/
serial.go
101 lines (88 loc) · 1.72 KB
/
serial.go
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package internal
import (
"errors"
"github.com/iot-master-contrib/gateway/types"
"github.com/zgwit/iot-master/v4/pkg/log"
"go.bug.st/serial"
"time"
)
// Serial 串口
type Serial struct {
tunnelBase
model *types.Serial
}
func NewSerial(model *types.Serial) *Serial {
return &Serial{
model: model,
}
}
// Open 打开
func (s *Serial) Open() error {
if s.running {
return errors.New("serial is opened")
}
s.closed = false
opts := serial.Mode{
BaudRate: int(s.model.BaudRate),
DataBits: int(s.model.DataBits),
StopBits: serial.StopBits(s.model.StopBits),
Parity: serial.Parity(s.model.ParityMode),
}
port, err := serial.Open(s.model.PortName, &opts)
if err != nil {
//TODO 串口重试
s.Retry()
return err
}
//读超时
err = port.SetReadTimeout(time.Second * 5)
if err != nil {
return err
}
s.running = true
s.online = true
s.Conn = port
//清空重连计数
//s.retry = 0
//守护协程
go func() {
timeout := s.model.RetryOptions.RetryTimeout
if timeout == 0 {
timeout = 10
}
for {
time.Sleep(time.Second * time.Duration(timeout))
if s.running {
continue
}
if s.closed {
return
}
//如果掉线了,就重新打开
err := s.Open()
if err != nil {
log.Error(err)
}
break //Open中,会重新启动协程
}
}()
//启动轮询
return s.start(&s.model.Tunnel)
}
func (s *Serial) Retry() {
retry := &s.model.RetryOptions
if retry.RetryMaximum == 0 || s.retry < retry.RetryMaximum {
s.retry++
timeout := retry.RetryTimeout
if timeout == 0 {
timeout = 10
}
s.retryTimer = time.AfterFunc(time.Second*time.Duration(timeout), func() {
s.retryTimer = nil
err := s.Open()
if err != nil {
log.Error(err)
}
})
}
}