Research
The Implementation of DMA Controller on Navigation Baseband SoC
This article discusses the architecture design of DMA controller on high performance GPS receiver based on RTEMS. We achieve the optimal integration of DMA IP and navigation baseband system. We designed the hardware architecture of DMA IP and make full use of hardware performance with the idea of multiplexing. We use register and FIFO buffer to achieve read-write control. And we design the DMA controller with Verilog HDL. Finally we verify the design on Altera Cyclone4 FPGA. The result demonstrates that DMA controller can ease the CPU’s burden and shorten the acquisition & tracking time thus improving the performance of the whole system.
Design of a Five Stage Pipeline CPU with Interruption System
A central processing unit (CPU), also referred to as a central processor unit, is the hardware within a computer that carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of the system. The term has been in use in the computer industry at least since the early 1960s.The form, design, and implementation of CPUs have changed over the course of their history, but their fundamental operation remains much the same. A computer can have more than one CPU; this is called multiprocessing. All modern CPUs are microprocessors, meaning contained on a single chip. Some integrated circuits (ICs) can contain multiple CPUs on a single chip; those ICs are called multi-core processors. An IC containing a CPU can also contain peripheral devices, and other components of a computer system; this is called a system on a chip (SoC).Two typical components of a CPU are the arithmetic logic unit (ALU), which performs arithmetic and logical operations, and the control unit (CU), which extracts instructions from memory and decodes and executes them, calling on the ALU when necessary. Not all computational systems rely on a central processing unit. An array processor or vector processor has multiple parallel computing elements, with no one unit considered the "center". In the distributed computing model, problems are solved by a distributed interconnected set of processors.
