fix serial

internal/util/serial/util.go

@@ -0,0 +1,66 @@
+package serial
+
+import (
+	"strconv"
+	"strings"
+)
+
+const (
+	DefaultPort     = "COM1"
+	DefaultBaudRate = 9600
+)
+
+// COM1,9600,odd
+func ParseConfigFromAddr(addr string) *Config {
+	cfg := &Config{
+		Name: DefaultPort,
+		Baud: DefaultBaudRate,
+	}
+	ss := strings.Split(addr, ",")
+	switch len(ss) {
+	case 1:
+		cfg.Name = ss[0]
+	case 2:
+		cfg.Name = ss[0]
+		cfg.Baud, _ = strconv.Atoi(ss[1])
+	case 3:
+		cfg.Name = ss[0]
+		cfg.Baud, _ = strconv.Atoi(ss[1])
+		cfg.Parity = parseParity(ss[2])
+	}
+	return cfg
+}
+
+func AddrFromConfig(cfg *Config) string {
+	ss := []string{
+		cfg.Name,
+		strconv.Itoa(cfg.Baud),
+	}
+
+	switch cfg.Parity {
+	case ParityEven:
+		ss = append(ss, "even")
+	case ParityOdd:
+		ss = append(ss, "odd")
+	case ParityMark:
+		ss = append(ss, "mark")
+	case ParitySpace:
+		ss = append(ss, "space")
+	}
+	return strings.Join(ss, ",")
+}
+
+func parseParity(s string) Parity {
+	switch strings.ToLower(s) {
+	case "o", "odd":
+		return ParityOdd
+	case "e", "even":
+		return ParityEven
+	case "m", "mark":
+		return ParityMark
+	case "s", "space":
+		return ParitySpace
+	default:
+		return ParityNone
+	}
+}