Embedded Linux system basis: Difference between revisions
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* basic utilities (in our case regrouped as one executable through [[Busybox]]) | * basic utilities (in our case regrouped as one executable through [[Busybox]]) | ||
* additionnal librairies and tools | * additionnal librairies and tools | ||
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To build all these tools, you need a "build system". We use Buildroot. | |||
Revision as of 11:01, 11 June 2010
An embedded Linux system is very similar (when speaking about software) to a Desktop one, thanks to the power of the latest embedded microprocessor, like the ARM9 one. It is composed of:
- a bootloader, which is the first bits of code executed when the processor starts. It behaves like the BIOS+Grub combination on Desktop PCs.
- an operating system = the Linux kernel
- many programs and librairies organised in a filesystem = the rootfs
The bootloader
In our case our bootloader is U-Boot. It's main role is to initialize the hardware, load the Linux kernel and launch it with the correct parameters
The kernel
In our case Linux.
The rootfs
It is composed of:
- a C library
- basic utilities (in our case regrouped as one executable through Busybox)
- additionnal librairies and tools
To build all these tools, you need a "build system". We use Buildroot.
