User:PeterMortensen

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Revision as of 13:57, 30 December 2017 by PeterMortensen (talk | contribs) (→‎2017-12: More detail.)
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Recent activity

2017-12

Recording 23483 traces for the purpose of evaluating a proposed fix to the CAN protocol decoder, stuff bit at the very end of the CRC segment, with a modified trigger scheme: change the position of the trigger point at the end so there is always a CAN message in the trace (for the previous), but still 26 us recessive. The time division was 100 us / div (about 225 bit times max) to always record whole CAN messages - at 10 samples per bit time.

2017-07

Using the sigrok command-line ("sigrok-cli") to bulk process data derived from Tektronix oscilloscope data of 250 kbit/s CAN traffic on a real-world system (mobile cranes). The first sample data set is 5335 oscilloscope traces obtained with the trigger set to a negative pulse on CAN-H (to start off at the end of a CAN message) - corresponding to 6.5 recessive bits, 26 µsec (detecting the space in-between CAN messages). Sometimes there is a CAN message right after this, sometimes it is a bit delayed, and sometimes it is completely empty.

A sample command line (on Windows) is:

sigrok-cli -P can:bitrate=250000:can_rx="CAN RX" -P timing:data="CAN RX" -I csv:header=true:samplerate=5000000 -i "T:\stdHMF\UserData\scripts\Tektronix2PulseView\_PulseView_AllChannels_ACQ000001_Tektronix_f5000000.txt"

2017-04

Using PulseView to decode data from a Tektronix oscilloscope of SPI communication to a CAN controller, MCP2515.

Interests

I am mostly interested in:

Protocol decoders

Non-empty wiki pages

Currently (2017-07-08), 28 of 77 protocol decoders (36%) have non-empty pages here on the wiki:

Profile

Profile: see my Wikipedia user page.

Credentials: more than 5000 edits on the English Wikipedia.

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