feature: some additional changes to drivers.Pin HAL for clarity and readability.

Signed-off-by: deadprogram <ron@hybridgroup.com>

apa102/apa102.go

@@ -5,9 +5,9 @@ package apa102 // import "tinygo.org/x/drivers/apa102"
 
 import (
 	"image/color"
-	"machine"
 
 	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 )
 
 const (
@@ -37,8 +37,11 @@ func New(b drivers.SPI) *Device {
 
 // NewSoftwareSPI returns a new APA102 driver that will use a software based
 // implementation of the SPI protocol.
-func NewSoftwareSPI(sckPin, sdoPin machine.Pin, delay uint32) *Device {
-	return New(&bbSPI{SCK: sckPin, SDO: sdoPin, Delay: delay})
+func NewSoftwareSPI(sckPin, sdoPin drivers.PinOutput, delay uint32) *Device {
+	return New(&bbSPI{SCK: sckPin.Set, SDO: sdoPin.Set, Delay: delay, configurePins: func() {
+		legacy.ConfigurePinOut(sckPin)
+		legacy.ConfigurePinOut(sdoPin)
+	}})
 }
 
 // WriteColors writes the given RGBA color slice out using the APA102 protocol.

apa102/softspi.go

@@ -1,6 +1,9 @@
 package apa102
 
-import "machine"
+import (
+	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
+)
 
 // bbSPI is a dumb bit-bang implementation of SPI protocol that is hardcoded
 // to mode 0 and ignores trying to receive data. Just enough for the APA102.
@@ -8,15 +11,18 @@ import "machine"
 // most purposes other than the APA102 package. It might be desirable to make
 // this more generic and include it in the TinyGo "machine" package instead.
 type bbSPI struct {
-	SCK   machine.Pin
-	SDO   machine.Pin
-	Delay uint32
+	SCK           drivers.PinOutputFunc
+	SDO           drivers.PinOutputFunc
+	Delay         uint32
+	configurePins func()
 }
 
 // Configure sets up the SCK and SDO pins as outputs and sets them low
 func (s *bbSPI) Configure() {
-	s.SCK.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	s.SDO.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	if s.configurePins == nil {
+		panic(legacy.ErrConfigBeforeInstantiated)
+	}
+	s.configurePins()
 	s.SCK.Low()
 	s.SDO.Low()
 	if s.Delay == 0 {

bmi160/bmi160.go

@@ -1,31 +1,35 @@
 package bmi160
 
 import (
-	"machine"
 	"time"
 
 	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 )
 
 // DeviceSPI is the SPI interface to a BMI160 accelerometer/gyroscope. There is
 // also an I2C interface, but it is not yet supported.
 type DeviceSPI struct {
 	// Chip select pin
-	CSB machine.Pin
+	csb drivers.PinOutputFunc
 
 	buf [7]byte
 
 	// SPI bus (requires chip select to be usable).
-	Bus drivers.SPI
+	bus           drivers.SPI
+	configurePins func()
 }
 
 // NewSPI returns a new device driver. The pin and SPI interface are not
 // touched, provide a fully configured SPI object and call Configure to start
 // using this device.
-func NewSPI(csb machine.Pin, spi drivers.SPI) *DeviceSPI {
+func NewSPI(csb drivers.PinOutput, spi drivers.SPI) *DeviceSPI {
 	return &DeviceSPI{
-		CSB: csb, // chip select
-		Bus: spi,
+		csb: csb.Set, // chip select
+		bus: spi,
+		configurePins: func() {
+			legacy.ConfigurePinOut(csb)
+		},
 	}
 }
 
@@ -33,8 +37,11 @@ func NewSPI(csb machine.Pin, spi drivers.SPI) *DeviceSPI {
 // configures the BMI160, but it does not configure the SPI interface (it is
 // assumed to be up and running).
 func (d *DeviceSPI) Configure() error {
-	d.CSB.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.CSB.High()
+	if d.configurePins == nil {
+		return legacy.ErrConfigBeforeInstantiated
+	}
+	d.configurePins()
+	d.csb.High()
 
 	// The datasheet recommends doing a register read from address 0x7F to get
 	// SPI communication going:
@@ -86,9 +93,9 @@ func (d *DeviceSPI) ReadTemperature() (temperature int32, err error) {
 	data[0] = 0x80 | reg_TEMPERATURE_0
 	data[1] = 0
 	data[2] = 0
-	d.CSB.Low()
-	err = d.Bus.Tx(data, data)
-	d.CSB.High()
+	d.csb.Low()
+	err = d.bus.Tx(data, data)
+	d.csb.High()
 	if err != nil {
 		return
 	}
@@ -123,9 +130,9 @@ func (d *DeviceSPI) ReadAcceleration() (x int32, y int32, z int32, err error) {
 	for i := 1; i < len(data); i++ {
 		data[i] = 0
 	}
-	d.CSB.Low()
-	err = d.Bus.Tx(data, data)
-	d.CSB.High()
+	d.csb.Low()
+	err = d.bus.Tx(data, data)
+	d.csb.High()
 	if err != nil {
 		return
 	}
@@ -153,9 +160,9 @@ func (d *DeviceSPI) ReadRotation() (x int32, y int32, z int32, err error) {
 	for i := 1; i < len(data); i++ {
 		data[i] = 0
 	}
-	d.CSB.Low()
-	err = d.Bus.Tx(data, data)
-	d.CSB.High()
+	d.csb.Low()
+	err = d.bus.Tx(data, data)
+	d.csb.High()
 	if err != nil {
 		return
 	}
@@ -201,9 +208,9 @@ func (d *DeviceSPI) readRegister(address uint8) uint8 {
 	data := d.buf[:2]
 	data[0] = 0x80 | address
 	data[1] = 0
-	d.CSB.Low()
-	d.Bus.Tx(data, data)
-	d.CSB.High()
+	d.csb.Low()
+	d.bus.Tx(data, data)
+	d.csb.High()
 	return data[1]
 }
 
@@ -217,7 +224,7 @@ func (d *DeviceSPI) writeRegister(address, data uint8) {
 	buf[0] = address
 	buf[1] = data
 
-	d.CSB.Low()
-	d.Bus.Tx(buf, buf)
-	d.CSB.High()
+	d.csb.Low()
+	d.bus.Tx(buf, buf)
+	d.csb.High()
 }

buzzer/buzzer.go

@@ -2,22 +2,22 @@
 package buzzer // import "tinygo.org/x/drivers/buzzer"
 
 import (
-	"machine"
-
 	"time"
+
+	"tinygo.org/x/drivers"
 )
 
 // Device wraps a GPIO connection to a buzzer.
 type Device struct {
-	pin  machine.Pin
+	pin  drivers.PinOutputFunc
 	High bool
 	BPM  float64
 }
 
 // New returns a new buzzer driver given which pin to use
-func New(pin machine.Pin) Device {
+func New(pin drivers.PinOutput) Device {
 	return Device{
-		pin:  pin,
+		pin:  pin.Set,
 		High: false,
 		BPM:  96.0,
 	}
@@ -25,14 +25,14 @@ func New(pin machine.Pin) Device {
 
 // On sets the buzzer to a high state.
 func (l *Device) On() (err error) {
-	l.pin.Set(true)
+	l.pin.High()
 	l.High = true
 	return
 }
 
 // Off sets the buzzer to a low state.
 func (l *Device) Off() (err error) {
-	l.pin.Set(false)
+	l.pin.Low()
 	l.High = false
 	return
 }

easystepper/easystepper.go

@@ -2,9 +2,9 @@
 package easystepper // import "tinygo.org/x/drivers/easystepper"
 
 import (
-	"errors"
-	"machine"
 	"time"
+
+	"tinygo.org/x/drivers"
 )
 
 // StepMode determines the coil sequence used to perform a single step
@@ -30,28 +30,10 @@ func (sm StepMode) stepCount() uint {
 	}
 }
 
-// DeviceConfig contains the configuration data for a single easystepper driver
-type DeviceConfig struct {
-	// Pin1 ... Pin4 determines the pins to configure and use for the device
-	Pin1, Pin2, Pin3, Pin4 machine.Pin
-	// StepCount is the number of steps required to perform a full revolution of the stepper motor
-	StepCount uint
-	// RPM determines the speed of the stepper motor in 'Revolutions per Minute'
-	RPM uint
-	// Mode determines the coil sequence used to perform a single step
-	Mode StepMode
-}
-
-// DualDeviceConfig contains the configuration data for a dual easystepper driver
-type DualDeviceConfig struct {
-	DeviceConfig
-	// Pin5 ... Pin8 determines the pins to configure and use for the second device
-	Pin5, Pin6, Pin7, Pin8 machine.Pin
-}
-
 // Device holds the pins and the delay between steps
 type Device struct {
-	pins       [4]machine.Pin
+	pins       [4]drivers.PinOutputFunc
+	config     func()
 	stepDelay  time.Duration
 	stepNumber uint8
 	stepMode   StepMode
@@ -62,51 +44,6 @@ type DualDevice struct {
 	devices [2]*Device
 }
 
