v0.2: improved serial i/o significantly

.idea/remote-targets.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteTargetsManager">
+    <targets>
+      <target name="pi@funkpi.fritz.box:22" type="ssh/sftp" uuid="aeb286c6-b75d-4521-a125-14979623eb00">
+        <config>
+          <option name="projectRootOnTarget" value="/home/pi/go-scsupdate" />
+          <option name="serverName" value="pi@funkpi.fritz.box:22 password" />
+          <option name="useRsync" value="true" />
+        </config>
+        <ContributedStateBase type="GoLanguageRuntime">
+          <config>
+            <option name="goPath" value="/home/pi/go" />
+            <option name="goRoot" value="/usr/local/go/bin//go" />
+            <option name="goVersion" value="go1.18.3 linux/arm" />
+          </config>
+        </ContributedStateBase>
+      </target>
+    </targets>
+  </component>
+</project>

.idea/runConfigurations/go_build_go_scsupdate.xml

@@ -0,0 +1,14 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="go build go-scsupdate" type="GoApplicationRunConfiguration" factoryName="Go Application" nameIsGenerated="true">
+    <module name="go-scsupdate" />
+    <target name="pi@funkpi.fritz.box:22" />
+    <working_directory value="$PROJECT_DIR$" />
+    <kind value="PACKAGE" />
+    <package value="go-scsupdate" />
+    <directory value="$PROJECT_DIR$" />
+    <filePath value="$PROJECT_DIR$" />
+    <option name="build_on_remote_target" value="true" />
+    <option name="run" value="false" />
+    <method v="2" />
+  </configuration>
+</component>

CHANGELOG.md

@@ -1,5 +1,11 @@
 # go-scsupdate Changelog
 
+## v0.2
+
+- serial write process now handles error (especially interrupted system call errors) properly
+- remove serial timeout parameter - no needed anymore with the change above
+- moved to go-playground/log/v8
+
 ## v0.1
 
 Initial release

firmware/firmware.go

@@ -4,7 +4,7 @@ import (
 	"bytes"
 	"encoding/binary"
 	"errors"
-	"github.com/go-playground/log/v7"
+	"github.com/go-playground/log/v8"
 	"hash/crc32"
 	"io"
 	"io/ioutil"

go.mod

@@ -4,23 +4,21 @@ go 1.17
 
 require (
 	github.com/akamensky/argparse v1.3.1
-	github.com/albenik/go-serial/v2 v2.4.0
+	github.com/albenik/go-serial/v2 v2.5.1
+	github.com/go-playground/log/v8 v8.0.1
+	github.com/schollz/progressbar/v3 v3.8.3
 )
 
 require (
 	github.com/creack/goselect v0.1.2 // indirect
-	github.com/go-playground/ansi/v3 v3.0.0 // indirect
+	github.com/go-playground/errors/v5 v5.2.3 // indirect
-	github.com/go-playground/errors/v5 v5.1.1 // indirect
+	github.com/go-playground/pkg/v5 v5.6.0 // indirect
-	github.com/go-playground/log/v7 v7.0.2 // indirect
-	github.com/go-playground/pkg/v4 v4.0.0 // indirect
-	github.com/go-playground/pkg/v5 v5.3.0 // indirect
 	github.com/mattn/go-runewidth v0.0.13 // indirect
 	github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db // indirect
 	github.com/rivo/uniseg v0.2.0 // indirect
-	github.com/schollz/progressbar/v3 v3.8.3 // indirect
 	go.uber.org/atomic v1.9.0 // indirect
 	go.uber.org/multierr v1.7.0 // indirect
 	golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3 // indirect
 	golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e // indirect
-	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
+	golang.org/x/term v0.0.0-20220526004731-065cf7ba2467 // indirect
 )

