要实现8盏灯轮流闪亮,可以使用C语言编写一个程序,通过控制单片机的端口来点亮和熄灭LED灯。以下是几种不同的实现方法:
方法一:使用循环左移操作
```c
include
typedef unsigned int u16;
typedef unsigned char u8;
sbit leda = P0;
sbit led1 = P0^0;
sbit led2 = P0^1;
sbit led3 = P0^2;
sbit led4 = P0^3;
sbit led5 = P0^4;
sbit led6 = P0^5;
sbit led7 = P0^6;
sbit led8 = P0^7;
void delay(u16 i) {
while(i--);
}
void main() {
while(1) {
leda = 1; // 全部灯亮
// 从左到右依次熄灭
led1 = 0; delay(50000); // 大约延时450ms
led2 = 0; delay(50000); // 大约延时450ms
led3 = 0; delay(50000); // 大约延时450ms
led4 = 0; delay(50000); // 大约延时450ms
led5 = 0; delay(50000); // 大约延时450ms
led6 = 0; delay(50000); // 大约延时450ms
led7 = 0; delay(50000); // 大约延时450ms
led8 = 0; delay(100000); // 大约延时900ms
leda = 1;
}
}
```
方法二:使用数组和循环
```c
include
typedef unsigned int u16;
typedef unsigned char u8;
sbit leda = P0;
sbit led1 = P0^0;
sbit led2 = P0^1;
sbit led3 = P0^2;
sbit led4 = P0^3;
sbit led5 = P0^4;
sbit led6 = P0^5;
sbit led7 = P0^6;
sbit led8 = P0^7;
void delay(u16 i) {
while(i--);
}
void main() {
while(1) {
u8 led_array = {0xFF, 0xFE, 0xFD, 0xFC, 0xFB, 0xFA, 0xF9, 0xF8};
for(u8 i = 0; i < 8; i++) {
P0 = led_array[i];
delay(50000); // 大约延时450ms
}
}
}
```
方法三:使用定时器和中断