-// New returns a new single easystepper driver given a DeviceConfig
-func New(config DeviceConfig) (*Device, error) {
-	if config.StepCount == 0 || config.RPM == 0 {
-		return nil, errors.New("config.StepCount and config.RPM must be > 0")
-	}
-	return &Device{
-		pins:      [4]machine.Pin{config.Pin1, config.Pin2, config.Pin3, config.Pin4},
-		stepDelay: time.Second * 60 / time.Duration((config.StepCount * config.RPM)),
-		stepMode:  config.Mode,
-	}, nil
-}
-
-// Configure configures the pins of the Device
-func (d *Device) Configure() {
-	for _, pin := range d.pins {
-		pin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	}
-}
-
-// NewDual returns a new dual easystepper driver given 8 pins, number of steps and rpm
-func NewDual(config DualDeviceConfig) (*DualDevice, error) {
-	// Create the first device
-	dev1, err := New(config.DeviceConfig)
-	if err != nil {
-		return nil, err
-	}
-	// Create the second device
-	config.DeviceConfig.Pin1 = config.Pin5
-	config.DeviceConfig.Pin2 = config.Pin6
-	config.DeviceConfig.Pin3 = config.Pin7
-	config.DeviceConfig.Pin4 = config.Pin8
-	dev2, err := New(config.DeviceConfig)
-	if err != nil {
-		return nil, err
-	}
-	// Return composite dual device
-	return &DualDevice{devices: [2]*Device{dev1, dev2}}, nil
-}
-
-// Configure configures the pins of the DualDevice
-func (d *DualDevice) Configure() {
-	d.devices[0].Configure()
-	d.devices[1].Configure()
-}
-
 // Move rotates the motor the number of given steps
 // (negative steps will rotate it the opposite direction)
 func (d *Device) Move(steps int32) {

easystepper/easystepper_go.go

@@ -0,0 +1,26 @@
+package easystepper
+
+import (
+	"errors"
+	"time"
+
+	"tinygo.org/x/drivers"
+)
+
+func NewCrossPlatform(stepcount, rpm uint, mode StepMode, pins [4]drivers.PinOutputFunc) (*Device, error) {
+	if stepcount == 0 || rpm == 0 {
+		return nil, errors.New("zero rpm and/or stepcount")
+	}
+	for i := range pins {
+		if pins[i] == nil {
+			return nil, errors.New("nil pin")
+		}
+	}
+	d := &Device{
+		pins:      pins,
+		stepDelay: time.Second * 60 / time.Duration((stepcount * rpm)),
+		stepMode:  mode,
+		config:    func() {},
+	}
+	return d, nil
+}

easystepper/easystepper_tinygo.go

@@ -0,0 +1,83 @@
+//go:build baremetal
+
+package easystepper
+
+import (
+	"errors"
+	"machine"
+	"time"
+
+	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
+)
+
+// New returns a new single easystepper driver given a DeviceConfig
+func New(config DeviceConfig) (*Device, error) {
+	if config.StepCount == 0 || config.RPM == 0 {
+		return nil, errors.New("config.StepCount and config.RPM must be > 0")
+	}
+	return &Device{
+		pins:      [4]drivers.PinOutputFunc{config.Pin1.Set, config.Pin2.Set, config.Pin3.Set, config.Pin4.Set},
+		stepDelay: time.Second * 60 / time.Duration((config.StepCount * config.RPM)),
+		stepMode:  config.Mode,
+		config: func() {
+			legacy.ConfigurePinOut(config.Pin1)
+			legacy.ConfigurePinOut(config.Pin2)
+			legacy.ConfigurePinOut(config.Pin3)
+			legacy.ConfigurePinOut(config.Pin4)
+		},
+	}, nil
+}
+
+// Configure configures the pins of the Device
+func (d *Device) Configure() {
+	if d.config == nil {
+		panic(legacy.ErrConfigBeforeInstantiated)
+	}
+	d.config()
+}
+
+// Configure configures the pins of the DualDevice
+func (d *DualDevice) Configure() {
+	d.devices[0].Configure()
+	d.devices[1].Configure()
+}
+
+// NewDual returns a new dual easystepper driver given 8 pins, number of steps and rpm
+func NewDual(config DualDeviceConfig) (*DualDevice, error) {
+	// Create the first device
+	dev1, err := New(config.DeviceConfig)
+	if err != nil {
+		return nil, err
+	}
+	// Create the second device
+	config.DeviceConfig.Pin1 = config.Pin5
+	config.DeviceConfig.Pin2 = config.Pin6
+	config.DeviceConfig.Pin3 = config.Pin7
+	config.DeviceConfig.Pin4 = config.Pin8
+	dev2, err := New(config.DeviceConfig)
+	if err != nil {
+		return nil, err
+	}
+	// Return composite dual device
+	return &DualDevice{devices: [2]*Device{dev1, dev2}}, nil
+}
+
+// DeviceConfig contains the configuration data for a single easystepper driver
+type DeviceConfig struct {
+	// Pin1 ... Pin4 determines the pins to configure and use for the device
+	Pin1, Pin2, Pin3, Pin4 machine.Pin
+	// StepCount is the number of steps required to perform a full revolution of the stepper motor
+	StepCount uint
+	// RPM determines the speed of the stepper motor in 'Revolutions per Minute'
+	RPM uint
+	// Mode determines the coil sequence used to perform a single step
+	Mode StepMode
+}
+
+// DualDeviceConfig contains the configuration data for a dual easystepper driver
+type DualDeviceConfig struct {
+	DeviceConfig
+	// Pin5 ... Pin8 determines the pins to configure and use for the second device
+	Pin5, Pin6, Pin7, Pin8 machine.Pin
+}

ft6336/ft6336.go

@@ -5,8 +5,6 @@
 package ft6336
 
 import (
-	"machine"
-
 	"tinygo.org/x/drivers"
 	"tinygo.org/x/drivers/internal/legacy"
 	"tinygo.org/x/drivers/touch"
@@ -14,19 +12,21 @@ import (
 
 // Device wraps FT6336 I2C Self-Capacitive touch
 type Device struct {
-	bus     drivers.I2C
-	buf     []byte
-	Address uint8
-	intPin  machine.Pin
+	bus           drivers.I2C
+	buf           []byte
+	Address       uint8
+	configurePins func()
 }
 
 // New returns FT6336 device for the provided I2C bus using default address.
-func New(i2c drivers.I2C, intPin machine.Pin) *Device {
+func New(i2c drivers.I2C, intPin drivers.PinInput) *Device {
 	return &Device{
 		bus:     i2c,
 		buf:     make([]byte, 11),
 		Address: Address,
-		intPin:  intPin,
+		configurePins: func() {
+			legacy.ConfigurePinInputPulldown(intPin)
+		},
 	}
 }
 
@@ -36,8 +36,11 @@ type Config struct {
 
 // Configure the FT6336 device.
 func (d *Device) Configure(config Config) error {
+	if d.configurePins == nil {
+		return legacy.ErrConfigBeforeInstantiated
+	}
 	d.write1Byte(0xA4, 0x00)
-	d.intPin.Configure(machine.PinConfig{Mode: machine.PinInputPulldown})
+	d.configurePins()
 	return nil
 }
 

gc9a01/gc9a01.go

@@ -5,12 +5,12 @@ package gc9a01 // import "tinygo.org/x/drivers/gc9a01"
 
 import (
 	"image/color"
-	"machine"
 	"time"
 
 	"errors"
 
 	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 )
 
 // Rotation controls the rotation used by the display.
@@ -22,10 +22,10 @@ type FrameRate uint8
 // Device wraps an SPI connection.
 type Device struct {
 	bus             drivers.SPI
-	dcPin           machine.Pin
-	resetPin        machine.Pin
-	csPin           machine.Pin
-	blPin           machine.Pin
+	dcPin           drivers.PinOutputFunc
+	resetPin        drivers.PinOutputFunc
+	csPin           drivers.PinOutputFunc
+	blPin           drivers.PinOutputFunc
 	width           int16
 	height          int16
 	columnOffsetCfg int16
@@ -52,17 +52,17 @@ type Config struct {
 }
 
