| // 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" |
| "encoding/csv" |
| "flag" |
| "log" |
| "os" |
| "os/signal" |
| "strconv" |
| |
| "fuchsia.googlesource.com/zedmon" |
| "github.com/google/subcommands" |
| ) |
| |
| type recordCmd struct{} |
| |
| // Flag-controlled values. |
| var out string |
| var writeHeader bool |
| var resistance float64 |
| |
| func (*recordCmd) Name() string { return "record" } |
| func (*recordCmd) Synopsis() string { |
| return "Record data from zedmon. Saves to zedmon.csv or streams to stdout." |
| } |
| func (*recordCmd) Usage() string { |
| return `record |
| ` |
| } |
| |
| func (*recordCmd) SetFlags(flags *flag.FlagSet) { |
| setCommonFlags(flags) |
| flags.StringVar(&out, "out", "zedmon.csv", "Output file. Specify \"-\" for stdout.") |
| flags.BoolVar(&writeHeader, "header", false, "Whether to include a header line in the output.") |
| } |
| |
| // If a positive resistance and field names including "v_bus" and "v_shunt" are provided, returns a |
| // function that calculates power from zedmon-provided values. Returns nil otherwise. |
| func getPowerCalculator(resistance float64, fieldNames []string) func(values []float64) float64 { |
| if resistance <= 0.0 { |
| return nil |
| } |
| |
| vBusIndex := -1 |
| vShuntIndex := -1 |
| for i, name := range fieldNames { |
| if name == "v_bus" { |
| vBusIndex = i |
| } else if name == "v_shunt" { |
| vShuntIndex = i |
| } |
| } |
| if vBusIndex < 0 || vShuntIndex < 0 { |
| return nil |
| } |
| |
| return func(values []float64) float64 { |
| return values[vShuntIndex] * values[vBusIndex] / resistance |
| } |
| } |
| |
| func (*recordCmd) Execute(_ context.Context, _ *flag.FlagSet, _ ...interface{}) subcommands.ExitStatus { |
| zedmon, err := zedmon.OpenZedmon(getConfig()) |
| if err != nil { |
| log.Printf("Can't open zendmon: %v", err) |
| return subcommands.ExitFailure |
| } |
| defer zedmon.Close() |
| |
| var f *os.File |
| if out == "-" { |
| f = os.Stdout |
| } else { |
| f, err = os.OpenFile(out, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0666) |
| if err != nil { |
| log.Printf("Can't open %s: %v", out, err) |
| return subcommands.ExitFailure |
| } |
| defer f.Close() |
| } |
| |
| offset, delta, err := zedmon.GetTimeOffset() |
| if err != nil { |
| log.Printf("Get time offset: %v", err) |
| return subcommands.ExitFailure |
| } |
| log.Printf("Time offset: %dns ± %dns\n", offset.Nanoseconds(), delta.Nanoseconds()) |
| |
| termChan := make(chan os.Signal, 1) |
| signal.Notify(termChan, os.Interrupt) |
| |
| writer := csv.NewWriter(f) |
| defer writer.Flush() |
| |
| log.Println("Starting report recording. Send ^C to stop.") |
| zedmon.EnableReporting() |
| |
| fieldNames := zedmon.GetFieldNames() |
| |
| var calculatePower func(values []float64) float64 = nil |
| resistance, err := zedmon.GetShuntResistance() |
| if err != nil { |
| log.Println("Error fetching resistance:", err) |
| log.Println("Power will not be calculated.") |
| } else { |
| calculatePower = getPowerCalculator(resistance, fieldNames) |
| } |
| |
| if calculatePower != nil { |
| fieldNames = append(fieldNames, "power") |
| } |
| |
| if writeHeader { |
| header := make([]string, 1+len(fieldNames)) |
| header[0] = "timestamp" |
| copy(header[1:], fieldNames) |
| writer.Write(header) |
| } |
| |
| RecordSampling: |
| for { |
| reports, err := zedmon.ReadReports() |
| if err != nil { |
| log.Printf("Error reading reports: %v", err) |
| continue |
| } |
| for _, report := range reports { |
| record := make([]string, 0, len(fieldNames)) |
| record = append(record, strconv.FormatUint(report.Timestamp, 10)) |
| for _, value := range report.Values { |
| record = append(record, strconv.FormatFloat(value, 'g', -1, 64)) |
| } |
| if calculatePower != nil { |
| power := calculatePower(report.Values) |
| record = append(record, strconv.FormatFloat(power, 'g', -1, 64)) |
| } |
| writer.Write(record) |
| } |
| |
| select { |
| case <-termChan: |
| break RecordSampling |
| default: |
| } |
| } |
| log.Println("Stopping report recording.") |
| |
| return subcommands.ExitSuccess |
| } |