A question about serial port?

[Sean_usc]

Hi,

I am thinking of using the serial port to send out a trigger signal. Basiclly,  the trigger signal is used as an interrupt input of a microcontroller.  The trigger signal remains 'low' first, then it changes to 'high' for several milliseconds, finally the trigger signal changes to 'low' again.

Is that possible?

Thanks

[rolfk]

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@Sean_usc wrote:

Hi,

I am thinking of using the serial port to send out a trigger signal. Basiclly,  the trigger signal is used as an interrupt input of a microcontroller.  The trigger signal remains 'low' first, then it changes to 'high' for several milliseconds, finally the trigger signal changes to 'low' again.

Is that possible?

Thanks

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Yes, as long as the timing of several milliseconds is not to critical you could simply use VISA to set one of the handshake lines RTS, CTS, DTS, DCD etc to the desired state. Just watch out RS-232 is really a +-3 to 15V interface so connecting the line directly to your mocrocontroller will probably fry it.

Rolf Kalbermatter