关键词: DMA控制器； AHB总线； 全球定位系统； 片上系统； 现场可编程门阵列

Abstract: This article discusses the architecture design of DMA controller on high performance GPS receiver based on RTEMS which achieves the optimal integration of DMA IP and navigation baseband system. The authors designed the hardware architecture of DMA IP and made full use of hardware performance with the idea of multiplexing, then used register and FIFO buffer to achieve read-write control. Furthermore, the researchers designed the DMA controller with Verilog HDL and verified the design on Altera Cyclone4 FPGA. The result demonstrates that DMA controller can ease the CPU’s burden and shorten the acquisition & tracking time which improves the performance of the whole system.

Key words: DMA controller; AHB bus; global positioning system(GPS); system on chip; fieldprogrammable gate array (FPGA)