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Missing documentation / open development questions

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tkaiser  
Edited by tkaiser at Tue Oct 6, 2015 02:44

Hi,

I just had a look into the PMU's manual (I found it here and not at Actions Semi's site http://moveontechnology.com/hugo ... t-V1.1-20120610.pdf -- this is revision 1.1 from 2012, is there a newer one available?).

1) If I understand correctly on the Guitar the incoming voltage from DC-IN is converted down to approx. 4.25V and then fed into the ATC2603 PMU? The voltage to supply USB peripherals is then created using DCDC4? If this is true does the 5V/800mA limitation applies to all three USB ports together? Or is there another power scheme implemented to supply up to 900mA on the USB3 port and up to 500mA at the two USB2 ports?

2) Where is the datasheet/manual for the S500 SoC?

3) Where is the u-boot source (you use currently 2015.04 -- why not a more recent version?)

4) Where is the kernel source (you use currently 3.10.37 -- maybe based on Linaro's LTS kernel back from early 2014, why not a more recent version?)

5) What about Linux mainline support?

6) Are these here really Actions Semi's developer resources? http://www.actduino.org/home/resource/ (no documentation at all, only dead links, registration disabled)

Thx,

Thomas

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Hi All,
I also have a same question with regard to Documentation and Kernel/UBoot/Linux/Android SDK sources for LeMaker Guitar.
Where we can find them?

If you are agree, we also need to know how we have to Implement our Linux Rootfs to .fw format which can be loaded to eMMC by ADFU tool.
They are all not clear yet...

Please share if you find any official/unofficial resources as the WIKI is not mature at this stage.

Thanks

I have the same question : my final goal is to install Gentoo on my guitar and, for that, I need technical information about the boot loader and the kernel parameters

Peter will answer your question later this evening.

hnsncxy  
Edited by hnsncxy at Thu Oct 8, 2015 03:17
I just had a look into the PMU's manual (I found it here and not at Actions Semi's site http://moveontechnology.com/hugo ... t-V1.1-20120610.pdf -- this is revision 1.1 from 2012, is there a newer one available?).

1) If I understand correctly on the Guitar the incoming voltage from DC-IN is converted down to approx. 4.25V and then fed into the ATC2603 PMU? The voltage to supply USB peripherals is then created using DCDC4? If this is true does the
Hi, Thomas
The ATC2603C use 4.28v input voltage and the USB peripherals is powered by the discrete DC-DC component. The two USB2.0 can provide 1.7A current in total, and the USB3.0 can provide 1.4A current.
You can download the datasheet of the S500 SOC at http://mirror.lemaker.org/Datasheet_For_S500_V1.4.pdf and datasheet of ATC2603C at http://mirror.lemaker.org/Datasheet_For_ATC2603C_V2.1.pdf
At present, we are developing and testing the SDK for the Guitar, and plan to release the SDK source code which include the uboot and kernel around the 20th.

Thanks for your questions

tkaiser  
hnsncxy replied at Thu Oct 8, 2015 02:58
Hi, Thomas
The ATC2603C use 4.28v input voltage and the USB peripherals is powered by the discrete D ...

Thx for the detailled answers. Regarding the power requirements of the USB ports the PSU recommendation (12V/2A) starts to make sense

Do the USB ports act like charging downstream ports (CDP) according to the USB Battery Charging Specification or is the power delivery proprietary?

hnsncxy  
Edited by hnsncxy at Thu Oct 8, 2015 03:18
sghazagh replied at Tue Oct 6, 2015 15:07
Hi All,
I also have a same question with regard to Documentation and Kernel/UBoot/Linux/Android SDK  ...

Hi, sghazagh
We have writen a tool to make the fw firmware which can be burned to the EMMC, we will release the tool to our Github in this week. However,the tool may be not very perfect at present, hope you can improve it with us.
Thanks for your support
BR

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That's great! Look forward to get that tool and for sure participate for it's improvement.  Post time Oct 08, 2015 15:26

hnsncxy  
tkaiser replied at Thu Oct 8, 2015 03:14
Thx for the detailled answers. Regarding the power requirements of the USB ports the PSU recommend ...

Sorry, The USB Port doesn't support the CDP.

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