| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| package main |
| |
| import ( |
| "context" |
| "flag" |
| "fmt" |
| "strconv" |
| |
| "fuchsia.googlesource.com/zedmon" |
| "github.com/google/subcommands" |
| ) |
| |
| type gpioCmd struct{} |
| |
| func (*gpioCmd) Name() string { return "gpio" } |
| func (*gpioCmd) Synopsis() string { return "Control Zedmon gpio." } |
| func (*gpioCmd) Usage() string { |
| return `gpio <index> 0|1 |
| ` |
| } |
| |
| func (*gpioCmd) SetFlags(flags *flag.FlagSet) { |
| setCommonFlags(flags) |
| } |
| |
| func (*gpioCmd) Execute(_ context.Context, f *flag.FlagSet, _ ...interface{}) subcommands.ExitStatus { |
| zedmon, err := zedmon.OpenZedmon(getConfig()) |
| if err != nil { |
| fmt.Printf("Can't open zendmon: %v", err) |
| return subcommands.ExitFailure |
| } |
| defer zedmon.Close() |
| |
| args := f.Args() |
| if len(args) != 2 { |
| fmt.Println("Wrong number of arguments.") |
| return subcommands.ExitUsageError |
| } |
| |
| index, err := strconv.Atoi(args[0]) |
| if err != nil { |
| fmt.Printf("Can't parse index %s: %v", args[0], err) |
| return subcommands.ExitUsageError |
| } |
| if !(0 <= index && index <= 254) { |
| fmt.Printf("Index out of range: %v", index) |
| return subcommands.ExitUsageError |
| } |
| |
| var state bool |
| switch args[1] { |
| case "1": |
| state = true |
| case "0": |
| state = false |
| default: |
| fmt.Printf("Unknown state %s\n", args[1]) |
| return subcommands.ExitUsageError |
| } |
| |
| err = zedmon.SetOuput(uint8(index+1), state) |
| if err != nil { |
| fmt.Println(err.Error()) |
| return subcommands.ExitFailure |
| } |
| |
| return subcommands.ExitSuccess |
| } |