[yocto] How to flash core-image-sato to a Nvidia Jetson TK1?

[Khem Raj]

> On Aug 6, 2015, at 11:13 AM, Dalton Fury <daltonfury42 at gmail.com> wrote:
> 
> I see, but why boot from SD card, which is slower when there is eMMC?

easy to flash and wanted to keep ubuntu around.

> 
> Anyways, I flashed it successfully. But now I have no clue as to how to enable CUDA.
> 
> I want to do some image processing with OpenCV/CUDA. What I tried is to compile opencv with USE_CUDA=ON flage set in cmake. Then I tested to see if I an use the gpu with opencv. But can't, and get 0 when I call  gpu::getCudaEnabledDeviceCount(). This clearly indiacates that cuda is not installed. So how do I install CUDA?

We use precompiled drivers package from nvidia for this.

Do you have /etc/ld.so.conf on target ?
if not create one with following content

/usr/lib/arm-linux-gnueabihf/tegra/

and ensure that libcuda.so is there on target

> 
> On Thu, Aug 6, 2015 at 9:29 AM, Khem Raj <raj.khem at gmail.com <mailto:raj.khem at gmail.com>> wrote:
> 
>> On Aug 3, 2015, at 11:15 AM, Dalton Fury <daltonfury42 at gmail.com <mailto:daltonfury42 at gmail.com>> wrote:
>> 
>> Hi,
>> 
>> I am a hobbyist, and liked yocto very much since I used in on an old Pandaboard ES. Now I got my hands on a Nvidia Jetson TK1, and want to get a yocto running on it. I intend to use it for heavy image processing and I prefer not to do it with the Ubuntu which comes with it loaded with GUI and Unity and all. So I build the image, but could not find any information on how to flash it to the eMMC on the board.
>> 
>> Nvidia provides scripts for doing this. The process is as follows:
>> 
>> 1) Download the driver package and extract it.
>> 
>> 2) Download the sample rootfs and extract it to `rootfs` folder in where the driver package is extracted.
>> 
>> 3) Run the apply_binaries.sh script. Upon inspecting the script, I found that it copies NVIDIA user space components, Nvidia firmware files, BSP test tools, gst test applications, create a lot of symbolic links within the rootfs extracted to the 'rootfs' folder. It also places the firmwares and kernel modules, and also copies some configuration files for the boot loader(U-Boot).
>> 
>> 4) Run flash.sh.
>> 
>> What I did is to copy the rootfs that was made with yocto, and entirely skip Step 3 assuming that all the necessary software is already made with yocto as a result of adding the BSP. This attempt of course, failed. Thought the kernel booted, it froze halfway. No error message. Just a flack screen with a while "_" on the top left corner.
>> 
>> This is the bsp I used: https://github.com/kraj/meta-jetson-tk1 <https://github.com/kraj/meta-jetson-tk1>
>> 
>> This is the guide I used as reference: http://elinux.org/Tegra/Downstream_SW/Gentoo_From_eMMC <http://elinux.org/Tegra/Downstream_SW/Gentoo_From_eMMC>
>> 
>> If anyone has experience performing this(i bet you do), please help me out. Thanks.
> 
> I have booted Angstrom XFCE-nm-image on it from SD card. Firstly you need to flash new kernel and also modify the boot loader arguments so it boots from SD card first.
> all instructions to update the boot loader cmdline and kernel are documented
> 
> see https://cyclicredundancy.wordpress.com/2014/05/10/flashing-the-rootfs-on-a-nvidia-jetson-tk1/ <https://cyclicredundancy.wordpress.com/2014/05/10/flashing-the-rootfs-on-a-nvidia-jetson-tk1/>
> 
> you might need
> 
> sudo ./flash.sh -S 14580MiB jetson-tk1 mmcblk0p1
> 
> 
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