 // New creates a new ST7789 connection. The SPI wire must already be configured.
-func New(bus drivers.SPI, resetPin, dcPin, csPin, blPin machine.Pin) Device {
-	resetPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	dcPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	csPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	blPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
+func New(bus drivers.SPI, resetPin, dcPin, csPin, blPin drivers.PinOutput) Device {
+	legacy.ConfigurePinOut(resetPin)
+	legacy.ConfigurePinOut(dcPin)
+	legacy.ConfigurePinOut(csPin)
+	legacy.ConfigurePinOut(blPin)
 	return Device{
 		bus:      bus,
-		resetPin: resetPin,
-		dcPin:    dcPin,
-		csPin:    csPin,
-		blPin:    blPin,
+		resetPin: resetPin.Set,
+		dcPin:    dcPin.Set,
+		csPin:    csPin.Set,
+		blPin:    blPin.Set,
 	}
 }
 
@@ -226,7 +226,7 @@ func (d *Device) Data(data uint8) {
 
 // Tx sends data to the display
 func (d *Device) Tx(data []byte, isCommand bool) {
-	d.dcPin.Set(!isCommand)
+	d.dcPin(!isCommand)
 	d.bus.Tx(data, nil)
 }
 

hcsr04/hcsr04.go

@@ -5,30 +5,39 @@
 package hcsr04
 
 import (
-	"machine"
 	"time"
+
+	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 )
 
 const TIMEOUT = 23324 // max sensing distance (4m)
 
 // Device holds the pins
 type Device struct {
-	trigger machine.Pin
-	echo    machine.Pin
+	trigger       drivers.PinOutputFunc
+	echo          drivers.PinInputFunc
+	configurePins func()
 }
 
 // New returns a new ultrasonic driver given 2 pins
-func New(trigger, echo machine.Pin) Device {
+func New(trigger drivers.PinOutput, echo drivers.PinInput) Device {
 	return Device{
-		trigger: trigger,
-		echo:    echo,
+		trigger: trigger.Set,
+		echo:    echo.Get,
+		configurePins: func() {
+			legacy.ConfigurePinOut(trigger)
+			legacy.ConfigurePinInput(echo)
+		},
 	}
 }
 
 // Configure configures the pins of the Device
 func (d *Device) Configure() {
-	d.trigger.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.echo.Configure(machine.PinConfig{Mode: machine.PinInput})
+	if d.configurePins == nil {
+		panic(legacy.ErrConfigBeforeInstantiated)
+	}
+	d.configurePins()
 }
 
 // ReadDistance returns the distance of the object in mm
@@ -52,7 +61,7 @@ func (d *Device) ReadPulse() int32 {
 	d.trigger.Low()
 	i := uint8(0)
 	for {
-		if d.echo.Get() {
+		if d.echo() {
 			t = time.Now()
 			break
 		}
@@ -66,7 +75,7 @@ func (d *Device) ReadPulse() int32 {
 	}
 	i = 0
 	for {
-		if !d.echo.Get() {
+		if !d.echo() {
 			return int32(time.Since(t).Microseconds())
 		}
 		i++

hd44780/hd44780.go

@@ -210,7 +210,7 @@ func (d *Device) SendCommand(command byte) {
 	d.bus.SetCommandMode(true)
 	d.bus.Write([]byte{command})
 
-	for d.busy(command == DISPLAY_CLEAR || command == CURSOR_HOME) {
+	for d.isBusy(command == DISPLAY_CLEAR || command == CURSOR_HOME) {
 	}
 }
 
@@ -219,7 +219,7 @@ func (d *Device) sendData(data byte) {
 	d.bus.SetCommandMode(false)
 	d.bus.Write([]byte{data})
 
-	for d.busy(false) {
+	for d.isBusy(false) {
 	}
 }
 
@@ -231,9 +231,9 @@ func (d *Device) CreateCharacter(cgramAddr uint8, data []byte) {
 	}
 }
 
-// busy returns true when hd447890 is busy
+// isBusy returns true when hd447890 is isBusy
 // or after the timeout specified
-func (d *Device) busy(longDelay bool) bool {
+func (d *Device) isBusy(longDelay bool) bool {
 	if d.bus.WriteOnly() {
 		// Can't read busy flag if write only, so sleep a bit then return
 		if longDelay {
@@ -261,7 +261,7 @@ func (d *Device) busy(longDelay bool) bool {
 
 // Busy returns true when hd447890 is busy
 func (d *Device) Busy() bool {
-	return d.busy(false)
+	return d.isBusy(false)
 }
 
 // Size returns the current size of the display.

internal/legacy/pinhal.go

@@ -0,0 +1,54 @@
+package legacy
+
+import (
+	"errors"
+
+	"tinygo.org/x/drivers"
+)
+
+// ConfigurePinOut is a legacy function used to configure pins as outputs.
+//
+// Deprecated: Do not configure pins in drivers.
+// This is a legacy feature and should only be used by drivers that
+// previously configured pins in initialization to avoid breaking users.
+func ConfigurePinOut(po drivers.PinOutput) {
+	configurePinOut(po)
+}
+
+// ConfigurePinInput is a legacy function used to configure pins as inputs.
+//
+// Deprecated: Do not configure pins in drivers.
+// This is a legacy feature and should only be used by drivers that
+// previously configured pins in initialization to avoid breaking users.
+func ConfigurePinInputPulldown(pi drivers.PinInput) {
+	configurePinInputPulldown(pi)
+}
+
+// ConfigurePinInput is a legacy function used to configure pins as inputs.
+//
+// Deprecated: Do not configure pins in drivers.
+// This is a legacy feature and should only be used by drivers that
+// previously configured pins in initialization to avoid breaking users.
+func ConfigurePinInput(pi drivers.PinInput) {
+	configurePinInput(pi)
+}
+
+// ConfigurePinInput is a legacy function used to configure pins as inputs.
+//
+// Deprecated: Do not configure pins in drivers.
+// This is a legacy feature and should only be used by drivers that
+// previously configured pins in initialization to avoid breaking users.
+func ConfigurePinInputPullup(pi drivers.PinInput) {
+	configurePinInputPullup(pi)
+}
+
+// PinIsNoPin returns true if the argument is a machine.Pin type and is the machine.NoPin predeclared type.
+//
+// Deprecated: Drivers do not require pin knowledge from now on.
+func PinIsNoPin(pin any) bool {
+	return pinIsNoPin(pin)
+}
+
+var (
+	ErrConfigBeforeInstantiated = errors.New("device must be instantiated with New before calling Configure method")
+)

internal/legacy/pinhal_go.go

@@ -0,0 +1,13 @@
+//go:build !baremetal
+
+package legacy
+
+import (
+	"tinygo.org/x/drivers"
+)
+
+func configurePinOut(p drivers.PinOutput)          {}
+func configurePinInput(p drivers.PinInput)         {}
+func configurePinInputPulldown(p drivers.PinInput) {}
+func configurePinInputPullup(p drivers.PinInput)   {}
+func pinIsNoPin(a any) bool                        { return false }

internal/legacy/pinhal_nopulls.go

@@ -0,0 +1,10 @@
+//go:build baremetal && fe310
+
+package legacy
+
+import "machine"
+
+const (
+	pulldown = machine.PinInput
+	pullup   = machine.PinInput
+)

internal/legacy/pinhal_pulls.go

@@ -0,0 +1,13 @@
+//go:build baremetal && !fe310
+
+package legacy
+
+import "machine"
+
+// If you are getting a build error here you then we missed adding
+// your CPU build tag to the list of CPUs that do not have pulldown/pullups.
+// Add it above and in pinhal_nopulls! You should also add a smoketest for it :)
+const (
+	pulldown = machine.PinInputPulldown
+	pullup   = machine.PinInputPullup
+)

internal/legacy/pinhal_tinygo.go

@@ -0,0 +1,37 @@
+//go:build baremetal
+
+package legacy
+
+import (
+	"machine"
+
+	"tinygo.org/x/drivers"
+)
+
+func configurePinOut(po drivers.PinOutput) {
+	configurePin(po, machine.PinOutput)
+}
+
+func configurePinInputPulldown(pi drivers.PinInput) {
+	configurePin(pi, pulldown) // some chips do not have pull down, in which case pulldown==machine.PinInput.
+}
+
+func configurePinInput(pi drivers.PinInput) {
+	configurePin(pi, machine.PinInput)
+}
+
+func configurePinInputPullup(pi drivers.PinInput) {
+	configurePin(pi, pullup) // some chips do not have pull up, in which case pullup==machine.PinInput.
+}
+
+func pinIsNoPin(a any) bool {
+	p, ok := a.(machine.Pin)
+	return ok && p == machine.NoPin
+}
+
+func configurePin(p any, mode machine.PinMode) {
+	machinePin, ok := p.(machine.Pin)
+	if ok {
+		machinePin.Configure(machine.PinConfig{Mode: mode})
+	}
+}

max6675/max6675.go

@@ -3,7 +3,6 @@ package max6675
 
 import (
 	"errors"
-	"machine"
 
