009 Embedded Linux-ARM. StorageQueries and discussion related to usage of Linux on ARM based devices. Linux has been ported to a variety of CPUs which are not only primarily used as the processor of a desktop or server computer, but also ARM, AVR32, ETRAX CRIS, FR-V, H8300, IP7000, m68k, MIPS, mn10300, SuperH, and Xtensa processors, It is also used as an alternative to using a proprietary operating system and toolchain.
LINUX PORTING ON EMBEDDED DEVICES BASED ON ARM PROCESSORS
Versions of Linux such as Ubuntu or Debian can be ported to embedded chipset boards that have ARM processors at their core and associated USB, I2C, UART ports for inflow and ouflow of data. These chipsets have a microUSB port to power them and a USB host port to establish a UART or SSH connection.
Remote Desktop connection can also be established via wifi connection that use IP addresses such as 192.168.x.x and port 22 on Raspberry & BeagleBone boards.
Desired Linux version can be downloaded on a pc from the official portal and written onto a microSD card then be installed in the device using the card.
Onced installed everytime the embedded device will boot from the microSD card. If boot files are copied to eMMC ROM on the embedded device then next time onwards booting will take place from the ROM itself without the need of microSD.
Linux device drivers can be built on desktop pc and copied to the embedded chipset device using rsync command. It first needs to be cross compiled on desktop host machine using option CROSS_COMPILE="cross-compiler" with make command then copied to a folder in embedded device.
The embedded device can be accessed in host desktop machine using a SSH terminal or Remote Desktop terminal.
An embedded Linux system is one that uses Linux as the operating system that sits between the hardware and the application of an embedded device. There are five key components to an embedded Linux system:
1) Hardware processor 2) Hardware abstraction layer (HAL) 3) Linux operating system
4) Service layer
5) Application layer
Embedded devices are restricted by environments that generally dictate low power consumption, reduced processing power, memory limitation, and peripheral availability by design. There are a multitude of hardware architectures, including x86, Arm, PPC, and RISC-V, each having their own advantages and limitations (such as low power consumption and limited software support).
Embedded Linux Advantages Embedded Linux offers developers several advantages over other operating systems: -> Cross-compilation for any supported platform -> Community reflection of Common Vulnerabilities and Exposures (CVE) fixes in updated releases -> Deployment to commonly used Linux infrastructure and tools -> Modern, cloud-native environment -> Broad hardware support -> Product lifecycle through community LTS
