// Init attempts to initialises the port represented by the port name passed in.
func Init(s *Conf, name string) (int32, error) {
var result int32 = SP_OK
C.sp_new_config(&s.oldConfig)
C.sp_new_config(&s.newConfig)
cp := C.CString(name)
defer C.free(unsafe.Pointer(cp))
result = C.sp_get_port_by_name(cp, &s.Port)
checkResult(result)
// Open before setting params
result = C.sp_open(s.Port, SP_MODE_READ|SP_MODE_WRITE)
return result, checkResult(result)
}
func (p *Port) getConf() error {
if p.c == nil {
if err := errmsg(C.sp_new_config(&p.c)); err != nil {
return err
}
}
return errmsg(C.sp_get_config(p.p, p.c))
}
// Apply port options.
func (p *Port) Apply(o *Options) (err error) {
// get port config
var conf *C.struct_sp_port_config
if err = errmsg(C.sp_new_config(&conf)); err != nil {
return
}
defer C.sp_free_config(conf)
// set bit rate
if o.BitRate != 0 {
err = errmsg(C.sp_set_config_baudrate(conf, C.int(o.BitRate)))
if err != nil {
return
}
}
// set data bits
if o.DataBits != 0 {
err = errmsg(C.sp_set_config_bits(conf, C.int(o.DataBits)))
if err != nil {
return
}
}
// set stop bits
if o.StopBits != 0 {
err = errmsg(C.sp_set_config_stopbits(conf, C.int(o.StopBits)))
if err != nil {
return
}
}
// set parity
if o.Parity != 0 {
cparity := parity2c(o.Parity)
if err = errmsg(C.sp_set_config_parity(conf, cparity)); err != nil {
return
}
}
// set flow control
if o.FlowControl != 0 {
cfc, err := flow2c(o.FlowControl)
if err != nil {
return err
}
if err = errmsg(C.sp_set_config_flowcontrol(conf, cfc)); err != nil {
return err
}
}
// set RTS
if o.RTS != 0 {
crts := rts2c(o.RTS)
if err = errmsg(C.sp_set_config_rts(conf, crts)); err != nil {
return
}
}
// set CTS
if o.CTS != 0 {
ccts := cts2c(o.CTS)
if err = errmsg(C.sp_set_config_cts(conf, ccts)); err != nil {
return
}
}
// set DTR
if o.DTR != 0 {
cdtr := dtr2c(o.DTR)
if err = errmsg(C.sp_set_config_dtr(conf, cdtr)); err != nil {
return
}
}
// set DSR
if o.DSR != 0 {
cdsr := dsr2c(o.DSR)
if err = errmsg(C.sp_set_config_dsr(conf, cdsr)); err != nil {
return
}
}
// apply config
if err = errmsg(C.sp_set_config(p.p, conf)); err != nil {
return
}
// update local config
return p.getConf()
}