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sending_20a_20serial_20break [2018/03/31 13:19] – external edit 127.0.0.1sending_20a_20serial_20break [2024/01/05 00:21] (current) – external edit 127.0.0.1
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 //by Richard Russell, July 2007//\\ \\  Occasionally you may wish to send a **break** condition on a serial port output line. For example this may be needed to 'wake up' a remote device such as a modem. You can easily do that using the following code:\\ \\  //by Richard Russell, July 2007//\\ \\  Occasionally you may wish to send a **break** condition on a serial port output line. For example this may be needed to 'wake up' a remote device such as a modem. You can easily do that using the following code:\\ \\ 
 +<code bb4w>
         SYS "SetCommBreak", @hfile%(com1%)         SYS "SetCommBreak", @hfile%(com1%)
         WAIT 50         WAIT 50
         SYS "ClearCommBreak", @hfile%(com1%)         SYS "ClearCommBreak", @hfile%(com1%)
 +</code>
 Here **com1%** is the value returned from [[http://www.bbcbasic.co.uk/bbcwin/manual/bbcwinf.html#openport|OPENUP]] when the serial port was opened. In this example the **break** condition is maintained for about 0.5 seconds (50 centiseconds).\\ \\  For completeness here is a self-contained program which opens the port, sends the break, and then closes the port:\\ \\  Here **com1%** is the value returned from [[http://www.bbcbasic.co.uk/bbcwin/manual/bbcwinf.html#openport|OPENUP]] when the serial port was opened. In this example the **break** condition is maintained for about 0.5 seconds (50 centiseconds).\\ \\  For completeness here is a self-contained program which opens the port, sends the break, and then closes the port:\\ \\ 
 +<code bb4w>
         com1% = OPENUP("COM1:9600,n,8,1")         com1% = OPENUP("COM1:9600,n,8,1")
         IF com1% = 0 ERROR 100, "Couldn't open serial port COM1"         IF com1% = 0 ERROR 100, "Couldn't open serial port COM1"
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         CLOSE #com1%         CLOSE #com1%
 +</code>
sending_20a_20serial_20break.1522502380.txt.gz · Last modified: 2024/01/05 00:16 (external edit)