 	"tinygo.org/x/drivers"
 )
@@ -14,16 +13,16 @@ var ErrThermocoupleOpen = errors.New("thermocouple input open")
 
 type Device struct {
 	bus drivers.SPI
-	cs  machine.Pin
+	cs  drivers.PinOutputFunc
 }
 
 // Create a new Device to read from a MAX6675 thermocouple.
 // Pins must be configured before use.  Frequency for SPI
 // should be 4.3MHz maximum.
-func NewDevice(bus drivers.SPI, cs machine.Pin) *Device {
+func NewDevice(bus drivers.SPI, cs drivers.PinOutput) *Device {
 	return &Device{
 		bus: bus,
-		cs:  cs,
+		cs:  cs.Set,
 	}
 }
 

max72xx/max72xx.go

@@ -3,31 +3,35 @@
 package max72xx
 
 import (
-	"machine"
-
 	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 )
 
 type Device struct {
-	bus drivers.SPI
-	cs  machine.Pin
+	bus           drivers.SPI
+	cs            drivers.PinOutputFunc
+	configurePins func()
 }
 
 // NewDriver creates a new max7219 connection. The SPI wire must already be configured
 // The SPI frequency must not be higher than 10MHz.
 // parameter cs: the datasheet also refers to this pin as "load" pin.
-func NewDevice(bus drivers.SPI, cs machine.Pin) *Device {
+func NewDevice(bus drivers.SPI, cs drivers.PinOutput) *Device {
 	return &Device{
 		bus: bus,
-		cs:  cs,
+		cs:  cs.Set,
+		configurePins: func() {
+			legacy.ConfigurePinOut(cs)
+		},
 	}
 }
 
 // Configure setups the pins.
 func (driver *Device) Configure() {
-	outPutConfig := machine.PinConfig{Mode: machine.PinOutput}
-
-	driver.cs.Configure(outPutConfig)
+	if driver.configurePins == nil {
+		panic(legacy.ErrConfigBeforeInstantiated)
+	}
+	driver.configurePins()
 }
 
 // SetScanLimit sets the scan limit. Maximum is 8.

mcp2515/mcp2515.go

@@ -8,18 +8,19 @@ package mcp2515 // import "tinygo.org/x/drivers/mcp2515"
 import (
 	"errors"
 	"fmt"
-	"machine"
 	"time"
 
 	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 )
 
 // Device wraps MCP2515 SPI CAN Module.
 type Device struct {
-	spi     SPI
-	cs      machine.Pin
-	msg     *CANMsg
-	mcpMode byte
+	spi           SPI
+	cs            drivers.PinOutputFunc
+	msg           *CANMsg
+	mcpMode       byte
+	configurePins func()
 }
 
 // CANMsg stores CAN message fields.
@@ -36,15 +37,18 @@ const (
 )
 
 // New returns a new MCP2515 driver. Pass in a fully configured SPI bus.
-func New(b drivers.SPI, csPin machine.Pin) *Device {
+func New(b drivers.SPI, csPin drivers.PinOutput) *Device {
 	d := &Device{
 		spi: SPI{
 			bus: b,
 			tx:  make([]byte, 0, bufferSize),
 			rx:  make([]byte, 0, bufferSize),
 		},
-		cs:  csPin,
+		cs:  csPin.Set,
 		msg: &CANMsg{},
+		configurePins: func() {
+			legacy.ConfigurePinOut(csPin)
+		},
 	}
 
 	return d
@@ -52,7 +56,10 @@ func New(b drivers.SPI, csPin machine.Pin) *Device {
 
 // Configure sets up the device for communication.
 func (d *Device) Configure() {
-	d.cs.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	if d.configurePins == nil {
+		panic(legacy.ErrConfigBeforeInstantiated)
+	}
+	d.configurePins()
 }
 
 const beginTimeoutValue int = 10

pcd8544/pcd8544.go

@@ -6,7 +6,6 @@ package pcd8544 // import "tinygo.org/x/drivers/pcd8544"
 import (
 	"errors"
 	"image/color"
-	"machine"
 	"time"
 
 	"tinygo.org/x/drivers"
@@ -15,9 +14,9 @@ import (
 // Device wraps an SPI connection.
 type Device struct {
 	bus        drivers.SPI
-	dcPin      machine.Pin
-	rstPin     machine.Pin
-	scePin     machine.Pin
+	dcPin      drivers.PinOutputFunc
+	rstPin     drivers.PinOutputFunc
+	scePin     drivers.PinOutputFunc
 	buffer     []byte
 	width      int16
 	height     int16
@@ -30,12 +29,12 @@ type Config struct {
 }
 
 // New creates a new PCD8544 connection. The SPI bus must already be configured.
-func New(bus drivers.SPI, dcPin, rstPin, scePin machine.Pin) *Device {
+func New(bus drivers.SPI, dcPin, rstPin, scePin drivers.PinOutput) *Device {
 	return &Device{
 		bus:    bus,
-		dcPin:  dcPin,
-		rstPin: rstPin,
-		scePin: scePin,
+		dcPin:  dcPin.Set,
+		rstPin: rstPin.Set,
+		scePin: scePin.Set,
 	}
 }
 

pin.go

@@ -0,0 +1,39 @@
+package drivers
+
+// PinOutput represents a pin hardware abstraction layer for a pin that can output a digital signal.
+type PinOutput interface {
+	Set(level bool)
+}
+
+// PinInput represents a pin hardware abstraction layer.
+type PinInput interface {
+	Get() (level bool)
+}
+
+// PinOutputFunc is hardware abstraction for a function that causes pin to output a
+// digital signal (high or low level).
+//
+//	// Code conversion demo: from machine.Pin to drivers.PinOutputFunc
+//	led := machine.LED
+//	led.Configure(machine.PinConfig{Mode: machine.PinOutput})
+//	var pin drivers.PinOutputFunc = led.Set // Going from a machine.Pin to a drivers.PinOutputFunc
+type PinOutputFunc func(level bool)
+
+// High sets the underlying pin's level to high. This is equivalent to calling PinOutput(true).
+func (po PinOutputFunc) High() {
+	po(true)
+}
+
+// Low sets the underlying pin's level to low. This is equivalent to calling PinOutput(false).
+func (po PinOutputFunc) Low() {
+	po(false)
+}
+
+// PinInputFunc is hardware abstraction for a pin which receives a
+// digital signal and reads it (high or low level).
+//
+//	// Code conversion demo: from machine.Pin to drivers.PinInputFunc
+//	input := machine.LED
+//	input.Configure(machine.PinConfig{Mode: machine.PinInputPulldown}) // or use machine.PinInputPullup or machine.PinInput
+//	var pin drivers.PinInputFunc = input.Get // Going from a machine.Pin to a drivers.PinInputFunc
+type PinInputFunc func() (level bool)

shiftregister/shiftregister.go

@@ -2,7 +2,8 @@
 package shiftregister
 
 import (
-	"machine"
+	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 )
 
 type NumberBit int8
@@ -16,9 +17,10 @@ const (
 
 // Device holds pin number
 type Device struct {
-	latch, clock, out machine.Pin // IC wiring
-	bits              NumberBit   // Pin number
-	mask              uint32      // keep all pins state
+	latch, clock, out drivers.PinOutputFunc // IC wiring
+	config            func()
+	bits              NumberBit // Pin number
+	mask              uint32    // keep all pins state
 }
 
 // ShiftPin is the implementation of the ShiftPin interface.
@@ -29,20 +31,25 @@ type ShiftPin struct {
 }
 
 // New returns a new shift output register device
-func New(Bits NumberBit, Latch, Clock, Out machine.Pin) *Device {
+func New(Bits NumberBit, Latch, Clock, Out drivers.PinOutput) *Device {
 	return &Device{
-		latch: Latch,
-		clock: Clock,
-		out:   Out,
+		latch: Latch.Set,
+		clock: Clock.Set,
+		out:   Out.Set,
 		bits:  Bits,
+		config: func() {
+			legacy.ConfigurePinOut(Latch)
+			legacy.ConfigurePinOut(Clock)
+			legacy.ConfigurePinOut(Out)
+		},
 	}
 }
 
