- 30 Mar, 2025
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 read/write speed, cost per amount of data that can be stored, number of write cycles, etc. The non-volatile memory is needed to store the root filesystem, as well as certain configuration data. The root ...
- 20 Oct, 2024
Custom SPI peripheral in QEMU
In previous posts the process for creating a custom memory mapped and I2C peripheral in QEMU was shown. In this post we will go through the process of creating a new SPI peripheral, and userspace supp ...
- 21 Jul, 2024
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 devices ...
- 09 Jun, 2024
Integrating support for custom QEMU peripherals in Yocto
In the previous posts a custom memory-mapped peripheral was introduced, together with the Linux device driver for it and a userspace application which can be used to interact with it. Besides the memo ...
- 26 May, 2024
Custom I2C peripheral in QEMU
QEMU supports creating various peripherals, not only the memory-mapped shown in previous posts. In this post we will go through the process of creating a new I2C peripheral, and userspace support for ...