Add bmp388 support (#219)

bmp388: add support

examples/bmp388/main.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"machine"
+	"strconv"
+	"time"
+
+	"tinygo.org/x/drivers/bmp388"
+)
+
+func main() {
+
+	machine.I2C0.Configure(machine.I2CConfig{})
+
+	sensor := bmp388.New(machine.I2C0)
+	if !sensor.Connected() {
+		println("Uh oh, BMP388 not detected")
+		return
+	}
+
+	// The accuracy of the sensor can be increased, at the cost of a slower output rate. Table 9 in Section 3.5 of the
+	// datasheet has recommended settings for common use cases. If increasing the sampling rate, the output data rate
+	// (ODR) will likely have to be decreased. Configure() will return an error if there's a problem with the
+	// configuration settings - keep decreasing the ODR and cycling the power to the sensor until it is happy.
+	err := sensor.Configure(bmp388.Config{
+		Pressure:    bmp388.Sampling8X,
+		Temperature: bmp388.Sampling2X,
+		ODR:         bmp388.Odr25,
+		IIR:         bmp388.Coeff0,
+		Mode:        bmp388.Normal,
+	})
+
+	// This is also fine
+	// err := sensor.Configure(bmp388.BMP388Config{})
+
+	if err != nil {
+		println(err)
+	}
+
+	for {
+		temp, err := sensor.ReadTemperature() // returns the temperature in centicelsius
+		press, err := sensor.ReadPressure()   // returns the pressure in centipascals
+
+		if err != nil {
+			println(err)
+		} else {
+			println("Temperature: " + strconv.FormatInt(int64(temp), 10) + " cC")
+			println("Pressure:    " + strconv.FormatInt(int64(press), 10) + " cPa\n")
+		}
+
+		time.Sleep(time.Second)
+	}
+}