 // Configure set hardware configuration
 func (d *Device) Configure() {
-	d.latch.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.clock.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.out.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	if d.config == nil {
+		panic(legacy.ErrConfigBeforeInstantiated)
+	}
 	d.latch.High()
 }
 
@@ -53,7 +60,7 @@ func (d *Device) WriteMask(mask uint32) {
 	d.latch.Low()
 	for i := 0; i < int(d.bits); i++ {
 		d.clock.Low()
-		d.out.Set(mask&1 != 0)
+		d.out(mask&1 != 0)
 		mask = mask >> 1
 		d.clock.High()
 	}

ssd1289/pinbus.go

@@ -1,3 +1,5 @@
+//go:build baremetal
+
 package ssd1289
 
 import "machine"

ssd1289/ssd1289.go

@@ -7,6 +7,9 @@ import (
 	"image/color"
 	"machine"
 	"time"
+
+	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 )
 
 type Bus interface {
@@ -14,10 +17,10 @@ type Bus interface {
 }
 
 type Device struct {
-	rs  machine.Pin
-	wr  machine.Pin
-	cs  machine.Pin
-	rst machine.Pin
+	rs  drivers.PinOutputFunc
+	wr  drivers.PinOutputFunc
+	cs  drivers.PinOutputFunc
+	rst drivers.PinOutputFunc
 	bus Bus
 }
 
@@ -26,21 +29,20 @@ const height = int16(320)
 
 func New(rs machine.Pin, wr machine.Pin, cs machine.Pin, rst machine.Pin, bus Bus) Device {
 	d := Device{
-		rs:  rs,
-		wr:  wr,
-		cs:  cs,
-		rst: rst,
+		rs:  rs.Set,
+		wr:  wr.Set,
+		cs:  cs.Set,
+		rst: rst.Set,
 		bus: bus,
 	}
+	legacy.ConfigurePinOut(rs)
+	legacy.ConfigurePinOut(wr)
+	legacy.ConfigurePinOut(cs)
+	legacy.ConfigurePinOut(rst)
 
-	rs.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	wr.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	cs.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	rst.Configure(machine.PinConfig{Mode: machine.PinOutput})
-
-	cs.High()
-	rst.High()
-	wr.High()
+	cs.Set(true)
+	rst.Set(true)
+	wr.Set(true)
 
 	return d
 }

ssd1331/ssd1331.go

@@ -11,6 +11,7 @@ import (
 	"time"
 
 	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 )
 
 type Model uint8
@@ -19,9 +20,9 @@ type Rotation uint8
 // Device wraps an SPI connection.
 type Device struct {
 	bus         drivers.SPI
-	dcPin       machine.Pin
-	resetPin    machine.Pin
-	csPin       machine.Pin
+	dcPin       drivers.PinOutputFunc
+	resetPin    drivers.PinOutputFunc
+	csPin       drivers.PinOutputFunc
 	width       int16
 	height      int16
 	batchLength int16
@@ -37,14 +38,14 @@ type Config struct {
 
 // New creates a new SSD1331 connection. The SPI wire must already be configured.
 func New(bus drivers.SPI, resetPin, dcPin, csPin machine.Pin) Device {
-	dcPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	resetPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	csPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	legacy.ConfigurePinOut(dcPin)
+	legacy.ConfigurePinOut(resetPin)
+	legacy.ConfigurePinOut(csPin)
 	return Device{
 		bus:      bus,
-		dcPin:    dcPin,
-		resetPin: resetPin,
-		csPin:    csPin,
+		dcPin:    dcPin.Set,
+		resetPin: resetPin.Set,
+		csPin:    csPin.Set,
 	}
 }
 
@@ -251,7 +252,7 @@ func (d *Device) Data(data uint8) {
 
 // Tx sends data to the display
 func (d *Device) Tx(data []byte, isCommand bool) {
-	d.dcPin.Set(!isCommand)
+	d.dcPin(!isCommand)
 	d.bus.Tx(data, nil)
 }
 

ssd1351/ssd1351.go

@@ -6,10 +6,10 @@ package ssd1351 // import "tinygo.org/x/drivers/ssd1351"
 import (
 	"errors"
 	"image/color"
-	"machine"
 	"time"
 
 	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 )
 
 var (
@@ -19,17 +19,18 @@ var (
 
 // Device wraps an SPI connection.
 type Device struct {
-	bus          drivers.SPI
-	dcPin        machine.Pin
-	resetPin     machine.Pin
-	csPin        machine.Pin
-	enPin        machine.Pin
-	rwPin        machine.Pin
-	width        int16
-	height       int16
-	rowOffset    int16
-	columnOffset int16
-	bufferLength int16
+	bus           drivers.SPI
+	dcPin         drivers.PinOutputFunc
+	resetPin      drivers.PinOutputFunc
+	csPin         drivers.PinOutputFunc
+	enPin         drivers.PinOutputFunc
+	rwPin         drivers.PinOutputFunc
+	configurePins func()
+	width         int16
+	height        int16
+	rowOffset     int16
+	columnOffset  int16
+	bufferLength  int16
 }
 
 // Config is the configuration for the display
@@ -41,19 +42,29 @@ type Config struct {
 }
 
 // New creates a new SSD1351 connection. The SPI wire must already be configured.
-func New(bus drivers.SPI, resetPin, dcPin, csPin, enPin, rwPin machine.Pin) Device {
+func New(bus drivers.SPI, resetPin, dcPin, csPin, enPin, rwPin drivers.PinOutput) Device {
 	return Device{
 		bus:      bus,
-		dcPin:    dcPin,
-		resetPin: resetPin,
-		csPin:    csPin,
-		enPin:    enPin,
-		rwPin:    rwPin,
+		dcPin:    dcPin.Set,
+		resetPin: resetPin.Set,
+		csPin:    csPin.Set,
+		enPin:    enPin.Set,
+		rwPin:    rwPin.Set,
+		configurePins: func() {
+			legacy.ConfigurePinOut(dcPin)
+			legacy.ConfigurePinOut(resetPin)
+			legacy.ConfigurePinOut(csPin)
+			legacy.ConfigurePinOut(enPin)
+			legacy.ConfigurePinOut(rwPin)
+		},
 	}
 }
 
 // Configure initializes the display with default configuration
 func (d *Device) Configure(cfg Config) {
+	if d.configurePins == nil {
+		panic(legacy.ErrConfigBeforeInstantiated)
+	}
 	if cfg.Width == 0 {
 		cfg.Width = 128
 	}
@@ -73,11 +84,7 @@ func (d *Device) Configure(cfg Config) {
 	}
 
 	// configure GPIO pins
-	d.dcPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.resetPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.csPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.enPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.rwPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	d.configurePins()
 
 	// reset the device
 	d.resetPin.High()
@@ -278,7 +285,7 @@ func (d *Device) Data(data uint8) {
 
 // Tx sends data to the display
 func (d *Device) Tx(data []byte, isCommand bool) {
-	d.dcPin.Set(!isCommand)
+	d.dcPin(!isCommand)
 	d.csPin.Low()
 	d.bus.Tx(data, nil)
 	d.csPin.High()

st7735/st7735.go

@@ -5,12 +5,12 @@ package st7735 // import "tinygo.org/x/drivers/st7735"
 
 import (
 	"image/color"
-	"machine"
 	"time"
 
 	"errors"
 
 	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 	"tinygo.org/x/drivers/pixel"
 )
 
@@ -39,10 +39,10 @@ type Device = DeviceOf[pixel.RGB565BE]
 // formats.
 type DeviceOf[T Color] struct {
 	bus          drivers.SPI
-	dcPin        machine.Pin
-	resetPin     machine.Pin
-	csPin        machine.Pin
-	blPin        machine.Pin
+	dcPin        drivers.PinOutputFunc
+	resetPin     drivers.PinOutputFunc
+	csPin        drivers.PinOutputFunc
+	blPin        drivers.PinOutputFunc
 	width        int16
 	height       int16
 	columnOffset int16
@@ -65,23 +65,23 @@ type Config struct {
 }
 
