RS232:VT100, Data look equivalent but doesn't work
Posted on 1998-12-08
We are programming in Delphi a Programm with a Component we've downloaded.
We wan't to control 'System One' a system to play with a Model Railroad. This System can be controlled with Serial connection to the PC with the VT100 standard.
Problem: when we use the Hyperterminal (Win95) we send a String like this
s c05 s0 80 85 ef
-->when we strike the 'Enter' Key, System One take the data. When we use our Delphi-program it doesn't works. We connected to PC's together to look what our program Send - and the both strings looks equivalent!! but our doesn't works.
So we connected our cable with a Oscilloscope and we detected first the signal with the Hyperterminal --> it sends something, then with our software --> it sends nothing. But when we connect to PC's once again it seams that both send the same chars.
Can anybody help us?
P.S. our test with the Hyperterminal and our software we made on the same System on the Same PC during the same session, and we changed between the to software more than one time. We also didn't forget to disconnect Hyperterminal and our software before work with the other software
(sorry my bad english)