ICP DAS USA I-7521, Руководство пользователя

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I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527 User’s Manual,Ver2.5 Aug.2015
128
The demo program, hp22_1.c, is designed to allow a Host PC to be
linked to a remote HP34401A. Refer to the companion CD for the
source code of the hp22_1.c file. The key features of hp22_1.c are as
follows:

The RTS3 pin of COM3 port must first be set as active HIGH to
enable the HP34401A.

A flow chart illustrating the functionality of the hp22_1.c file is
shown below:
Set the multimeter
to remote-control
mode
Any key
pressed?
Ask for
measuring
Acquire
reading
Set the multimeter
back to local
mode
start
end
N
Y
Note: the PC COM port should be 16550 compatible.