Root/atusb/fw/an/README

Source at commit 78cfc8ffeb03a6fd6a1e63295c9d807eda84017d created 8 years 5 months ago.
By Werner Almesberger, moved atusb/fw3/ to atusb/fw/
1workflow:
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3- connect zprobe (note: it currently inverts because it didn't have any
4  other chips around. this may change later.)
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6- capture the USB signals at an interesting moment with a sample rate of
7  50 MSa/s
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9- zoom into the frame(s) of interest
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11- download the data with
12  ./get.py
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14- decode with
15  ./dec.py
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17  For manual decoding, set the coders to D+ and D- (we need D- for SE0
18  and SE1 detection), then click on a rising clock edge left of the
19  packet and move the cursor to the right.
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21- if there are problems with the clock, the analog signal and digital
22  signals derived from it can be examined after running dec.py with
23  ./plot
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25  (Note that the digital zprobe hides any analog anomalies.)
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