SPORT_PEEK_DATA (W*S)

Serial Port I/O Function: Returns information about the availability of input data.

Module

USE IFPORT

result = SPORT_PEEK_DATA (port [,present] [,count])

port	(Input) Integer. The port number.
present	(Output; optional) Integer. 1 if data is present, 0 if no data has been read.
count	(Output; optional) Integer. The count of characters that will be returned by SPORT_READ_DATA.

The result type is INTEGER(4). The result is zero if successful; otherwise, a Windows*OS error value.

CR and LF characters may not be returned depending on the mode specified in the SPORT_CONNECT( ) call.

USE IFPORT
INTEGER(4) iresult
INTEGER    present
INTEGER    count

iresult =  SPORT_PEEK_DATA( 2, present, count )
END