build: remove d2xx dependency for periph.io

Dockerfile

@@ -9,7 +9,7 @@ ADD . .
 RUN GOOS=$(echo $TARGETPLATFORM | cut -f1 -d/) && \
     GOARCH=$(echo $TARGETPLATFORM | cut -f2 -d/) && \
     GOARM=$(echo $TARGETPLATFORM | cut -f3 -d/ | sed "s/v//" ) && \
-    CGO_ENABLED=0 GOOS=${GOOS} GOARCH=${GOARCH} GOARM=${GOARM} go build -mod vendor -tags netgo ./cmd/rc-pca9685/
+    CGO_ENABLED=0 GOOS=${GOOS} GOARCH=${GOARCH} GOARM=${GOARM} go build -mod vendor -tags netgo,no_d2xx ./cmd/rc-pca9685/
 
 
 FROM gcr.io/distroless/static

go.mod

@@ -15,9 +15,9 @@ require (
 
 require (
 	github.com/gorilla/websocket v1.4.2 // indirect
-	github.com/konsorten/go-windows-terminal-sequences v1.0.1 // indirect
+	github.com/stretchr/testify v1.6.1 // indirect
 	golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0 // indirect
 	golang.org/x/sys v0.0.0-20210525143221-35b2ab0089ea // indirect
 	google.golang.org/protobuf v1.26.0 // indirect
-	periph.io/x/d2xx v0.0.1 // indirect
+	periph.io/x/d2xx v0.0.3 // indirect
 )

go.sum

@@ -4,64 +4,59 @@ github.com/Microsoft/go-winio v0.4.11/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcy
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@@ -77,10 +72,7 @@ github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
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@@ -88,9 +80,10 @@ github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+
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@@ -98,7 +91,6 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/image v0.0.0-20210220032944-ac19c3e999fb/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
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@@ -108,8 +100,6 @@ golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5h
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@@ -117,9 +107,12 @@ golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7w
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+golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180810170437-e96c4e24768d/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180828015842-6cd1fcedba52/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
@@ -130,18 +123,20 @@ google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQ
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
-gopkg.in/go-playground/assert.v1 v1.2.1/go.mod h1:9RXL0bg/zibRAgZUYszZSwO/z8Y/a8bDuhia5mkpMnE=
-gopkg.in/go-playground/validator.v9 v9.29.1/go.mod h1:+c9/zcJMFNgbLvly1L1V+PpxWdVbfP1avr/N00E2vyQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gotest.tools v0.0.0-20181223230014-1083505acf35/go.mod h1:R//lfYlUuTOTfblYI3lGoAAAebUdzjvbmQsuB7Ykd90=
 honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 periph.io/x/conn/v3 v3.6.8 h1:fnNSwSoKPzpoLOSxml70EInaP6YrrqcucP3KDfNxpmU=
 periph.io/x/conn/v3 v3.6.8/go.mod h1:3OD27w9YVa5DS97VsUxsPGzD9Qrm5Ny7cF5b6xMMIWg=
-periph.io/x/d2xx v0.0.1 h1:7iCO/aVK6k9GSZ45DcpMU8sOOcVLCqO/cheSm7nMUG0=
 periph.io/x/d2xx v0.0.1/go.mod h1:38Euaaj+s6l0faIRHh32a+PrjXvxFTFkPBEQI0TKg34=
+periph.io/x/d2xx v0.0.3 h1:BE8XcIdxabu9ZzAr1UXxSz88T9Txki6Xyo8aJ1qZvks=
+periph.io/x/d2xx v0.0.3/go.mod h1:38Euaaj+s6l0faIRHh32a+PrjXvxFTFkPBEQI0TKg34=
 periph.io/x/devices/v3 v3.6.11 h1:1BtnoM1tP6tWdJc0nSwMnTg33HXoSn6MX3bUycGyV/A=
 periph.io/x/devices/v3 v3.6.11/go.mod h1:IMAwLNCAspcOhWed1siiZYlFlj2btxp9XIPBzzgNIvQ=
 periph.io/x/host/v3 v3.7.0 h1:9CP/j0FcJmR+PRHlNzAmhV6Mt3GXoWnPmRhknJlQhnE=

vendor/modules.txt

@@ -16,11 +16,11 @@ github.com/golang/protobuf/ptypes/timestamp
 # github.com/gorilla/websocket v1.4.2
 ## explicit; go 1.12
 github.com/gorilla/websocket
-# github.com/konsorten/go-windows-terminal-sequences v1.0.1
-## explicit
 # github.com/sirupsen/logrus v1.8.1
 ## explicit; go 1.13
 github.com/sirupsen/logrus
+# github.com/stretchr/testify v1.6.1
+## explicit; go 1.13
 # golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0
 ## explicit; go 1.11
 golang.org/x/net/internal/socks
@@ -75,7 +75,7 @@ periph.io/x/conn/v3/pin
 periph.io/x/conn/v3/pin/pinreg
 periph.io/x/conn/v3/spi
 periph.io/x/conn/v3/spi/spireg
-# periph.io/x/d2xx v0.0.1
+# periph.io/x/d2xx v0.0.3
 ## explicit; go 1.13
 periph.io/x/d2xx
 # periph.io/x/devices/v3 v3.6.11

vendor/periph.io/x/d2xx/README.md

@@ -3,9 +3,6 @@
 Package d2xx is a thin Go wrapper for the Future Technology "D2XX" driver at
 https://ftdichip.com/drivers/d2xx-drivers/.
 
