这是一个遥测程序,它从一个USB端口上的串行字符串读取数据。GUI是在QML文件中定义的,读取串行端口由字符串处理。GUI加载并正常工作。GUI send上的按钮有一个事件处理程序,可以将信号发送回GUI。这很管用。串行读取线程启动并正常运行。它读取和解析数据并将其打印到屏幕上。但是,这些信号并没有返回到GUI。你知道吗
我快疯了,谢谢你的帮助。你知道吗
你知道吗主.py你知道吗
import sys
import serial
from io import StringIO
import csv
from openpyxl import Workbook
import datetime
from PyQt5.QtGui import QGuiApplication
from PyQt5.QtQml import QQmlApplicationEngine
from PyQt5.QtCore import QObject, pyqtSignal, pyqtSlot, QThread
global ser
#define and open the serial port
ser=serial.Serial('COM6')
class Dash(QObject):
def __init__(self):
QObject.__init__(self)
ampHourvalue = pyqtSignal(int, arguments=['amphour'])
@pyqtSlot(int)
def reset(self, value):
value=100 #put amp hour capacity here
self.ampHourvalue.emit(value)
class ThreadClass(QThread):
# Create the signal
auxVoltage = pyqtSignal(str, arguments=['auxvolt'])
mainVoltage = pyqtSignal(int, arguments=['mainvolt'])
arrayCurrent = pyqtSignal(int, arguments=['arraycurrent'])
motorCurrent = pyqtSignal(int, arguments=['motorcurrent'])
def __init__(self, parent=None):
super(ThreadClass, self).__init__(parent)
def run(self):
try:
wb=load_workbook("History.xls") #attemps to open the history excel file
except:
wb=Workbook() #creates and empty excel workbook if histortory is not found
WorkSheetName=datetime.date.today() #get todays date
ws = wb.create_sheet("%s" %WorkSheetName) #create worksheet with the date as tittle
while True:
data=ser.readline(120) #read the stream
print(data)
data=data.decode() #convert stream from bytes to characters
data=StringIO(data)#convert a stream of characters into string
dataset=csv.reader(data, delimiter= ',') #read the CSV string into individual array
dataset=list(dataset) #convert the array to list
ws.append(dataset[0])
wb.save("History.xls")
#extract individual data points
aux=dataset[0][1]
print("Aux ", aux)
mainvolt=dataset[0][2]
print("Main ", mainvolt)
arraycurrent=dataset[0][3]
motorcurrent=dataset[0][4]
# Emit the signals
self.auxVoltage.emit(aux)
self.mainVoltage.emit(mainvolt)
self.arrayCurrent.emit(arraycurrent)
self.motorCurrent.emit(motorcurrent)
pass
def main():
import sys
# Create an instance of the application
app = QGuiApplication(sys.argv)
#start the thread
threadclass=ThreadClass()
threadclass.start()
# Create QML engine
engine = QQmlApplicationEngine()
# Create a Dash object
dashboard = Dash()
# And register it in the context of QML
engine.rootContext().setContextProperty("dashboard", dashboard)
# Load the qml file into the engine
engine.load("take2.qml")
engine.quit.connect(app.quit)
sys.exit(app.exec_())
if __name__ == "__main__":
main()
取2.qml
import QtQuick 2.5
import QtQuick.Controls 1.4
import QtQuick.Layouts 1.2
import QtQuick.Extras 1.4
ApplicationWindow {
id: applicationWindow
visible: true
width: 1000
height: 500
color: "black"
title: "I like Telemetry"
Text {
id: text1
x: 300
y: 6
width: 353
height: 34
text: qsTr("Solar Car Telemetry System")
anchors.horizontalCenter: parent.horizontalCenter
horizontalAlignment: Text.AlignHCenter
font.family: "Times New Roman"
font.pixelSize: 30
color: "grey"
}
CircularGauge {
id: circularGauge
x: 55
y: 111
width: 308
height: 279
anchors.verticalCenter: rowLayout.verticalCenter
Text {
id: text2
x: 143
y: 226
text: qsTr("Speed")
anchors.horizontalCenter: parent.horizontalCenter
horizontalAlignment: Text.AlignHCenter
font.pixelSize: 12
color: "grey"
}
}
CircularGauge {
id: auxvoltgauge
x: 381
y: 92
width: 151
height: 141
stepSize: .5
maximumValue: 15
value:1
Text {
id: text3
x: 445
width: 69
text: qsTr("Aux Battery")
anchors.top: parent.top
anchors.topMargin: -17
horizontalAlignment: Text.AlignHCenter
anchors.horizontalCenter: parent.horizontalCenter
font.pixelSize: 12
color: "grey"
}
Text {
id: text5
x: 64
y: 106
text: qsTr("Volts")
anchors.bottom: parent.bottom
anchors.bottomMargin: 10
font.pixelSize: 12
color: "grey"
}
}
CircularGauge {
id: circularGauge2
x: 381
y: 288
width: 151
height: 141
visible: true
Text {
id: text4
x: 445
y: 259
text: qsTr("Main Battery")
anchors.top: parent.top
anchors.topMargin: -17
fontSizeMode: Text.FixedSize
horizontalAlignment: Text.AlignHCenter
anchors.horizontalCenter: parent.horizontalCenter
font.pixelSize: 12
color: "grey"
}
Text {
id: text6
x: 64
y: 106
text: qsTr("Volts")
anchors.bottom: parent.bottom
anchors.bottomMargin: 10
font.pixelSize: 12
color: "grey"
}
}
Gauge {
id: amphourgauge
x: 803
y: 103
width: 114
height: 294
anchors.verticalCenterOffset: 0
anchors.verticalCenter: parent.verticalCenter
value: 50
Text {
id: text7
x: 30
y: 260
text: qsTr("AMP HOURS")
anchors.bottom: parent.bottom
anchors.bottomMargin: -25
anchors.horizontalCenter: parent.horizontalCenter
font.pixelSize: 18
color: "grey"
}
}
Button {
id: amphourreset
objectName: amphourreset
x: 795
y: 434
text: qsTr("Reset")
onClicked: dashboard.reset(amphourgauge.value)
}
Gauge {
id: arraycurrent
x: 621
y: 160
Text {
id: text10
text: qsTr("Array Current")
font.pixelSize: 12
color: "grey"
anchors.top: parent.top
anchors.topMargin: -17
fontSizeMode: Text.FixedSize
horizontalAlignment: Text.AlignHCenter
anchors.horizontalCenter: parent.horizontalCenter
}
}
Gauge {
id: motorcurrent
x: 710
y: 160
Text {
id: text9
text: qsTr("Motor Current")
font.pixelSize: 12
color: "grey"
anchors.top: parent.top
anchors.topMargin: -17
fontSizeMode: Text.FixedSize
horizontalAlignment: Text.AlignHCenter
anchors.horizontalCenter: parent.horizontalCenter
}
}
Connections {
target: dashboard
onAmpHourvalue: {
// sub was set through arguments=['amphour']
amphourgauge.value = amphour
}
onAuxVoltage: {
// sub was set through arguments=['auxvolt']
auxvoltgauge.value = auxvolt
}
}
}
@daegontaven是对的。问题是线程没有连接到包含GUI的线程。连接两个线程可以解决这个问题。我需要重新排序一些代码。你知道吗
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