go.sum

@@ -1,35 +1,27 @@
-github.com/RackSec/srslog v0.0.0-20180709174129-a4725f04ec91/go.mod h1:cDLGBht23g0XQdLjzn6xOGXDkLK182YfINAaZEQLCHQ=
 github.com/akamensky/argparse v1.3.1 h1:kP6+OyvR0fuBH6UhbE6yh/nskrDEIQgEA1SUXDPjx4g=
 github.com/akamensky/argparse v1.3.1/go.mod h1:S5kwC7IuDcEr5VeXtGPRVZ5o/FdhcMlQz4IZQuw64xA=
-github.com/albenik/go-serial/v2 v2.4.0 h1:2yIM9C0l0YznmMbHF8Yw+j0XY1ZDy5YciqhGdOik6r8=
+github.com/albenik/go-serial/v2 v2.5.1 h1:nnnyjuwIJLdih8yJyrncLFLQtGCnIppLcTNNtPg+ME0=
-github.com/albenik/go-serial/v2 v2.4.0/go.mod h1:JUrQKdczCMB0FlXt2rlJJ8zbfFzmjTIAkLPyyVfr5ho=
+github.com/albenik/go-serial/v2 v2.5.1/go.mod h1:ySdCqoERscw1xluK1n62R8Faoyu+jXKwVHPa1lSSAew=
-github.com/aws/aws-sdk-go v1.25.31/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
+github.com/aws/aws-sdk-go v1.44.24/go.mod h1:y4AeaBuwd2Lk+GepC1E9v0qOiTws0MIWAX4oIKwKHZo=
-github.com/aws/aws-sdk-go v1.32.11/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
 github.com/creack/goselect v0.1.2 h1:2DNy14+JPjRBgPzAd1thbQp4BSIihxcBf0IXhQXDRa0=
 github.com/creack/goselect v0.1.2/go.mod h1:a/NhLweNvqIYMuxcMOuWY516Cimucms3DglDzQP3hKY=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/go-playground/ansi/v3 v3.0.0 h1:TXexAx1sXuL/N/cqV472ffRdkoiqPA3LeKMXCoz8t4Y=
-github.com/go-playground/ansi/v3 v3.0.0/go.mod h1:btm11Vjtjy20mZiJwufDvdVAVxjLuYFDu164b83ekBs=
 github.com/go-playground/assert v1.2.1/go.mod h1:Lgy+k19nOB/wQG/fVSQ7rra5qYugmytMQqvQ2dgjWn8=
 github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
-github.com/go-playground/errors/v5 v5.0.1/go.mod h1:p7HVwyH3I0esuPnvChd2Uf4ceZwG2GcaDT/KpzCN18M=
+github.com/go-playground/errors/v5 v5.2.3 h1:RPxaFHgJZjgk/OFkUcfytJgRQKRINLtueVxgOdnfPpg=
-github.com/go-playground/errors/v5 v5.1.1 h1:H/igfatbYnCqa4Xednb1nnxljpPWnogA4TgsA4U891I=
+github.com/go-playground/errors/v5 v5.2.3/go.mod h1:DincxRGwraWmq39TZDqtnOtHGOJ+AbNbO0OmBzX6MLw=
-github.com/go-playground/errors/v5 v5.1.1/go.mod h1:xyrVVz3LrfHZQmZQ1ri/8rdiis2F96q15wGX89xWsL0=
-github.com/go-playground/form/v4 v4.0.0/go.mod h1:bodWfd97U9PVMZFcDsbVzSbQQTtaWrebnTwQtWjSW1M=
 github.com/go-playground/form/v4 v4.1.1/go.mod h1:q1a2BY+AQUUzhl6xA/6hBetay6dEIhMHjgvJiGo6K7U=
-github.com/go-playground/log/v7 v7.0.2 h1:jHdecwWiVlQsOr9CKnAy1yjlwMTXITwUB2Tb3jVUrfU=
+github.com/go-playground/form/v4 v4.2.0/go.mod h1:q1a2BY+AQUUzhl6xA/6hBetay6dEIhMHjgvJiGo6K7U=
-github.com/go-playground/log/v7 v7.0.2/go.mod h1:AWMsaRSXCVhwbCSvvchHqQfyREAODmWrX435KTjpuYU=
+github.com/go-playground/log/v8 v8.0.1 h1:yclpYIMZ49kTwtRZsmFlPRr/mmgBrRAXzC7FcZn9jmM=
-github.com/go-playground/pkg/v4 v4.0.0 h1:0lTr9H8RyCwom4TcfNhMCNvlTlFuin7uUlXcZQuxrA4=
+github.com/go-playground/log/v8 v8.0.1/go.mod h1:G6XdEdQBItRKCi6XtQ2CMSkyP81AScSQEnNqKzknaT4=
-github.com/go-playground/pkg/v4 v4.0.0/go.mod h1:TLowM3d3a/m04JlHK/zM6Ia8zf8+0C/9pTwhDEUqKO0=
 github.com/go-playground/pkg/v5 v5.0.0/go.mod h1:0380E0lsFB1POWFypOLL8tX2f0O1OBCBpSdVmEy4mg0=
-github.com/go-playground/pkg/v5 v5.3.0 h1:G+DOJRqMoQTpnSGEjc1rWat6pE4EKp7ejM3udkjCi78=
+github.com/go-playground/pkg/v5 v5.6.0 h1:97YpRFzIcS5NFP2Uzxj8cPYz4zTuwweyXADYcA1KfUQ=
-github.com/go-playground/pkg/v5 v5.3.0/go.mod h1:HXedFsSf7dogjVi5wmbOK7P+doyvzvLYMNlyX+PfGZI=
+github.com/go-playground/pkg/v5 v5.6.0/go.mod h1:TvZ2nNtNh6VfoNteY9ApA2BXt1ZwJliFZ4hzPAwLS9Y=
