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parser.go
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parser.go
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package upmuparser
import (
"encoding/binary"
"fmt"
"io"
)
const ReadingsPerStruct = 120
type Upmu_vector struct {
Phase_in_degrees float32
Fundamental_magnitude_volts float32
} // 8 bytes
type Upmu_one_second_set struct {
Sample_interval_in_milliseconds float32
Timestamp [6]int32
Status [120]int32
L1_e_vector_space [120]Upmu_vector
L2_e_vector_space [120]Upmu_vector
L3_e_vector_space [120]Upmu_vector
C1_e_vector_space [120]Upmu_vector
C2_e_vector_space [120]Upmu_vector
C3_e_vector_space [120]Upmu_vector
} // 6268 bytes
type Upmu_one_second_expansion_set_one struct {
Fundamental_watts_total [120]float32
Fundamental_var_total [120]float32
Fundamental_va_total [120]float32
Fundamental_dpf_total [120]float32
Frequency_l1_e_one_second [120]float32
Frequency_l1_e_c37 [120]float32
} // 2880 bytes
type Upmu_one_second_output_standard struct {
Data Upmu_one_second_set
Upmu_debug_info_pll [4]uint32 // the actual struct definition says 'umpu'
Upmu_debug_info_gps [7]float32
} // 6312 bytes
type Upmu_one_second_output_expansion_set_one struct {
Basic_data Upmu_one_second_output_standard
Expansion_set_one Upmu_one_second_expansion_set_one
} // 9192 bytes
const UPMU_ONE_SECOND_OUTPUT_STANDARD_SIZE int = 6312
const UPMU_ONE_SECOND_EXPANSION_SET_ONE_SIZE int = 2880
type Sync_Output_Type int
const (
OUTPUT_STANDARD Sync_Output_Type = iota
EXPANSION_SET_ONE
)
type Sync_Output struct {
Version Sync_Output_Type
Data Upmu_one_second_output_expansion_set_one
}
type decoder struct {
index int
data []uint8
}
func (d *decoder) Read(b []byte) (n int, err error) {
var i int
n = len(b)
var outOfSpace bool = false
if len(d.data)-d.index < n {
n = len(d.data) - d.index
outOfSpace = true
}
for i = 0; i < n; i++ {
b[i] = d.data[d.index+i]
}
d.index = d.index + n
if outOfSpace {
err = io.EOF
}
return
}
func (d *decoder) finished() bool {
return d.index == len(d.data)
}
func parse_sync_output(d *decoder) (*Sync_Output, error) {
var output *Sync_Output = &Sync_Output{}
var newversion bool = false
err := binary.Read(d, binary.LittleEndian, &output.Data.Basic_data)
if err != nil {
fmt.Printf("Error parsing sync_output (basic data): %v\n", err)
return nil, err
}
for _, status := range output.Data.Basic_data.Data.Status {
if status&0xe0 != 0 {
newversion = true
break
}
}
if newversion {
output.Version = EXPANSION_SET_ONE
err = binary.Read(d, binary.LittleEndian, &output.Data.Expansion_set_one)
if err != nil {
fmt.Printf("Error parsing sync_output (expansion set one): %v\n", err)
return nil, err
}
} else {
output.Version = OUTPUT_STANDARD
}
return output, nil
}
func ParseSyncOutArray(data []byte) ([]*Sync_Output, error) {
var dataLen int = len(data)
var numSyncOutputs int = dataLen / UPMU_ONE_SECOND_OUTPUT_STANDARD_SIZE
var dec *decoder = &decoder{index: 0, data: data}
var output *Sync_Output
var outputs = make([]*Sync_Output, 0, numSyncOutputs)
var err error = nil
for !dec.finished() && err == nil {
output, err = parse_sync_output(dec)
outputs = append(outputs, output)
}
return outputs, err
}
/* These are functions to use for getting values for streams. It's not concise,
but it's needed since the data is parsed to structs, which as far as I know
can't be subscripted with strings. */
func GetL1Mag(index int, obj *Sync_Output) float64 {
return float64(obj.Data.Basic_data.Data.L1_e_vector_space[index].Fundamental_magnitude_volts)
}
func GetL1Ang(index int, obj *Sync_Output) float64 {
return float64(obj.Data.Basic_data.Data.L1_e_vector_space[index].Phase_in_degrees)
}
func GetL2Mag(index int, obj *Sync_Output) float64 {
