mirror of https://github.com/kidoman/embd
46 lines
861 B
Go
46 lines
861 B
Go
// +build ignore
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// this sample uses the mcp3008 package to interface with the 8-bit ADC and works without code change on bbb and rpi
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package main
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import (
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"flag"
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"fmt"
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"time"
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"github.com/kidoman/embd"
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"github.com/kidoman/embd/convertors/mcp3008"
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_ "github.com/kidoman/embd/host/all"
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)
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const (
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channel = 0
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speed = 1000000
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bpw = 8
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delay = 0
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)
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func main() {
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flag.Parse()
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fmt.Println("this is a sample code for mcp3008 10bit 8 channel ADC")
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if err := embd.InitSPI(); err != nil {
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panic(err)
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}
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defer embd.CloseSPI()
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spiBus := embd.NewSPIBus(embd.SPIMode0, channel, speed, bpw, delay)
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defer spiBus.Close()
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adc := mcp3008.New(mcp3008.SingleMode, spiBus)
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for i := 0; i < 20; i++ {
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time.Sleep(1 * time.Second)
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val, err := adc.AnalogValueAt(0)
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if err != nil {
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panic(err)
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}
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fmt.Printf("analog value is: %v\n", val)
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}
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}
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