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Technical Guitar Review

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tkaiser  
Edited by MKT at Sun Nov 8, 2015 23:02

No unboxing stuff, no video, not even images. Just technical informations I was able to gather within the hour I was able to play with the Guitar so far: http://forum.armbian.com/index.p ... of-lemakers-guitar/

At the moment I'm very disappointed about the quality of documentation (even basic stuff like the listed kernel version for OS images is just wrong, same applies to many informations in the Wiki), the lack of any manufacturer's documentation (Actions Semi) and an SDK so I will stop right now and wait a bit how/if the situation improves.
Thanks for your good suggestion again. We do appreciate you.
At currently, the Guitar is now just some samples for developers like you, not be public sold to all the world, so now only a little information available now. And we are now preparing more materials for users and developers, we soon will publish a Linux manuals for Guitar. We will also publish the source code into Github at about 9.20. Because there is some GPL violation in the SDK, we need delete it.
And the download page has wrong information about the Lemuntu OS, because the website developers just copy and paste the information from banana pro. And all the webpage on LeMaker.org will be updated at 9.16. Please give us some little time.
And here is a library for GPIO control by python for Guitar and Banana Pro. https://github.com/LeMaker/LMK.GPIO
You can help to test it. It just like a RPi.GPIO library, all the functions api are the same.

tkaiser  
To be honest: I don't need an SDK (containing GPL violations or not).

It's totally ok if you publish Linux kernel and u-boot sources now. Then I could test the stuff I'm interested in (adding btrfs and UAS support to the kernel). The way you release documentation and sources you should immediately stop claiming LeMaker being an 'Open Source SBCs community' since this is all just closed. 'Open source' is totally different from what you're doing right now. And it's hard to try again to rely on informations in your wiki or on the main site since you never know when it's just copy&paste from somewhere or real information.

tkaiser  
FYI: I added some additional stuff to my initial short review: http://forum.armbian.com/index.p ... kers-guitar/?p=1952

tkaiser replied at Thu Oct 8, 2015 01:36
To be honest: I don't need an SDK (containing GPL violations or not).

It's totally ok if you publis ...

The GPL violation is included in the Linux kernel, so thisi what we are doing now to clean it.

And we will improve all to achieve our ultimate goal.

tkaiser  
tony_zhang replied at Thu Oct 8, 2015 04:58
The GPL violation is included in the Linux kernel, so thisi what we are doing now to clean it.

Funny. I always thought one would resolve GPL violations by simply releasing the source code

tkaiser  
I did some performance comparisons between the following 4 boards:

  • LeMaker Guitar, Actions Semi S500 quad core SoC, 1.1 GHz, 1 GB RAM, 2 x USB2, 1 x USB3, 1 x Fast Ethernet
  • Raspberry Pi 2, BroadCom BCM2836 quad core SoC, 1.0 GHz, 1 GB RAM, 1 x USB2
  • LeMaker Banana Pi, Allwinner A20 dual core SoC, 0.96 GHz, 1 GB RAM, 3 x USB2, 1 x SATA, 1 x GBit Ethernet
  • Hardkernel ODROID-C1+, Amlogic S805 quad core SoC, 1.7 GHz, 1 GB RAM, 2 x USB, 1 x GBit Ethernet


For details have a look at the updated review: http://forum.armbian.com/index.php/topic/311-quick-review-of-lemakers-guitar/?p=1998

I'm still waiting for a USB3-Micro-B-to-Type-A-female adapter cable to be able to test USB3 storage performance with the Guitar. If that's finished it's time to draw conclusions in which areas the Guitar is superiour and in which not.

hnsncxy  
Edited by hnsncxy at Fri Oct 9, 2015 19:20

Thanks for your review and feedback, we will provide 1.3G CPU frequency to you in the next version. and you can check available frequency by using command below
  1. cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
Copy the Code


fritz  
tkaiser replied at Thu Oct 8, 2015 01:36
To be honest: I don't need an SDK (containing GPL violations or not).

It's totally ok if you publis ...

If you need sources:
https://github.com/xapp-le
its not the same board but the same SOC  ;)

very interesting your review.

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