-github.com/go-sql-driver/mysql v1.5.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
+github.com/jmespath/go-jmespath v0.4.0/go.mod h1:T8mJZnbsbmF+m6zOOFylbeCJqk5+pHWvzYPziyZiYoo=
-github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
+github.com/jmespath/go-jmespath/internal/testify v1.5.1/go.mod h1:L3OGu8Wl2/fWfCI6z80xFu9LTZmf1ZRjMHUOPmWr69U=
-github.com/jmespath/go-jmespath v0.3.0/go.mod h1:9QtRXoHjLGCJ5IBSaohpXITPlowMeeYCZ7fLUTSywik=
 github.com/k0kubun/go-ansi v0.0.0-20180517002512-3bf9e2903213/go.mod h1:vNUNkEQ1e29fT/6vq2aBdFsgNPmy8qMdSay1npru+Sw=
 github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
@@ -40,7 +32,6 @@ github.com/mattn/go-runewidth v0.0.13 h1:lTGmDsbAYt5DmK6OnoV7EuIF1wEIFAcxld6ypU4
 github.com/mattn/go-runewidth v0.0.13/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db h1:62I3jR2EmQ4l5rM/4FEfDWcRD+abF5XlKShorW5LRoQ=
 github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db/go.mod h1:l0dey0ia/Uv7NcFFVbCLtqEBQbrT4OCwCSKTEv6enCw=
-github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
@@ -48,31 +39,23 @@ github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/schollz/progressbar/v3 v3.8.3 h1:FnLGl3ewlDUP+YdSwveXBaXs053Mem/du+wr7XSYKl8=
 github.com/schollz/progressbar/v3 v3.8.3/go.mod h1:pWnVCjSBZsT2X3nx9HfRdnCDrpbevliMeoEVhStwHko=
-github.com/segmentio/errors-go v1.0.0/go.mod h1:RDVEREUrpa4/jM8rt5KsQpu+JoXPi6i07vG7m4tX0MY=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
-github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/atomic v1.9.0 h1:ECmE8Bn/WFTYwEW/bpKD3M8VtR/zQVbavAoalC1PYyE=
 go.uber.org/atomic v1.9.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
-go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
 go.uber.org/multierr v1.7.0 h1:zaiO/rmgFjbmCXdSYJWQcdvOCsthmdaHfr3Gm2Kx4Ec=
 go.uber.org/multierr v1.7.0/go.mod h1:7EAYxJLBy9rStEaz58O2t4Uvip6FSURkq8/ppBp95ak=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3 h1:0es+/5331RGQPcXlMfP+WrnIIS6dNnNRe0WB02W0F4M=
 golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
-golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
-golang.org/x/sys v0.0.0-20190509141414-a5b02f93d862/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210223212115-eede4237b368/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210910150752-751e447fb3d0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -80,16 +63,16 @@ golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e h1:fLOSk5Q00efkSvAm+4xcoXD+R
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210615171337-6886f2dfbf5b/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 h1:JGgROgKl9N8DuW20oFS5gxc+lE67/N3FcwmBPMe7ArY=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
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 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
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 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc/go.mod h1:m7x9LTH6d71AHyAX77c9yqWCCa3UKHcVEj9y7hAtKDk=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
-gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df/go.mod h1:LRQQ+SO6ZHR7tOkpBDuZnXENFzX8qRjMDMyPD6BRkCw=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -1,14 +1,14 @@
 // Copyright 2021 Torsten Harenberg DL1THM. All rights reserved.
 
