Campbell CR6 Series, Operator'S Manual

Page: 368 / 690

Section 7. Installation
368
'Serial In Declarations
'Declare a string variable large enough to hold the input string
Public SerialInString As String * 25
'Declare strings to accept parsed data. If parsed data are strictly numeric, this
'array can be declared as Float or Long
Public InStringSplit(2) As String
Alias InStringSplit(1) = TempIn
Alias InStringSplit(2) = RhIn
'Main Program
BeginProg
'Simulate temperature and RH sensor
TempOut = 27.435 'Set simulated temperature to transmit
RhOut = 56.789 'Set simulated relative humidity to transmit
Scan (5,Sec, 3, 0)
'Serial Out Code
'Transmits string "*27.435,56.789#" out COM1
SerialOpen (ComC1,9600,0,0,10000) 'Open a serial port
'Build the output string
SerialOutString = "*" & TempOut & "," & RhOut & "#"
'Output string via the serial port
SerialOut (ComC1,SerialOutString,"",0,100)
'Serial In Code
'Receives string "27.435,56.789" via COM2
'Uses * and # character as filters
SerialOpen (ComC3,9600,0,0,10000) 'Open a serial port
'Receive serial data as a string
'42 is ASCII code for "*", 35 is code for "#"
SerialInRecord (ComC3,SerialInString,42,0,35,"",01)
'Parse the serial string
SplitStr (InStringSplit(),SerialInString,"",2,0)
NextScan
EndProg
7.7.18.6 Serial I/O Application Testing
A common problem when developing a serial I/O application is the lack of an
immediately available serial device with which to develop and test programs.
Using
HyperTerminal
, a developer can simulate the output of a serial device or
capture serial input.
Note
HyperTerminal
is provided as a utility with
Windows XP
and earlier
versions of Windows. HyperTerminal is not provided with later versions
of Windows, but can be purchased separately from
http://www.hilgraeve.com. HyperTerminal automatically converts binary
data to ASCII on the screen. Binary data can be captured, saved to a file,
and then viewed with a hexadecimal editor. Other terminal emulators are