umm With serial download，I prefer to set the baudrate up to 921600 , if you use a usb converter to uart .
2014/1/9 Vaibhav Bedia <[email protected]> > On Wed, Jan 8, 2014 at 2:31 PM, William Hermans <[email protected]> wrote: > >> Any information you're willing to share as to how you load files via >> serial would be awesome. Personally, I love reading about this sort of >> thing . .. >> >> > The steps are outlined here... > > http://processors.wiki.ti.com/index.php/AM335x_U-Boot_User's_Guide > It's for the AM335x EVM but it should be easy enough to adapt it to any > AM335x system. > > > >> On Wed, Jan 8, 2014 at 11:22 AM, <[email protected]> wrote: >> >>> Thanks, and I'd seen that article, but you're right--I'm doing something >>> different. I have a BBB-based development board, and I'm writing a script >>> that loads a full distribution onto it starting from a blank slate--i.e., >>> nothing in the eMMC, no SD card. Most of it is working. >>> >>> I think Jack is right--it's a network driver issue. When I revert to the >>> stock u-boot v2013.10, the tftp works better. >>> >>> On Wednesday, January 8, 2014 9:59:29 AM UTC-8, William Hermans wrote: >>>> >>>> http://www.embeddedhobbyist.com/debian-tips/beaglebone- >>>> black/beaglebone-black-network-boot/ >>>> >>>> The above link is an article I wrote in the subject of network booting. >>>> uboot, MLO, and uEnv.txt are on an SD card, but the kernel, and device tree >>>> overlay is pulled in via TFTP, finally rootfs over NFS. >>>> >>>> This works fine, and might be a little slow, but nothing like what >>>> you're explaining in your post. I am just using the standard package that >>>> comes with Debian wheezy stable, and I have never experienced these >>>> problems you're mentioning here. >>>> >>>> >>>> >>>> >>>> On Wed, Jan 8, 2014 at 9:51 AM, Jack Mitchell <[email protected] >>>> > wrote: >>>> >>>>> On 08/01/14 16:47, [email protected] wrote: >>>>> > I have a setup that loads u-boot onto the BBB over the serial port, >>>>> and >>>>> > then tells u-boot to load the .dtb and kernel from a local TFTP >>>>> server. >>>>> > Loading the small .dtb file works perfectly (although slowly), and >>>>> > succeeds. Loading the kernel takes too long, causes lots of retries, >>>>> and >>>>> > finally errors out. If I manually get the kernel from that same TFTP >>>>> > server onto my laptop, it loads in about 11 seconds--over wifi--so >>>>> the >>>>> > server is working fine. It's just u-boot's TFTP client that seems to >>>>> be >>>>> > causing the errors. I have seen other messages around the net >>>>> advising >>>>> > changing the server's block size to 1468, which I did, and telling >>>>> > u-boot to turn dcache off, which isn't an option anymore, but it >>>>> still >>>>> > fails. >>>>> > >>>>> > Has anyone actually got this working? Which tftp server are you >>>>> using, >>>>> > and what parameters? Is there a patch to u-boot that might fix its >>>>> client? >>>>> > >>>>> > -- >>>>> > For more options, visit http://beagleboard.org/discuss >>>>> > --- >>>>> > You received this message because you are subscribed to the Google >>>>> > Groups "BeagleBoard" group. >>>>> > To unsubscribe from this group and stop receiving emails from it, >>>>> send >>>>> > an email to [email protected]. >>>>> > For more options, visit https://groups.google.com/groups/opt_out. >>>>> >>>>> Which version of u-boot are you using? Could it not also be the >>>>> ethernet >>>>> drivers? I would try updating to the latest u-boot version and see if >>>>> you're still having issues. >>>>> >>>>> Cheers, >>>>> >>>>> -- >>>>> Jack Mitchell ([email protected]) >>>>> Embedded Systems Engineer >>>>> Cambridgeshire, UK >>>>> http://www.embed.me.uk >>>>> -- >>>>> >>>>> -- >>>>> For more options, visit http://beagleboard.org/discuss >>>>> --- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "BeagleBoard" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to [email protected]. >>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>> >>>> >>>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "BeagleBoard" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/groups/opt_out. >> > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
