Software implementation of LNS arithmetic in an ARM embedded system

Based on open source embedded operating system uClinux, embedded applications system taking ARM microprocessor as the core was connected with Internet. Through embedding Web server to the ARM embedded system functions and adding embedded Gateway Interface CGI program, the interactive delivery with the long-distance customers Web browser order and response information come true.

Download Full-text

Implementation of USB in Embedded Systems Based on ARM Microprocessor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.596.883 ◽

2014 ◽

Vol 596 ◽

pp. 883-887

Author(s):

Xin Li Li

Keyword(s):

Embedded Systems ◽

Embedded System ◽

Hardware Design ◽

Implementation Process ◽

Cost Effective ◽

Software Implementation ◽

Application System ◽

Arm Microprocessor ◽

Working Principle

S3C4510B is a cost-effective 16/32 bit RISC microcontroller based on Ethernet application system, and ISP1161 is a chip which is designed to implement USB protocol in an embedded system. Here, we design and implement embedded systems USB with ISP1161 chip based on ARM microprocessor S3C4510B. This paper describes the basic working principle of ISP1161 chip and hardware design of the system, and presents the software implementation process of USB in embedded systems.

Download Full-text

Audio and Video Decoding and Synchronous Playback for Embedded Systems

Journal of Computer Science Research ◽

10.30564/jcsr.v1i1.165 ◽

2018 ◽

Vol 1 (1) ◽

Author(s):

Zhitao Li

Keyword(s):

Embedded System ◽

Video Data ◽

Video Frame ◽

Test Results ◽

Video Playback ◽

Video Decoding ◽

Arm Processor ◽

Audio Data ◽

Hardware Processing ◽

Arm Embedded System

The audio and video decoding and synchronization playback system ofMPEG-2 TS stream is designed and implemented based on ARM embedded system. In this system, hardware processor is embedded in the ARM processor. In order to make full use of this resource, hardware MFC is adopted. The multi-format codec decoder decodes the video data and decodes the audio data using the open source Mad (libmad) library. The V4L2 (Video for Linux2) driver interface and the ALSA (advanced Linux sound architecture) library are used to implement the video. Because the video frame playback period and the hardware processing delay are inconsistent, the system has a time difference between the audio and video data operations, which causes the audio and video playback to be out of sync. Therefore, we use the method of synchronizing the video playback implemented to the audio playback stream; realize the audio and video are playing sync. Test results show that, the designed audio decodes and synchronization playback system can decode and synchronize audio and video data.

Download Full-text