example_test.go

Documentation: golang.org/x/exp/io/spi

     1  // Copyright 2016 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package spi_test
     6  
     7  import "golang.org/x/exp/io/spi"
     8  
     9  // Example illustrates a program that drives an APA-102 LED strip.
    10  func Example() {
    11  	dev, err := spi.Open(&spi.Devfs{
    12  		Dev:      "/dev/spidev0.1",
    13  		Mode:     spi.Mode3,
    14  		MaxSpeed: 500000,
    15  	})
    16  	if err != nil {
    17  		panic(err)
    18  	}
    19  	defer dev.Close()
    20  
    21  	if err := dev.Tx([]byte{
    22  		0, 0, 0, 0,
    23  		0xff, 200, 0, 200,
    24  		0xff, 200, 0, 200,
    25  		0xe0, 200, 0, 200,
    26  		0xff, 200, 0, 200,
    27  		0xff, 8, 50, 0,
    28  		0xff, 200, 0, 0,
    29  		0xff, 0, 0, 0,
    30  		0xff, 200, 0, 200,
    31  		0xff, 0xff, 0xff, 0xff,
    32  		0xff, 0xff, 0xff, 0xff,
    33  		0xff, 0xff, 0xff, 0xff,
    34  		0xff, 0xff, 0xff, 0xff,
    35  	}, nil); err != nil {
    36  		panic(err)
    37  	}
    38  }
    39
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