Design and Implementation of the Arm JTAG Emulator

摘要

ARM processors are widely used in embedded electronic products, especially in communication, industry control,and automatic, has become the major processor in embedded electronic products. Nearly all the high performanceemulators are developed by oversea tool providers, which are too expensive to be generally developed by a small or tinycompany. Some JTAG emulator with low price can’t meet the requirements of large scale software development. This paperfocuses on the problems mentioned above, provide a solution to design and implement the ARM JTAG emulator afterstuding ARM EmbeddedICE technology, GDB debugging technology, RSP protocol, μC/OS-II and LwIP and etc. ThisJTAG emulator is designed based on AT91SAM9260, supporting ARM7 and ARM9 serial processor core and JTAGclock rate programming, with the communication interface including 10/100M auto-adapt Ethernet, USB and RS232.