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

apds9960/apds9960.go

@@ -57,6 +57,14 @@ type enableConfig struct {
 	PON  bool
 }
 
+// New creates a new APDS-9960 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: ADPS9960_ADDRESS, mode: MODE_NONE}
+}
+
 // Connected returns whether APDS-9960 has been found.
 // It does a "who am I" request and checks the response.
 func (d *Device) Connected() bool {
@@ -65,52 +73,6 @@ func (d *Device) Connected() bool {
 	return data[0] == 0xAB
 }
 
-// Configure sets up the APDS-9960 device.
-func (d *Device) Configure(cfg Configuration) {
-	d.DisableAll() // turn off everything
-
-	// "default" settings
-	if cfg.ProximityPulseLength == 0 {
-		cfg.ProximityPulseLength = 16
-	}
-	if cfg.ProximityPulseCount == 0 {
-		cfg.ProximityPulseCount = 64
-	}
-	if cfg.GesturePulseLength == 0 {
-		cfg.GesturePulseLength = 16
-	}
-	if cfg.GesturePulseCount == 0 {
-		cfg.GesturePulseCount = 64
-	}
-	if cfg.ProximityGain == 0 {
-		cfg.ProximityGain = 1
-	}
-	if cfg.GestureGain == 0 {
-		cfg.GestureGain = 1
-	}
-	if cfg.ColorGain == 0 {
-		cfg.ColorGain = 4
-	}
-	if cfg.ADCIntegrationCycles == 0 {
-		cfg.ADCIntegrationCycles = 4
-	}
-	if cfg.threshold == 0 {
-		d.gesture.threshold = 30
-	}
-	if cfg.sensitivity == 0 {
-		d.gesture.sensitivity = 20
-	}
-
-	d.SetProximityPulse(cfg.ProximityPulseLength, cfg.ProximityPulseCount)
-	d.SetGesturePulse(cfg.GesturePulseLength, cfg.GesturePulseCount)
-	d.SetGains(cfg.ProximityGain, cfg.GestureGain, cfg.ColorGain)
-	d.SetADCIntegrationCycles(cfg.ADCIntegrationCycles)
-
-	if cfg.LEDBoost > 0 {
-		d.LEDBoost(cfg.LEDBoost)
-	}
-}
-
 // GetMode returns current engine mode
 func (d *Device) GetMode() uint8 {
 	return d.mode
@@ -353,6 +315,51 @@ func (d *Device) ReadGesture() (gesture int32) {
 
 // private functions
 
+func (d *Device) configureDevice(cfg Configuration) {
+	d.DisableAll() // turn off everything
+
+	// "default" settings
+	if cfg.ProximityPulseLength == 0 {
+		cfg.ProximityPulseLength = 16
+	}
+	if cfg.ProximityPulseCount == 0 {
+		cfg.ProximityPulseCount = 64
+	}
+	if cfg.GesturePulseLength == 0 {
+		cfg.GesturePulseLength = 16
+	}
+	if cfg.GesturePulseCount == 0 {
+		cfg.GesturePulseCount = 64
+	}
+	if cfg.ProximityGain == 0 {
+		cfg.ProximityGain = 1
+	}
+	if cfg.GestureGain == 0 {
+		cfg.GestureGain = 1
+	}
+	if cfg.ColorGain == 0 {
+		cfg.ColorGain = 4
+	}
+	if cfg.ADCIntegrationCycles == 0 {
+		cfg.ADCIntegrationCycles = 4
+	}
+	if cfg.threshold == 0 {
+		d.gesture.threshold = 30
+	}
+	if cfg.sensitivity == 0 {
+		d.gesture.sensitivity = 20
+	}
+
+	d.SetProximityPulse(cfg.ProximityPulseLength, cfg.ProximityPulseCount)
+	d.SetGesturePulse(cfg.GesturePulseLength, cfg.GesturePulseCount)
+	d.SetGains(cfg.ProximityGain, cfg.GestureGain, cfg.ColorGain)
+	d.SetADCIntegrationCycles(cfg.ADCIntegrationCycles)
+
+	if cfg.LEDBoost > 0 {
+		d.LEDBoost(cfg.LEDBoost)
+	}
+}
+
 func (d *Device) enable(cfg enableConfig) {
 	var gen, pien, aien, wen, pen, aen, pon uint8
 

apds9960/apds9960_generic.go

@@ -5,10 +5,8 @@ package apds9960
 
 import "tinygo.org/x/drivers"
 
-// New creates a new APDS-9960 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: ADPS9960_ADDRESS, mode: MODE_NONE}
+// Configure sets up the APDS-9960 device.
+func (d *Device) Configure(cfg Configuration) {
+	// configure device
+	d.configureDevice(cfg)
 }

apds9960/apds9960_nano_33_ble.go

@@ -6,24 +6,19 @@ package apds9960
 import (
 	"machine"
 	"time"
-
-	"tinygo.org/x/drivers"
 )
 
-// New creates a new APDS-9960 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 APDS-9960 device.
+func (d *Device) Configure(cfg Configuration) {
 
-	return Device{bus: bus, Address: ADPS9960_ADDRESS, mode: MODE_NONE}
+	// Following lines are Nano 33 BLE specific, they have nothing to do with sensor per se
+	machine.LSM_PWR.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	machine.LSM_PWR.High()
+	machine.I2C_PULLUP.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	machine.I2C_PULLUP.High()
+	// Wait a moment
+	time.Sleep(10 * time.Millisecond)
+
+	// configure device
+	d.configureDevice(cfg)
 }