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serial.go
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serial.go
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package main
import (
"errors"
"go.bug.st/serial.v1"
"go.bug.st/serial.v1/enumerator"
"log"
"strconv"
"strings"
"time"
)
var Connected bool
var SelectedPortId int
var SelectedDeviceId int
var SerialPort serial.Port
var SerialDevice string
var SerialResponse serialResponse
type serialResponse struct {
Cmd string
Code int
String string
Payload string
}
func getDeviceNames() []string {
var dn []string
for _, d := range Cfg.Device {
dn = append(dn, d.Name)
}
return dn
}
//noinspection ALL
func getSerialPorts() (usbports []string, perr error) {
//Devices.load()
ports2, err := enumerator.GetDetailedPortsList()
if err != nil {
log.Fatal(err)
return nil, err
}
ports, err2 := serial.GetPortsList()
if err2 != nil {
log.Fatal(err)
return nil, err2
}
if err != nil || err2 != nil {
log.Fatal(err)
return nil, err
}
if len(ports) == 0 {
log.Println("No serial ports found!")
return nil, nil
}
for _, port := range ports2 {
if port.IsUSB {
usbports = append(usbports, port.Name)
for di, d := range Cfg.Device {
if strings.ToLower(port.VID) == strings.ToLower(d.Vendor) && strings.ToLower(port.PID) == strings.ToLower(d.Product) {
//noinspection ALL
log.Printf("detected Device: %s\nportName: %s\n", Cfg.Device[di].Name, port.Name)
SelectedPortId = len(usbports) - 1
SelectedDeviceId = di
SerialDevice = port.Name
}
}
}
}
log.Printf("SelectedPortId: %d - SerialDevice1: %s - SelectedDeviceId: %d\n", SelectedPortId, SerialDevice, SelectedDeviceId)
return usbports, nil
}
//noinspection ALL
func connectSerial(selSerialPort string) (err error) {
c1 := make(chan int, 1)
go func() {
if selSerialPort == "" {
err = errors.New("no device given")
return
}
mode := &serial.Mode{
BaudRate: Cfg.Device[SelectedDeviceId].Config.Serial.Baud,
Parity: serial.NoParity,
DataBits: 8,
StopBits: serial.OneStopBit,
}
SerialPort, err = serial.Open(selSerialPort, mode)
if err != nil {
log.Println("error serial connect ", err)
} else {
c1 <- 1
}
}()
select {
case res := <-c1:
log.Printf("SerialPort %v connected - res: %d\n", SerialPort, res)
case <-time.After(time.Second * time.Duration(Cfg.Device[SelectedDeviceId].Config.Serial.ConeectionTimeout)):
err = errors.New("serial connection timeout")
}
if err != nil {
return err
}
return
}
//noinspection ALL
func sendSerialCmd(cmd string) {
SerialResponse.Cmd = cmd
SerialResponse.Code = -1
SerialResponse.String = ""
SerialResponse.Payload = ""
log.Printf("send cmd: %s\n", cmd)
temp := sendSerial(cmd)
prepareResponse(temp)
log.Printf("response:\n\tCode: %d\n\tString: %s \n\tPayload: %s\n", SerialResponse.Code, SerialResponse.String, SerialResponse.Payload)
}
func sendSerial(cmdStr string) string {
var resp string
c1 := make(chan string)
go func() {
_, err := SerialPort.Write([]byte(cmdStr + "\r\n"))
if err != nil {
log.Println("errro send serial: ", err, cmdStr)
}
time.Sleep(time.Millisecond * time.Duration(Cfg.Device[SelectedDeviceId].Config.Serial.WaitForReceive))
resp = receiveSerial()
c1 <- resp
}()
select {
case resp := <-c1:
return resp
case <-time.After(time.Second * time.Duration(Cfg.Device[SelectedDeviceId].Config.Serial.ConeectionTimeout)):
log.Println("sendSrial Timeout")
}
return resp
}
//noinspection ALL
func receiveSerial() (resp string) {
buff := make([]byte, 512)
var err error
var n = 0
var c = 0
for c < 1 {
n, err = SerialPort.Read(buff)
if err != nil {
log.Printf("error temp: %s - n %d - error (%s)\n", resp, n, err)
}
c = c + n
}
return string(buff[:c])
}
func deviceInfo(longInfo string) (shortInfo string) {
shortInfo = "undefined"
toks := strings.Split(longInfo, " ")
if len(toks) >= 3 {
shortInfo = toks[0] + " " + toks[1]
} else {
shortInfo = longInfo
}
return
}
func prepareResponse(res string) {
var result []string
res = strings.Replace(res, "\n", "#", -1)
res = strings.Replace(res, "\r", "#", -1)
res = strings.Replace(res, "##", "#", -1)
if !strings.Contains(res, ":") {
log.Println("no response given")
SerialPort.ResetInputBuffer()
return
}
temp := strings.Split(res, ":")
if len(temp[1]) >= 2 {
result = append(result, temp[0])
SerialResponse.Code, _ = strconv.Atoi(temp[0])
temp := strings.Split(temp[1], "#")
if len(temp) > 0 {
for i, s := range temp {
switch i {
case 0:
SerialResponse.String = s
case 1:
SerialResponse.Payload = s
}
if s != "" {
result = append(result, s)
}
}
}
}
}
func SerialSendOnly(cmd string) {
_, err := SerialPort.Write([]byte(strings.ToUpper(cmd) + "\r\n"))
if err != nil {
log.Println(err)
}
time.Sleep(time.Millisecond * time.Duration(Cfg.Device[SelectedDeviceId].Config.Serial.WaitForReceive))
return
}
func GetSpecificBytes(size int) []byte {
c1 := make(chan []byte, size)
go func() {
buff := make([]byte, size)
c := 0
for c < size {
n := 0
n, err := SerialPort.Read(buff)
if err != nil {
log.Println(err)
}
c = c + n
}
c1 <- buff
}()
select {
case buff := <-c1:
return buff
case <-time.After(time.Second * time.Duration(Cfg.Device[SelectedDeviceId].Config.Serial.ConeectionTimeout)):
log.Println("GetSpecificBytes Timeout")
}
return nil
}