May 22nd, 1999, 01:50 PM
I use the API functions SetCommState() or EscapeCommFunction() to set and clear the RTS signal on COM2, and I noticed that there is a time delay between the function call and the signal change (I used a scope to see this). But I write (or read) data to serial immediately after the function call.
How can I notice that the signal really changed before I begin a write or read operation?
How can I notice that the signal really changed before I begin a write or read operation?