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example_test.go
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example_test.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 conn_test
import (
"fmt"
"log"
"periph.io/x/conn/v3/driver/driverreg"
"periph.io/x/conn/v3/physic"
"periph.io/x/conn/v3/spi"
"periph.io/x/conn/v3/spi/spireg"
)
func Example() {
// Make sure periph is initialized.
// TODO: Use host.Init(). It is not used in this example to prevent circular
// go package import.
if _, err := driverreg.Init(); err != nil {
log.Fatal(err)
}
// Using SPI as an example. See package ./spi/spireg for more details.
p, err := spireg.Open("")
if err != nil {
log.Fatal(err)
}
defer p.Close()
c, err := p.Connect(physic.MegaHertz, spi.Mode3, 8)
if err != nil {
log.Fatal(err)
}
// Write 0x10 to the device, and read a byte right after.
write := []byte{0x10, 0x00}
read := make([]byte, len(write))
if err := c.Tx(write, read); err != nil {
log.Fatal(err)
}
// Use read.
fmt.Printf("%v\n", read[1:])
}