Fix Nano 33 BLE drivers (#351)

Fix HTS221, LPS22HB and APDS9960 drivers and their examples for Arduino Nano 33 BLE:

* Update hts221_nano_33_ble.go
* Update lps22hb_nano_33_ble.go
* Update apds9960_nano_33_ble.go

lps22hb/lps22hb.go

@@ -14,18 +14,12 @@ type Device struct {
 	Address uint8
 }
 
-// Connected returns whether LPS22HB has been found.
-// It does a "who am I" request and checks the response.
-func (d *Device) Connected() bool {
-	data := []byte{0}
-	d.bus.ReadRegister(d.Address, LPS22HB_WHO_AM_I_REG, data)
-	return data[0] == 0xB1
-}
-
-// Configure sets up the LPS22HB device for communication.
-func (d *Device) Configure() {
-	// set to block update mode
-	d.bus.WriteRegister(d.Address, LPS22HB_CTRL1_REG, []byte{0x02})
+// New creates a new LPS22HB connection. The I2C bus must already be
+// configured.
+//
+// This function only creates the Device object, it does not touch the device.
+func New(bus drivers.I2C) Device {
+	return Device{bus: bus, Address: LPS22HB_ADDRESS}
 }
 
 // ReadPressure returns the pressure in milli pascals (mPa).
@@ -42,6 +36,14 @@ func (d *Device) ReadPressure() (pressure int32, err error) {
 	return int32(pValue * 1000), nil
 }
 
+// Connected returns whether LPS22HB has been found.
+// It does a "who am I" request and checks the response.
+func (d *Device) Connected() bool {
+	data := []byte{0}
+	d.bus.ReadRegister(d.Address, LPS22HB_WHO_AM_I_REG, data)
+	return data[0] == 0xB1
+}
+
 // ReadTemperature returns the temperature in celsius milli degrees (°C/1000).
 func (d *Device) ReadTemperature() (temperature int32, err error) {
 	d.waitForOneShot()

lps22hb/lps22hb_generic.go

@@ -5,10 +5,8 @@ package lps22hb
 
 import "tinygo.org/x/drivers"
 
-// New creates a new LPS22HB connection. The I2C bus must already be
-// configured.
-//
-// This function only creates the Device object, it does not touch the device.
-func New(bus drivers.I2C) Device {
-	return Device{bus: bus, Address: LPS22HB_ADDRESS}
+// Configure sets up the LPS22HB device for communication.
+func (d *Device) Configure() {
+	// set to block update mode
+	d.bus.WriteRegister(d.Address, LPS22HB_CTRL1_REG, []byte{0x02})
 }

lps22hb/lps22hb_nano_33_ble.go

@@ -6,24 +6,18 @@ package lps22hb
 import (
 	"machine"
 	"time"
-
-	"tinygo.org/x/drivers"
 )
 
-// New creates a new LPS22HB connection. The I2C bus must already be
-// configured.
-//
-// This function only creates the Device object, it does not touch the device.
-func New(bus drivers.I2C) Device {
-	// turn on internal power pin (machine.P0_22) and I2C1 pullups power pin (machine.P1_00)
-	// and wait a moment.
-	ENV := machine.P0_22
-	ENV.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	ENV.High()
-	R := machine.P1_00
-	R.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	R.High()
-	time.Sleep(time.Millisecond * 10)
+// Configure sets up the LPS22HB device for communication.
+func (d *Device) Configure() {
+	// Following lines are Nano 33 BLE specific, they have nothing to do with sensor per se
+	machine.LSP_PWR.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	machine.LSP_PWR.High()
+	machine.I2C_PULLUP.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	machine.I2C_PULLUP.High()
+	// Wait a moment
+	time.Sleep(10 * time.Millisecond)
 
-	return Device{bus: bus, Address: LPS22HB_ADDRESS}
+	// set to block update mode
+	d.bus.WriteRegister(d.Address, LPS22HB_CTRL1_REG, []byte{0x02})
 }