2008-07-17 23:10:32 more than one codecs?
Leslie Li (CHINA)
Message: 59047
Hi,
I have two problems here:
1. I'm running uclinux on CoreA and codecs on CoreB, but since CoreB has no OS, how can I run multi-codecs on CoreB? only one-by-one mode?
2. How does CoreA and CoreB cooperate with each other? espacially when coreB's code job done, how can it remind coreA?
many thanks
TranslateQuoteReplyEditDelete
2008-07-17 23:27:29 Re: more than one codecs?
Mike Frysinger (UNITED STATES)
Message: 59048
it's up to you to manage Core B. i dont know what you mean by "codec", but i'm guessing you want to load different ELFs at runtime. you'll have to design a system where Core B informs Core A to load another ELF before Core B can continue executing.
there is no software to assist in this setup. you can design your own message passing algorithm (via some shared memory region) or interrupt signaling (via the SYSCR MMR).
you can see this page for more information:
http://docs.blackfin.uclinux.org/doku.php?id=load_application_running_in_bf561_core_b
QuoteReplyEditDelete
2008-07-18 00:51:41 Re: more than one codecs?
Leslie Li (CHINA)
Message: 59049
Hi Mike,
thanks for your help, it's helpful!
that multi-codec means load several elf binaries to coreb, and just like multi-task mechanism, there is a sheduler managing these elf binaries.
how to achieve this? should I port another tiny OS to coreB to manage codecs on it?
is there a convenient way?
TranslateQuoteReplyEditDelete
2008-07-18 01:47:52 Re: more than one codecs?
Mike Frysinger (UNITED STATES)
Message: 59051
there is no software provided to do this for you. you'd have to write the pieces.
in theory you could run another operating system on core b, but that is generally discouraged as most people are not familiar with all the guts of operating systems to know what can and cannot be done. most operating systems assume they are the only OS running and so they use all the resources.
QuoteReplyEditDelete
2008-07-20 23:11:00 回复： Re: more than one codecs?
Leslie Li (CHINA)
Message: 59152
Ok, I got it, thanks Mike.