====== Bfree( ) ======

''variable = Bfree(channel, bufferType''
| //variable//    | Variable to store results (No String or Single) |
| //channel//     | RS232 Channel number (0 to 3)                   |
| //bufferType//  | 0=Receive Buffer, 1=Send Buffer                 |

This function will return the number of free bytes in a receive or send buffer. When sending data, this command can be used to avoid overflowing the buffer. When receiving data, this command can help the program wait for a specified amount of data to be received before taking action.

<code xbasic>
Dim A As Byte
OpenCom 1,19200,0, 100, 50
If Bfree(1,1)>10 Then
     Put "TECHNOLOGY"
End If
</code>

If the size of the buffer is set to 50, up to 49 bytes can be returned. When the buffer is empty, Bfree will return 1 less than the buffer size.


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