Platform | Win32 |
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Purpose |
To set the yield state for READCOMMDEVICE@. |
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Syntax |
INTEGER (KIND=3) SETYIELDCOMM@(PORTNUM,STATE) |
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Description |
Use this function to configure a serial port that has been opened by a call to OPENCOMMDEVICE@. PORTNUM must be a valid port number in the range 1 to 4. STATE is zero by default. Call this function with STATE=1 in order to allow subsequent calls to READCOMMDEVICE@ to yield to other applications whilst waiting for data. |
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Return value |
SETYIELDCOMM@ returns a positive value when successful otherwise it returns -1. |