How to properly handle objects within level-2 Simulink S-Functions

I'm attempting to use a level-2 S function to handle serial read/write to and from a device.

I need some help with two things:

1. How do I handle dialogue parameter inputs? I'd like to input the specified com port.
2. How can I create a serialport object that persists throughout an entire simulation? I'd like to avoid opening and closing the commport each iteration.

Thanks!

Answer 1

[Jan Houska]

Hi Zach,

while this does not directly answer your question, have you tried to use the Packet Input/Output or Stream Input/Output blocks with the Serial Port driver? These blocks from the Simulink Desktop Real-Time product library should be able to handle reading/writing serial port devices out of the box, with no programming necessary.

Jan