?? led.c
字號(hào):
#define LED port40 volatile ioport unsigned int port40;extern void LEDTest(unsigned int count);extern void delay(unsigned int period);extern void LEDflash(unsigned int id); void LEDTest(unsigned int count){ unsigned char i,t; for(;count!=0;count--) { for(t=0,i=1;t<8;i=i<<1,t++) { LED=~i; delay(500); } } LED=0xffff;}void delay(unsigned int period){ int periodi, periodj; for(periodi=0; periodi<period; periodi++) { for(periodj=0; periodj<period>>1; periodj++); }}void LEDflash(unsigned int id){ while(1) { LED=id; delay(1500); LED=0xffff; delay(1500); }} ?? 快捷鍵說明
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