First implementation

vendor/periph.io/x/periph/host/beagle/black/black.go

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+// Copyright 2018 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.
+
+// Package black implements headers for the BeagleBone Black and BeagleBone
+// Black Wireless micro-computers.
+//
+// Reference
+//
+// https://beagleboard.org/black
+//
+// Datasheet
+//
+// https://elinux.org/Beagleboard:BeagleBoneBlack
+//
+// https://github.com/CircuitCo/BeagleBone-Black/blob/rev_b/BBB_SRM.pdf
+//
+// https://elinux.org/Beagleboard:Cape_Expansion_Headers
+package black
+
+import (
+	"strings"
+
+	"periph.io/x/periph/host/distro"
+)
+
+// Present returns true if the host is a BeagleBone Black or BeagleBone Black
+// Wireless.
+func Present() bool {
+	if isArm {
+		return strings.HasPrefix(distro.DTModel(), "TI AM335x BeagleBone Black")
+	}
+	return false
+}

vendor/periph.io/x/periph/host/beagle/black/black_arm.go

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+// Copyright 2018 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.
+
+package black
+
+const isArm = true

vendor/periph.io/x/periph/host/beagle/black/black_other.go

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+// Copyright 2018 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 !arm
+
+package black
+
+const isArm = false