th7/config/config.go

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package config
import (
"errors"
"fmt"
"strings"
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"th7/data/config"
"th7/data/thermocouple"
"github.com/spf13/viper"
)
var (
ErrConfigBadThermocoupleType = errors.New("unrecognised thermocouple type")
)
var (
thermocoupleTypes = map[string]thermocouple.Type{
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"B": thermocouple.B,
"E": thermocouple.E,
"J": thermocouple.J,
"K": thermocouple.K,
"N": thermocouple.N,
"R": thermocouple.R,
"S": thermocouple.S,
"T": thermocouple.T,
"U": thermocouple.None, // for uV measurements
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}
)
func getThermocoupleType(t string) (thermocouple.Type, error) {
t = strings.ToUpper(t)
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if val, ok := thermocoupleTypes[t]; ok {
return val, nil
} else {
return thermocouple.None, ErrConfigBadThermocoupleType
}
}
func Load() (config.Config, error) {
var cfg config.Config
var err error
v := viper.New()
v.AddConfigPath(".")
v.SetConfigFile("config.toml")
err = v.ReadInConfig()
if err != nil {
return cfg, err
}
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SetDefaultConfig(v)
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cfg.Board.Port = v.GetInt("TH7.port")
cfg.Board.Cache = v.GetBool("TH7.cache")
cfg.Board.Led = v.GetBool("TH7.LED")
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cfg.Board.Logfreq = v.GetInt("DB.freq")
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cfg.Board.Debug = v.GetBool("TH7.debug")
cfg.Board.NoLogging = v.GetBool("TH7.nolog")
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cfg.Channels = make([]config.Channel, 0)
for i := 1; i < 8; i++ {
var c config.Channel
var tc thermocouple.Type
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var head = fmt.Sprintf("Channel_%d", i)
if v.GetString(head+".type") == "NOTSET" {
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continue
}
c.Id = i
c.Gain = v.GetFloat64(head + ".gain")
c.Offset = v.GetFloat64(head + ".offset")
tc, err := getThermocoupleType(v.GetString(head + ".type"))
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if err != nil {
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fmt.Printf("%s.type=%s\n", head, v.GetString(head+ ".type"))
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return cfg, err
}
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c.Thermo = tc
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c.Filter.SampleSize = v.GetInt(head + ".filter.samples")
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c.Filter.Type = v.GetInt(head + ".filter.type")
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cfg.Channels = append(cfg.Channels, c)
}
cfg.DB = v.GetStringMap("DB")
return cfg, nil
}