Hi, all -I've decided to self-tutor in the area of embedded Linux. (I have embedded experience, and some Linux experience, but not together). I was thinking of getting a beaglebone for experimentation. I can't be more specific, because I don't know what I want to yet, other than learn some new skills.I have a few questions, if you please:1. is the beaglebone platform a reasonable choice?
2. is there a particular model I should favor?
3. in the old days, we needed special devices (like flashers) for downloading programs. Do I need anything like this to use the board?
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The Beaglebone is a better choice than say, Raspberry Pi, since Linux is somewhat locked-down on the R Pi, which puts limits what you can do with it.
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Hi William:For an expert, you are totally correct.
For a newbie, the Raspberry Pi images seem to be designed to limit how much tinkering you can do with Linux itself.
The tools and examples for modifying Linux itself are much better supported on the Beaglebone.
Both are good for blinking LEDs and simple embedded programming experiments.
Dont treat this as an rPI endorsement however. I much prefer the beaglebone in most cases, but the rPI, specifically the rPI's has many good points too.
Thanks for the detailed answers. Do I really need to use an SD card for transferring the kernel to the beaglebone? Seems kind of cumbersome, so if there's another way to do it, I'd appreciate hearing about it.
Thanks for the detailed answers. Do I really need to use an SD card for transferring the kernel to the beaglebone? Seems kind of cumbersome, so if there's another way to do it, I'd appreciate hearing about it.mz
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If one needs significant number crunching capability, the RPI-3 would
be the choice -- even with the 64-bit A53 quad-core crippled by using a
32-bit variant of Debian, compared to the 32-bit single-core BBB.* The
RPI-3 also has on board WiFi#
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You just need make ABSOLUTELY SURE the serial side is 3v3 logic. Or you risk damaging the beaglebone's processor.Not only that but if you make a mistake, and render the eMMC unbootable. How would you fix it without an sdcard ? Short answer is that you can't. But with an sdcard, you'd insert the "emergency" card, revert the changes you made, then power cycle the board ater removing the sdcard. viola! problem solved.I would also highly recommend getting a 3v3 ttl USB serial cable. They don't have to be the FTDI $20 cabled. One like this: http://www.ebay.com/itm/like/231721779803?lpid=82&chn=ps&ul_noapp=true would work. Think we picked up 2 off ebay for less than $5 including shipping.
On Thu, Sep 29, 2016 at 5:02 PM, Dennis Lee Bieber <wlf...@ix.netcom.com> wrote:
On Thu, 29 Sep 2016 15:10:28 -0700 (PDT), mzimmers
<mzim...@gmail.com> declaimed the following:
>Thanks for the detailed answers. Do I really need to use an SD card for
>transferring the kernel to the beaglebone? Seems kind of cumbersome, so if
>there's another way to do it, I'd appreciate hearing about it.
>
Typically one generates a complete OS system on the SD card, and
configure it to flash the entire eMMC with the entire OS.
If you can configure kernel images in a form that apt can handle, sftp
to the eMMC followed by apt on the image file might be a viable option.
I've not done anything like that (I've stayed with prebuilt OS images).
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Wulfraed Dennis Lee Bieber AF6VN
wlf...@ix.netcom.com HTTP://wlfraed.home.netcom.com/
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. . .and the chances you'll need a cross compiler toolchain, and IDE are near nil.