Advantech ADAM-5511 Manual page 282

Set DTR Low
Set DTR High
Set specified port DTR low
Set specified port DTR high
void port_lower_dtr(int portno)
void port_raise_dtr(int portno)
portno
None
void main ()
{
port_install(1);
:
:
//set port1 DTR low
port_lower_dtr(1);
//set port1 DTR high
port_raise_dtr(1);
}
The specified port number