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waveform_file_format.txt
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waveform_file_format.txt
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The waveform file holds both settings and signal data. The first 800 bytes are for the settings. The settings are stored as little endian 32 bit integers.
Then follows the signal data for channel 1, which is 3000 bytes and after that 3000 bytes for the channel 2 data. All samples are single byte values.
The checksum is calculated over all the data. It sums the 32 bit integers. It starts with 0 and also adds the not used in between words. The sample data is added in 4 byte chunks.
Look at the function "void scope_prepare_setup_for_file(void)" in the file "scope_functions.c" for how it is done.
The settings part holds the following data:
Byte offset Value Channel
0 Checksum x
4 File version x
40 Enable 1 (0 not enabled, 1 enabled)
44 Display volt per division 1 (Volt per division setting for what is displayed. Range 0 - 6)
48 Sample volt per division 1 (Volt per division setting for what is sampled. Range 0 - 6)
52 FFT enable 1 (0 not enabled, 1 enabled)
56 AC / DC coupling 1 (0 DC, 1 AC)
60 Probe magnification 1
64 Trace position on screen 1
68 Minimum measured 1
72 Maximum measured 1
76 Average measured 1
80 Center value measured 1
84 Peak peak value measured 1
88 Frequency valid 1
92 Frequency determined 1
96 Average Low time measured 1
100 Average high time measured 1
104 Average periode time measured 1
160 Enable 2
164 Display volt per division 2
168 Sample volt per division 2
172 FFT enable 2
176 AC / DC coupling 2
180 Probe magnification 2
184 Trace position on screen 2
188 Minimum measured 2
192 Maximum measured 2
196 Average measured 2
200 Center value measured 2
204 Peak peak value measured 2
208 Frequency valid 2
212 Frequency determined 2
216 Average Low time measured 2
220 Average high time measured 2
224 Average periode time measured 2
280 Time per division x
284 Sample rate x
288 Trigger mode x
292 Trigger edge x
296 Trigger channel x
300 Trigger level x
304 Trigger horizontal position x
308 Trigger vertical position x
312 Display have trigger x
316 Display trigger index x
400 Move speed x
404 Right menu state x
408 Screen brightness x
412 Grid brightness x
416 Always 50% trigger x
420 X-Y display mode x
424 Confirmation mode x
520 Time cursors enable x
524 Volt cursors enable x
528 Time cursor 1 position x
532 Time cursor 2 position x
536 Volt cursor 1 position x
540 Volt cursor 2 position x
640 Vmax enable 1
644 Vmin enable 1
648 Vavg enable 1
652 Vrms enable 1
656 Vpp enable 1
660 Vp enable 1
664 Freq enable 1
668 Cycle enable 1
672 Time+ enable 1
676 Time- enable 1
680 Duty+ enable 1
684 Duty- enable 1
688 Vmax enable 2
692 Vmin enable 2
696 Vavg enable 2
700 Vrms enable 2
704 Vpp enable 2
708 Vp enable 2
712 Freq enable 2
716 Cycle enable 2
720 Time+ enable 2
724 Time- enable 2
728 Duty+ enable 2
732 Duty- enable 2