harenber/go-scsupdate
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Implemented additional checks. Add force flag to flash firmware even if modem is in BIOS mode.

Browse Source
This commit is contained in:
Torsten Harenberg
2021-12-21 17:26:43 +01:00
parent c9847645ba
commit befec94cc6
3 changed files with 37 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
firmware/firmware.go
View File

@@ -18,6 +18,7 @@ func FwExists(path string) bool {
return !errors.Is(err, os.ErrNotExist)
}
// ChkHeader: runs header and CRC checks on the firmware file
func ChkHeader(fwfile string) error {
log.Info("checking ", fwfile)
// SCS has two different file layouts, one for the "Dragons", the other for any older modem
@@ -62,9 +63,7 @@ func ChkHeader(fwfile string) error {
size = uint32(binary.LittleEndian.Uint16(firmware[2:4])) // PTC-3 and Co
}
a := make([]byte, 4)
//binary.LittleEndian.PutUint32(a, crc32.ChecksumIEEE(firmware[4:size+4])) // PTC-3
binary.LittleEndian.PutUint32(a, crc32.ChecksumIEEE(firmware[offset:offset+size]))
//if bytes.Equal(a, firmware[4+size:8+size]) { // PTC-3
if bytes.Equal(a, firmware[offset+size:offset+size+4]) {
log.Info("CRC checksum ok!")
} else {

15
main.go
View File

@@ -1,3 +1,7 @@
// Copyright 2021 Torsten Harenberg DL1THM. All rights reserved.
// A SCS PACTOR modem flashing utility written in Go. Should run anywhere Go runs.
package main
import (
@@ -16,8 +20,11 @@ func main() {
serialDevice := parser.String("s", "serialDevice", &argparse.Options{Required: false, Help: "(optional) serial device the modem is attached to, e.g. /dev/ttyUSB0. If not set, go-scsupdate will search for SCS modems."})
brate := parser.Int("b", "baudrate", &argparse.Options{Required: false, Help: "(optional, required when -s is set) sets the serial baudrate, e.g. 115200"})
f := parser.String("f", "file", &argparse.Options{Required: true, Help: "(required) the file to flash, e.g. profi41r.pro"})
debug := parser.Flag("d", "debug", &argparse.Options{Required: false, Help: "(optional) enable debug logs"})
dryrun := parser.Flag("n", "dryrun", &argparse.Options{Required: false, Help: "(optional) drying: if set, modem will detected but no firmware being written"})
force := parser.Flag("", "force", &argparse.Options{Required: false, Help: "(optional) skip testing if firmware fits modem. Useful if the modem is bricked and you need to put it into BIOS mode. Read the manual!"})
sertimeout := parser.Int("t", "timeout", &argparse.Options{Required: false, Help: "(optional) Sets the read and write timeout. Default: 70. If you have handshake problems, enlarge this values, especially for older modems."})
err := parser.Parse(os.Args)
cLog := console.New(true)
if *debug {
@@ -27,6 +34,10 @@ func main() {
log.AddHandler(cLog, log.InfoLevel, log.ErrorLevel, log.AlertLevel, log.WarnLevel, log.NoticeLevel, log.PanicLevel)
}
if *sertimeout == 0 { // if not set, set the write / read timeout to 70
*sertimeout = 70
}
if *serialDevice != "" && *brate == 0 {
log.Fatal("ERROR: if you specify a device, you need to specify a baud rate as well. Cannot continue")
}
@@ -79,9 +90,9 @@ func main() {
if *dryrun != true {
var err error
if *serialDevice != "" {
err = update.Update(*serialDevice, baudrate, *f)
err = update.Update(*serialDevice, baudrate, *sertimeout, *f, *force)
} else {
err = update.Update(ports[0].Port, baudrate, *f)
err = update.Update(ports[0].Port, baudrate, *sertimeout, *f, *force)
}
if err != nil {
log.Panic(err)

27
update/update.go
View File

@@ -14,22 +14,25 @@ import (
"regexp"
"strings"
"time"
"unicode"
)
// Size of a "firmware packet" over the serial line
const CHUNKSIZE = 256
type modem struct {
port serial.Port
}
func initmodem(serport string, baudrate int) (*modem, error) {
// initmodem: opens the serial line, returns instance of serial.Port
func initmodem(serport string, baudrate int, sertimeout int) (*modem, error) {
p, err := serial.Open(serport,
serial.WithBaudrate(baudrate),
serial.WithDataBits(8),
serial.WithParity(serial.NoParity),
serial.WithStopBits(serial.OneStopBit),
serial.WithReadTimeout(70),
serial.WithWriteTimeout(70)) // 50 was not stable, bump to 70
serial.WithReadTimeout(sertimeout),
serial.WithWriteTimeout(sertimeout))
if err != nil {
fmt.Printf("ERROR: File %s could not be opened\n", serport)
return nil, err
@@ -38,9 +41,12 @@ func initmodem(serport string, baudrate int) (*modem, error) {
return m, nil
}
// write: writes to the serial ports, returns answer and logs output
func (m *modem) write(out string, nolog ...bool) ([]byte, error) {
if len(nolog) == 0 {
log.Debug("Sending " + out)
log.Debug("Sending " + strings.TrimFunc(out, func(r rune) bool {
return !unicode.IsGraphic(r)
}))
} else {
if len(out) < 200 { // in other cases it's the firmware!
log.Debugf("Sending %d byte(s)", len(out))
@@ -67,6 +73,7 @@ func (m *modem) write(out string, nolog ...bool) ([]byte, error) {
}
// getSerNum: tries to find out the serial number of the modem.
func (m *modem) getSerNum() (string, error) {
answer, err := m.write("\rsys sern\r")
if err != nil {
@@ -77,6 +84,7 @@ func (m *modem) getSerNum() (string, error) {
return sn, nil
}
// setDateTime: sets the current date and time (taken from the host) to the modem
func (m *modem) setDateTime() error {
ct := time.Now()
answer, err := m.write("DATE " + ct.Format("020106\r"))
@@ -93,6 +101,7 @@ func (m *modem) setDateTime() error {
return nil
}
// writeUpdate: main flash utility. Writes the firmware taken from fwfile to the modem. Write progress bar.
func (m *modem) writeUpdate(fwfile string) error {
_, err := m.write("UPDATE\r")
if err != nil {
@@ -174,6 +183,7 @@ func (m *modem) writeUpdate(fwfile string) error {
return nil
}
// checkFirmwareFits: checks the type of the modem and compares the file extension.
func (m *modem) checkFirmwareFits(fwfile string) error {
answer, err := m.write("ver ##\r")
if err != nil {
@@ -215,8 +225,9 @@ func (m *modem) checkFirmwareFits(fwfile string) error {
}
func Update(serport string, baudrate int, fwfile string) error {
m, err := initmodem(serport, baudrate)
// Update: main firmware update utility. Runs pre-checks and calls main flashing function writeUpdate
func Update(serport string, baudrate int, sertimeout int, fwfile string, force bool) error {
m, err := initmodem(serport, baudrate, sertimeout)
defer m.port.Close()
if err != nil {
return errors.New("FEHLER in Update")
@@ -232,9 +243,13 @@ func Update(serport string, baudrate int, fwfile string) error {
if m.setDateTime() != nil {
return err
}
if force == false {
if m.checkFirmwareFits(fwfile) != nil {
return err
}
} else {
log.Noticef("Skipping checks if firmware fits modem due to force flag!")
}
if m.writeUpdate(fwfile) != nil {
return err
}