return float64(obj.Data.Basic_data.Data.L2_e_vector_space[index].Fundamental_magnitude_volts)
}
func GetL2Ang(index int, obj *Sync_Output) float64 {
return float64(obj.Data.Basic_data.Data.L2_e_vector_space[index].Phase_in_degrees)
}
func GetL3Mag(index int, obj *Sync_Output) float64 {
return float64(obj.Data.Basic_data.Data.L3_e_vector_space[index].Fundamental_magnitude_volts)
}
func GetL3Ang(index int, obj *Sync_Output) float64 {
return float64(obj.Data.Basic_data.Data.L3_e_vector_space[index].Phase_in_degrees)
}
func GetC1Mag(index int, obj *Sync_Output) float64 {
return float64(obj.Data.Basic_data.Data.C1_e_vector_space[index].Fundamental_magnitude_volts)
}
func GetC1Ang(index int, obj *Sync_Output) float64 {
return float64(obj.Data.Basic_data.Data.C1_e_vector_space[index].Phase_in_degrees)
}
func GetC2Mag(index int, obj *Sync_Output) float64 {
return float64(obj.Data.Basic_data.Data.C2_e_vector_space[index].Fundamental_magnitude_volts)
}
func GetC2Ang(index int, obj *Sync_Output) float64 {
return float64(obj.Data.Basic_data.Data.C2_e_vector_space[index].Phase_in_degrees)
}
func GetC3Mag(index int, obj *Sync_Output) float64 {
return float64(obj.Data.Basic_data.Data.C3_e_vector_space[index].Fundamental_magnitude_volts)
}
func GetC3Ang(index int, obj *Sync_Output) float64 {
return float64(obj.Data.Basic_data.Data.C3_e_vector_space[index].Phase_in_degrees)
}
func GetLockState(index int, obj *Sync_Output) float64 {
return float64(obj.Data.Basic_data.Data.Status[index])
}
func GetFundW(index int, obj *Sync_Output) float64 {
if obj.Version < EXPANSION_SET_ONE {
panic("invalid type for insert getter")
}
return float64(obj.Data.Expansion_set_one.Fundamental_watts_total[index])
}
func GetFundVar(index int, obj *Sync_Output) float64 {
if obj.Version < EXPANSION_SET_ONE {
panic("invalid type for insert getter")
}
return float64(obj.Data.Expansion_set_one.Fundamental_var_total[index])
}
func GetFundVA(index int, obj *Sync_Output) float64 {
if obj.Version < EXPANSION_SET_ONE {
panic("invalid type for insert getter")
}
return float64(obj.Data.Expansion_set_one.Fundamental_va_total[index])
}
func GetFundDPF(index int, obj *Sync_Output) float64 {
if obj.Version < EXPANSION_SET_ONE {
panic("invalid type for insert getter")
}
return float64(obj.Data.Expansion_set_one.Fundamental_dpf_total[index])
}
func GetFreqL11S(index int, obj *Sync_Output) float64 {
if obj.Version < EXPANSION_SET_ONE {
panic("invalid type for insert getter")
}
return float64(obj.Data.Expansion_set_one.Frequency_l1_e_one_second[index])
}
func GetFreqL1C37(index int, obj *Sync_Output) float64 {
if obj.Version < EXPANSION_SET_ONE {
panic("invalid type for insert getter")
}
return float64(obj.Data.Expansion_set_one.Frequency_l1_e_c37[index])
}
type InsertGetter func(int, *Sync_Output) float64
var STREAMS [19]string = [19]string{"L1MAG", "L1ANG", "L2MAG", "L2ANG", "L3MAG", "L3ANG", "C1MAG", "C1ANG", "C2MAG", "C2ANG", "C3MAG", "C3ANG", "LSTATE", "FUND_W", "FUND_VAR", "FUND_VA", "FUND_DPF", "FREQ_L1_1S", "FREQ_L1_C37"}
func (s *Sync_Output) GetInsertGetters() []InsertGetter {
var getters = make([]InsertGetter, 0, len(STREAMS))
if s.Version >= OUTPUT_STANDARD {
getters = append(getters, GetL1Mag, GetL1Ang, GetL2Mag, GetL2Ang, GetL3Mag, GetL3Ang, GetC1Mag, GetC1Ang, GetC2Mag, GetC2Ang, GetC3Mag, GetC3Ang, GetLockState)
}
if s.Version >= EXPANSION_SET_ONE {
getters = append(getters, GetFundW, GetFundVar, GetFundVA, GetFundDPF, GetFreqL11S, GetFreqL1C37)
}
return getters
}
func (s *Sync_Output) SampleRate() float32 {
return s.Data.Basic_data.Data.Sample_interval_in_milliseconds
}
func (s *Sync_Output) Times() [6]int32 {
return s.Data.Basic_data.Data.Timestamp
}