搜搜考试网能帮我详细解释下该程序,我是初学者,
来源：学生作业帮 编辑：搜搜考试网作业帮 分类：综合作业 时间：2024/04/28 05:42:08
能帮我详细解释下该程序,我是初学者,
#include
#define uchar unsigned char
uchar tab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71}; //0到f
uchar keyval;
uint x;
void delay(uchar a)
{
uchar i,j;
for(i=0;i
#include
#define uchar unsigned char
uchar tab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71}; //0到f
uchar keyval;
uint x;
void delay(uchar a)
{
uchar i,j;
for(i=0;i
这是矩阵键盘的逐行扫描法,先给P3口0x0f,再判断p3口还等于0x0f不,延时是为了去抖,再判断一次看按键是否还按下,如果按着,就取出键码,最后把键码组合,返回键码