HMI application for WinCE 5.0

[jfazekas]

I'm investigating a project in which I want to use Labview or LabWindows CVI to create an HMI on an XScale 500 MHz SBC with  800x600 screen.  I am concerned about execution time and wonder if anyone has experience with real-time graphing using a PDA.  Would the application exeucte much faster if I wrote the code with CVI?  The application grabs data off RS232 serial port every 10msec and adds data to Waveform Chart (autoscaling X and Y).

[tst]

I don't think that CVI supports CE, although there's always embedded VC, which I think you can even get for free from Microsoft's site.

The LV PDA module does have some timing issues (see here, for example), but I believe you can work around those by using a timeout instead (unless you will run into an issue like I described in that thread).

I haven't benched the PDA module (and such a benching would be device specific anyway), but if you look here you will see that 10 ms hasn't been reached in that attempt. You should consider whether you actually need 10 ms, however. Almost no one will be able to see updates faster than 30 ms or so and I wouldn't be surprised if the OS itself limits updates to the screen to slower speeds.