Octagon 6000 Series, User Manual

Page: 52 / 233

5-3
6000 Series user’s manual Serial ports
Method 1
The system display will not appear over COM1 while the BIOS boots.
1. Run SETUP to disable the “COM1 as console” option.
2. Use QuickBASIC’s OPEN/CLOSE/PRINT/INPUT commands to access
COM1. The following is an example program using these commands:
OPEN "COM1:9600,N,8,1,BIN" FOR RANDOM AS #1
CRLF$=CHR$(13)+CHR$(10)
PRINT #1, "INPUT A STRING" + CRLF$
INPUT #1, A$
PRINT #1, CRLF$ + A$
CLOSE #1
Note All PRINT/PRINT USING/INPUT . . . commands must use the COMx
device number, where x represents the COM port used.
Method 2
1. Run SETUP to enable the “COM1 as console” option.
2. Use QuickBASIC’s OPEN/CLOSE/PRINT/INPUT commands to access
COM1. After closing the device, manually restore the serial param-
eters. The following example assumes 9600, N, 8, and 1 parameters:
OPEN"COM1:9600,N,8,1,BIN" FOR RANDOM AS #1
CRLF$ = CHR$(13) + CHR$(10)
PRINT #1, "INPUT A STRING" + CRLF$
INPUT #1, A$
PRINT #1, CRLF$ + A$
CLOSE #1
Note All PRINT/PRINT USING/INPUT . . . commands must use the COM1
device number.
3. Restore the serial parameters by using a batch file specifying your
program’s name as the first line of the file and COM1CON as the last
line of the file.
For example, TEST.BAT may include the following to execute a user
application named USECOM1:
USECOM1
COM1CON
Execute TEST.BAT.
COM1 will be used as a communication port by USECOM1, then COM1
is restored to a console port by COM1CON.
Note COM1CON is located on the PC Microcontroller utility disk.