FAQ_MA35D1_Network File system by Yocto

[ytliu6]

This can cross-compile the application on PC and execute it on device through NFS rather than build the whole Linux image or use another way to send the application to device.
The following demo is operated on Ubuntu 20.04 not in the Docker container
First, install the network file system server on host OS

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$ sudo apt-get install nfs-kernel-server nfs-common

Create a folder to put your application code and shared with device
Modify the network file system setting. Add the following statement in exports

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$ sudo gedit /etc/exports
Add ” *(The folder path you want to share)*(EVB’s IP ADDRESS)(rw,sync,no_root_squash, no_subtree_check) ”
/home/user/yocto/helloworld 192.168.0.100(rw,sync,no_root_squash,no_subtree_check)

Restart the network file system service

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$sudo /etc/init.d/nfs-kernel-server restart

Enable NFS client in Linux kernel

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~/build$ bitbake linux-ma35d1 -c devshell
~/build/tmp-glibc/work-shared/ma35d1-evb/kernel-source# make menuconfig

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File systems  --->
    [*] Enable POSIX file locking API
    [*] Network File Systems  --->
           <*>   NFS client support
           <*>        NFS client support for NFS version 2
           <*>        NFS client support for NFS version 3
           [*]          NFS client support for the NFSv3 ACL protocol extension
           <*>        NFS client support for NFS version 4

Leave the kernel setting

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~/build/tmp-glibc/work-shared/ma35d1-evb/kernel-source# exit

Add nfs-utils to image and add the command to /build/conf/local.conf

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IMAGE_INSTALL_append = "nfs-utils"

Re-compile image and program to device

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~/build$ bitbake linux-ma35d1 -C compile
~/build$ bitbake nvt-image-qt5

Create a folder in device terminal

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root@ma35d1-evb:~# mkdir -p /mnt/nfs

Check the IP address if device and host are in the same internet domain
Mount the NFS on device

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mount -o nolock -t nfs 192.168.0.103:/home/user/yocto/build/helloworld /mnt/nfs/

Now, you can find the folder shared with host helloworld folder

FAQ_MA35D1_Network File System 1.png (88.52 KiB) Viewed 6783 times

After cross-compile the application, you can copy the binary file to USB storage and execute on evaluation board
Copy the application to USB drive, insert it to evaluation board, and confirm USB device number

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$ fdisk -l

Create a folder named usb for USB device under mnt folder, and mount on USB device

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$ mount /dev/sda1 /mnt/usb

Execute the application

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$ ./hello

FAQ_MA35D1_Network File System 2.png (15.81 KiB) Viewed 6783 times