适用于S3C2410,使开发板上的LED3和LED4交替着亮灭。程序用ADS1.2编译通过，非常之简单，但可从中了解C与汇编之间的调用，适用于刚接触ARM的初学者。-applicable to the S3C2410, the development board and LED4 indicates a turn-destruction. Procedures used ADS1.2 compile, very simple, but will be able to understand C and Series between the call, in the fourth year ARM beginners.