National Instruments PCI-8430 - Page 122

(LPVOID)NULL,
0,
(LPDWORD)&l_ByteCount,
NULL
);
4. TocleartheRS-232signalRIwhenthetransceiverisinDCE
mode,usethefollowingcode:
DWORDl_ByteCount;
DeviceIoControl(
PortHandle,
NISERIAL_CLR_RI,
(LPVOID)NULL,
0,
(LPVOID)NULL,
0,
(LPDWORD)&l_ByteCount,
NULL
);
5. ToretrievethecurrentstateoftheRS-232signalRIwhenthe
transceiverisinDCEmode,usethefollowingcode:
SERIAL_RI_OUTl_SerialRiOut;
DWORDl_ByteCount;
DeviceIoControl(
PortHandle,
NISERIAL_GET_RI,
(LPVOID)NULL,
0,
(LPVOID)&l_SerialRiOut,
sizeof(l_SerialRiOut),
(LPDWORD)&l_ByteCount,
NULL
);
6. TheSERIAL_DCD_OUTattributecanhavethefollowingvalues: