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| 1 | +package main |
| 2 | + |
| 3 | +import ( |
| 4 | + "encoding/binary" |
| 5 | + "fmt" |
| 6 | + "os" |
| 7 | + "time" |
| 8 | +) |
| 9 | + |
| 10 | +type LogHeader struct { |
| 11 | + NextPageAddress uint32 |
| 12 | + PagesPerTick uint16 |
| 13 | + TickDuration uint16 |
| 14 | + StartTime int64 |
| 15 | +} |
| 16 | + |
| 17 | +type BaroConfig struct { |
| 18 | + PressureOversampleCount uint8 |
| 19 | + TemperatureOversampleCount uint8 |
| 20 | + AltitudeScaleFactor float32 |
| 21 | + SeaLevelPressure float32 |
| 22 | +} |
| 23 | + |
| 24 | +type IMUConfig struct { |
| 25 | + FifoODR uint16 |
| 26 | + GyroODR uint16 |
| 27 | + AccelerometerODR uint16 |
| 28 | + GyroDecimation uint8 |
| 29 | + AccelerometerDecimation uint8 |
| 30 | + TemperatureSensorDecimation uint8 |
| 31 | + GyroFullRangeScale uint16 |
| 32 | + AccelerometerFullRangeScale uint16 |
| 33 | +} |
| 34 | + |
| 35 | +type TickData struct { |
| 36 | + TimeSinceBoot int64 |
| 37 | + RocketState uint32 |
| 38 | + AltitudeRelSeaLevel float32 |
| 39 | + AltitudeRelGround float32 |
| 40 | + Pressure float32 |
| 41 | + Temperature float32 |
| 42 | + IMUData IMUData |
| 43 | +} |
| 44 | + |
| 45 | +type IMUData struct { |
| 46 | + TemperatureAtTickStart int16 |
| 47 | + AngularVelocity [3]int16 |
| 48 | + Acceleration [3]int16 |
| 49 | + Alignment uint16 |
| 50 | + FifoPatternIndex uint16 |
| 51 | + FifoValueSampleCount uint16 |
| 52 | + FifoValues []int16 |
| 53 | +} |
| 54 | + |
| 55 | +func read() { |
| 56 | + file, err := os.Open("logfile.bin") |
| 57 | + if err != nil { |
| 58 | + fmt.Println("Error opening file:", err) |
| 59 | + return |
| 60 | + } |
| 61 | + defer func(file *os.File) { |
| 62 | + err := file.Close() |
| 63 | + if err != nil { |
| 64 | + fmt.Println("Error closing file:", err) |
| 65 | + } |
| 66 | + }(file) |
| 67 | + |
| 68 | + var header LogHeader |
| 69 | + err = binary.Read(file, binary.LittleEndian, &header) |
| 70 | + if err != nil { |
| 71 | + fmt.Println("Error reading header:", err) |
| 72 | + return |
| 73 | + } |
| 74 | + |
| 75 | + var baroConfig BaroConfig |
| 76 | + err = binary.Read(file, binary.LittleEndian, &baroConfig) |
| 77 | + if err != nil { |
| 78 | + fmt.Println("Error reading baro config:", err) |
| 79 | + return |
| 80 | + } |
| 81 | + |
| 82 | + var imuConfig IMUConfig |
| 83 | + err = binary.Read(file, binary.LittleEndian, &imuConfig) |
| 84 | + if err != nil { |
| 85 | + fmt.Println("Error reading IMU config:", err) |
| 86 | + return |
| 87 | + } |
| 88 | + |
| 89 | + fmt.Printf("Log Start Time: %s\n", time.Unix(0, header.StartTime*int64(time.Millisecond)).Format(time.RFC3339)) |
| 90 | + fmt.Printf("Tick Duration: %d ms\n", header.TickDuration) |
| 91 | + fmt.Printf("Baro Config: %+v\n", baroConfig) |
| 92 | + fmt.Printf("IMU Config: %+v\n", imuConfig) |
| 93 | + |
| 94 | + for { |
| 95 | + var tickData TickData |
| 96 | + err = binary.Read(file, binary.LittleEndian, &tickData.TimeSinceBoot) |
| 97 | + if err != nil { |
| 98 | + break |
| 99 | + } |
| 100 | + err = binary.Read(file, binary.LittleEndian, &tickData.RocketState) |
| 101 | + if err != nil { |
| 102 | + break |
| 103 | + } |
| 104 | + err = binary.Read(file, binary.LittleEndian, &tickData.AltitudeRelSeaLevel) |
| 105 | + if err != nil { |
| 106 | + break |
| 107 | + } |
| 108 | + err = binary.Read(file, binary.LittleEndian, &tickData.AltitudeRelGround) |
| 109 | + if err != nil { |
| 110 | + break |
| 111 | + } |
| 112 | + err = binary.Read(file, binary.LittleEndian, &tickData.Pressure) |
| 113 | + if err != nil { |
| 114 | + break |
| 115 | + } |
| 116 | + err = binary.Read(file, binary.LittleEndian, &tickData.Temperature) |
| 117 | + if err != nil { |
| 118 | + break |
| 119 | + } |
| 120 | + |
| 121 | + var imuData IMUData |
| 122 | + err = binary.Read(file, binary.LittleEndian, &imuData.TemperatureAtTickStart) |
| 123 | + if err != nil { |
| 124 | + break |
| 125 | + } |
| 126 | + err = binary.Read(file, binary.LittleEndian, &imuData.AngularVelocity) |
| 127 | + if err != nil { |
| 128 | + break |
| 129 | + } |
| 130 | + err = binary.Read(file, binary.LittleEndian, &imuData.Acceleration) |
| 131 | + if err != nil { |
| 132 | + break |
| 133 | + } |
| 134 | + err = binary.Read(file, binary.LittleEndian, &imuData.Alignment) |
| 135 | + if err != nil { |
| 136 | + break |
| 137 | + } |
| 138 | + err = binary.Read(file, binary.LittleEndian, &imuData.FifoPatternIndex) |
| 139 | + if err != nil { |
| 140 | + break |
| 141 | + } |
| 142 | + err = binary.Read(file, binary.LittleEndian, &imuData.FifoValueSampleCount) |
| 143 | + if err != nil { |
| 144 | + break |
| 145 | + } |
| 146 | + |
| 147 | + imuData.FifoValues = make([]int16, imuData.FifoValueSampleCount) |
| 148 | + err = binary.Read(file, binary.LittleEndian, &imuData.FifoValues) |
| 149 | + if err != nil { |
| 150 | + break |
| 151 | + } |
| 152 | + |
| 153 | + tickData.IMUData = imuData |
| 154 | + |
| 155 | + fmt.Printf("Tick Data: %+v\n", tickData) |
| 156 | + } |
| 157 | +} |
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