National Instruments PCI-8430, Manual

Page: 115 / 237

(LPDWORD) &l_ByteCount,
NULL
);
4. To retrieve the current RS-485 bias resistor mode, you can use
NISERIAL_GET_RS485_BIAS
and DeviceIoControl with the
following code:
SERIAL_RS485_BIAS l_SerialRs485Bias;
DWORD l_ByteCount;
DeviceIoControl (
PortHandle,
NISERIAL_GET_RS485_BIAS,
(LPVOID) NULL,
0,
(LPVOID) &l_SerialRs485Bias,
sizeof (l_SerialRs485Bias),
(LPDWORD) &l_ByteCount,
NULL
);