Merge pull request #143 from jamez70/bmp180_test

bmp180_read will do continuous reads on the bmp180 pressure sensor fo…
pull/182/head
cyoung 2015-12-13 17:39:33 -05:00
commit 9df3822096
1 zmienionych plików z 72 dodań i 0 usunięć

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@ -0,0 +1,72 @@
package main
import (
"fmt"
"github.com/kidoman/embd"
_ "github.com/kidoman/embd/host/all"
"github.com/kidoman/embd/sensor/bmp180"
)
var i2cbus embd.I2CBus
var myBMP180 *bmp180.BMP180
func readBMP180() (float64, float64, error) { // ºCelsius, Meters
temp, err := myBMP180.Temperature()
if err != nil {
return temp, 0.0, err
}
altitude, err := myBMP180.Altitude()
altitude = float64(1/0.3048) * altitude // Convert meters to feet.
if err != nil {
return temp, altitude, err
}
return temp, altitude, nil
}
func initBMP180() error {
myBMP180 = bmp180.New(i2cbus) //TODO: error checking.
return nil
}
func initI2C() error {
i2cbus = embd.NewI2CBus(1) //TODO: error checking.
return nil
}
// Unused at the moment. 5 second update, since read functions in bmp180 are slow.
func tempAndPressureReader() {
// Read temperature and pressure altitude.
temp, alt, err_bmp180 := readBMP180()
// Process.
if err_bmp180 != nil {
fmt.Printf("readBMP180(): %s\n", err_bmp180.Error())
} else {
fmt.Printf("Temp %f Alt %f\n",temp,alt)
}
}
func initAHRS() error {
if err := initI2C(); err != nil { // I2C bus.
return err
}
if err := initBMP180(); err != nil { // I2C temperature and pressure altitude.
i2cbus.Close()
return err
}
go tempAndPressureReader()
return nil
}
func main() {
fmt.Printf("Hello world!\n")
initAHRS()
for {
tempAndPressureReader()
}
}