Showing Posts With Tag

Linux

Making initramfs image with Yocto
Post about creating an initramfs image with Yocto. This image can be used as a base for tasks that can benefit from having a compact rootfs loaded together with the kernel, like having a recovery in SWUpdate.

Making initramfs image with Yocto

Embedded systems can have different types of persistent (non-volatile) storage, like eMMC, SD card, NOR or NAND flash memory. Each storage type has advantages and disadvantages with regards to the re...

Custom SPI peripheral in QEMU
Instructions on creating a new SPI peripheral in QEMU, as well as adding userspace software support for it, and testing the complete setup.

Custom SPI peripheral in QEMU

In previous posts the process for creating a custom [memory mapped](../ldd-custom-qemu-device/) and [I2C](../qemu-custom-i2c-peripheral/) peripheral in QEMU was shown. In this post we will go throug...

SWUpdate for Cubieboard QEMU
Details on adding Over-the-Air update for Cubieboard QEMU using SWUpdate. The support is integrated using Yocto.

SWUpdate for Cubieboard QEMU

Software update is an important part of design of modern embedded systems. It allows faster time to market, since fixes, security or stability updates or even new features can be pushed to the device...

Integrating support for custom QEMU peripherals in Yocto
Details on adding new MACHINE to Yocto, in order to support custom memory-mapped and i2c devices.

Integrating support for custom QEMU peripherals in Yocto

In the previous posts a [custom memory-mapped peripheral](../ldd-custom-qemu-device/) was introduced, together with the [Linux device driver](../ldd-linux-device-driver/) for it and a [userspace appl...

Custom I2C peripheral in QEMU
Instructions on creating a new I2C peripheral in QEMU, as well as adding userspace software support for it, and testing the complete setup.

Custom I2C peripheral in QEMU

QEMU supports creating various peripherals, not only the [memory-mapped](../ldd-custom-qemu-device/) shown in previous posts. In this post we will go through the process of creating a new I2C periph...

Userspace application for QEMU custom memory-mapped device
Third part of Linux Device Driver Development using QEMU, which describes steps for creating a userspace application that uses previously developed driver to interact with the custom component that was described in first post.

Userspace application for QEMU custom memory-mapped device

_This is part 3 of the Linux device driver development post series._ In the [previous post](../ldd-linux-device-driver/) the structure of a Linux device driver for the custom memory-mapped periphera...

Linux Device Driver for QEMU custom memory-mapped device
Second part of Linux Device Driver Development using QEMU, which describes steps for creating a Linux device driver for the custom component that was described in first post.

Linux Device Driver for QEMU custom memory-mapped device

_This is part 2 of the Linux device driver development post series._ In the [previous post](../ldd-custom-qemu-device/) the steps for creating a custom memory-mapped peripheral in QEMU were presente...

Creating Custom QEMU Memory Mapped Device
First part of Linux Device Driver Development using QEMU, which describes steps for creating a Custom memory mapped device in QEMU

Creating Custom QEMU Memory Mapped Device

_This is part 1 of the Linux device driver development post series._ In this post we will cover the following things - [Designing custom memory-mapped device in QEMU](#designing-custom-memory-mappe...

Linux device driver development using QEMU - introduction
Introduction post for Linux device driver development using QEMU

Linux device driver development using QEMU - introduction

In the previous [posts](../qemu-board-emulation-part1/) I introduced simple methods to prepare and run a QEMU image for board emulation. Target board was Cubieboard and mainline U-Boot and Linux kern...

Yocto for Cubieboard in QEMU - Step-by-step
Detailed introduction to building Yocto image for Cubieboard and testing in QEMU

Yocto for Cubieboard in QEMU - Step-by-step

In the [previous post](../qemu-board-emulation-part2/) Ubuntu was used as root filesystem. Using Ubuntu as root filesystem is simple and fast to use, but it also has a lot of packages which are not n...

Yocto for Cubieboard in QEMU
Short introduction to building Yocto image for Cubieboard and testing in QEMU

Yocto for Cubieboard in QEMU

## Root filesystem options The root filesystem is an important part of the BSP (Board Support Package), since it holds all of the applications, configuration files and kernel modules. There are sev...

Preparing and running QEMU ARM for Cubieboard (Part 2)
This post will demonstrate running Ubuntu rootfs with QEMU Cubieboard

Preparing and running QEMU ARM for Cubieboard (Part 2)

_This is part 2 of the QEMU Board Emulation post series._ In the [previous post](../qemu-board-emulation-part1/) the basic steps for obtaining and compiling QEMU, U-Boot and Linux were presented. Th...

Preparing and running QEMU ARM for Cubieboard (Part 1)
This post will show basic steps needed for running a Linux image inside QEMU ARM Cubieboard

Preparing and running QEMU ARM for Cubieboard (Part 1)

_This is part 1 of QEMU Board Emulation series_ In this post I will cover the following things - [Building QEMU](#building-qemu) - [Downloading QEMU source code](#downloading-qemu-source-code) ...

QEMU Board Emulation introduction with Cubieboard
Short introduction to QEMU Board Emulation using Cubieboard and OpenWRT

QEMU Board Emulation introduction with Cubieboard

## Why QEMU? There are many cheap COTS (Commercial Off-The-Shelf) development boards available for playing with and learning Embedded linux: [Raspberry Pi](https://www.raspberrypi.org/), [BeagleBone...

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