Date: Mon, 11 Apr 2022 15:59:10 +0200 From: Hans Petter Selasky <hps@selasky.org> To: Archimedes Gaviola <archimedes.gaviola@gmail.com> Cc: freebsd-arm@freebsd.org Subject: Re: Raspberry Pi 3B Over-current USB Message-ID: <8dc68431-ad3d-84db-45b4-cd661d4a15df@selasky.org> In-Reply-To: <CAJFbk7Hv7BHDqmg6tFaGwgFvt6%2B2%2Bu0nkCBPrqvGiNN--Y63zQ@mail.gmail.com> References: <CAJFbk7FgSnWvN9Z7gp1wqW1CFa8bYqrr6zccMWEhotk5HMR=Tg@mail.gmail.com> <5deaf68b-267c-56dd-603d-8ec0d82ceae2@selasky.org> <CAJFbk7Hv7BHDqmg6tFaGwgFvt6%2B2%2Bu0nkCBPrqvGiNN--Y63zQ@mail.gmail.com>
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On 4/11/22 15:59, Archimedes Gaviola wrote: > Hi Hans, > > Noted on the self-powered hub, thanks for the suggestion, I will try. > > Just wanted to share the observation from the testing I've conducted with > my Raspberry Pi 4B with the same 14.0-CURRENT to check if overcurrent is > also experienced and it did, there was overcurrent and each ports' power > shut-off during the situation but it was able to recover back. I initiated > the command 'usbconfig reset' and each port gloriously came back alive one > by one and loaded my USB keyboard and Prolific uplcom(4) drivers into > functional and operational states. My measuring device is showing the same > amount of current 460mA while the voltage stayed at 5.05 from a baseline of > 5.15 voltshttps://filebin.net/10vy575q6h2yl8og. Unlike my RPi 3B, voltage > dropped to 4.93 from a baseline of 5.19 volts. So, the difference I > observed is when the voltage dropped below 5, the system will not give a > chance to make the ports come back alive as a sort of protection mechanism. > Sharing to you the logs below (with hw.usb.uhub.debug=1). FreeBSD does not actively check and use "bMaxPower" . --HPS
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