Embedded Linux S3C2440 – USB Gadget Drivers

Summary Tested on Embedded Linux S3C2440 target board to be configured as USB device, like USB mass storage and serial cable, the test result was successful. And tried to test S3C2440 board as USB Host, I didn’t get successful result. Basics S3C2440 supports 2-port USB host interface as follows, – OHCI Rev 1.0 compatible. – […]

Embedded Linux S3C2440 – Partitions an FileSytem (YAFFS2)

Summary Tested embedded Linux S3C2440 for partitions and YAFFS2 FileSystem with successful result. Embedded Linux S3C2440 booted up on Linux kernel with YAFFS2 FileSystem support and root_yaffs root file image downloaded to a partition of NAND flash. S3C2440 NAND flash 4 partition The NAND flash of S3C2440 board has been divided into 4 partitions. The […]

Embedded Linux S3C2440 Profiling

Summary OProfile is a profiling system can do profiling on all parts of a running system from the kernel to shared libraries and to binaries. It can work in the background, collecting information at a low overhead, it is ideal for profiling the entire system to determine the bottle necks in a real running system. […]

Embedded Linux S3C2440 – Multi-thread Scheduling

Summary Test the debugging of the Multi-thread Scheduling on embedded Linux S3C2440, both in All-stop mode and Non-stop mode. GDB supports multi-thread application debugging, and there are two modes of controlling the execution of the program with GDB dubugger. All-stop mode is the default mode, when the thread of the program stops (at a break […]

Embedded Linux S3C2440 – Kernel Debugging

Summary Conduct Kernel debugging test on Embedded Linux S3C2440 by using KGDB. KGDB has been integrated into Linux kernel from version 2.6.15, it requires a serial connection to the development host. It is a cross GDB running on the development host workstation. Refer to earlier blog entry Embedded Linux S3C2440 – Kernel Module, all the […]

Embedded Linux S3C2440 – Kernel Module

Summary Embedded Linux device driver is part of Linux kernel, application will use Linux device driver to interact with Linux Kernel. You can compile the driver into the kernel or you can compile the driver into module, load and use the module. Application programs have a main() function, where Linux drivers have macro module_init to […]

Embedded Linux S3C2440 Build and Boot an Image

Summary Tried to build and boot zImage on Embedded Linux S3C2440. Install Buildroot I tried to compile and install the latest Buildroot by downloading at https://buildroot.org/ , ‘buildroot-2018.02.9.tar.bz2’, the compiling and installation was successful, and change the /etc/profile to below, PATH=$PATH:/home/iot/buildroot-2018.02.9/output/host/usr/bin TARGET_DIR=/home/iot/buildroot-2018.02.9/output/target Note: you cannot use root to compile Buildroot. But the compiling for busybox […]

Arm Tech Forum 2018 Singapore July 19th, Thursday, 2018

Summary Attended Arm Tech Forum 2018 Singapore on July 19th, Thursday, 2018 Date: July 19th, Thursday, 2018 Venue: Suntec Singapore Convention & Exhibition Centre, Level 3, ROOM 335-336 (1 Raffles Boulevard, Suntec City, Singapore) Open speech by David Kim. Topics Arm’s Automotive Solution for the Autonomous Revolution Overview TrustZone for Armv8-M Why Machine Learning at […]

Samsung ARTIK 530 connect ARTIK Cloud by using Node-RED

Summary Test on Samsung ARTIK 530 connect ARTIK Cloud by using Node-RED, use ARTIK 530 Switch to control the ARTIK 530 LED lighting, go through the cloud (ARTIK 530 switch –> ARTIK Cloud Switch –> ARTIK Cloud Rule engine –> ARTIK530 LED Light), with successful result. ARTIK Cloud control ARTIK 530 LED Create ARTIK Cloud […]

Samsung ARTIK 530 cloud connectivity test

Summary Test on ARTIK 530 connecting to ARTIK Cloud, using ARTIK 530 Switch to control the LED through ARTIK cloud, with successful result. Creating a New Device in ARTIK cloud Refer to this Link, create the “ARTIK Cloud Light”, “ARTIK Cloud Switch” and “Temp Sensor”. Getting the Device Token Generate the device token, device token […]

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