October 2009 - U-Boot

[U-Boot] default load addresses
by David Collier 26 Oct '09

26 Oct '09

the tftp command works with the default address set indirectly by CFG_LOAD_ADDR the ext2load command doesn't, and I don't know how to specify the default load address by ${defload} or anything similar. Is there an underlying reason why one command can use a default addr, and the other can't? David Collier www.dexdyne.com

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[U-Boot] setting u-boot params based on serial number
by David Collier 26 Oct '09

26 Oct '09

This may be bloody obvious to most of you, but I'm still learning. I have a batch of boards in production. say serial numbers 1 to 50 I want to set the 2 mac address, and the ip address so that the last few digits match the serial number. can I do this easily with some sort of u-boot script? Or can I run an app I write myself in C or whatever, and get it to do setenv commands? AVR32, if it matters TVM David Collier www.dexdyne.com

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[U-Boot] CAN console
by Matthias Weißer 26 Oct '09

26 Oct '09

Hi I have a device here which has only a CAN interface to the outside world. I am currently thinking about implementing a "serial" driver using the CAN controller. Is there any chance to get this accepted in the public u-boot tree? A special program on the PC side would be needed to translate the CAN messages back to a serial stream and vice versa and make it available to a terminal program. But thats another story. Regards, Matthias Weißer

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[U-Boot] last step to go - dead PHY
by David Collier 26 Oct '09

26 Oct '09

My apologies, I've posted this is AVR32_u-boot where it probably belongs. But I'm running out of time to ship some prototypes tomorrow, and this is my last major issue with them, so could I throw myself on the mercy of the assembled wisdom please? Maybe someone will say - you stupid person, you need to change this line to that.... We have built a new design based on the ATNGW100, but we were pushed for space, so we fitted the Nat Semi DP83849C dual PHY It works great under Linux, but Linux seems to do a probe for PHYs at multiple addresses on the MII busses. Yes, I know the very latest u-boot sources can do similar, but I had to freeze on 2008-10 because of the saveenv issue. Too late to update now. Anyway, only my 2nd PHY works under u-boot, and that's not the WAN interface for Linux ( as painted on the box ), so I can't use the same cable for both. Could anyone look at the problem report below and see if they can instantly tell me what to change, or what to examine Can I squeeze any more progress info out of u-boot ? Truly grateful. David Collier www.dexdyne.com ============= question ================== Both Ethernets work under Linux.. so it can't be too serious. the linux startup says: eth0: attached PHY driver [Generic PHY] (mii_bus:phy_addr=0:10, irq=-1) eth1: attached PHY driver [Generic PHY] (mii_bus:phy_addr=1:00, irq=-1) now we have strapped PHYAD4 high, so the 2 phys should have addresses binary 10000 and 10001 I can't see any relationship between 0:10 and 1:00 and 10000 and 10001 !!! well maybe - the first one looks right - binary 10000 is hex 10 but the other port should be on hex 11, not hex 0!!!!!! --------------- but under u-boot in my file derived from ATNGW10.c I have void board_init_info(void) { gd->bd->bi_phy_id[0] = 0x01; gd->bd->bi_phy_id[1] = 0x03; } I THINK the first line refers to the PHY that doesn't work, and the 2nd to the one that does, but I'm aware of the possibility of a cross-over but changing either/both those values seems to make no difference to what happens.... I still get MACB0 "no PHY" and MACB1 connects...

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[U-Boot] user input
by David Collier 26 Oct '09

26 Oct '09

I have a script environment variable called set_mac_IP which requires me to do "setenv sn 1234" ( or whatever ) before I run it. The script is always run from the console. Is there a simple way to do ask sn; ..... and ask for a number to be input on the console? I was wondering if hush could manage this in some way... but my head hurts If this is an RTFM, I'm sorry, I've read most of it and not noticed this one ! David Collier www.dexdyne.com

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Re: [U-Boot] [PATCH] add u-boot sja1000/can support
by Mike Frysinger 26 Oct '09

26 Oct '09

On Monday 26 October 2009 04:30:10 miaofng wrote: > Hi mike, please do not top post > It seems there's a big difference between my current project > and u-boot common usage. I can only enjoy the patch myself now > > i want to get a packet from usb/network, then redirect it to can bus. > So blocked write/read of can is not allowed. what's wrong with receiving data over usb/network into external memory, then transferring it over CAN ? this is typically how things are done -- load an file over the network and once it is complete, operate on it (write it to flash, boot it, whatever). -mike

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[U-Boot] why there is no code boot from nand flash?
by Jello huang 26 Oct '09

26 Oct '09

Dear list, why is there no code boot from nand flash and nor flash in / cpu / arm920t / start.S? I am puzzle. anybody can show me some reason? Thanks a lot! -- JUST DO IT,NOTHING IS IMPOSSIBLE

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[U-Boot] stopping u-boot from booting an old image in RAM.
by David Collier 26 Oct '09

26 Oct '09

If I boot this unit, then remove the SD card it booted from and reset it, it happily boots some Linux image which is lying around in memory. It even does it after a short power-off power-on sequence. I think that's horrible behaviour. I was told I could use && instead of ; between the commands in the bootcmd string to stop this, but that barfed, and then I was told that maybe && only existed if "scripting is enabled" Could anyone please talk me through the steps of either 1. doing what it takes to enable this && feature, so that if it fails to find the card, it doesn't go on and try to boot. or 2. something else that will do it, such as so effectively buggering up an image that has been booted from that it will never be re-used :-) TVM David Collier www.dexdyne.com

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[U-Boot] DHCP command
by David Collier 26 Oct '09

26 Oct '09

I'm very confused by this isn't it more reasonable to separate the getting of an ip address for our interface from the downloading of an image by TFTP? after all one can always go hp;TFTP or DHCP && TFTP just puzzled.... maybe I'm looking for a separate command that just gets an address... call it dodhcp or dhcpget or summat? David Collier www.dexdyne.com

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[U-Boot] macro substitution - can someone explain please
by David Collier 26 Oct '09

26 Oct '09

If I put the following line in my board.h file #define CONFIG_RAMBOOTCOMMAND \ "ping ${serverip} && tftp && bootm ${fileaddr}" then when I do PRINTENV I see ramboot=ping ${serverip} && tftp && bootm 0x10400000 so clearly at some point the text ${fileaddr} has been substituted, whereas ${serverip} hasn't If I retype the line at the command prompt, the ${fileaddr} appears as I wished, so it must be happening diring compile and so on. Can anyone explain, and/or can anyone tell me how to get the effect I wanted. David Collier www.dexdyne.com

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