Advantech ADAM-5511 Manual page 272

Set Port Data Format
Set the parameters for data length, parity and stop bits for specified
port
void port_set_format(int portno, int data_length, int parity, int
stop_bit)
portno
data length
parity
stop bit
None
void main ()
{
port_install(1);
port_select(1);
port_speed(1, 9600L);
//set data format(Data Length=8; Parity=None; Stop Bit=1)
port_set_format(1, 8, 0, 1);
}
The specified port number
5 - 8
0x00 no parity
0x01 odd parity
0x02 even parity
0x01 1 stop bit
0x02 2 stop bits