-// A SCS PACTOR modem flashing utility written in Go. Should run anywhere Go runs.
+// A SCS PACTOR modem flashing utility written in Go. Should run everywhere Go runs.
 
 package main
 
 import (
+	"bytes"
 	"fmt"
 	"github.com/akamensky/argparse"
-	"github.com/go-playground/log/v7"
+	"github.com/go-playground/log/v8"
-	"github.com/go-playground/log/v7/handlers/console"
 	"go-scsupdate/firmware"
 	"go-scsupdate/update"
 	"go-scsupdate/usb"
@@ -24,9 +24,9 @@ func main() {
 	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 the 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)
+	buff := new(bytes.Buffer)
+	cLog := log.NewConsoleBuilder().WithWriter(buff).Build()
 	if *debug {
 		log.AddHandler(cLog, log.AllLevels...)
 		log.Debug("DEBUG logging enabled")
@@ -34,10 +34,6 @@ 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")
 	}
@@ -90,9 +86,9 @@ func main() {
 	if *dryrun != true {
 		var err error
 		if *serialDevice != "" {
-			err = update.Update(*serialDevice, baudrate, *sertimeout, *f, *force)
+			err = update.Update(*serialDevice, baudrate, *f, *force)
 		} else {
-			err = update.Update(ports[0].Port, baudrate, *sertimeout, *f, *force)
+			err = update.Update(ports[0].Port, baudrate, *f, *force)
 		}
 		if err != nil {
 			log.Panic(err)

update/update.go

@@ -6,7 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"github.com/albenik/go-serial/v2"
-	"github.com/go-playground/log/v7"
+	"github.com/go-playground/log/v8"
 	"github.com/schollz/progressbar/v3"
 	"io/ioutil"
 	"os"
@@ -25,14 +25,14 @@ type modem struct {
 }
 
 // initmodem: opens the serial line, returns instance of serial.Port
-func initmodem(serport string, baudrate int, sertimeout int) (*modem, error) {
+func initmodem(serport string, baudrate int) (*modem, error) {
 	p, err := serial.Open(serport,
 		serial.WithBaudrate(baudrate),
 		serial.WithDataBits(8),
 		serial.WithParity(serial.NoParity),
 		serial.WithStopBits(serial.OneStopBit),
-		serial.WithReadTimeout(sertimeout),
+		serial.WithReadTimeout(-1),  //blocking I/O, see https://pkg.go.dev/github.com/albenik/go-serial#Port
-		serial.WithWriteTimeout(sertimeout))
+		serial.WithWriteTimeout(-1)) //blocking I/O
 	if err != nil {
 		fmt.Printf("ERROR: File %s could not be opened\n", serport)
 		return nil, err
@@ -41,9 +41,10 @@ func initmodem(serport string, baudrate int, sertimeout int) (*modem, error) {
 	return m, nil
 }
 
-// write: writes to the serial ports, returns answer and logs output
+// write: writes to the serial ports, returns answer and logs output. Optional toread forces a
-func (m *modem) write(out string, nolog ...bool) ([]byte, error) {
+// certain number of bytes to read
-	if len(nolog) == 0 {
+func (m *modem) write(out string, toread ...uint32) ([]byte, error) {
+	if len(toread) == 0 {
 		log.Debug("Sending " + strings.TrimFunc(out, func(r rune) bool {
 			return !unicode.IsGraphic(r)
 		}))
@@ -52,18 +53,37 @@ func (m *modem) write(out string, nolog ...bool) ([]byte, error) {
 			log.Debugf("Sending %d byte(s)", len(out))
 		}
 	}
-	_, err := m.port.Write([]byte(out))
+	for {
+		status, err := m.port.GetModemStatusBits()
 		if err != nil {
-		log.Errorf("ERROR while sending serial command: %s\n", out)
+			log.Fatal("GetModemStatusBits failed")
-		log.Error(err)
-		return []byte(""), err
 		}
-	buff := make([]byte, 1024)
+		if status.CTS {
-	if len(nolog) == 0 {
+			for {
-		time.Sleep(50 * time.Millisecond) // give the PTC some time to answer, no needed with binary
+				sent, err := m.port.Write([]byte(out))
+				if err == nil {
+					break
+				} else {
+					//					log.Errorf("ERROR while sending serial command: %s\n", out)
+					log.Debug(err)
+					out = out[sent:]
 				}
+			}
+			break
+		}
+	}
+	var btr uint32
+	if len(toread) == 0 {
+		time.Sleep(80 * time.Millisecond) // give the PTC some time to answer, no needed with binary
+		btr, _ = m.port.ReadyToRead()
+		if btr == 0 {
+			return []byte(""), nil
+		}
+	} else {
+		btr = toread[0]
+	}
+	buff := make([]byte, btr)
 	n, err := m.port.Read(buff)
-	// fmt.Printf("Read %d bytes\n", n)
 	if err != nil {
 		log.Errorf("ERROR: cannot read answer from command: %s\n", out)
 		return []byte(""), err
@@ -103,27 +123,29 @@ func (m *modem) setDateTime() error {
 
