代码:流水灯程序。
/* *info:led flow *author:chenlu *date:2014.11.20 */ //input the head file so that the program can work normally //iom16v---know the register //macros---know the BIT(x) #include<iom16v.h> #include<macros.h> //use those can make your study very conveninet #define uint unsigned int #define uchar unsigned char //display methods void initSystem(); void delay(); //display the variable data uchar flag; //the main function void main() { //init your system initSystem(); while(1) { //start your function,and this is core solution for(flag=0;flag<8;flag++) { PORTA = BIT(flag); delay(); } } } //the method of init system void initSystem() { //to make PA port output DDRA = 0xFF; //to make PA port output high level PORTA = 0xFF; } //the sub method of delay void delay() { uchar i,j; for(i=0;i<200;i++) for(j=0;j<200;j++); }
在这里就不上传实验结果图片了。读者自己揣摩循环的机制。利用了for循环和BIT(x)操作。
时间: 2024-08-28 04:31:11