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This work presents a highly integrated single chip multi-functional, multi-waveform signal generator which can generate various waveforms, with digital controller inside to adapt embedded and low power applications. The proposed system is composed by Nios II, DDS (Direct Digital Synthesis) and other peripherals. Nios II is a reconfigurable, programmable and optimizable soft-core embedded CPU. DDS...
In order to enhance the resolution of Charge Coupled Device (CCD) pixel with the pixel dimension and focal length of optical system unchanged, the problem of CCD geometric superresolution is educed. The problem is discussed in terms of software and hardware. In software, the bicubic interpolation is introduced, while in hardware, the subpixel imaging method is utilized. The subpixel imaging method...
This paper presents a general design method on serial interface device driver, which is based on the analysis of Modbus protocol and QNX operation system (QNX OS) device driver architecture. Further, the paper specifies serial port communication in C program under QNX OS, and tests its communication with SIEMENS S7-200 PLC. The test result has proved that the method is real-time, stable, and reliable.
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