49 lines
963 B
Go
49 lines
963 B
Go
package utils
|
|
|
|
import (
|
|
"io"
|
|
"log"
|
|
"time"
|
|
|
|
"github.com/tarm/serial"
|
|
)
|
|
|
|
var (
|
|
device string
|
|
baudrate int
|
|
bytesize byte
|
|
port *serial.Port
|
|
portOpened = false
|
|
)
|
|
|
|
func OpenPort(device string, baudrate int, bytesize byte) error {
|
|
log.Println("opening port device:", device, ", baudrate=", baudrate, ", bytesize=", bytesize)
|
|
config := &serial.Config{Name: device, Baud: baudrate, Size: bytesize, ReadTimeout: time.Second * 1}
|
|
var err error
|
|
port, err = serial.OpenPort(config)
|
|
if err != nil {
|
|
log.Fatalln("error in open serial port ", err)
|
|
return err
|
|
}
|
|
log.Println("opened port ", port)
|
|
portOpened = true
|
|
return nil
|
|
}
|
|
|
|
func ReadPort() ([]byte, int) {
|
|
buffer := make([]byte, 256)
|
|
if !ServerRunning {
|
|
return buffer, 0
|
|
}
|
|
count, err := port.Read(buffer)
|
|
if err != nil && err != io.EOF {
|
|
log.Println("error in read port ", err)
|
|
//TODO: 3 time fail try to
|
|
}
|
|
return buffer, count
|
|
}
|
|
|
|
func IsPortOpen() bool {
|
|
return portOpened
|
|
}
|