 // New creates a new ST7735 connection. The SPI wire must already be configured.
-func New(bus drivers.SPI, resetPin, dcPin, csPin, blPin machine.Pin) Device {
+func New(bus drivers.SPI, resetPin, dcPin, csPin, blPin drivers.PinOutput) Device {
 	return NewOf[pixel.RGB565BE](bus, resetPin, dcPin, csPin, blPin)
 }
 
 // NewOf creates a new ST7735 connection with a particular pixel format. The SPI
 // wire must already be configured.
-func NewOf[T Color](bus drivers.SPI, resetPin, dcPin, csPin, blPin machine.Pin) DeviceOf[T] {
-	dcPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	resetPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	csPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	blPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
+func NewOf[T Color](bus drivers.SPI, resetPin, dcPin, csPin, blPin drivers.PinOutput) DeviceOf[T] {
+	legacy.ConfigurePinOut(dcPin)
+	legacy.ConfigurePinOut(resetPin)
+	legacy.ConfigurePinOut(csPin)
+	legacy.ConfigurePinOut(blPin)
 	return DeviceOf[T]{
 		bus:      bus,
-		dcPin:    dcPin,
-		resetPin: resetPin,
-		csPin:    csPin,
-		blPin:    blPin,
+		dcPin:    dcPin.Set,
+		resetPin: resetPin.Set,
+		csPin:    csPin.Set,
+		blPin:    blPin.Set,
 	}
 }
 
@@ -423,7 +423,7 @@ func (d *DeviceOf[T]) Data(data uint8) {
 
 // Tx sends data to the display
 func (d *DeviceOf[T]) Tx(data []byte, isCommand bool) {
-	d.dcPin.Set(!isCommand)
+	d.dcPin(!isCommand)
 	d.bus.Tx(data, nil)
 }
 

st7789/st7789.go

@@ -7,13 +7,13 @@ package st7789 // import "tinygo.org/x/drivers/st7789"
 
 import (
 	"image/color"
-	"machine"
 	"math"
 	"time"
 
 	"errors"
 
 	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 	"tinygo.org/x/drivers/pixel"
 )
 
@@ -46,10 +46,10 @@ type Device = DeviceOf[pixel.RGB565BE]
 // formats.
 type DeviceOf[T Color] struct {
 	bus             drivers.SPI
-	dcPin           machine.Pin
-	resetPin        machine.Pin
-	csPin           machine.Pin
-	blPin           machine.Pin
+	dcPin           drivers.PinOutputFunc
+	resetPin        drivers.PinOutputFunc
+	csPin           drivers.PinOutputFunc
+	blPin           drivers.PinOutputFunc
 	width           int16
 	height          int16
 	columnOffsetCfg int16
@@ -83,23 +83,27 @@ type Config struct {
 }
 
 // New creates a new ST7789 connection. The SPI wire must already be configured.
-func New(bus drivers.SPI, resetPin, dcPin, csPin, blPin machine.Pin) Device {
+func New(bus drivers.SPI, resetPin, dcPin, csPin, blPin drivers.PinOutput) Device {
 	return NewOf[pixel.RGB565BE](bus, resetPin, dcPin, csPin, blPin)
 }
 
 // NewOf creates a new ST7789 connection with a particular pixel format. The SPI
 // wire must already be configured.
-func NewOf[T Color](bus drivers.SPI, resetPin, dcPin, csPin, blPin machine.Pin) DeviceOf[T] {
-	dcPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	resetPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	csPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	blPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
+func NewOf[T Color](bus drivers.SPI, resetPin, dcPin, csPin, blPin drivers.PinOutput) DeviceOf[T] {
+	legacy.ConfigurePinOut(dcPin)
+	legacy.ConfigurePinOut(resetPin)
+	legacy.ConfigurePinOut(csPin)
+	legacy.ConfigurePinOut(blPin)
+	var cs drivers.PinOutputFunc
+	if !legacy.PinIsNoPin(csPin) {
+		cs = csPin.Set
+	}
 	return DeviceOf[T]{
 		bus:      bus,
-		dcPin:    dcPin,
-		resetPin: resetPin,
-		csPin:    csPin,
-		blPin:    blPin,
+		dcPin:    dcPin.Set,
+		resetPin: resetPin.Set,
+		csPin:    cs,
+		blPin:    blPin.Set,
 	}
 }
 
@@ -229,7 +233,7 @@ func (d *DeviceOf[T]) sendCommand(command uint8, data []byte) error {
 // startWrite must be called at the beginning of all exported methods to set the
 // chip select pin low.
 func (d *DeviceOf[T]) startWrite() {
-	if d.csPin != machine.NoPin {
+	if d.csPin != nil {
 		d.csPin.Low()
 	}
 }
@@ -237,7 +241,7 @@ func (d *DeviceOf[T]) startWrite() {
 // endWrite must be called at the end of all exported methods to set the chip
 // select pin high.
 func (d *DeviceOf[T]) endWrite() {
-	if d.csPin != machine.NoPin {
+	if d.csPin != nil {
 		d.csPin.High()
 	}
 }

sx127x/sx127x.go

@@ -6,7 +6,6 @@ package sx127x
 
 import (
 	"errors"
-	"machine"
 	"time"
 
 	"tinygo.org/x/drivers"
@@ -21,15 +20,15 @@ const (
 
 // Device wraps an SPI connection to a SX127x device.
 type Device struct {
-	spi            drivers.SPI          // SPI bus for module communication
-	rstPin         machine.Pin          // GPIO for reset
-	radioEventChan chan lora.RadioEvent // Channel for Receiving events
-	loraConf       lora.Config          // Current Lora configuration
-	controller     RadioController      // to manage interactions with the radio
-	deepSleep      bool                 // Internal Sleep state
-	deviceType     int                  // sx1261,sx1262,sx1268 (defaults sx1261)
-	spiTxBuf       []byte               // global Tx buffer to avoid heap allocations in interrupt
-	spiRxBuf       []byte               // global Rx buffer to avoid heap allocations in interrupt
+	spi            drivers.SPI           // SPI bus for module communication
+	rstPin         drivers.PinOutputFunc // GPIO for reset
+	radioEventChan chan lora.RadioEvent  // Channel for Receiving events
+	loraConf       lora.Config           // Current Lora configuration
+	controller     RadioController       // to manage interactions with the radio
+	deepSleep      bool                  // Internal Sleep state
+	deviceType     int                   // sx1261,sx1262,sx1268 (defaults sx1261)
+	spiTxBuf       []byte                // global Tx buffer to avoid heap allocations in interrupt
+	spiRxBuf       []byte                // global Rx buffer to avoid heap allocations in interrupt
 }
 
 // --------------------------------------------------
@@ -43,10 +42,10 @@ func (d *Device) GetRadioEventChan() chan lora.RadioEvent {
 }
 
 // New creates a new SX127x connection. The SPI bus must already be configured.
-func New(spi drivers.SPI, rstPin machine.Pin) *Device {
+func New(spi drivers.SPI, rstPin drivers.PinOutput) *Device {
 	k := Device{
 		spi:            spi,
-		rstPin:         rstPin,
+		rstPin:         rstPin.Set,
 		radioEventChan: make(chan lora.RadioEvent, RADIOEVENTCHAN_SIZE),
 		spiTxBuf:       make([]byte, SPI_BUFFER_SIZE),
 		spiRxBuf:       make([]byte, SPI_BUFFER_SIZE),

uc8151/uc8151.go

@@ -8,10 +8,10 @@ package uc8151 // import "tinygo.org/x/drivers/uc8151"
 import (
 	"errors"
 	"image/color"
-	"machine"
 	"time"
 
 	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 	"tinygo.org/x/drivers/pixel"
 )
 
@@ -31,10 +31,10 @@ type Config struct {
 
 type Device struct {
 	bus                      drivers.SPI
-	cs                       machine.Pin
-	dc                       machine.Pin
-	rst                      machine.Pin
-	busy                     machine.Pin
+	cs                       drivers.PinOutputFunc
+	dc                       drivers.PinOutputFunc
+	rst                      drivers.PinOutputFunc
+	isBusy                   drivers.PinInputFunc
 	width                    int16
 	height                   int16
 	buffer                   []uint8
@@ -49,17 +49,17 @@ type Device struct {
 type Speed uint8
 