-See https://periph.io/device/ftdi/ for more details, and how to configure
-the host to be able to use this driver.
-
 This package is not Go idiomatic. You will want to use
 https://periph.io/x/host/v3/ftdi (or later) instead.
 
@@ -14,3 +11,34 @@ But if you really want, here it goes:
 
 This Go package includes third party software. See
 [third_party/README.md](third_party/README.md).
+
+## Configuration
+
+See https://periph.io/device/ftdi/ to configure the host to be able to use this
+driver.
+
+## Availability
+
+On darwin_amd64, linux_amd64 linux_arm (v6, v7 compatible) and linux_arm64 (v8),
+cgo is required. If cgo is disabled (via `CGO_ENABLED=0`), all functions in this
+driver return error [NoCGO](https://periph.io/x/d2xx#NoCGO).
+
+On Windows, cgo is not required. If the dynamic library is not found at runtime,
+[Missing](https://periph.io/x/d2xx#Missing) is returned.
+
+## bcm2385
+
+On linux_arm (v6), hard-float is required. For cross compilation, this
+means arm-linux-gnueabihf-gcc is preferred to arm-linux-gnueabi-gcc. Using
+hardfloat causes a segfault on Raspberry Pi 1, Zero and Zero Wireless. It is
+recommended to disable this driver if targeting these hosts, see below.
+
+## Disabling
+
+To disable this driver, build with tag `no_d2xx`, e.g.
+
+```
+go install -tags no_d2xx periph.io/x/cmd/gpio-list@latest
+```
+
+This will behave has if cgo was disabled, even on Windows.

vendor/periph.io/x/d2xx/d2xx.go

@@ -14,9 +14,8 @@ type Err int
 // These are additional synthetic error codes.
 const (
 	// NoCGO is returned when the package was compiled without cgo, thus the d2xx
-	// library is unavailable.
+	// library is unavailable or the library was disabled via the `no_d2xx` build
-	//
+	// tag.
-	// This is never returned on Windows.
 	NoCGO Err = -2
 	// Missing is returned when the dynamic library is not available.
 	Missing Err = -1
@@ -117,16 +116,30 @@ type Handle interface {
 var _ Handle = handle(0)
 
 // Version returns the library's version.
+//
+// 0, 0, 0 is returned if the library is unavailable.
 func Version() (uint8, uint8, uint8) {
 	return version()
 }
 
 // CreateDeviceInfoList discovers the currently found devices.
+//
+// If the driver is disabled via build tag `no_d2xx`, or on posix
+// `CGO_ENABLED=0` environment variable, NoCGO is returned.
+//
+// On Windows, Missing is returned if the dynamic library is not found at
+// runtime.
 func CreateDeviceInfoList() (int, Err) {
 	return createDeviceInfoList()
 }
 
 // Open opens the ith device discovered.
+//
+// If the driver is disabled via build tag `no_d2xx`, or on posix
+// `CGO_ENABLED=0` environment variable, NoCGO is returned.
+//
+// On Windows, Missing is returned if the dynamic library is not found at
+// runtime.
 func Open(i int) (Handle, Err) {
 	return open(i)
 }

vendor/periph.io/x/d2xx/d2xx_darwin_amd64.go

@@ -3,6 +3,7 @@
 // that can be found in the LICENSE file.
 
 // +build cgo
+// +build !no_d2xx
 
 package d2xx
 

vendor/periph.io/x/d2xx/d2xx_linux_amd64.go

@@ -3,10 +3,11 @@
 // that can be found in the LICENSE file.
 
 // +build cgo
+// +build !no_d2xx
 
 package d2xx
 
 /*
-#cgo LDFLAGS: ${SRCDIR}/third_party/libftd2xx_linux_amd64_v1.4.6.a
+#cgo LDFLAGS: ${SRCDIR}/third_party/libftd2xx_linux_amd64_v1.4.24.a
 */
 import "C"

vendor/periph.io/x/d2xx/d2xx_linux_arm.go

@@ -3,6 +3,7 @@
 // that can be found in the LICENSE file.
 
 // +build cgo
+// +build !no_d2xx
 
 package d2xx
 
@@ -10,6 +11,6 @@ package d2xx
 // optimal ARM architecture.
 
