- #LABVIEW SERIAL COMMUNICATION DRIVER#
- #LABVIEW SERIAL COMMUNICATION PATCH#
- #LABVIEW SERIAL COMMUNICATION WINDOWS#
This is a fairly simple task using the Serial Driver Init VI directed to the port the modem's hooked to and send out the modem command strings like:
If the character is present split the string at this point, passing the complete string to the processing VI, while passing the remainder of the split string back to the shift register to be concatenated with the next loop iteration (so there is no loss of data).Ī modem can easily be accessed from LabVIEW using the standard serial port VI's. If the character is not present, concatenate the read string with the data passed from the previous read (via a shift register) and continue to concatenate the string until the character is detected. Search the string returned using the "Split String.vi" or the "Scan String For Tokens.vi". In a loop determine the number of bytes at the port using the "Bytes at Port.vi", passing the number of bytes to the "Serial Port Read.vi". One method is to read all the bytes at the port. If you want access to the line printer in a built application, then the same rules for other LabVIEW ini file settings should be followed (see "How do I include ini settings in my built application?")įind a single character in a serial input stream. To avoid this feature you will need to set up a separate process and pass the strings to be printed via a queue or global. Note that this will pause your program execution until the printing is completed. In other words you must initialise the port (port 10 for LPT1) with the Serial Port Init VI and use the Serial Port Write VI to send the string to be printed direct to the printer.
Second, you need to access the printer just as you would a normal serial device. Using a simple text editor such as NOTEPAD. SerialDevices="COM1 COM2 COM3 COM4 COM5 COM6 COM7 COM8 (Although this is a perfectly valid solution to this problem you should read the excellent advice about this critical file in the section entitled "Should I play with the undocumented LabVIEW settings?")įirst add the following as a single complete line: You can use a line printer with LabVIEW, but you need to add a line to your LabVIEW ini file first. Simply navigate to ni.com and enter "accesshw" in the search engine on the main page.
#LABVIEW SERIAL COMMUNICATION PATCH#
To access the ports under these operating systems (and others like them) you need to download the AccessHW patch from NI's web site.
#LABVIEW SERIAL COMMUNICATION WINDOWS#
Unfortunately, or some would say fortunately, you cannot access the ports (using IN PORT and OUT PORT) directly under operating systems such as Windows NT and Windows 2000. 5 Using a modem to send an audio message.3 Find a single character in a serial input stream.
0 kommentar(er)