 // New returns a new uc8151 driver. Pass in a fully configured SPI bus.
-func New(bus drivers.SPI, csPin, dcPin, rstPin, busyPin machine.Pin) Device {
-	csPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	dcPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	rstPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	busyPin.Configure(machine.PinConfig{Mode: machine.PinInput})
+func New(bus drivers.SPI, csPin, dcPin, rstPin drivers.PinOutput, busyPin drivers.PinInput) Device {
+	legacy.ConfigurePinOut(csPin)
+	legacy.ConfigurePinOut(dcPin)
+	legacy.ConfigurePinOut(rstPin)
+	legacy.ConfigurePinInput(busyPin)
 	return Device{
-		bus:  bus,
-		cs:   csPin,
-		dc:   dcPin,
-		rst:  rstPin,
-		busy: busyPin,
+		bus:    bus,
+		cs:     csPin.Set,
+		dc:     dcPin.Set,
+		rst:    rstPin.Set,
+		isBusy: busyPin.Get,
 	}
 }
 
@@ -313,14 +313,14 @@ func (d *Device) ClearDisplay() {
 
 // WaitUntilIdle waits until the display is ready
 func (d *Device) WaitUntilIdle() {
-	for !d.busy.Get() {
+	for !d.isBusy() {
 		time.Sleep(10 * time.Millisecond)
 	}
 }
 
 // IsBusy returns the busy status of the display
 func (d *Device) IsBusy() bool {
-	return d.busy.Get()
+	return d.isBusy()
 }
 
 // ClearBuffer sets the buffer to 0xFF (white)

waveshare-epd/epd1in54/epd1in54.go

@@ -12,6 +12,9 @@ import (
 	"image/color"
 	"machine"
 	"time"
+
+	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 )
 
 type Config struct {
@@ -22,14 +25,14 @@ type Config struct {
 }
 
 type Device struct {
-	bus  *machine.SPI
-	cs   machine.Pin
-	dc   machine.Pin
-	rst  machine.Pin
-	busy machine.Pin
-
-	buffer   []uint8
-	rotation Rotation
+	bus           *machine.SPI
+	cs            drivers.PinOutputFunc
+	dc            drivers.PinOutputFunc
+	rst           drivers.PinOutputFunc
+	isBusy        drivers.PinInputFunc
+	configurePins func()
+	buffer        []uint8
+	rotation      Rotation
 }
 
 type Rotation uint8
@@ -79,22 +82,28 @@ var partialRefresh = [159]uint8{
 }
 
 // New returns a new epd1in54 driver. Pass in a fully configured SPI bus.
-func New(bus *machine.SPI, csPin, dcPin, rstPin, busyPin machine.Pin) Device {
+func New(bus *machine.SPI, csPin, dcPin, rstPin drivers.PinOutput, busyPin drivers.PinInput) Device {
 	return Device{
 		buffer: make([]uint8, (uint32(Width)*uint32(Height))/8),
 		bus:    bus,
-		cs:     csPin,
-		dc:     dcPin,
-		rst:    rstPin,
-		busy:   busyPin,
+		cs:     csPin.Set,
+		dc:     dcPin.Set,
+		rst:    rstPin.Set,
+		isBusy: busyPin.Get,
+		configurePins: func() {
+			legacy.ConfigurePinOut(csPin)
+			legacy.ConfigurePinOut(dcPin)
+			legacy.ConfigurePinOut(rstPin)
+			legacy.ConfigurePinInput(busyPin)
+		},
 	}
 }
 
 func (d *Device) LDirInit(cfg Config) {
-	d.cs.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.rst.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.dc.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.busy.Configure(machine.PinConfig{Mode: machine.PinInput})
+	if d.configurePins == nil {
+		panic(legacy.ErrConfigBeforeInstantiated)
+	}
+	d.configurePins()
 
 	d.bus.Configure(machine.SPIConfig{
 		Frequency: 2000000,
@@ -150,10 +159,10 @@ func (d *Device) LDirInit(cfg Config) {
 }
 
 func (d *Device) HDirInit(cfg Config) {
-	d.cs.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.rst.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.dc.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.busy.Configure(machine.PinConfig{Mode: machine.PinInput})
+	if d.configurePins == nil {
+		panic(legacy.ErrConfigBeforeInstantiated)
+	}
+	d.configurePins()
 
 	d.bus.Configure(machine.SPIConfig{
 		Frequency: 2000000,
@@ -369,7 +378,7 @@ func (d *Device) Clear() {
 
 // WaitUntilIdle waits until the display is ready
 func (d *Device) WaitUntilIdle() {
-	for d.busy.Get() {
+	for d.isBusy() {
 		time.Sleep(100 * time.Millisecond)
 	}
 	time.Sleep(200 * time.Millisecond)
@@ -377,7 +386,7 @@ func (d *Device) WaitUntilIdle() {
 
 // IsBusy returns the busy status of the display
 func (d *Device) IsBusy() bool {
-	return d.busy.Get()
+	return d.isBusy()
 }
 
 // ClearBuffer sets the buffer to 0xFF (white)

waveshare-epd/epd2in13/epd2in13.go

@@ -6,10 +6,10 @@ package epd2in13 // import "tinygo.org/x/drivers/waveshare-epd/epd2in13"
 import (
 	"errors"
 	"image/color"
-	"machine"
 	"time"
 
 	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 )
 
 type Config struct {
@@ -21,10 +21,10 @@ type Config struct {
 
 type Device struct {
 	bus          drivers.SPI
-	cs           machine.Pin
-	dc           machine.Pin
-	rst          machine.Pin
-	busy         machine.Pin
+	cs           drivers.PinOutputFunc
+	dc           drivers.PinOutputFunc
+	rst          drivers.PinOutputFunc
+	isBusy       drivers.PinInputFunc
 	logicalWidth int16
 	width        int16
 	height       int16
@@ -53,17 +53,17 @@ var lutPartialUpdate = [30]uint8{
 }
 
 // New returns a new epd2in13x driver. Pass in a fully configured SPI bus.
-func New(bus drivers.SPI, csPin, dcPin, rstPin, busyPin machine.Pin) Device {
-	csPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	dcPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	rstPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	busyPin.Configure(machine.PinConfig{Mode: machine.PinInput})
+func New(bus drivers.SPI, csPin, dcPin, rstPin drivers.PinOutput, busyPin drivers.PinInput) Device {
+	legacy.ConfigurePinOut(csPin)
+	legacy.ConfigurePinOut(dcPin)
+	legacy.ConfigurePinOut(rstPin)
+	legacy.ConfigurePinInput(busyPin)
 	return Device{
-		bus:  bus,
-		cs:   csPin,
-		dc:   dcPin,
-		rst:  rstPin,
-		busy: busyPin,
+		bus:    bus,
+		cs:     csPin.Set,
+		dc:     dcPin.Set,
+		rst:    rstPin.Set,
+		isBusy: busyPin.Get,
 	}
 }
 
@@ -298,14 +298,14 @@ func (d *Device) setMemoryPointer(x int16, y int16) {
 
 // WaitUntilIdle waits until the display is ready
 func (d *Device) WaitUntilIdle() {
-	for d.busy.Get() {
+	for d.isBusy() {
 		time.Sleep(100 * time.Millisecond)
 	}
 }
 
 // IsBusy returns the busy status of the display
 func (d *Device) IsBusy() bool {
-	return d.busy.Get()
+	return d.isBusy()
 }
 
 // ClearBuffer sets the buffer to 0xFF (white)

waveshare-epd/epd2in13x/epd2in13x.go

@@ -6,10 +6,10 @@ package epd2in13x // import "tinygo.org/x/drivers/waveshare-epd/epd2in13x"
 import (
 	"errors"
 	"image/color"
-	"machine"
 	"time"
 
 	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 )
 
 type Config struct {
@@ -20,10 +20,10 @@ type Config struct {
 
 type Device struct {
 	bus          drivers.SPI
-	cs           machine.Pin
-	dc           machine.Pin
-	rst          machine.Pin
-	busy         machine.Pin
+	cs           drivers.PinOutputFunc
+	dc           drivers.PinOutputFunc
+	rst          drivers.PinOutputFunc
+	isBusy       drivers.PinInputFunc
 	width        int16
 	height       int16
 	buffer       [][]uint8
@@ -33,17 +33,17 @@ type Device struct {
 type Color uint8
 
 // New returns a new epd2in13x driver. Pass in a fully configured SPI bus.
-func New(bus drivers.SPI, csPin, dcPin, rstPin, busyPin machine.Pin) Device {
-	csPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	dcPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	rstPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	busyPin.Configure(machine.PinConfig{Mode: machine.PinInput})
+func New(bus drivers.SPI, csPin, dcPin, rstPin drivers.PinOutput, busyPin drivers.PinInput) Device {
+	legacy.ConfigurePinOut(csPin)
+	legacy.ConfigurePinOut(dcPin)
+	legacy.ConfigurePinOut(rstPin)
+	legacy.ConfigurePinInput(busyPin)
 	return Device{
-		bus:  bus,
-		cs:   csPin,
-		dc:   dcPin,
-		rst:  rstPin,
-		busy: busyPin,
+		bus:    bus,
+		cs:     csPin.Set,
+		dc:     dcPin.Set,
+		rst:    rstPin.Set,
+		isBusy: busyPin.Get,
 	}
 }
 
