Source Petalinux and Bootgen
----------------------------------
source /home/helios/Petalinux/2024.1/settings.sh
export PATH="/home/helios/bootgen/:$PATH"
source /home/helios/Xilinx/Vivado_Lab/2024.2/settings64.sh

To change hardware design
----------------------------------
1. export the new .xsa file to the project folder
2. Go to that project folder
3. petalinux-config --get-hw-description ./<name of .xsa file>
4. petalinux-build
5. petalinux-package boot --u-boot --force

To program fpga with jtag
----------------------------------
1.Disconnect all FPGAs except the one you need to boot
2.petalinux-boot jtag --kernel

To check serial
----------------------------------
sudo picocom -b 115200 /dev/ttyUSB4 (USB4 for leaf, USB1 for root)
or sudo screen /dev/ttyUSB1 115200 (CtrlA + K to exit)
use petalinux login name to set up the password
use ifconfig after booting to find the ip
ip addr show eth0 | grep inet | grep -v inet6 | awk '{print $2}' | cut -d/ -f1

To transfer kernel modules (leaf/root driver)
----------------------------------
In the original terminal calling petalinux boot
scp build/tmp/sysroots-components/versal_generic_xcvm1802/leaf-driver/lib/modules/6.6.10-xilinx-v2024.1-g3af4295e00ef/updates/leaf-driver.ko [email protected]:/home/petalinux
scp build/tmp/sysroots-components/versal_generic_xcvm1802/root-driver/lib/modules/6.6.10-xilinx-v2024.1-g3af4295e00ef/updates/root-driver.ko [email protected]:/home/petalinux

C code for root driver
----------------------------------
~/Petalinux/vfs_v2/vfs_v2_root/project-spec/meta-user/recipes-modules/root-driver/files

to rebuild module: 
In the ~/Petalinux/vfs_v2/vfs_v2_root
petalinux-build -c root-driver

Adding a new BRAM to any design
----------------------------------
The added BRAM will be reflected in 
~/Petalinux/vfs_v2/vfs_v2_root/components/plnx_workspace/device-tree/device-tree/pl.dtsi
No changes are needed to that file.
In the file ~/Petalinux/vfs_v2/vfs_v2_root/project-spec/meta-user/recipes-bsp/device-tree/files/system-user.dtsi
Change the compatible to the correct driver

C code for leaf data generaotr
----------------------------------
USe the readme file at ~/Petalinux/vfs_v2/vfs_v2_leaf/project-spec/meta-user/recipes-apps/datagenerator
```
How to change application code
===================================
Code needs to be cross-compiled before building 

1. cd ./project-spec/meta-user/recipes-apps/datagenerator/files/
2. aarch64-linux-gnu-gcc configuration.c random_seeds.c -o config -lm
3. aarch64-linux-gnu-gcc main.c random_seeds.c -o main -lm
4. petalinux-build
```

Build the leaf driver as same as the root driver