//單片機ISD25120語音電路程序
//2006年6月語音芯片適用
//AT89C54_Ver1.00
#include <REGX51.H>
#include <stdio.h> 
#include <intrins.h> 

#define ISD_DAT P1								//語音地址線
#define ISD_RED P3_5							//錄音按鍵						
#define ISD__CE P3_4                            //片選,低電平工作						
#define ISD_KPE P3_3                            //短放音鍵
#define ISD_LED P3_2                            //指示燈

sbit A9=P1^7;
sbit A8=P1^6;
sbit A5=P1^5;
sbit A4=P1^4;
sbit A3=P1^3;
sbit A2=P1^2;
sbit A1=P1^1;
sbit A0=P1^0;

void time(int nt)								//延時函數
	{long int it=0;
	for(it=0;it<nt*1000;it++);
	return;
	}
void Delay(unsigned char num) 					//delay(num*2ms)S
	{unsigned char i;
    while(--num!=0)
		{for(i=0;i<125;i++);
		}
	}
void Init_ISD2500()								//initial ISD2500
	{ISD__CE=1;
	P1=0x00;									//init:address A0--A9 must be 0;
	A0=0;A1=0;A2=0;A3=0;  										
  	A4=0;A5=0;A8=0;A9=0;
	}

main()
{ 	long int i=0;
	unsigned int key=0;	

 	ISD_LED=0;time(4);								
	ISD_LED=1;time(4);								
  	ISD_LED=0;time(4);
	ISD_LED=1;time(4);
	Init_ISD2500( );							//地址初始化

START:
  if(ISD_KPE==0)								
  	{Delay(10);									//延時去抖動
   	if(ISD_KPE==0)								//確認按鍵已按下
   		{do	{
     		A5=1;
     		Delay(10);
     		ISD__CE=0;
     		ISD_LED=0;							//點亮錄音指示燈
     		}while(ISD_KPE!=1);					//等待按鍵釋放,結束錄音
    	A5=0; 									//reset
    	ISD__CE=1;
    	ISD_LED=1; 								//關閉錄音指示燈
   		}
  	}

	goto START;
}