#include <reg51.h>

sbit   SS=P1^0;            				//片選
sbit   SCLK=P1^1;            			//ISD4004時(shí)鐘
sbit   MOSI=P1^2;            			//數(shù)據(jù)輸入
sbit   MISO=P1^3;            			//數(shù)據(jù)輸出
sbit   LED=P1^7;            			//指示燈
sbit   AN=P1^6;            			//執(zhí)行
sbit   STOP=P1^5;            			//復(fù)位
sbit   PR=P1^4;            				//PR=1錄音，PR=0放音
sbit   INT=P3^4;            			//中斷

void   YS50();
void   ISDX(unsigned char d);
void   UP();
void   STOPP();
void   DSTOP();
	
main()
{
    unsigned char delay;        			//延時(shí)參數(shù)
    unsigned char isdl,isdh;    			//ISD高低位
    unsigned char n1;
	
    SP=0x10;
    P0=0xFF;
    P1=0xFF;
    P2=0xFF;
    P3=0xFF;
    EA=0;
lab1:
    LED=1;                       			//關(guān)指示燈
    DSTOP();                     			//ISD掉電
    delay=200;
    while(AN);                   			//等按AN鍵
    while(delay--);              			//延時(shí)
    UP();                        				//ISD上電
    isdl=isdh=0;                 			//ISD高低位地址置0
    if(PR)                       				//PR=1 錄音
    {
ISDX(isdl);
ISDX(isdl);
ISDX(isdh);
SS=1;
b1:
       n1=10;
        while(n1--)
      YS50();
LED=0;
ISDX(0xB0);
SS=1;
if(INT)
{
while(!AN);
n1=200;
while(n1--);
LED=1;                    		//關(guān)指示燈
STOPP();                  		//停止當(dāng)前操作
if(STOP)
{
while(!AN);
STOPP();
goto b1;
}
}
else
{
b2:
LED=1;
n1=15;
while(!AN)
{
while(!n1--)
YS50();
LED=0;
n1=15;
while(!AN)
{
while(!n1--)
YS50();
goto b2;
}
}
}
}
else                         			//PR=0 放音
{
while(!AN);
ISDX(isdl);
ISDX((isdh|0xE0)&0xE7);
SS=1;
b3:
LED=0;
ISDX(0xF0);
SS=1;
if(STOP)
{
while(INT);
LED=1;
STOPP();
SS=0;
SCLK=0;
SCLK=1;
if(!MISO)
{
SCLK=0;
SS=1;
STOPP();
if(STOP)
{
while(!AN);
goto b3;
}
}
}
}
SCLK=0;
SS=1;
STOPP();
goto lab1;
}

/*ISD4004芯片驅(qū)動(dòng)*/
/********************************50mS延時(shí)*********************************/
void  YS50()
{
TMOD=1;
TH0=0x3C;                			//50mS延時(shí)初值置入
TL0=0xB0;
TR0=1;
while(!TF0);
TF0=0;
TR0=0;
}
/*ISD3300.4003 SPI寫入程序*/
void  ISDX(unsigned char d)
{
unsigned char i,j;
SS=0;                      			//開片選
SCLK=0;                    			//時(shí)鐘SCLK=0
j=d;
for(i=0;i<8;i++)
{
if(j&0x01)               			//數(shù)據(jù)寫 MOSI
MOSI=1;
else
MOSI=0;
SCLK=1;                  			//時(shí)鐘SCLK=1
j=j>>1;
SCLK=0;                  			//時(shí)鐘SCLK=0
}
}

/*ISD上電*/
void  UP()
{
ISDX(20);                 			//發(fā)00100XXXXXXXXXXX
SS=1;                     			//關(guān)片選
YS50();                   			//50mS延時(shí)
YS50();                   			//50mS延時(shí)
}

/*停止當(dāng)前操作*/
void  STOPP()
{
ISDX(30);                 			//發(fā) 0X110XXX
SS=1;                     			//關(guān)片選
YS50();                   			//50mS延時(shí)
YS50();                   			//50mS延時(shí)
}

/*停止當(dāng)前操作掉電*/
void  DSTOP()
{
ISDX(10);                 			//發(fā)0X010XXXXXXXXXX
SS=1;                     			//關(guān)片選
YS50();                   			//50mS延時(shí)
YS50();                   			//50mS延時(shí)
}