Network adapter is one of the most important components of NOC which is recommended to be used in present and future SOCs. In this paper, a network adapter compatible with OCP interface protocol is designed to enable the integration of IP cores from different providers into an on-chip interconnection network. In order to tradeoff communication performance with complication, the design of network adapter is based on a single global address space and supports burst transmission and virtual channel technology. With the goal of reducing transport latency, the processes of encapsulation and decapsulation are executing simultaneously with packet transmitting and receiving. Considering the simulation result, the network adapter presented in this paper gets satisfactory performance.

This paper presents a transaction-level on-chip communication network model, including routers and links, which can be easily employed in a system-level system-onchip simulation framework for early functional verification and architecture analysis. The model is capable ofproviding NoC's latency and throughput information during simulating process and developed in SystemC to achieve high simulation speed'.

Abstract. In this paper, we design and implement general parameterized IP (Intellectual Property) cores of convolutional encoder with SMIC 0.35µm CMOS technology, serial structure and parallel structure respectively. And analyze each of the power dissipation using Synopsys PTPX tool. The result shows the parallel circuit structure saves 14 percent power dissipation compared to that of serial circuit structure, with the same encode radio. Meanwhile, computing speed of parallel structure with 8-bit parallelism is 8 times than that of serial structure under the same clock frequency. Certainly, serial circuit structure has their particular characters such as easily realized and less resource consumption.

The control system of laser engraving machine based on ARM processor realize the precise control of the two-dimensional stepping motor and the laser head. This article focuses on the proposed stepping motor speed and trajectory control algorithm, and meanwhile, the speed control adopt linear acceleration and deceleration control algorithm; Trajectory control, based on the traditional point by point comparison arc interpolation method, puts forward the improved algorithm which can effectively improve the interpolation speed and interpolation accuracy. The experimental results show that the method can improve the machining precision and machining efficiency of laser engraving machine, and also can realize the high precision carving.