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Add check to scaling factors

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Fix scaling append
This commit is contained in:
Nicholas Thompson
2020-09-09 18:11:57 +02:00
parent 3f783fabf8
commit 5fb5ce5f12
1 changed files with 49 additions and 20 deletions
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53
mk2driver/mk2.go
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@@ -13,8 +13,29 @@ import (
type scaling struct {
scale float64
offset float64
supported bool
}
const (
ramVarVMains = iota
ramVarIMains
ramVarVInverter
ramVarIInverter
ramVarVBat
ramVarIBat
ramVarVBatRipple
ramVarInverterPeriod
ramVarMainPeriod
ramVarIACLoad
ramVarVirSwitchPos
ramVarIgnACInState
ramVarMultiFuncRelay
ramVarChargeState
ramVarInverterPower1
ramVarInverterPower2
ramVarOutPower
)
type mk2Ser struct {
info *Mk2Info
p io.ReadWriter
@@ -179,18 +200,23 @@ func (m *mk2Ser) reqScaleFactor(in byte) {
// Decode the scale factor frame.
func (m *mk2Ser) scaleDecode(frame []byte) {
tmp := scaling{}
if len(frame) <= 2 {
tmp.supported = false
log.Printf("Skiping scaling factors for: %d", m.scaleCount)
} else {
tmp.supported = true
scl := uint16(frame[2])<<8 + uint16(frame[1])
ofs := int16(uint16(frame[5])<<8 + uint16(frame[4]))
tmp := scaling{}
tmp.offset = float64(ofs)
if scl >= 0x4000 {
tmp.scale = math.Abs(1 / (0x8000 - float64(scl)))
} else {
tmp.scale = math.Abs(float64(scl))
}
}
m.scales = append(m.scales, tmp)
m.scaleCount++
if m.scaleCount < 14 {
m.reqScaleFactor(byte(m.scaleCount))
@@ -222,6 +248,9 @@ func (m *mk2Ser) versionDecode(frame []byte) {
// Apply scaling to float
func (m *mk2Ser) applyScale(value float64, scale int) float64 {
if !m.scales[scale].supported {
return value
}
return m.scales[scale].scale * (value + m.scales[scale].offset)
}
@@ -237,13 +266,13 @@ func getUnsigned(data []byte) float64 {
// Decodes DC frame.
func (m *mk2Ser) dcDecode(frame []byte) {
m.info.BatVoltage = m.applyScale(getSigned(frame[5:7]), 4)
m.info.BatVoltage = m.applyScale(getSigned(frame[5:7]), ramVarVBat)
usedC := m.applyScale(getUnsigned(frame[7:10]), 5)
chargeC := m.applyScale(getUnsigned(frame[10:13]), 5)
usedC := m.applyScale(getUnsigned(frame[7:10]), ramVarIBat)
chargeC := m.applyScale(getUnsigned(frame[10:13]), ramVarIBat)
m.info.BatCurrent = usedC - chargeC
m.info.OutFrequency = 10 / (m.applyScale(float64(frame[13]), 7))
m.info.OutFrequency = 10 / (m.applyScale(float64(frame[13]), ramVarInverterPeriod))
// Send L1 status request
cmd := make([]byte, 2)
@@ -254,15 +283,15 @@ func (m *mk2Ser) dcDecode(frame []byte) {
// Decodes AC frame.
func (m *mk2Ser) acDecode(frame []byte) {
m.info.InVoltage = m.applyScale(getSigned(frame[5:7]), 0)
m.info.InCurrent = m.applyScale(getSigned(frame[7:9]), 1)
m.info.OutVoltage = m.applyScale(getSigned(frame[9:11]), 2)
m.info.OutCurrent = m.applyScale(getSigned(frame[11:13]), 3)
m.info.InVoltage = m.applyScale(getSigned(frame[5:7]), ramVarVMains)
m.info.InCurrent = m.applyScale(getSigned(frame[7:9]), ramVarIMains)
m.info.OutVoltage = m.applyScale(getSigned(frame[9:11]), ramVarVInverter)
m.info.OutCurrent = m.applyScale(getSigned(frame[11:13]), ramVarIInverter)
if frame[13] == 0xff {
m.info.InFrequency = 0
} else {
m.info.InFrequency = 10 / (m.applyScale(float64(frame[13]), 8))
m.info.InFrequency = 10 / (m.applyScale(float64(frame[13]), ramVarMainPeriod))
}
// Send status request
@@ -273,7 +302,7 @@ func (m *mk2Ser) acDecode(frame []byte) {
// Decode charge state of battery.
func (m *mk2Ser) stateDecode(frame []byte) {
m.info.ChargeState = m.applyScale(getSigned(frame[1:3]), 13)
m.info.ChargeState = m.applyScale(getSigned(frame[1:3]), ramVarChargeState)
m.updateReport()
}