CY545 Stepper System Controller
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BASIC Language CRT Emulation Program
The following BASIC language program emulates a CRT for direct serial communications with
the CY545A. It starts by sending the two carriage returns to set the CY545 baud rate. It then
sends the Mode command to enable the CTS/ signal. These are both done with CTS monitoring
disabled. The host serial port id then reconfigured to enable the CTS monitoring function, and all
other commands use CTS/. The program is a simple terminal emulator, which takes any
command entered from the keyboard and sends it to the CY545, while also displaying any serial
data sent by the CY545.
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300 CLS
BASIC Language
CRT EMULATOR FOR CY545A
Cybernetic Micro Systems, Inc.
This program configures the CY545A for serial commands,
by sending two carriage returns to set the adaptive
rate, then sending a Mode command to enable the Clear
To Send signal. After this, the program redefines the
computer serial port to function with the CTS signal.
It then becomes a terminal emulator, waiting for keyboard
input, which it displays on the screen and sends to the
CY545A, while displaying all serial characters received
from the CY545A.
310 LF$=CHR$(10)
320 '
:
CR$=CHR$(13) : NL$=CHR$(0) : ES$=CHR$(27)
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Open the COM1 serial port at 9600 baud, no parity
Note that CTS is disabled during this part
360 OPEN "COM1:9600,N,8,1,CS0,DS0,CD0" AS #1
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Send two carriage returns to adapt the CY545A baud rate
400 PRINT #1,CR$;CR$
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420 '
Send the Mode command to turn on the CY545A CTS signal
430 '
440 PRINT #1,"O 0A0h";CR$
450 FOR I% = 1 to 5000
460 NEXT I%
'Delay while Mode Command is sent
470 '
480 '
Now reconfigure COM1 to use CTS
490 '
500 CLOSE #1
510 OPEN "COM1:9600,N,8,1,CS30000,DS0,CD0" AS #1
520 LOCATE 5,5,1
530 PRINT "Ready to Go!"
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Open the screen for displays
570 OPEN "SCRN:" FOR OUTPUT AS #2
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Check for keyboard input. Display and send any
© 2002 Cybernetic Micro Systems
99
Chapter 20 - Getting Your CY545 Running
ETC [ ETC ]
