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data.go
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data.go
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package CHNum
import (
"encoding/binary"
"fmt"
"sync"
"time"
"github.com/maritimusj/centrum/edge/devices/modbus"
)
var (
defaultCHNumPool = &sync.Pool{
New: func() interface{} {
return &Data{}
},
}
)
type Data struct {
AI int
DI int
DO int
AO int
VO int
TimeUsed time.Duration
pool *sync.Pool
}
func New() *Data {
data := defaultCHNumPool.New().(*Data)
data.pool = defaultCHNumPool
return data
}
func (ch *Data) Release() {
ch.AI = 0
ch.AO = 0
ch.DI = 0
ch.DO = 0
ch.VO = 0
ch.TimeUsed = 0
ch.pool.Put(ch)
}
func (ch *Data) Sum() int {
return ch.AI + ch.DI + ch.DO + ch.AO + ch.VO
}
func (ch *Data) Clone() *Data {
data := New()
data.AI = ch.AI
data.AO = ch.AO
data.DI = ch.DI
data.DO = ch.DO
data.VO = ch.VO
data.TimeUsed = ch.TimeUsed
return data
}
func (ch *Data) FetchData(conn modbus.Client) (retErr error) {
defer func() {
if err := recover(); err != nil {
retErr = fmt.Errorf("unexpect error: %#v", err)
return
}
}()
data, used, err := conn.ReadHoldingRegisters(16, 5)
if err != nil {
return err
}
ch.AI = int(binary.BigEndian.Uint16(data[0:]))
ch.DI = int(binary.BigEndian.Uint16(data[2:]))
ch.DO = int(binary.BigEndian.Uint16(data[4:]))
ch.AO = int(binary.BigEndian.Uint16(data[6:]))
ch.VO = int(binary.BigEndian.Uint16(data[8:]))
ch.TimeUsed = used
return nil
}