RSDK-5412: add an esp32 board for the config schema (#4165)

Author: stevebriskin

components/board/esp32/board.go

@@ -0,0 +1,68 @@
+// Package esp32 exists for the sole purpose of exposing the esp32 as a micro-rdk configuration in app.viam.com
+// The ESP32 is supported by the micro-rdk only (https://github.com/viamrobotics/micro-rdk)
+package esp32
+
+import (
+	"context"
+
+	"github.com/pkg/errors"
+
+	"go.viam.com/rdk/components/board"
+	"go.viam.com/rdk/logging"
+	"go.viam.com/rdk/resource"
+)
+
+var (
+	espModel       = resource.DefaultModelFamily.WithModel("esp32")
+	errUnsupported = errors.New("The ESP32 board is not supported in the RDK. " +
+		"Please use with the micro-rdk (https://github.com/viamrobotics/micro-rdk).")
+)
+
+type digitalInterruptConfig struct {
+	Pin int `json:"pin"`
+}
+
+type analogConfig struct {
+	Name string `json:"name"`
+	Pin  int    `json:"pin"`
+}
+
+type i2CConfig struct {
+	Name     string `json:"name"`
+	Bus      string `json:"bus"`
+	DataPin  int    `json:"data_pin,omitempty"`
+	ClockPin int    `json:"clock_pin,omitempty"`
+	BaudRate int    `json:"baudrate_hz,omitempty"`
+	Timeout  int    `json:"timeout_ns,omitempty"`
+}
+
+// Config mirrors the config structure in (https://github.com/viamrobotics/micro-rdk/blob/main/micro-rdk/src/esp32/board.rs).
+type Config struct {
+	Pins              []int                    `json:"pins,omitempty"`
+	DigitalInterrupts []digitalInterruptConfig `json:"digital_interrupts,omitempty"`
+	Analogs           []analogConfig           `json:"analogs,omitempty"`
+	I2Cs              []i2CConfig              `json:"i2cs,omitempty"`
+}
+
+func init() {
+	resource.RegisterComponent(
+		board.API,
+		espModel,
+		resource.Registration[board.Board, *Config]{
+			Constructor: newEsp32Board,
+		})
+}
+
+// Validate for esp32 will always return an unsupported error.
+func (conf *Config) Validate(path string) ([]string, error) {
+	return []string{}, errUnsupported
+}
+
+func newEsp32Board(
+	ctx context.Context,
+	deps resource.Dependencies,
+	conf resource.Config,
+	logger logging.Logger,
+) (board.Board, error) {
+	return nil, errUnsupported
+}

components/board/register/register.go

@@ -5,6 +5,7 @@ import (
 	// for boards.
 	_ "go.viam.com/rdk/components/board/beaglebone"
 	_ "go.viam.com/rdk/components/board/customlinux"
+	_ "go.viam.com/rdk/components/board/esp32"
 	_ "go.viam.com/rdk/components/board/fake"
 	_ "go.viam.com/rdk/components/board/hat/pca9685"
 	_ "go.viam.com/rdk/components/board/jetson"