8LED流水灯，一灯亮流水LED

#include "config.h" #include "lpc213x.h" void DelayNs(uint32 dly) { uint32 i; for(;dly;dly--) for(i=0;i<5000;i++); } /******************************************************************************* *名称:main() *功能:初始化外部中断0,外部中断1及I/O连接等 *******************************************************************************/ int main(void) { uint32 i=0; PINSEL0 = 0x00000000; PINSEL1 = 0x00000000; IO0DIR = 0x0000000FF; IO0SET = 0x0000000F; //高电平为关灯,现关闭板上四盏灯. while(1) { if(i==8)i=0; IO0CLR = 0x00000001<<i++; DelayNs(100); IO0SET = 0x00000001<<i-1; //高电平为关灯,现关闭板上四盏灯. DelayNs(100); } }