sorry - my fault - I failed to grasp the meaning of itest This now works
while itest 1 == 1 ; do ; mmcinit && ext2load mmc 0:1 0x10400000 /boot/uImage && bootm 0x10400000 ; done I could do with a literal "true" - I tried 'true' but that wasn't right - is there a suitable constant value? I'd still love to find some teaching stuff on this - I can't keep bothering important people like you :-) David In article <memo.20091022142208.20...@postmaster+dexdyne.com.cix.co.uk>, from_denx_ub...@dexdyne.com (David Collier) wrote: > *From:* "David Collier" <from_denx_ub...@dexdyne.com> > *To:* u-boot@lists.denx.de > *Date:* Thu, 22 Oct 2009 14:22 +0100 (BST) > > OK I have changed it to > > while 1==1 ; do ; mmcinit && ext2load mmc 0:1 0x10400000 > /boot/uImage && > bootm 0x10400000 ; done > > and if I do run bootcmd it simply says "unknown command 1==1" > > so I'm still lost.... > > I know I have hush installed, cosz if I do your multi-line-version > I get > the prompt. > > ------------------------------------------------------------ > > All I saw about hush was "bourne-compatible", and "provides > while...do..done" scripting. > > I failed to find a proper manual... probably for lack of effort, > but I've > just googled again and nothing springs up.. > > Could you possibly point me at any hush documentation ? > > Many thanks > > David > > > In article <20091022113139.db6961a...@gemini.denx.de>, w...@denx.de > (Wolfgang Denk) wrote: > > > *From:* Wolfgang Denk <w...@denx.de> > > *To:* from_denx_ub...@dexdyne.com > > *CC:* u-boot@lists.denx.de > > *Date:* Thu, 22 Oct 2009 13:31:39 +0200 > > > > Dear "David Collier", > > > > In message > > <memo.20091022093854.20...@postmaster+dexdyne.com.cix.co.uk> you > > wrote: > > > > > > what I'd like to do is put it in a while loop - this is an > > > embedded > > > system and it has nothing better to do than to try again. > > > > > > but if I set up > > > > > > bootcmd=while [ .... ]; do ; mmcinit && ext2load mmc 0:1 > > > 0x10400000 > > > /boot/uImage && bootm 0x10400000 ; done > > > > > > no matter what I have put in or around the [..] area, it barfs. > > > > Did you understand why it barfs? The '[' is actually a command > > name, > > which usually is a synonym for the 'test' command. U-Boot does not > > provide such a coimmand, and the hush shell does not provide it as > > shell builtin either, so this _must_ fail. > > > > I am surprised that you did not find this out yourself - U-Boot > > should > > issue a pretty clear error message, something like > > > > Unknown command '[' - try 'help' > > > > > Could anyone show me a working example of a hush while loop > > > please? Or > > > tell me what I'm doing wrong :-) > > > > Here is a (tested and working) example: > > > > => mw 200000 0 > > => while itest *200000 == 0 ; do > > > tftp 200000 tqm5200/uImage > > > echo === done ==== > > > done > > Using FEC ETHERNET device > > TFTP from server 192.168.1.1; our IP address is 192.168.160.4 > > Filename 'tqm5200/uImage'. > > Load address: 0x200000 > > Loading: > > ################################################################# > > > > ############################################################ > > done > > Bytes transferred = 1830503 (1bee67 hex) > > === done ==== > > => > > > > Best regards, > > > > Wolfgang Denk > > > > -- > > DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev > > Zundel > > HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, > > Germany > > Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: > > w...@denx.de > > "Where shall I begin, please your Majesty?" he asked. "Begin at > > the > > beginning," the King said, gravely, "and go on till you come to > > the > > end: then stop." - Alice's Adventures in Wonderland, Lewis > > Carroll > > > > > Collier > > www.dexdyne.com > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de > http://lists.denx.de/mailman/listinfo/u-boot > Collier www.dexdyne.com _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
