more drivers are now cross platform

easystepper/easystepper_baremetal.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.PinOutput{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
+}