mirror of https://github.com/kidoman/embd
113 lines
2.1 KiB
Go
113 lines
2.1 KiB
Go
package main
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import (
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"bufio"
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"fmt"
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"log"
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"os"
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"time"
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"github.com/kidoman/embd"
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_ "github.com/kidoman/embd/host/rpi"
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"github.com/kidoman/embd/sensor/mcp9808"
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"github.com/stianeikeland/go-rpio"
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)
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func main() {
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if err := embd.InitI2C(); err != nil {
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panic(err)
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}
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defer embd.CloseI2C()
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bus := embd.NewI2CBus(1)
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therm := mcp9808.New(bus)
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if id, err := therm.ManufacturerID(); err == nil {
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fmt.Printf("Manufacturer ID: 0x%x\n", id)
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}
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if devID, rev, err := therm.DeviceID(); err == nil {
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fmt.Printf("Device ID: 0x%x rev. 0x%x\n", devID, rev)
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}
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therm.SetShutdownMode(false)
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//therm.SetWindowTempLock(false)
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// therm.SetCriticalTempLock(false)
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config, err := therm.WriteConfig()
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if err != nil {
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panic(err)
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}
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fmt.Printf("New Config: %b\n", config)
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therm.SetAlertControl(true)
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//therm.SetInterruptClear(true)
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//therm.SetAlertStatus(true)
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//therm.SetAlertSelect(false)
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//therm.SetAlertPolarity(true)
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//therm.SetAlertMode(true)
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config, err = therm.WriteConfig()
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if err != nil {
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panic(err)
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}
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fmt.Printf("New Config: %b\n", config)
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if err := therm.SetWindowTempUpper(TempFToC(80)); err != nil {
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panic(err)
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}
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temp, err := therm.AmbientTemp()
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if err != nil {
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panic(err)
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}
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fmt.Printf("Temp is %f\n", TempCToF(temp.CelsiusDeg))
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if err := embd.InitGPIO(); err != nil {
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panic(err)
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}
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if err := rpio.Open(); err != nil {
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log.Fatalf("Error: %v\n", err)
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}
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defer rpio.Close()
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defer embd.CloseGPIO()
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alert := rpio.Pin(4)
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alert.Input()
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alert.PullDown()
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timer := time.Tick(time.Duration(5) * time.Second)
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cancel := make(chan bool)
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go func() {
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reader := bufio.NewReader(os.Stdin)
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reader.ReadString('\n')
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cancel <- true
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}()
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for {
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select {
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case <-timer:
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temp, err := therm.AmbientTemp()
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if err == nil {
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fmt.Printf("Ambient temp is: %f\n", TempCToF(temp.CelsiusDeg))
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}
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status := alert.Read()
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fmt.Printf("Status: %d\n\n", status)
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if status == rpio.High {
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fmt.Println("Alert temp has been reached.")
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return
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}
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case <-cancel:
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return
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}
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}
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}
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func TempCToF(tempC float64) float64 {
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return tempC*9/5 + 32
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}
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func TempFToC(tempF float64) float64 {
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return (tempF - 32) * 5 / 9
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}
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