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Subject: RS-232 and RTWT
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We have a project which contains PIC microcontroller, RS-232 interface and PC (with Matlab, Simulink).We have to connect PIC to PC via RS-232 and sent datas in real time. 
I found this link when I search related topics includes RS-232 and PIC keywords.
http://hades.mech.northwestern.edu/index.php/Serial_communication_with_Matlab 
However, this example does not working in Simulink's Embedded Matlab Block. PIC should get the 4digit number, we could not send the data from simulink to PIC. Is there anybody work on RTWT Simulink , RS-232 and PIC to help us?