 /*
-#cgo LDFLAGS: ${SRCDIR}/third_party/libftd2xx_linux_arm6hf_v1.4.6.a
+#cgo LDFLAGS: ${SRCDIR}/third_party/libftd2xx_linux_arm6hf_v1.4.24.a
 */
 import "C"

vendor/periph.io/x/d2xx/d2xx_linux_arm64.go

@@ -0,0 +1,13 @@
+// Copyright 2021 The Periph Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+// +build cgo
+// +build !no_d2xx
+
+package d2xx
+
+/*
+#cgo LDFLAGS: ${SRCDIR}/third_party/libftd2xx_linux_arm64_v1.4.24.a
+*/
+import "C"

vendor/periph.io/x/d2xx/d2xx_posix.go

@@ -2,7 +2,9 @@
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
+// +build cgo
 // +build !windows
+// +build !no_d2xx
 
 package d2xx
 

vendor/periph.io/x/d2xx/d2xx_posix_no_cgo.go

@@ -2,8 +2,8 @@
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
-// +build !cgo
+// +build !cgo no_d2xx
-// +build !windows
+// +build !windows no_d2xx
 
 package d2xx
 

vendor/periph.io/x/d2xx/d2xx_posix_other.go

@@ -7,9 +7,12 @@
 // +build !linux,!amd64
 // +build !linux,!arm
 // +build !windows
+// +build !no_d2xx
 
 package d2xx
 
+// This assumes the library is installed and available for linking.
+
 /*
 #cgo LDFLAGS: -lftd2xx
 */

vendor/periph.io/x/d2xx/d2xx_windows.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
+// +build !no_d2xx
+
 package d2xx
 
 import (
@@ -22,15 +24,21 @@ func version() (uint8, uint8, uint8) {
 }
 
 func createDeviceInfoList() (int, Err) {
-	var num uint32
+	if pCreateDeviceInfoList != nil {
-	r1, _, _ := pCreateDeviceInfoList.Call(uintptr(unsafe.Pointer(&num)))
+		var num uint32
-	return int(num), Err(r1)
+		r1, _, _ := pCreateDeviceInfoList.Call(uintptr(unsafe.Pointer(&num)))
+		return int(num), Err(r1)
+	}
+	return 0, Missing
 }
 
 func open(i int) (Handle, Err) {
 	var h handle
-	r1, _, _ := pOpen.Call(uintptr(i), uintptr(unsafe.Pointer(&h)))
+	if pOpen != nil {
-	return h, Err(r1)
+		r1, _, _ := pOpen.Call(uintptr(i), uintptr(unsafe.Pointer(&h)))
+		return h, Err(r1)
+	}
+	return h, Missing
 }
 
 func (h handle) Close() Err {

vendor/periph.io/x/d2xx/doc.go

@@ -5,9 +5,9 @@
 // Package d2xx is a thin Go wrapper for the Future Technology "D2XX" driver.
 //
 // This package is not Go idiomatic. You want to use
-// https://periph.io/x/host/v3/ftdi instead.
+// https://periph.io/x/host/v3/ftdi (or later) instead.
 //
-// A binary copy of the d2xx driver is included for linux and macOS. They are
+// A static library of the d2xx driver is included for linux and macOS. They are
 // from https://ftdichip.com/drivers/d2xx-drivers/. See third_party/README.md
 // for more details.
 //
@@ -15,7 +15,4 @@
 //
 // See https://periph.io/device/ftdi/ for more details, and how to configure
 // the host to be able to use this driver.
-//
-// Windows 10 automatically fetches the driver from Windows Update upon
-// connecting a FTDI device on the firt time, so no need to download a driver.
 package d2xx

vendor/periph.io/x/d2xx/test.sh

@@ -4,8 +4,6 @@
 # that can be found in the LICENSE file.
 
 # Builds the package on multiple OSes to confirm it builds fine.
-#
-# It is recommended to use the -i flag so subsequent runs are much faster.
 
 set -eu
 
@@ -13,13 +11,33 @@ cd `dirname $0`
 
 OPT=$*
 
+# Do not set CGO_ENABLED, as we want the default behavior when cross compiling,
+# which is different from when CGO_ENABLED=1.
+export -n CGO_ENABLED
+
+# Cleanup.
+export -n GOOS
+export -n GOARCH
+
 function build {
-  echo "Testing on $1/$2"
+  export GOOS=$1
-  GOOS=$1 GOARCH=$2 go build $OPT
+  export GOARCH=$2
+  echo "Building on $GOOS/$GOARCH"
+  go build $OPT
+  echo "Building on $GOOS/$GOARCH - no_d2xx"
+  go build -tags no_d2xx $OPT
+  echo "Building on $GOOS/$GOARCH - no cgo"
+  CGO_ENABLED=0 go build $OPT
+  echo "Building on $GOOS/$GOARCH - no cgo, no_d2xx"
+  CGO_ENABLED=0 go build -tags no_d2xx $OPT
 }
 
-build darwin amd64
+CGO_ENABLED=1 CC=x86_64-linux-gnu-gcc build linux amd64
-build linux amd64
+# Requires: sudo apt install gcc-arm-linux-gnueabihf
-build linux arm
+CGO_ENABLED=1 CC=arm-linux-gnueabihf-gcc build linux arm
+# Requires: sudo apt install gcc-aarch64-linux-gnu
+CGO_ENABLED=1 CC=aarch64-linux-gnu-gcc build linux arm64
+
 build linux 386
 build windows amd64
+build darwin amd64