2440_led.zip

#define GPFCON (*(volatile unsigned *)0x56000050) #define GPFDAT (*(volatile unsigned *)0x56000054) #define GPFUP (*(volatile unsigned *)0x56000058) /*延时函数*/ void Delay(unsigned int x) { unsigned int i,j,k; for(i=0;i<=x;i++) { for(j=0;j<0xff;j++) { for(k=0;k<0xff;k++) { ; } } } } int LedMain() { GPFUP &= 0x87;//IO 上拉使能 GPFCON &= 0xD57F;//输出有效，首位清0 GPFCON |= 0x1540;//输出有效，末位置1 GPFDAT |= 0x78;//清零 while(1) { GPFDAT |= 0x78; GPFDAT &= 0xF7; Delay(400); GPFDAT |= 0x78; GPFDAT &= 0xEF; Delay(400); GPFDAT |= 0x78; GPFDAT &= 0xDF; Delay(400); GPFDAT |= 0x78; GPFDAT &= 0xBF; Delay(400); } return(0); }