owon-spe 支持crate

Owon SPE电源的SCPI协议的辅助crate；已在Owon SPE 3102上测试

use owon_spe::SPE;

fn main() {
  let mut spe = SPE::from_serialport("/dev/ttyUSB0").unwrap();
  let info = spe.idn().unwrap();
  println!("Model: {}, Serial: {}, FW: {}", info.model, info.serial, info.fw);
}