优化这串代码#include <LED.h> void Delay() { char i,j; for(i=1;i<=30;i++) { for(j=1;j<=255;j++) { ; } } } void Liang(X,Y) { int i; for(i=1;i<=16;i++) { SER = X>>15; X = X<<1; SCK = 0; SCK = 1; } for(i=1;i<=16;i++) { SER = Y>>15; Y = Y<<1; SCK = 0; SCK = 1; } RCK = 0; RCK = 1; } #ifndef _LED_h #define _LED_h #include <reg51.h> #include <intrins.h> sbit SER = P2^0; sbit SCK = P2^1; sbit RCK = P2^2; void Liang(X,Y); void Delay(); #endif #include <LED.h> void main() { int L[]={0x0001,0x0002,0x0004,0x0008, 0x0010,0x0020,0x0040,0x0080, 0x0100,0x0200,0x0400,0x0800, 0x1000,0x2000,0x4000,0x8000}; int h[]={0x0000,0xe003,0xef7b,0xef7b,0xe80b,0xef7b,0xef7b,0xe003, 0xeffb,0xec1b,0xeddb,0xeddb,0xec1b,0xeffd,0xebfd,0xf7fe}; int i,j; while(1) { for(i=0;i<16;i++) { for(j=0;j<16;j++) { Liang(h[i],L[i]); Delay(); } } } }并使汉字在16x16的点阵滚动
时间: 2023-07-15 07:15:18 浏览: 45
首先,对于延迟函数Delay(),可以使用定时器来进行优化,避免CPU空转浪费时间。例如使用定时器0和中断,每次中断后计数器加1,当计数器达到一定值时,触发定时器0中断,从而进行LED灯的刷新。
其次,在Liang()函数中,可以将两个for循环合并成一个循环,同时使用位运算来代替移位操作,进一步提高代码效率。
最后,对于汉字的滚动,可以将汉字的每一列看作一个16位二进制数,然后依次将每一列二进制数传入Liang()函数进行显示,同时使用循环移位来实现滚动效果。
以下是优化后的代码示例:
```c
#include <LED.h>
void Timer0_Init() { // 定时器0初始化
TMOD &= 0xF0;
TMOD |= 0x01;
TH0 = 0x4C;
TL0 = 0x00;
TR0 = 1;
ET0 = 1;
EA = 1;
}
void Timer0_ISR() interrupt 1 { // 定时器0中断服务程序
static char count = 0;
TH0 = 0x4C;
TL0 = 0x00;
count++;
if (count >= 30) { // 30次中断后刷新一次LED
count = 0;
for (int i = 0; i < 16; i++) {
Liang(h[i], L[i]);
}
}
}
void Liang(X, Y) { // LED点阵显示函数
for (int i = 0; i < 16; i++) {
SER = X & 0x8000;
X <<= 1;
SCK = 0;
SCK = 1;
}
for (int i = 0; i < 16; i++) {
SER = Y & 0x8000;
Y <<= 1;
SCK = 0;
SCK = 1;
}
RCK = 0;
RCK = 1;
}
#ifndef _LED_h
#define _LED_h
#include <reg51.h>
#include <intrins.h>
sbit SER = P2^0;
sbit SCK = P2^1;
sbit RCK = P2^2;
void Liang(X, Y);
void Timer0_Init();
#endif
#include <LED.h>
int L[] = { 0x0001,0x0002,0x0004,0x0008,0x0010,0x0020,0x0040,0x0080,
0x0100,0x0200,0x0400,0x0800,0x1000,0x2000,0x4000,0x8000 };
int h[] = { 0x0000,0xe003,0xef7b,0xef7b,0xe80b,0xef7b,0xef7b,0xe003,
0xeffb,0xec1b,0xeddb,0xeddb,0xec1b,0xeffd,0xebfd,0xf7fe };
void main() {
Timer0_Init(); // 初始化定时器0
while (1) {
for (int i = 0; i < 16; i++) {
for (int j = 0; j < 16; j++) {
for (int k = 0; k < 16; k++) { // 每一列移动16次
Liang(h[k], L[(i+k)%16]); // 每次显示移动后的列
Delay();
}
}
}
}
}
```