Through-the-wall surveillance (TWS) technology is an emerging technology that allows the user to see through obstacles, such as concrete walls, doors and other visually-opaque materials. Though initially developed for military use, it is now being used by law-enforcement agencies as costs have become more affordable.
Handheld instruments were traditionally meant for field applications, but these are now being used in the research and development sector as a complementary product to existing benchtop instruments.
Before going into how to select the best handheld for a particular application, one has to understand if a handheld device is required at all.
This article gives information on FPGA-embedded processors with particular emphasis on the Embedded Development Kit (EDK) from Xilinx. The article also presents an illustrative example of a hands-on experience with the EDK design.
The focus in this article is on clock management in field-programmable gate arrays (FPGAs). It talks about the digital clock manager (DCM), which is a primitive used in FPGAs from Xilinx for dealing with all aspects of clock management.
The first and second parts of the article discussed the implementation of I2C master controller and LCD display using FPGAs. The focus in this part is on designing an RS232 UART controller using an FPGA for both transmission and reception of data. The basics of RS232 protocol, data transmission and VHDL code along with details are presented in the following paragraphs.
The first part of the series discussed the implementation of I2C controller using an FPGA. The focus in this part is interfacing FPGA with LCD. The basics of LCD operation, hardware interconnection and VHDL code along with its description are presented here.