Apple announced the iBeacon format, which basically makes use of the advertisement channels available in the Bluetooth LE spectrum to broadcast information about the beacon. Google followed, defining a backward compatible standard called Eddystone. Here are some useful links about the space in general.
While working with a new board we had to test the SPI communication on board from user space. We knew that the SPI bus was functional because we were able to load a u-boot image from a SPI based daughter board on configuring the bootstrap settings and powering up the board. We decided to write a userspace program to read the JEDEC ID of the SPI Flash chip.
In this post we will run the cyclictest utility and benchmark the RT Preempt Kernel on BeagleBone Black
In the second part we will take a look and see how to apply the RT-Preempt patches to the 3.18 kernel for BeagleBone Black.
The RT-Preempt patch converts Linux into a fully preemptible kernel. In the first part we'll build the 3.18 version of the kernel for the BeagleBone Black using Robert Nelson's bb-kernel tree.
In the first part we worked on getting LTIB configured for our machine. We ran into alot of problems but fixed each problem after a bit of online reading. In this part we attempt to actually build the bootloaders, kernel and applications with LTIB which will comprise the BSP
My first attempt at building the BSP for i.MX28 evaluation board. Freescale provides the source code required to build the BSP for its i.MX28 evaluation board. We take a look at the tool LTIB which is used to build its BSP.
The i.MX28 development environment provides a utility like sdimage which is used to flash the bootstream files to the Freescale firmware partitions. In this post we walk through the code of sdimage to understand its implementation
We will take a look at how to access an SD Card on a Windows Laptop through an Ubuntu VirtualBox virtual machine.
Understanding information about packages before using apt-get
A new website to document all that is technical. Thanks to Github Pages and Awestruct I now blog and publish like a hacker.
The kernel version that a kernel module is built with can differ from the kernel version it is running on.
A brief overview of the cache and it's purpose in computing
Linked lists reloaded, Linux style
We now take a look at the TWI/I2C API responsible for data transfer. The header file https://github.com/zeuzoix/sardine/blob/master/twi.h[twi.h] has the prototype. We'll take a look at the arguments and their description now
We learned about the different registers available in the Atmel AVR microcontroller to program the TWI interface. In this section we'll go through the twi_init API and the initialization of the TWI interface.
So you want to program the TWI/I2C interface of the AVR. Well you'll need to read up about the registers used to control this interface.
In this post we'll take a look at implementing an I2C/TWI library which can be used with Atmel's AVR micro-controller.
I've been a SVN user for quite some time. However it's good to understand why GIT has risen in popularity.
In the first part we went through a brief introduction of the DS1307 chip. We know the DS1307 can be programmed via the I2C bus i.e SDA and SCL. Through I2C we should be able to address the registers of this chip and write and read data based on our application description.
You're developing a product and you need it to track time even when the power is switched off, what do you use? A real-time clock.
I've been going through various sources trying to figure out what the Electronic DIY community uses to develop LED cubes, RC controlled cars, etc.
I2C is a serial data bus used to interface low speed peripherals developed by Phillips.
You've got your kernel module code ready and you want to build it.
A unique feature of the Linux Kernel is its ability to allow injection of code while it is running. This piece of code is called a kernel module.
This post highlights the comparison of the required functionalities of an OS with that of Linux.
It's amazing, I'm going through the news paper and I read about people in Tokyo who've queued outside an Apple store to buy the iPhone 4s in memory of the late Steve Jobs.