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Thread: Serial Communications

  1. #1

    Thread Starter
    New Member
    Join Date
    Apr 2000
    Posts
    2
    I'm trying to set up an experiment where I need to send a command to an external mass balance, (output) and collect the value the scale reads (input). I need to send the characters "?1" out commport 2 and then place the numbers that come back into an array for analysis. I only have VB 6.0 working model, and it doesn't seem to have the communications control. Can anyone give me an example of how to set this up? Here's a chunk of what I've got so far:
    How do I set up the variables? (MSComm1, etc.)

    'Set up communication with balance
    MSComm1.CommPort = 2
    MSComm1.Settings = "2400,N,8,1"
    MSComm1.PortOpen = True

    'Set up start and end times
    StartTime = Timer
    EndTime = StartTime + (SampleTime * 60)

    'Run timer loop until sampling time is reached
    Do While CurrentTime < EndTime
    i = i + 1

    'Take a mass measurement:
    MSComm1.Output = "?1"
    MassData(i) = MSComm1.Input

  2. #2
    Hyperactive Member
    Join Date
    Jun 1999
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    308
    Do you still need help?

  3. #3
    Junior Member
    Join Date
    Apr 2000
    Location
    Antwerp
    Posts
    20

    Talking Serial Communication

    Hi

    Have you added the MSComm control to your form?????

    If you have, then you need to look at the properties of the MSComm control.

    There you can find the MSComm1!!!

    Good Luck

    If you know someone who can help me with my problem, I need to communicate with a DSP evaluation board

  4. #4
    Member
    Join Date
    Feb 2000
    Location
    Toronto, Canada
    Posts
    44
    Viperke,

    I can help, tell me where are you stuck or what you need to be done.

  5. #5

    Thread Starter
    New Member
    Join Date
    Apr 2000
    Posts
    2
    The MSComm control is working now

  6. #6
    Junior Member
    Join Date
    Apr 2000
    Location
    Antwerp
    Posts
    20

    Communication with DSP

    Hi, Sacred_knight

    First I'm sorry for my english, it isn't that good.

    OK

    For my thesis I need to display a weather image on my PC screen.
    Data comming from the receiver goes to an evaluation board with a DSP on board(TMS320C5X)(Texas Instuments).

    Now I need to be able to download the *.dsk file to the evaluation board. After that I need to run the software on the DSP, so he can transfer the data to the serial poort. This data I need to display on my screen.

    My problem is the communication with the DSP evaluation board. I can't find enough information.

    Now, I can open and close the port, drop DTR low and after that High (for resetting the DSP). Now I need to send a start bit to the DSP. Here starts my problem. The DSP need to answer with a ESC (27) character. The DSP answers me, but no the right way. He sends me strange characters!!!!

    I also can't find information about downloading the *.dsk file to the evaluation bord.

    I hope you can help me, because at this moment no one can hepl me. If you need my source code, or other information, please ask!!!!

    TNX
    Viperke

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