连接状态维护支持串口

zhangqian

2023-10-23 7692fa5336dc7db668306ea372a4516b5609776f

 service/plc.go

@@ -13,6 +13,7 @@
   "errors"
   "fmt"
   "github.com/spf13/cast"
   "sync/atomic"
)

func PlcWrite(plcConfig *model.DevicePlc, fieldType constvar.PlcStartAddressType, channel int32, value interface{}) (err error) {
@@ -57,6 +58,7 @@
   var (
      ipAddr string
   )
   defer dealErr(err)
   if plcConfig.Method == constvar.PlcMethodModbusTCP {
      ipAddr = fmt.Sprintf("%s:%v", plcConfig.Address, plcConfig.Port)
      err = WriteHoldingRegister(ipAddr, address, value)
@@ -81,6 +83,7 @@
   var (
      ipAddr string
   )
   defer dealErr(err)
   if plcConfig.Method == constvar.PlcMethodModbusTCP {
      ipAddr = fmt.Sprintf("%s:%v", plcConfig.Address, plcConfig.Port)
      value, err := ReadHoldingRegister(ipAddr, address, dataLength)
@@ -144,11 +147,50 @@
}

func PlcIsConnect() bool {
   if conf.Conf.PLC.Package == constvar.PlcPackageApache {
      return apacheplc4x.IsConnect()
   } else if conf.Conf.PLC.Package == constvar.PlcPackageApacheLongConnection {
      return false
   return IsConnect()
   //if conf.Conf.PLC.Package == constvar.PlcPackageApache {
   //   return apacheplc4x.IsConnect()
   //} else if conf.Conf.PLC.Package == constvar.PlcPackageApacheLongConnection {
   //   return false
   //} else {
   //   return modbusx.IsConnect()
   //}
}

func dealErr(err error) {
   if err != nil {
      FailureRemainingOpportunitiesDecr() //减少失败剩余机会
   } else {
      return modbusx.IsConnect()
      FailureRemainingOpportunitiesReset() //重置失败剩余机会
   }
}

var connectionStatus atomic.Bool

var failureRemainingOpportunities atomic.Int64

const (
   defaultFailureRemainingOpportunities = 20
)

func IsConnect() bool {
   return connectionStatus.Load()
}

func FailureRemainingOpportunitiesDecr() {
   newValue := failureRemainingOpportunities.Add(-1)
   if newValue <= 0 {
      connectionStatus.Store(false)
   }
   return
}

func FailureRemainingOpportunitiesReset() {
   if failureRemainingOpportunities.Load() < defaultFailureRemainingOpportunities {
      failureRemainingOpportunities.Store(defaultFailureRemainingOpportunities)
   }
   if connectionStatus.Load() == false {
      connectionStatus.Store(true)
   }
   return
}