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m8ta
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| {584} | ||
images/584_1.pdf -- this is a highly useful paper, but is no longer available on the author's website. For the good of all, i post it here. These may also have utility:
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| {583} | ||
From this and the USB 2.0 spec, I made this quick and totally uncomprehensive key for understanding the output of commands like
sudo cat /sys/kernel/debug/usbmon/4u 
To be used with the tables from the (free) USB 2.0 spec: 
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| {582} | ||
| Bjork has a special place in my heart - and not only because of stuff like this: http://www.youtube.com/watch?v=jX9y6AA5oOo ;) When I was in college - not so far back as Post, but before Selmasongs - we used to play a lot of pool. Not so much that we didn't get any work done, but enough that we started getting good. Near the end of that year we filmed a bunch of games & made a music video set to Underworld's remix of "Human Behavior". I don't know what happened to the actual end product, but I do clearly recall my mom complaining about the repetitive beats while I was cutting the shots so the ball collisions would align with snare/bass hits. Sometime later that year I was blown away by the real deal, the "All is full of love" music video, projected on the side of the art museum at ~ 2am when the mind is labile... Bjork & her music pervaded that period for me. I've found that music can 'tag' periods of life for me, such that when I remember the music first then the events. This winter it was Interpol, last fall was Metric, spring 2007 was Arca (you *have* to hear them!). When me and my brother went to Portugal for a few weeks we found two Pixies mix tapes in the tiny car that my friend generously let us use. Hence, Frank Black soaked our ears while the incredible Portuguese sun soaked our skin. | ||
| {581} | ||
brilliant!! source: android winners
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| {580} | ||
Notes from installing Ocaml via GODI on a Debian Lenny system (oh, dependencies!):
Final list: apt-get install libpcre3-dev libatlas-sse2-dev liblapack-dev libglut3-dev libxmu-dev libgtk2.0-dev libgtkgl2.0-dev | ||
| {579} | ||
oldies but goodies:
Both are in Debian of course :) | ||
| {502} | ||
Outline: The goal is to use a nRF24L01 to make an asymmetrical, bidirectional link. The outgoing bandwidth should be maximized, ~1.5mbps, and the incoming bandwidth can be much smaller, ~17kbps, though on both channels we want guaranteed latency, < 4ms for the outgoing data, and < 10ms for the incoming data. Furthermore, the processor that is being used to run this, a blackfin BF532, does not seem to play well when both SPI DMA is enabled and most CPU time is being spent in SPORT ISR reading samples & processing them. Fortunately, the SPI port and SPORT can be run synchronously (provided the SPI port is clocked fast enough), allowing the processor to run one 'thread' e.g. no interrupts. It seem that with high-priority interrupts, the DMA engine is not able to service the SPI perfectly, and without DMA, data comes out of the SPI in drips and drabs, and cannot keep the radio's fifo full. Hence, must program a synchronous radio controller, where states are stored in variables and not in the program counter (PC register, saved upon interrupt, etc). As in other postings on the nRF24L01, the plan is to keep the transmit fifo full for most of the 4ms allowed by the free-running pll, then transition back into either standby-I mode, or send a status packet. The status packet is always acknowledged by the primary receiver with a command packet, and this allows both synchronization and incoming bandwidth. Therefore, there are 4 classes of transfers:
screenshot of the derived code working (yea, my USB logic analyzer only runs on windows..yeck): 
old versions:   | ||
| {577} | ||
I found this on my computer tucked away into a dusty corner. Such fascinating information should not be left hidden -
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| {511} | ||
simple backups to an external usb disk:
rsync --verbose --progress --stats --recursive --times --perms --links --del --ignore-errors /home/tlh24/ /media/usb0/note:
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