Added NIScope EX Fetch Forever

examples/nidaqmx/README.md

@@ -16,5 +16,5 @@ This is a nipanel example that displays an interactive Streamlit app and updates
 
 ### Usage
 
-Run `poetry run examples/nidaqmx_continuous_analog_input/nidaqmx_continuous_analog_input.py`
+Run `poetry run examples/nidaqmx/nidaqmx_continuous_analog_input.py`
 

examples/nidaqmx/nidaqmx_continuous_analog_input_panel.py

@@ -24,10 +24,11 @@
 thermocouple_data = panel.get_value("thermocouple_data", [0.0])
 voltage_data = panel.get_value("voltage_data", [0.0])
 
-sample_rate = panel.get_value("sample_rate", 0)
+sample_rate = panel.get_value("sample_rate", 0.0)
 
 st.header("Voltage & Thermocouple")
 voltage_therm_graph = {
+    "animation": False,
     "tooltip": {"trigger": "axis"},
     "legend": {"data": ["Voltage (V)", "Temperature (C)"]},
     "xAxis": {
@@ -64,7 +65,7 @@
         },
     ],
 }
-st_echarts(options=voltage_therm_graph, height="400px")
+st_echarts(options=voltage_therm_graph, height="400px", key="graph")
 
 voltage_tab.header("Voltage")
 with voltage_tab:

examples/niscope/README.md

@@ -0,0 +1,20 @@
+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/digitizers, which have the module numbering pattern _51xx_. One example is NI PXIe-5114.
+## Sample
+
+This is a nipanel example that displays an interactive Streamlit app and updates and fetches data from device.
+
+### Feature
+
+Script demonstrates NIScope waveform data getting continuously acquired. 
+- Supports various data types
+
+### Required Software
+
+- Python 3.9 or later
+
+### Usage
+
+Run `poetry run examples/niscope/niscope_ex_fetch_forever.py`
+

examples/niscope/niscope_ex_fetch_forever.py

@@ -0,0 +1,61 @@
+"""Continuously acquires waveforms from NI-SCOPE, processes/scales them."""
+
+import time
+from pathlib import Path
+from typing import Any
+
+import hightime
+import niscope
+import numpy as np
+
+import nipanel
+
+panel_script_path = Path(__file__).with_name("niscope_ex_fetch_forever_panel.py")
+panel = nipanel.create_panel(panel_script_path)
+
+print(f"Panel URL: {panel.panel_url}")
+
+resource_name = "Dev1"
+channels = 0
+options = ""
+length = 1000
+samples_per_fetch = 1000
+
+"""Example fetch data from device (Dev1)."""
+with niscope.Session(resource_name=resource_name, options=options) as session:
+    session.configure_vertical(range=2, coupling=niscope.VerticalCoupling.DC, enabled=True)
+    session.configure_horizontal_timing(
+        min_sample_rate=100000000,
+        min_num_pts=1000,
+        ref_position=50.0,
+        num_records=1000,
+        enforce_realtime=True,
+    )
+    session.configure_trigger_software()
+
+    with session.initiate():
+        wfm: np.ndarray[Any, np.dtype[np.int8]] = np.ndarray(
+            length * samples_per_fetch, dtype=np.int8
+        )
+        waveforms = session.channels[channels].fetch_into(
+            relative_to=niscope.FetchRelativeTo.READ_POINTER,
+            offset=0,
+            timeout=hightime.timedelta(seconds=5.0),
+            waveform=wfm,
+        )
+        try:
+            print(f"Press Ctrl + C to stop")
+            while True:
+                offset =session.meas_array_offset
+                gain = session.meas_array_gain
+                for i in range(len(waveforms)):
+                    time.sleep(0.2)
+                    amplitude_list = []
+                    total_data = waveforms[i].samples.tolist()
+                    for amplitude in total_data:
+                        amplitude = (amplitude * 10) * gain + offset
+                        amplitude_list.append(amplitude)
+                    panel.set_value("Waveform", amplitude_list)
+
+        except KeyboardInterrupt:
+            pass

examples/niscope/niscope_ex_fetch_forever_panel.py

@@ -0,0 +1,44 @@
+"""Streamlit dashboard for visualizing NI-SCOPE waveform data in real time."""
+
+import streamlit as st
+from streamlit_echarts import st_echarts
+
+import nipanel
+
+st.set_page_config(page_title="NI-SCOPE Example", page_icon="📈", layout="wide")
+st.title("NIScope EX Fetch Forever")
+
+panel = nipanel.get_panel_accessor()
+
+waveform = panel.get_value("Waveform", [0])
+
+graph = {
+    "animation": False,
+    "tooltip": {"trigger": "axis"},
+    "legend": {"data": ["Amplitude (V)"]},
+    "xAxis": {
+        "type": "category",
+        "data": list(range(len(waveform))),
+        "name": "Samples",
+        "nameLocation": "center",
+        "nameGap": 40,
+    },
+    "yAxis": {
+        "type": "value",
+        "name": "Amplitude(V)",
+        "nameRotate": 90,
+        "nameLocation": "center",
+        "nameGap": 40,
+    },
+    "series": [
+        {
+            "name": "niscope data",
+            "type": "line",
+            "data": waveform,
+            "emphasis": {"focus": "series"},
+            "smooth": True,
+            "seriesLayoutBy": "row",
+        },
+    ],
+}
+st_echarts(options=graph, height="400px", width="75%", key="graph")