@@ -277,14 +277,14 @@ func (d *Device) ClearDisplay() {
 
 // WaitUntilIdle waits until the display is ready
 func (d *Device) WaitUntilIdle() {
-	for !d.busy.Get() {
+	for !d.isBusy() {
 		time.Sleep(100 * time.Millisecond)
 	}
 }
 
 // IsBusy returns the busy status of the display
 func (d *Device) IsBusy() bool {
-	return d.busy.Get()
+	return d.isBusy()
 }
 
 // ClearBuffer sets the buffer to 0xFF (white)

waveshare-epd/epd2in66b/dev.go

@@ -5,7 +5,6 @@ package epd2in66b
 
 import (
 	"image/color"
-	"machine"
 	"time"
 
 	"tinygo.org/x/drivers"
@@ -18,19 +17,12 @@ const (
 
 const Baudrate = 4_000_000 // 4 MHz
 
-type Config struct {
-	ResetPin      machine.Pin
-	DataPin       machine.Pin
-	ChipSelectPin machine.Pin
-	BusyPin       machine.Pin
-}
-
 type Device struct {
-	bus  drivers.SPI
-	cs   machine.Pin
-	dc   machine.Pin
-	rst  machine.Pin
-	busy machine.Pin
+	bus    drivers.SPI
+	cs     drivers.PinOutputFunc
+	dc     drivers.PinOutputFunc
+	rst    drivers.PinOutputFunc
+	isBusy drivers.PinInputFunc
 
 	blackBuffer []byte
 	redBuffer   []byte
@@ -50,21 +42,6 @@ func New(bus drivers.SPI) Device {
 	}
 }
 
-// Configure configures the device and its pins.
-func (d *Device) Configure(c Config) error {
-	d.cs = c.ChipSelectPin
-	d.dc = c.DataPin
-	d.rst = c.ResetPin
-	d.busy = c.BusyPin
-
-	d.cs.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.dc.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.rst.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	d.busy.Configure(machine.PinConfig{Mode: machine.PinInput})
-
-	return nil
-}
-
 func (d *Device) Size() (x, y int16) {
 	return displayWidth, displayHeight
 }
@@ -229,7 +206,7 @@ func (d *Device) WaitUntilIdle() {
 	// give it some time to get busy
 	time.Sleep(50 * time.Millisecond)
 
-	for d.busy.Get() { // high = busy
+	for d.isBusy() { // high = busy
 		time.Sleep(10 * time.Millisecond)
 	}
 

waveshare-epd/epd2in66b/dev_baremetal.go

@@ -0,0 +1,30 @@
+//go:build baremetal
+
+package epd2in66b
+
+import "machine"
+
+type Config struct {
+	ResetPin      machine.Pin
+	DataPin       machine.Pin
+	ChipSelectPin machine.Pin
+	BusyPin       machine.Pin
+}
+
+// Configure configures the device and its pins.
+func (d *Device) Configure(c Config) error {
+	cs := c.ChipSelectPin
+	dc := c.DataPin
+	rst := c.ResetPin
+	busy := c.BusyPin
+
+	cs.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	dc.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	rst.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	busy.Configure(machine.PinConfig{Mode: machine.PinInput})
+	d.cs = cs.Set
+	d.dc = dc.Set
+	d.rst = rst.Set
+	d.isBusy = busy.Get
+	return nil
+}

waveshare-epd/epd2in9/epd2in9.go

@@ -13,10 +13,10 @@ package epd2in9 // import "tinygo.org/x/drivers/waveshare-epd/epd2in9"
 
 import (
 	"image/color"
-	"machine"
 	"time"
 
 	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 )
 
 type Config struct {
@@ -28,10 +28,10 @@ type Config struct {
 
 type Device struct {
 	bus          drivers.SPI
-	cs           machine.Pin
-	dc           machine.Pin
-	rst          machine.Pin
-	busy         machine.Pin
+	cs           drivers.PinOutputFunc
+	dc           drivers.PinOutputFunc
+	rst          drivers.PinOutputFunc
+	isBusy       drivers.PinInputFunc
 	logicalWidth int16
 	width        int16
 	height       int16
@@ -61,17 +61,17 @@ var lutPartialUpdate = [30]uint8{
 }
 
 // New returns a new epd2in9 driver. Pass in a fully configured SPI bus.
-func New(bus drivers.SPI, csPin, dcPin, rstPin, busyPin machine.Pin) Device {
-	csPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	dcPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	rstPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	busyPin.Configure(machine.PinConfig{Mode: machine.PinInput})
+func New(bus drivers.SPI, csPin, dcPin, rstPin drivers.PinOutput, busyPin drivers.PinInput) Device {
+	legacy.ConfigurePinOut(csPin)
+	legacy.ConfigurePinOut(dcPin)
+	legacy.ConfigurePinOut(rstPin)
+	legacy.ConfigurePinInput(busyPin)
 	return Device{
-		bus:  bus,
-		cs:   csPin,
-		dc:   dcPin,
-		rst:  rstPin,
-		busy: busyPin,
+		bus:    bus,
+		cs:     csPin.Set,
+		dc:     dcPin.Set,
+		rst:    rstPin.Set,
+		isBusy: busyPin.Get,
 	}
 }
 
@@ -245,14 +245,14 @@ func (d *Device) setMemoryPointer(x int16, y int16) {
 
 // WaitUntilIdle waits until the display is ready
 func (d *Device) WaitUntilIdle() {
-	for d.busy.Get() {
+	for d.isBusy() {
 		time.Sleep(100 * time.Millisecond)
 	}
 }
 
 // IsBusy returns the busy status of the display
 func (d *Device) IsBusy() bool {
-	return d.busy.Get()
+	return d.isBusy()
 }
 
 // ClearBuffer sets the buffer to 0xFF (white)

waveshare-epd/epd4in2/epd4in2.go

@@ -10,10 +10,10 @@ package epd4in2
 
 import (
 	"image/color"
-	"machine"
 	"time"
 
 	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/internal/legacy"
 )
 
 type Config struct {
@@ -25,10 +25,10 @@ type Config struct {
 
 type Device struct {
 	bus          drivers.SPI
-	cs           machine.Pin
-	dc           machine.Pin
-	rst          machine.Pin
-	busy         machine.Pin
+	cs           drivers.PinOutputFunc
+	dc           drivers.PinOutputFunc
+	rst          drivers.PinOutputFunc
+	isBusy       drivers.PinInputFunc
 	logicalWidth int16
 	width        int16
 	height       int16
@@ -40,17 +40,17 @@ type Device struct {
 type Rotation uint8
 
 // New returns a new epd4in2 driver. Pass in a fully configured SPI bus.
-func New(bus drivers.SPI, csPin, dcPin, rstPin, busyPin machine.Pin) Device {
-	csPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	dcPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	rstPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	busyPin.Configure(machine.PinConfig{Mode: machine.PinInput})
+func New(bus drivers.SPI, csPin, dcPin, rstPin drivers.PinOutput, busyPin drivers.PinInput) Device {
+	legacy.ConfigurePinOut(csPin)
+	legacy.ConfigurePinOut(dcPin)
+	legacy.ConfigurePinOut(rstPin)
+	legacy.ConfigurePinInput(busyPin)
 	return Device{
-		bus:  bus,
-		cs:   csPin,
-		dc:   dcPin,
-		rst:  rstPin,
-		busy: busyPin,
+		bus:    bus,
+		cs:     csPin.Set,
+		dc:     dcPin.Set,
+		rst:    rstPin.Set,
+		isBusy: busyPin.Get,
 	}
 }
 
@@ -311,14 +311,14 @@ func (d *Device) ClearDisplay() {
 
 // WaitUntilIdle waits until the display is ready
 func (d *Device) WaitUntilIdle() {
-	for d.busy.Get() {
+	for d.isBusy() {
 		time.Sleep(100 * time.Millisecond)
 	}
 }
 
 // IsBusy returns the busy status of the display
 func (d *Device) IsBusy() bool {
-	return d.busy.Get()
+	return d.isBusy()
 }
 
 // ClearBuffer sets the buffer to 0xFF (white)