test.c

周立功单片机DP51+程序

#include<REG52.h>
#include<key_s.h>
main()	
{	
    unsigned char i;
   	i=0xff;	//赋初值为0xff
	while(1)
	{	
		KD_KEY=1;
	   	send(0x00);		//判断有键盘按