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hw_emulator.py
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hw_emulator.py
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# Copyright 2017 Marco Zollinger <[email protected]>
#
# This file is part of CocktailMixer.
#
# CocktailMixer is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# CocktailMixer is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with CocktailMixer. If not, see <http://www.gnu.org/licenses/>.
import sys
from PyQt5.QtCore import QIODevice, pyqtSignal, Qt
from PyQt5.QtWidgets import QApplication, QStyleFactory, QWidget, QGridLayout, QSizePolicy, QPushButton, QLabel, QScrollBar
from PyQt5.QtSerialPort import QSerialPort
# bridge COM ports COM8 and COM9 (using com0com), cocktailmixer controller listening on COM8
class Menu(QWidget):
encoder_update = pyqtSignal(int)
encoder_click = pyqtSignal()
emergency_stop = pyqtSignal()
scale_update = pyqtSignal(int)
def __init__(self, parent = None):
super().__init__(parent)
self.resize(640, 240)
self.setWindowTitle("Cocktailmixer Hardware Emulator")
layout = QGridLayout(self)
encoder_label = QLabel()
emergency_stop_label = QLabel()
scale_label = QLabel()
encoder_up_button = QPushButton()
encoder_down_button = QPushButton()
encoder_click_button = QPushButton()
emergency_stop_button = QPushButton()
scale_scroller = QScrollBar(Qt.Horizontal)
scale_scroller.setMaximum(100)
scale_value = QLabel()
encoder_label.setText("Encoder")
emergency_stop_label.setText("Emergency Stop")
encoder_up_button.setText("scroll up")
encoder_down_button.setText("scroll down")
encoder_click_button.setText("select")
emergency_stop_button.setText("STOP")
scale_label.setText("Scale Value")
scale_value.setText(str(0))
layout.addWidget(encoder_label, 0, 0)
layout.addWidget(emergency_stop_label, 0, 1)
layout.addWidget(scale_label, 0, 2)
layout.addWidget(encoder_up_button, 1, 0)
layout.addWidget(encoder_down_button, 2, 0)
layout.addWidget(encoder_click_button, 3, 0)
layout.addWidget(emergency_stop_button, 1, 1)
layout.addWidget(scale_scroller, 1, 2)
layout.addWidget(scale_value, 2, 2)
encoder_up_button.clicked.connect(lambda: self.encoder_update.emit(1))
encoder_down_button.clicked.connect(lambda: self.encoder_update.emit(-1))
encoder_click_button.clicked.connect(self.encoder_click)
emergency_stop_button.clicked.connect(self.emergency_stop)
scale_scroller.valueChanged.connect(lambda: self.scale_update.emit(scale_scroller.value()))
scale_scroller.valueChanged.connect(lambda: scale_value.setText(str(scale_scroller.value())))
class Emulator():
def __init__(self):
menu = Menu()
menu.show()
# TODO: define port at a better location
# TODO: check for port opening / writing exceptions
self.serial = QSerialPort()
self.serial.setPortName("COM9")
self.serial.open(QIODevice.ReadWrite)
self.serial.setBaudRate(115200)
self.serial.setDataBits(8)
self.serial.setParity(QSerialPort.NoParity)
self.serial.setStopBits(1)
self.serial.setFlowControl(QSerialPort.NoFlowControl)
assert self.serial.error() == QSerialPort.NoError
menu.encoder_update.connect(self.update_encoder)
menu.encoder_click.connect(self.click_encoder)
menu.emergency_stop.connect(self.update_emergency_stop)
menu.scale_update.connect(self.update_scale)
print("> EMU: emulator ready")
def update_encoder(self, counts):
print("> EMU: sending update_encoder")
self.serial.write(b'{"command": "update", "id": "encoder", "value": "%d", "checksum": "ABCD"}\n' % counts)
def click_encoder(self):
print("> EMU: sending update_encoder_button")
self.serial.write(b'{"command": "update", "id": "encoder_button", "value": "1", "checksum": "ABCD"}\n')
def update_emergency_stop(self):
print("> EMU: sending update_emergency_stop")
self.serial.write(b'{"command": "update", "id": "emergency_stop", "value": "1", "checksum": "ABCD"}\n')
def update_scale(self, value):
print("> EMU: sending update_scale")
self.serial.write(b'{"command": "update", "id": "scale", "value": "%d", "checksum": "ABCD"}\n' % value)
def main(args):
app = QApplication(args)
emulator = Emulator()
sys.exit(app.exec_())
if __name__== "__main__":
main( sys.argv )