On 25.11.2022 00:25:03, Yasushi SHOJI wrote: > Microchip USB Analyzer can activate the internal termination resistors > by setting the "termination" option ON, or OFF to to deactivate them. > As I've observed, both with my oscilloscope and captured USB packets > below, you must send "0" to turn it ON, and "1" to turn it OFF. > > From the schematics in the user's guide, I can confirm that you must > drive the CAN_RES signal LOW "0" to activate the resistors. > > Reverse the argument value of usb_msg.termination to fix this. > > These are the two commands sequence, ON then OFF. > > > No. Time Source Destination Protocol Length Info > > 1 0.000000 host 1.3.1 USB 46 URB_BULK out > > > > Frame 1: 46 bytes on wire (368 bits), 46 bytes captured (368 bits) > > USB URB > > Leftover Capture Data: a80000000000000000000000000000000000a8 > > > > No. Time Source Destination Protocol Length Info > > 2 4.372547 host 1.3.1 USB 46 URB_BULK out > > > > Frame 2: 46 bytes on wire (368 bits), 46 bytes captured (368 bits) > > USB URB > > Leftover Capture Data: a80100000000000000000000000000000000a9 > > Signed-off-by: Yasushi SHOJI <yashi@xxxxxxxxxxxxxxx> Applied to linux-can. Thanks, Marc -- Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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