sx127x: add RadioController interface to match sx126x

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

sx127x/radiocontrol_pins.go

@@ -0,0 +1,55 @@
+package sx127x
+
+import (
+	"machine"
+)
+
+// RadioControl for boards that are connected using normal pins.
+type RadioControl struct {
+	nssPin, dio0Pin, dio1Pin machine.Pin
+}
+
+func NewRadioControl(nssPin, dio0Pin, dio1Pin machine.Pin) *RadioControl {
+	return &RadioControl{
+		nssPin:  nssPin,
+		dio0Pin: dio0Pin,
+		dio1Pin: dio1Pin,
+	}
+}
+
+// SetNss sets the NSS line aka chip select for SPI.
+func (rc *RadioControl) SetNss(state bool) error {
+	rc.nssPin.Set(state)
+	return nil
+}
+
+// Init() configures whatever needed for sx127x radio control
+func (rc *RadioControl) Init() error {
+	rc.nssPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	rc.dio0Pin.Configure(machine.PinConfig{Mode: machine.PinInputPulldown})
+	rc.dio1Pin.Configure(machine.PinConfig{Mode: machine.PinInputPulldown})
+	return nil
+}
+
+// add interrupt handlers for Radio IRQs for pins
+func (rc *RadioControl) SetupInterrupts(handler func()) error {
+	irqHandler = handler
+
+	// Setup DIO0 interrupt Handling
+	if err := rc.dio0Pin.SetInterrupt(machine.PinRising, handleInterrupt); err != nil {
+		return err
+	}
+
+	// Setup DIO1 interrupt Handling
+	if err := rc.dio1Pin.SetInterrupt(machine.PinRising, handleInterrupt); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+var irqHandler func()
+
+func handleInterrupt(machine.Pin) {
+	irqHandler()
+}