Full ("not used" members included) Tektronix WFM v.3 C headers and Python
ctypes bindings, with reference documentation inline.
I have included a native library that loads a WFM with mmap as an
example and quickstart. However, the definitions in wfm.py and wfm.h
will work no matter how you load your waveform data (you will have to
implement something similar to map_wfm() in wfm.c).
Every struct member and enumeration item in wfm.h is documented in detail.
All documentation is copied nearly verbatim from the Tektronix-published WFM
Format Reference, with some slight modifications.
Shows almost all fields included in the header and bindings.
$ make
gcc -shared -fPIC -O3 -s -o libwfm.so wfm.c
$ ./wfm-info.py ch3.wfm
Waveform: ch3.wfm
Static
ByteOrderVerification 3855
VersionNumber :WFM#003
ByteCountDigits 7
BytesRemaining 3302777
BytesPerPoint 2
CurveBufferOffset 54784
HorizontalZoomScaleFactor 1
HorizontalZoomPosition 0.0
VerticalZoomScaleFactor 1.0
VerticalZoomPosition 0.0
Label <EMPTY>
NFastFrames 999
HdrSize 512
Hdr
Ref
SetType FASTFRAME (1)
WfmCnt 1
AcquisitionCounter 0
TransactionCounter 0
SlotID 5
IsStatic 0
UpdateSpecCount 1
ImpDimRefCount 1
ExpDimRefCount 1
DataType VECTOR (2)
GeneralPurposeCounter 0
AccumulatedWfmCount 1
TargetAccumulationCount 1
CurveRefCount 1
NFastFramesRequested 1000
NFastFramesAcquired 1000
SummaryFrame OFF (0)
PixmapDsyFormat INVALID (0)
PixmapMaxValue 0
ExpDim1
Scale 4.1015625e-05
Offset 0.8505000000000001
Size 0
Units V
ExtentMin 0.0
ExtentMax 0.0
Resolution 1.0
RefPoint 0.0
Format INT16 (0)
StorageType SAMPLE (0)
NullValue <wfm.WfmExpDimDescInfoNullValue object at 0x723b241348d0>
OverRange 0
UnderRange 0
HighRange 0
LowRange 0
UserView
Scale 0.407391796875
Units V
Offset -2.1117834202525025
PointDensity 1.0
HRef 50.0
TrigDelay 0.0
ExpDim2
Scale 0.0
Offset 0.0
Size 0
Units <EMPTY>
ExtentMin 0.0
ExtentMax 0.0
Resolution 0.0
RefPoint 0.0
Format INVALID_FORMAT (9)
StorageType INVALID_STORAGE (6)
NullValue <wfm.WfmExpDimDescInfoNullValue object at 0x723b24134850>
OverRange 0
UnderRange 0
HighRange 0
LowRange 0
UserView
Scale 0.0
Units <EMPTY>
Offset 0.0
PointDensity 0.0
HRef 0.0
TrigDelay 0.0
ImpDim1
Scale 8e-11
Offset -6.239999999999999e-08
Size 1560
Units s
ExtentMin 0.0
ExtentMax 0.0
Resolution 0.0
RefPoint 0.0
Spacing 0
UserView
Scale 1.2479999999999998e-08
Units s
Offset 0.0
PointDensity 1.0
HRef 50.0
TrigDelay -6.23475e-08
ImpDim2
Scale 0.0
Offset 0.0
Size 0
Units <EMPTY>
ExtentMin 0.0
ExtentMax 0.0
Resolution 0.0
RefPoint 0.0
Spacing 0
UserView
Scale 0.0
Units <EMPTY>
Offset 0.0
PointDensity 0.0
HRef 0.0
TrigDelay 0.0
TimeBaseInfo1
RealPointSpacing 1
Sweep SAMPLE (1)
Type TIME (0)
TimeBaseInfo2
RealPointSpacing 0
Sweep INVALID (3)
Type INVALID (3)
UpdateSpec
RealPointOffset 0
TTOffset 0.65625
FracSec 0.334003403705
GMTSec 1716334508
CurveSpec
StateFlags 162
ChecksumType NO_CHECKSUM (0)
Checksum 0
PrechargeStart 0
DataStart 64
PostchargeStart 3184
PostchargeStop 3248
CurveBufferEnd 3248
FastFrames
UpdateSpecs <wfm.LP_WfmUpdateSpec object at 0x723b241349d0>
CurveSpecs <wfm.LP_WfmCurveSpec object at 0x723b24134950>
CurveBuffer <BINARY>
Checksum 450274367
Size 3302871