src/chromiumos/tast/remote/firmware/codelab/codelab_servo.txt

// Copyright 2021 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package firmware

import (
	"context"

	"chromiumos/tast/remote/firmware"
	"chromiumos/tast/remote/firmware/reporters"
	"chromiumos/tast/common/servo"
	"chromiumos/tast/testing"
	"chromiumos/tast/testing/hwdep"
)

func init() {
	testing.AddTest(&testing.Test{
		Func: CodelabServo,
		Desc: "Demonstrates common functionality for remote firmware tests",
		Contacts: []string{
			"me@chromium.org",      // Test author
			"my-team@chromium.org", // Backup mailing list
		},
		Data: []string{firmware.ConfigFile},
		Attr:         []string{"group:firmware", "firmware_experimental"},
		HardwareDeps: hwdep.D(hwdep.ChromeEC()),
		Vars:         []string{"servo"},
	})
}

// CodelabServo demonstrates sending commands via Servo.
func CodelabServo(ctx context.Context, s *testing.State) {
	r := reporters.New(s.DUT())
	board, err := r.Board(ctx)
	if err != nil {
		s.Fatal("Failed to report board: ", err)
	}
	model, err := r.Model(ctx)
	if err != nil {
		s.Fatal("Failed to report model: ", err)
	}
	s.Logf("Reported board=%s, model=%s", board, model)

	cfg, err := firmware.NewConfig(s.DataPath(firmware.ConfigFile), board, model)
	if err != nil {
		s.Fatal("Failed to create config: ", err)
	}
	s.Log("This DUT's mode-switcher type is: ", cfg.ModeSwitcherType)

	// Set up Servo
	dut := s.DUT()
	servoSpec, _ := s.Var("servo")
	pxy, err := servo.NewProxy(ctx, servoSpec, dut.KeyFile(), dut.KeyDir())
	if err != nil {
		s.Fatal("Failed to connect to servo: ", err)
	}
	defer pxy.Close(ctx)

	// Get the DUT's ec_board via Servo
	ecBoard, err := pxy.Servo().GetString(ctx, servo.ECBoard)
	if err != nil {
		s.Fatal("Getting ec_board control from servo: ", err)
	}
	s.Log("EC Board: ", ecBoard)
}