From: Ratmansky, R. <ric...@lm...> - 2012-08-08 18:29:46
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Hi everyone, I'm using a gumstix overo fire to stream jpegs over wifi. I have everything working, but would like to use the dsp for the jpeg compression (my usb camera gives me raw frames). I was able to compile dsplink just fine, and have the modules loading without problem on my gumstix. The problem is that any time I try to run the dsp-link examples, it errors out. I think my problem has to do with memory mappings, but I'm not sure. What do I have to change in u-boot/other files to setup the memory properly? Also, does anyone know of a good, step by step, tutorial for getting some example DSP code running? Thanks a lot, Rick |
From: acsmith <ac...@st...> - 2012-08-08 18:37:25
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Hi Rick, Best single source that I've seen that discusses setting up an image and getting the DSP mappings correct is Scott's page at http://jumpnowtek.com/index.php?option=com_content&view=article&id=81:gumstix-dsp-gstreamer&catid=35:gumstix&Itemid=67 Jumpnowtek . I've used this code and can confirm everything works. I'm also doing some streaming stuff, I'm using gstreamer and compressing it to H264. How are you trying to stream the jpegs? I've run into latency images, maybe streaming jpegs is a better solution, just curious what your code looks like. Thanks, Andrew -- View this message in context: http://gumstix.8.n6.nabble.com/Overo-Fire-DSP-for-jpeg-compression-tp4965080p4965081.html Sent from the Gumstix mailing list archive at Nabble.com. |
From: kris d. <t_...@ya...> - 2012-08-09 15:12:19
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Hello, I'm looking to do my own daughterboard for the overo com. On the the chestnut, the gumstix team uses the ethernet lan chip LAN9221. I have found that the LAN9512 (the one used by rasp. pi) is cheaper and gives 2 usb ports. Is it possible, easily, to use the LAN9512 with the gumstix ? I don't undestand yet the difference between the chips... Thank! Kris |
From: Ash C. <as...@gu...> - 2012-08-09 16:14:42
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On Thu, Aug 9, 2012 at 8:11 AM, kris duff <t_...@ya...> wrote: > I'm looking to do my own daughterboard for the overo com. On the the > chestnut, the gumstix team uses the ethernet lan chip LAN9221. I have found > that the LAN9512 (the one used by rasp. pi) is cheaper and gives 2 usb > ports. Is it possible, easily, to use the LAN9512 with the gumstix ? Definitely. In fact, Beagleboard uses this chip (or maybe it is the LAN9514 version) and you could definitely hang it off one of the USB ports from the COM on a custom expansion board. > > I don't undestand yet the difference between the chips.. The LAN9221 is somewhat unique in that the GPMC (general purpose memory controller, i.e. it acts like a memory device) rather than an upstream USB bus provides the connection to the processor. The ethernet from the LAN9521x series is basically like using one of those USB to ethernet dongles. It has the disadvantage of ethernet connectivity breaking if there is a problem with USB but is simpler to use and gives you the extra USB ports for less money. As with everything, it is a tradeoff! -Ash |
From: kris d. <t_...@ya...> - 2012-08-10 13:14:28
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Thank you a lot for your help, I appreciate! Kris ________________________________ From: Ash Charles <as...@gu...> To: kris duff <t_...@ya...>; General mailing list for gumstix users. <gum...@li...> Sent: Thursday, August 9, 2012 12:14:02 PM Subject: Re: [Gumstix-users] lan9221 vs lan9512 On Thu, Aug 9, 2012 at 8:11 AM, kris duff <t_...@ya...> wrote: > I'm looking to do my own daughterboard for the overo com. On the the > chestnut, the gumstix team uses the ethernet lan chip LAN9221. I have found > that the LAN9512 (the one used by rasp. pi) is cheaper and gives 2 usb > ports. Is it possible, easily, to use the LAN9512 with the gumstix ? Definitely. In fact, Beagleboard uses this chip (or maybe it is the LAN9514 version) and you could definitely hang it off one of the USB ports from the COM on a custom expansion board. > > I don't undestand yet the difference between the chips.. The LAN9221 is somewhat unique in that the GPMC (general purpose memory controller, i.e. it acts like a memory device) rather than an upstream USB bus provides the connection to the processor. The ethernet from the LAN9521x series is basically like using one of those USB to ethernet dongles. It has the disadvantage of ethernet connectivity breaking if there is a problem with USB but is simpler to use and gives you the extra USB ports for less money. As with everything, it is a tradeoff! -Ash |