Date: Tue, 03 Feb 2015 07:23:14 +0100 From: Hans Petter Selasky <hps@selasky.org> To: james <kqiu.star@gmail.com>, freebsd-arm@freebsd.org Subject: Re: isochronous transfer porting Message-ID: <54D06952.8080402@selasky.org> In-Reply-To: <54D067BB.9070503@selasky.org> References: <54D066A0.1090602@gmail.com> <54D067BB.9070503@selasky.org>
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On 02/03/15 07:16, Hans Petter Selasky wrote: > On 02/03/15 07:11, james wrote: >> HI >> I am recently doing a project that needs support usb camera in RTEMS. >> The platform is based on ARMv7, otg controller is EHCI compatible >> >> I am considering porting isochronous transfer in FreeBSD to RTEMS, >> but not familiar with FreeBSD code yet, and I found that >> Sebastian Huber has ported FreeBSD USB stack to RTEMS, but only support >> MMC and usb mass storage now(I have supported usb mass storage host in >> RTEMS). >> >> do you have any suggestions on this project? If porting from FreeBSD, >> which point should >> I start with?Does anyone have done this work before? >> Thanks in advance > > Hi, > > You should probably update the USB code from FreeBSD 11-current. If mass > storage is working isochronous transfers should work too. It should work > more or less the same like before. > > --HPS > You don't need to port mass storage from uboot. See "usb_msctest.c" in FreeBSD for a very simple interface. --HPS
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