code added

.gitignore

@@ -0,0 +1,109 @@
+# Created by .ignore support plugin (hsz.mobi)
+### Python template
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+.idea/
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# pyenv
+.python-version
+
+# celery beat schedule file
+celerybeat-schedule
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+

UNITS.ini

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+## UNITS.INI
+## GEX v0.3.1 on STM32F072-ZERO
+## built May 22 2018 at 12:05:33
+
+[UNITS]
+# Create units by adding their names next to a type (e.g. DO=A,B),
+# remove the same way. Reload to update the unit sections below.
+
+# Digital output
+DO=trig
+# Digital input with triggers
+DI=
+# Neopixel RGB LED strip
+NPX=
+# I2C master
+I2C=
+# SPI master
+SPI=
+# Serial port
+USART=
+# 1-Wire master
+1WIRE=
+# Analog/digital converter
+ADC=adc
+# Shift register driver (595, 4094)
+SIPO=
+# Frequency and pulse measurement
+FCAP=
+# Capacitive touch sensing
+TOUCH=
+# Simple PWM output
+PWMDIM=
+# Two-channel analog output with waveforms
+DAC=
+
+[DO:trig@1]
+# Port name
+port=B
+# Pins (comma separated, supports ranges)
+pins=1
+# Initially high pins
+initial=
+# Open-drain pins
+open-drain=
+
+[ADC:adc@2]
+# Enabled channels, comma separated
+#  0  1  2  3  4  5  6  7    8  9   10 11 12 13 14 15   16    17
+# A0 A1 A2 A3 A4 A5 A6 A7   B0 B1   C0 C1 C2 C3 C4 C5   Tsens Vref
+channels=0-1
+
+# Sampling time (0-7)
+sample_time=2
+# Sampling frequency (Hz)
+frequency=20000
+
+# Sample buffer size
+# - shared by all enabled channels
+# - defines the maximum pre-trigger size (divide by # of channels)
+# - captured data is sent in half-buffer chunks
+# - buffer overrun aborts the data capture
+buffer_size=500
+
+# Enable continuous sampling with averaging
+# Caution: This can cause DAC output glitches
+averaging=N
+# Exponential averaging coefficient (permil, range 0-1000 ~ 0.000-1.000)
+# - used formula: y[t]=(1-k)*y[t-1]+k*u[t]
+# - not available when a capture is running
+avg_factor=500

main.py

@@ -1,52 +1,124 @@
+import time
+
 from PyQt4 import QtCore, QtGui, Qt
 from PyQt4.QtGui import QApplication, QMainWindow
 import sys, math
+import gex
 
 class MyMainScreen(QMainWindow):
-    def __init__(self, parent=None):
+    def __init__(self, client=None, parent=None):
         QtGui.QMainWindow.__init__(self, parent)
+        self.resize(800, 600)
+
+        self.samples = None
 
         self.timer  = QtCore.QTimer(self)
-        self.timer.setInterval(100)
-        self.timer.timeout.connect(self.blink)
+        self.timer.setInterval(20)
+        self.timer.timeout.connect(self.measure)
         self.timer.start()
 
-        self.resize(500, 500)
-        self.centralwidget = QtGui.QWidget(self)
-        self.horizontalLayout = QtGui.QHBoxLayout(self.centralwidget)
+        self.timer2  = QtCore.QTimer(self)
+        self.timer2.setInterval(30)
+        self.timer2.timeout.connect(self.updatedisp)
+        self.timer2.start()
 
-        self.setCentralWidget(self.centralwidget)
-        self.menubar = QtGui.QMenuBar(self)
-        self.menubar.setGeometry(QtCore.QRect(0, 0, 500, 22))
+        self.pending = False
 
-        self.setMenuBar(self.menubar)
+        # init GEX
+        self.client = client
+        self.trig = gex.DOut(client, 'trig')
+        self.adc = gex.ADC(client, 'adc')
 
-        self.statusbar = QtGui.QStatusBar(self)
-        self.setStatusBar(self.statusbar)
-        QtCore.QMetaObject.connectSlotsByName(self)
+        self.adc.set_sample_rate(75000)
 
-        self.n = 0
+        self.failcount = 0
+        self.skipcount = 0
+        self.wantredraw = False
 
-    def blink(self):
-        self.n += 0.1
-        self.n = self.n % 20
+        # self.fcap = gex.FCAP(client, 'fcap')
+
+    def closeEvent(self,event):
+        self.timer.stop()
+        self.client.close()
+        self.close()
+
+    def measure(self):
+        if self.pending:
+            self.failcount += 1
+            if self.failcount > 2:
+                self.pending = False
+                self.adc.disarm()
+                self.skipcount = 0
+            return
+
+        if self.skipcount < 5:
+            self.skipcount += 1
+            return
+        else:
+            self.skipcount = 0
+
+        self.pending = True
+
+        self.failcount = 0
+
+        self.adc.setup_trigger(1, level=1000, edge='rising', count=1000, handler=self.handle_meas)
+        self.adc.arm()
+
+        self.trig.pulse_us(10)
+
+    def handle_meas(self, report):
+        self.samples = report.data[50:]
+        self.pending = False
+        self.wantredraw = True
+
+    def updatedisp(self):
+        if self.wantredraw:
             self.repaint()
+            self.wantredraw = False
 
     def paintEvent(self, event):
+        if self.samples is None:
+            return
+
+        W = self.width()
+        H = self.height()
+
         painter = QtGui.QPainter(self)
         painter.setRenderHint(QtGui.QPainter.Antialiasing)
         painter.setRenderHint(QtGui.QPainter.HighQualityAntialiasing)
-        painter.setPen(QtGui.QPen(QtCore.Qt.red, 2))
+        painter.fillRect(0,0, W,H, QtCore.Qt.black)
+        painter.setPen(QtGui.QPen(QtCore.Qt.green, 1))
 
-        step = 2
-        amp = (self.height()/2)*0.8
-        for i in range(0, self.width(), step):
-            y0 = round(self.height()/2 + amp * math.sin(2*math.pi*self.n*(i/180)))
-            y1 = round(self.height()/2 + amp * math.sin(2*math.pi*self.n*((i+step)/180)))
-            painter.drawLine(QtCore.QLine(i, y0, i+step, y1))
+        step = round(W / len(self.samples))
+        if step == 0:
+            step = 1
 
-if __name__ == "__main__":
+        mult = 0.12*H/500
+        n = 0
+        for i in range(0, W, step):
+            if n == len(self.samples)-1:
+                break
+
+            v = self.samples[n][0]
+            w = self.samples[n+1][0]
+            if v <= 0: v = 0.000000001
+            if w <= 0: w = 0.000000001
+            y0 = H - v*mult
+            y1 = H - w*mult
+            n += 1
+            painter.drawLine(QtCore.QLine(i, round(y0), i+step, round(y1)))
+
+        font = painter.font()
+        font.setPointSize(22)
+        font.setWeight(QtGui.QFont.DemiBold)
+        painter.setFont(font)
+
+        # label - Raw HC-SR04 signal
+        painter.drawText(W-370, 50, "Surový signál přijímače")
+        painter.drawText(W-370, 85, "HC-SR04")
+
+with gex.Client(gex.TrxSerialThread()) as client:
     app = QApplication(sys.argv)
-    mainscreen = MyMainScreen()
+    mainscreen = MyMainScreen(client)
     mainscreen.show()
     app.exec_()