Trying to write a python program to create a simulated data stream and feed it, through a named pipe, to a VMware virtual machine. The host is running Ubuntu 11.10 and VMware player 5.0.0. The Vm is running Ubuntu netbook 10.04. I am able to get the pipe working on the local machine but I am not able to get the pipe to pass data through the virtual serial port to the programs running on the virtual machine.
#!/usr/bin/python import os # # Create a named pipe that will be used as the serial port on a VMware virtual machine SerialPipe = '/tmp/gpsd2NMEA' try: os.unlink(SerialPipe) except: pass os.mkfifo(SerialPipe) # # Open the named pipe NMEApipe = os.open(SerialPipe, os.O_RDWR|os.O_NONBLOCK) # # Write a string to the named pipe NMEAtime = "235959" os.write(NMEApipe, str( '%s\n' % NMEAtime ))
- Test to see if the python program is working on the host machine (displays 235959 if data is passing through the pipe)
$ cat /tmp/gpsd2NMEA
- Serial port as defined in the VMware .vmx file:
serial0.present = "TRUE"
serial0.startConnected = "TRUE"
serial0.fileType = "pipe"
serial0.fileName = "/tmp/gpsd2NMEA"
serial0.pipe.endPoint = "client"
serial0.autodetect = "FALSE"
serial0.tryNoRxLoss = "TRUE"
serial0.yieldOnMsrRead = "TRUE"
- Test to see if the serial port in the VM is receiving data
$ cat /dev/ttyS0
$ minicom -D /dev/ttyS0
$ stty -F /dev/ttyS0 cs8 -parenb -cstopb 115200
$ echo < /dev/ttyS0
- None of these display any data from the python program.