我想做什么?
我正在尝试构建一个pythonqt Gui,它允许我轻松地运行/调试 微控制器的嵌入式程序。 作为一个编译器,我使用的是sdcc。Sdcc还包含一个模拟器。在
在代码中,我启动了一个子QProcess,它将运行微控制器模拟器(s51
)。在
在模拟器中,模拟首先输入r+RETURN("r\n"
)。在
可以通过按RETURN("\n"
)随时停止模拟。在
我的问题
我的问题是我的代码无法到达第二个返回。 换言之,模拟继续进行。 不管怎样,子进程永远不会收到第二个返回。在
复制步骤
r
,然后按回车键。
现在应该开始模拟。在注意事项:
我已经在FedoraLinux上编写了代码。
如果你在运行Ubuntu,你可能需要将可执行文件的路径改为/usr/bin/s51
(我不确定确切的路径)。
这些代码在其他一些控制台应用程序上“运行良好”,比如bash、python、ifconfig、echo、gcc。。。
我认为问题与sdcc在读取“r\n”命令(使用strace找到)后立即执行ioct有关:
ioctl(0, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
编辑1:我正在运行qt4.8.3
编辑2:简化并修复了代码+添加了一个屏幕截图
屏幕截图
模拟应该在第二次返回后停止。在
(我输入了h run\n
,run\n
,\n
,\n
,\help
)
Screen shot can be found here (not enough reputation)
SimpleConsole.py: 在
#!/usr/bin/env python3
import sys
from PyQt4 import Qt, QtGui, QtCore
class SimpleConsole(QtGui.QMainWindow):
def __init__(self):
QtGui.QMainWindow.__init__(self)
self.setup()
self.process = None
def setup(self):
l = QtGui.QHBoxLayout()
lbl = QtGui.QLabel('Command:')
self.processExecutable = QtGui.QLineEdit()
self.processExecutable.setEnabled(True)
self.processExecutable.returnPressed.connect(self.startStopProcess)
self.processExecutable.setText('/usr/libexec/sdcc/s51')
lbl.setBuddy(self.processExecutable)
l.addWidget(lbl)
l.addWidget(self.processExecutable)
self.processOutputWidget = QtGui.QTextEdit()
self.processOutputWidget.setReadOnly(True)
self.processInputWidget = QtGui.QLineEdit()
self.processInputWidget.setEnabled(False)
self.processInputWidget.returnPressed.connect(self.inputForProcess)
main = QtGui.QVBoxLayout()
main.addLayout(l)
main.addWidget(self.processOutputWidget)
main.addWidget(self.processInputWidget)
widget = QtGui.QWidget()
widget.setLayout(main)
self.setCentralWidget(widget)
self.setStatusBar(QtGui.QStatusBar())
self.statusBarLabel = QtGui.QLabel()
self.statusBar().addWidget(self.statusBarLabel)
self.toolbar = QtGui.QToolBar()
self.addToolBar(self.toolbar)
self.startStopAction = self.toolbar.addAction('Start')
self.startStopAction.triggered[bool].connect(self.startStopProcess)
def closeEvent(self, event):
self.stopProcess()
@QtCore.pyqtSlot(QtCore.QProcess.ProcessState)
def processStateChanged(self, newState):
self.processInputWidget.setEnabled(newState == QtCore.QProcess.Running)
pid = self.process.pid()
if newState == QtCore.QProcess.Running:
self.startStopAction.setText('Stop')
self.startStopAction.setEnabled(True)
self.processExecutable.setEnabled(False)
elif newState == QtCore.QProcess.NotRunning:
self.processInputWidget.setEnabled(False)
self.processInputWidget.clear()
self.startStopAction.setText('Start')
self.startStopAction.setEnabled(True)
self.processExecutable.setEnabled(True)
self.process = None
status = {QtCore.QProcess.NotRunning:'not running',
QtCore.QProcess.Starting:'starting',
QtCore.QProcess.Running:'running'}
self.statusBarLabel.setText('Process state change: {newState}. (pid={pid})'.format(newState=status[newState], pid=pid))
@QtCore.pyqtSlot()
def startStopProcess(self):
if self.process:
self.stopProcess()
else:
self.processOutputWidget.clear()
self.process = QtCore.QProcess(self)
self.process.stateChanged.connect(self.processStateChanged)
self.process.readyReadStandardOutput.connect(self.processOutputRead)
self.process.readyReadStandardError.connect(self.processErrorRead)
exe = self.processExecutable.text()
self.process.start(exe, QtCore.QIODevice.ReadWrite)
def moveCursorToEnd(self):
self.processOutputWidget.moveCursor(QtGui.QTextCursor.End, QtGui.QTextCursor.MoveAnchor)
@QtCore.pyqtSlot()
def inputForProcess(self):
cmd = self.processInputWidget.text() + '\n'
self.moveCursorToEnd()
self.processOutputWidget.insertPlainText(cmd)
self.process.writeData(bytearray(cmd, encoding='utf-8'))
self.process.waitForBytesWritten()
self.processInputWidget.clear()
@QtCore.pyqtSlot()
def processOutputRead(self):
bytesOut = bytes(self.process.readAllStandardOutput()).decode('utf-8')
self.moveCursorToEnd()
self.processOutputWidget.insertPlainText(bytesOut)
@QtCore.pyqtSlot()
def processErrorRead(self):
bytesError = bytes(self.process.readAllStandardError()).decode('utf-8')
self.moveCursorToEnd()
self.processOutputWidget.insertPlainText(bytesError)
def stopProcess(self):
if self.process:
self.process.closeWriteChannel()
if not self.process.waitForFinished(500):
self.process.terminate()
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
w = SimpleConsole()
w.show()
app.exec_()
目前没有回答
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