// Close restores the port to how it was before initialisation, closes the port and
// frees resources.
func Close(s *Conf) {
C.sp_flush(s.Port, SP_BUF_BOTH)
C.sp_free_config(s.newConfig)
C.sp_set_config(s.Port, s.oldConfig)
C.sp_free_config(s.oldConfig)
C.sp_close(s.Port)
}
// Finalizer callback for garbage collection.
func (p *Port) free() {
p.Info.free()
if p.c != nil {
C.sp_free_config(p.c)
}
p.c = nil
}
// 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()
}