 // writeUpdate: main flash utility. Writes the firmware taken from fwfile to the modem. Write progress bar.
 func (m *modem) writeUpdate(fwfile string) error {
+	m.port.SetWriteTimeout(-50)
+	m.port.SetReadTimeout(-1)
 	_, err := m.write("UPDATE\r")
 	if err != nil {
-		_, _ = m.write("\033", true) // send ESC to cancel the update
+		_, _ = m.write("\033") // send ESC to cancel the update
 		return err
 	}
-	answer, err := m.write("\006", true)
+	answer, err := m.write("\006")
 	if err != nil {
-		_, _ = m.write("\033", true) // send ESC to cancel the update
+		fmt.Println(err)
+		_, _ = m.write("\033") // send ESC to cancel the update
 		return err
 	}
-
 	log.Debugf("flash stamp: % X", binary.LittleEndian.Uint32(answer[2:6]))
 	flashId := binary.LittleEndian.Uint16(answer[0:2])
 	log.Debugf("flash id: % X", flashId)
 	if flashId != 0xa41f && flashId != 0x5b1f && flashId != 0xda1f {
-		_, _ = m.write("\033", true) // send ESC to cancel the update
+		_, _ = m.write("\033") // send ESC to cancel the update
 		return errors.New("wrong flash id")
 	}
 	r, err := os.Open(fwfile)
 	if err != nil {
-		_, _ = m.write("\033", true) // send ESC to cancel the update
+		_, _ = m.write("\033") // send ESC to cancel the update
 		return err
 	}
 	fstat, _ := r.Stat()
@@ -132,7 +154,7 @@ func (m *modem) writeUpdate(fwfile string) error {
 
 	fwblob, err := ioutil.ReadFile(fwfile)
 	if err != nil {
-		_, _ = m.write("\033", true) // send ESC to cancel the update
+		_, _ = m.write("\033") // send ESC to cancel the update
 		return err
 	}
 	//	fmt.Println(fsize)
@@ -140,20 +162,20 @@ func (m *modem) writeUpdate(fwfile string) error {
 	if fsize%256 != 0 {
 		chunks++
 	}
-
 	// send ACK
-	_, err = m.write("\006", true)
+	_, err = m.write("\006")
 	if err != nil {
-		_, _ = m.write("\033", true) // send ESC to cancel the update
+		_, _ = m.write("\033") // send ESC to cancel the update
 		return err
 	}
 
 	// send number of chunks
 	a := make([]byte, 2)
 	binary.BigEndian.PutUint16(a, chunks)
-	res, err := m.write(string(a), true)
+	res, err := m.write(string(a))
 	if err != nil || string(res) != "\006" { //no ACK
-		_, _ = m.write("\033", true) // send ESC to cancel the update
+		fmt.Println("kein ACK")
+		_, _ = m.write("\033") // send ESC to cancel the update
 		return err
 	}
 
@@ -168,15 +190,15 @@ func (m *modem) writeUpdate(fwfile string) error {
 		} else {
 			sendbuff = string(fwblob[i*CHUNKSIZE : i*CHUNKSIZE+CHUNKSIZE])
 		}
-		res, err = m.write(sendbuff, true)
+		res, err = m.write(sendbuff, 1)
 		if err != nil || string(res) != "\006" { //no ACK
-			_, _ = m.write("\033", true) // send ESC to cancel the update
 			log.Errorf("Error in Handshake! Rx: %s", hex.EncodeToString(res))
+			_, _ = m.write("\033") // send ESC to cancel the update
 			return err
 		}
 	}
 	log.Infof("Firmware file %s successfully written", fwfile)
-	_, err = m.write("\r", true)
+	_, err = m.write("\r")
 	if err != nil {
 		log.Error("Error in Handshake: cannot send final cr")
 	}
@@ -226,8 +248,8 @@ func (m *modem) checkFirmwareFits(fwfile string) error {
 }
 
 // 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 {
+func Update(serport string, baudrate int, fwfile string, force bool) error {
-	m, err := initmodem(serport, baudrate, sertimeout)
+	m, err := initmodem(serport, baudrate)
 	defer m.port.Close()
 	if err != nil {
 		return errors.New("FEHLER in Update")

usb/usb.go

@@ -3,7 +3,7 @@ package usb
 import (
 	"errors"
 	enumerator2 "github.com/albenik/go-serial/v2/enumerator"
-	"github.com/go-playground/log/v7"
+	"github.com/go-playground/log/v8"
 )
 
 /*