get_value("channel_number", 0)].fetch(
num_samples=1000,
num_records=1000,
relative_to=niscope.FetchRelativeTo.READ_POINTER,
offset=0,
timeout=hightime.timedelta(seconds=panel.get_value("timeout", 5.0)),
)
)
try:
panel.set_value("is_running", True)

panel.set_value("stop_button", False)
while not panel.get_value("stop_button", False):

for i in range(len(wfm)):
if panel.get_value("stop_button", True):
break
else:
data = wfm[i].samples.tolist()
panel.set_value("waveform_data", data)
panel.set_value("actual_record_length", session.horz_record_length)
panel.set_value("actual_sample_rate", session.samp_clk_timebase_rate)
panel.set_value("auto_triggered", session.trigger_auto_triggered)
except KeyboardInterrupt:
pass
finally:
panel.set_value("is_running", False)

except Error as e:
scope_error = str(e)
print(scope_error)
panel.set_value("scope_error", scope_error)

except KeyboardInterrupt:
pass
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