How to get started with FPGA DSP designs.
We live in a very business oriented society. As a result, new products are subjected to market driven specifications such as time to market and cost. Many of these products require computer systems that also have to take these specifications into account. For this reason embedded systems are far more applicable than pc type computing solutions. An embedded system is basically a fully customized computer system which is optimized for its specific function. It can usually be developed and produced at a lower cost than a traditional computer solution.

Today GPS is involved in many location based services, more and more mobile equipment are integrated GPS feature inside. This article will cover GPS receiver module design based upon existing chip-set, component and firmware/software sources. I will prepare extra article for GPS system design, which cover mobile platforms, system programming, back-end web integration and etc. I will try my best to delivery mentioned content on open source projects.

The software trap is a programming feature used to capture an abnormal program running status. The general principle is to setup a trap for software, and redirect from the code out of control to a specified address, and get back to its normal running mode. The software traps can be placed between the user codes or after the jump instructions, or be placed in the unused space by a consecutive trap codes. The most popular trap code for 80C51 is 5 byte instruction, which is:

The microcontroller is widely used in many devices, which works in environment. The microcontroller has to face the challenges from EMI, voltage stability, crystal failure and much other interference. If the interferences are strong enough to disturb the operation, the system design should be secure enough to deal with these matters, one good practice is to reset and go on with previous normal operation state . However, a simple reset is not enough at all. I will demonstrate the basic principle for the system reset and state restore. Please keep in mind that the terminologies used in this article may come from different microcontrollers.

INTRODUCTION

"A printed circuit board, or PCB, is used to mechanically support and electrically connect electronic components using conductive pathways, or traces, etched from copper sheets laminated onto a non-conductive substrate. Alternative names are printed wiring board (PWB),and etched wiring board. A PCB populated with electronic components is a printed circuit assembly (PCA), also known as a printed circuit board assembly (PCBA)." from Wikipedia Printed Circuit Board