Sorry , I have made a mistake . On omap3 board ,you should use pserial to download from serial And on am335x / dm8148 board. x-modem is enough.and MLO is for boot from serial
So , please try to use teraterm , and upload from file->transfer->xmodem->send. Then power on the beaglebone board . 2014-07-21 16:17 GMT+08:00 liyaoshi <liyao...@gmail.com>: > If I remember correctly , You should load x-loader.bin NOT MLO > While the different between MLO and x-loader.bin is MLO has 8 bytes head , > the first 4 bytes is dest and the second 4 bytes is length . > This is for boot from NAND /eMMC , and when download from serial . the > boot rom will download to fixed address and limit length . > > > > 2014-07-21 12:04 GMT+08:00 John Syn <john3...@gmail.com>: > > >> From: Dallas Clement <dallas.a.clem...@gmail.com> >> Reply-To: "beagleboard@googlegroups.com" <beagleboard@googlegroups.com> >> Date: Sunday, July 20, 2014 at 9:19 AM >> To: "beagleboard@googlegroups.com" <beagleboard@googlegroups.com> >> Subject: Re: [beagleboard] Want to serial boot my BBB >> >> One other data point. If I don't press and hold the boot switch when >> power is applied and instead wait a few seconds after applying power and >> then press the boot switch, the pserial command is able to detect the ASIC >> ID and download the x-loan.bin. >> >> You should be loading MLO, not x-load.bin. I also haven’t tried this >> myself, but loading via serial shouldn’t be any different from loading from >> tftp. The load addresses should be identical. >> >> Regards, >> John >> >> >> $ sudo ./pserial -p /dev/ttyUSB0 -f x-load.bin >> Waiting For Device ASIC ID: Press Ctrl+C to stop >> ASIC ID Detected: 0x85 0x74 0x61 0x90 >> Sending 2ndFile: >> Downloading file: 100.000% completed (10516/10516 bytes) >> File download completed. >> >> However, the BBB boots from the eMMC instead of the x-loan.bin I >> downloaded. So this is progress. It means that my pserial command does >> work with a BBB and the BBB ROM code does respond with its ASIC ID and does >> in fact download the x-load.bin. It looks like I just need to figure out >> what the correct boot switch power on sequence is now. >> >> On Sunday, July 20, 2014 10:36:45 AM UTC-5, Dallas Clement wrote: >>> >>> Hi William. Thanks for the help. I'm stuck much earlier on than >>> u-boot. I am expecting the ROM to return the ASIC ID when I run the >>> pserial command to try and load the first stage boot loader (x-load.bin). >>> I'm not even able to get past that. It looks like either I have the wrong >>> pserial command or maybe the BBB ROM does not provide an ASIC ID. I don't >>> know enough about the Sitara processor to say. If I can get the x-loader >>> to work, I think I am home free because it should be able to load a >>> u-boot.bin. >>> >>> On Sunday, July 20, 2014 10:18:50 AM UTC-5, William Hermans wrote: >>>> >>>> Ok after reading the second link fully, I noticed a few things. >>>> >>>> First, the boot file is different. We have zImage typically, so I would >>>> assume the bootz command would be necessary. *OR* you could convert a >>>> zImage to uImage. >>>> >>>> Secondly, the base load address is different, so this would need to be >>>> taken into account. Although I think changing this would be fairly simple. >>>> >>>> Lastly, we also need to load the device tree board file, and I am a bit >>>> confused about this for loading serially. >>>> >>>> >>>> >>>> >>>> On Sun, Jul 20, 2014 at 7:59 AM, William Hermans <yyr...@gmail.com> >>>> wrote: >>>> >>>>> uboot is supposed to handle serial booting. However, I have no >>>>> personal hands on. Just a quick google search showed many results however. >>>>> One thing to note is that uboot for the BBB is patched, so possibly >>>>> different. It does not however make sense for this feature to be patched >>>>> out, so I would assume that it should work. >>>>> >>>>> Sorry for the less than definitive answer, perhaps someone with hands >>>>> on will respond. You can however experiment on your own. >>>>> >>>>> http://blackfin.uclinux.org/doku.php?id=bootloaders:u- >>>>> boot:serial_port_loading_files >>>>> http://blog.mezeske.com/?p=483 >>>>> >>>>> $ apt-cache search ckermit >>>>> ckermit - serial and network communications package >>>>> >>>>> Second link package mentioned is available, so looks to be possible. >>>>> >>>>> >>>>> On Sun, Jul 20, 2014 at 7:44 AM, Dallas Clement <dallas.a...@gmail.com >>>>> > wrote: >>>>> >>>>>> Hi, >>>>>> >>>>>> I am trying to boot my BBB over a serial connection, and need a >>>>>> little help. I have followed the instructions for UART recovery listed >>>>>> here http://elinux.org/BeagleBoardRecovery >>>>>> >>>>>> I built the pserial tool and an x-loan.bin, but when I try to load >>>>>> it, I just getting hanging. >>>>>> >>>>>> $ sudo ./pserial -p /dev/ttyUSB0 -f x-load.bin >>>>>> Waiting For Device ASIC ID: Press Ctrl+C to stop >>>>>> >>>>>> I am using a 6 pin TTL to USB cable to my PC. >>>>>> >>>>>> Perhaps the x-load.bin I am using is for the wrong processor >>>>>> (BeagleBoard)? If so, maybe I can convert the MLO produced by the BBB >>>>>> u-boot build to a x-load.bin. Just need a few pointers on how to do >>>>>> that. >>>>>> >>>>>> Thanks, >>>>>> >>>>>> Dallas >>>>>> >>>>>> >>>>>> -- >>>>>> 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 beagleboard...@googlegroups.com. >>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>> >>>>> >>>>> >>>> -- >> 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 beagleboard+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> >> -- >> 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 beagleboard+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > > -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
