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On Oct 8, 2015, at 2:32 PM, Gerald Coley <ger...@beagleboard.org> wrote:You run the risk of blowing the processor if the turn off sequence was not per the datasheet.
>> 3. All BeagleBones have a mismanaged external regulator for the >> "3v3exp" (BBW) / "3v3b" (BBB) rail, which remains enabled longer than >> the AM335x's 3.3V supplies ("3v3a").
There should not be any smps/ldo active at all after on-to-off transition is complete.
Further, comparing to bbb or am437x and x15 is not correct. They are very different system power architectures. Rtc offmode which am33x or am437x is capable of is not a target on x15 arch. So, PMIC on x15 does automatic "shut all off" sequence in the right prescribed order. This is not possible on am33x or am43x due to various levels of "off" and software optimization is done.
I am all interested in seeing if anything new can be done though.. Just highlighting that expectations should be tempered based on architecture.
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Regards,
Nishanth Menon
-*From MotoG*-
On Oct 8, 2015, at 2:44 PM, Gerald Coley <ger...@beagleboard.org> wrote:Only way to do that is to shut off the 3.3VA regulator.
Only way to do that is to shut off the 3.3VA regulator.
With the TI kernel, I noticed that the power LED was also off, which is what I see when I hold the power button down for 10 seconds.
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Actually, we have a FET controlled by the PMIC to turn on the 3.3V It is called power sequencing, something you don't need in an Arduino.
On the BBB the external 3.3V is the same rail as the 3.3V power output of the PMIC.
The power on the PMIC was insufficient, so I added more power capacity with an external LDO. .
We had to change the PMIC outputs on BBB to support the DDR3 configuration. AlI I had to work with was the TPS65217. There we some challenges there.
The 3.3V supply on the X15 is a 4A supply, and only one. It is enabled by an output of th ePMIC, so we have no dual supply scenario there.
X15 is not a BBB. Not even close.The power challenges are a whole lot different, like a dedicated 3.0A just for the three USB3 ports.
On Aug 31, 2015, at 8:36 AM, Jason Kridner <jkri...@gmail.com> wrote:I should be getting a *tiny* number of beta X15 boards on Wednesday. I'd like to minimize the turn-around from arrival with me to boards in key developer hands, I'd like for people anxious for boards to reply to this list with:1) What your plans for the boards would be.
I will be sending Robert Nelson patches for his V4.1.6-bone15 Kernel.2) What open source repositories (URLs please) will host your contributions.
3) What expertise you have to accomplish your goals.
If there is someone you don't see replying to this list that you feel should be getting a board (like a kernel maintainer that doesn't read this particular list) then don't hesitate to put them in direct CC and make the case for them. There are a couple people I'll do that for myself if I don't see them show up on this thread.If I like your proposal, you will get a private e-mail from me with a URL to a Google spreadsheet where I'd like you to update me on your latest shipping address and phone number. There's also some info in there to help us record this as a donation to help assist the goals of the non-profit foundation, so I appreciate your help in that regard.Please don't be hurt if you don't get a board in this round. There just aren't many to go around.
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1) What your plans for the boards would be.
2) What open source repositories (URLs please) will host your contributions.
3) What expertise you have to accomplish your goals.
I should be getting a *tiny* number of beta X15 boards on Wednesday. I'd like to minimize the turn-around from arrival with me to boards in key developer hands, I'd like for people anxious for boards to reply to this list with:
1) What your plans for the boards would be.
2) What open source repositories (URLs please) will host your contributions.
3) What expertise you have to accomplish your goals.
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I should be getting a *tiny* number of beta X15 boards on Wednesday. I'd like to minimize the turn-around from arrival with me to boards in key developer hands, I'd like for people anxious for boards to reply to this list with:1) What your plans for the boards would be.
2) What open source repositories (URLs please) will host your contributions.
3) What expertise you have to accomplish your goals.
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I should be getting a *tiny* number of beta X15 boards on Wednesday. I'd like to minimize the turn-around from arrival with me to boards in key developer hands, I'd like for people anxious for boards to reply to this list with:1) What your plans for the boards would be.
2) What open source repositories (URLs please) will host your contributions.
3) What expertise you have to accomplish your goals.
1) What your plans for the boards would be.
2) What open source repositories (URLs please) will host your contributions.
3) What expertise you have to accomplish your goals.
Thanks & Best Regards,
Stephen
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c) Checking on OpenOCD status, if the JTAG header is shipped populated.
I remember seeing some TI patch activity, but no ti_beagleboard-x15.cfg
or am5*.cfg got merged yet.
f) Cortex-M4 - investigating a nommu Linux port. Requires the M4 to have
access to SDRAM - not quite clear from the TRM block diagram...
Am 21.10.2015 um 20:01 schrieb bal...@gmail.com:
> What openocd really, desperately needs is more people; both users and coders.
> The project is really small and the guys who are actually active in it don't
> even have access to any cortex-a targets, that makes things a little difficult
> for us, cortex-a users.
I would've worded it "reviewers". :) There's around a dozen ARMv7-A
patches waiting for review on the Gerrit site I gave the URL of.
Personally I don't feel qualified to review all of them, but if we
peer-review and +1 any Beagleboard-related configs or bug fixes we can
actually test, they should have a fairly good chance of getting accepted
sometime.
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Just curious, did TI bother to correctly program the CoreSight ROMs this time, or is it still leaving them blank (main DAP) or with wrong content (IPU) ?
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I should be getting a *tiny* number of beta X15 boards on Wednesday. I'd like to minimize the turn-around from arrival with me to boards in key developer hands, I'd like for people anxious for boards to reply to this list with:
1) What your plans for the boards would be.
2) What open source repositories (URLs please) will host your contributions.
3) What expertise you have to accomplish your goals.
I should be getting a *tiny* number of beta X15 boards on Wednesday. I'd like to minimize the turn-around from arrival with me to boards in key developer hands, I'd like for people anxious for boards to reply to this list with:1) What your plans for the boards would be.2) What open source repositories (URLs please) will host your contributions.3) What expertise you have to accomplish your goals.
<snip>
Please don't be hurt if you don't get a board in this round. There just aren't many to go around.