单片机C语言应用100例
单片机C语言应用100例,单片机,语言,应用,利用,运用
/实例32:用指针作函数参数控制P0口8位LED流水点亮#include/*函数功能:延时约150ms*/void delay(void)unsigned char m,n;for(m=0;m200;m+)for(n=0;n250;n+);/*函数功能:流水点亮P0口8位LED*/void led_flow(unsigned char *p) /形参为无符号字符型指针unsigned char i;while(1)i=0; /将i置为0,指向数组第一个元素while(*(p+i)!=0) /只要没有指向数组的结束标志P0=*(p+i);/ 取的指针所指变量(数组元素)的值,送P0口delay(); /调用延时函数i+; /指向下一个数组元素/*函数功能:主函数*/void main(void) unsigned char code Tab =0xFE,0xFD,0xFB,0xF7,0xEF,0xDF,0xBF,0x7F, 0x7F,0xBF,0xDF,0xEF,0xF7,0xFB,0xFD,0xFE,0xFF,0xFE,0xFC,0xFB,0xF0,0xE0,0xC0,0x80,0x00,0xE7,0xDB,0xBD,0x7E,0xFF,0xFF,0x3C,0x18,0x0,0x81,0xC3,0xE7,0xFF, 0xFF,0x7E;/流水灯控制码 unsigned char *pointer;pointer=Tab;led_flow(pointer);
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