51 MCU + ISD4002 voice chip reading and writing source code-EEWORLD

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#include

#define uchar unsigned char

#define uint unsigned int

sbit SS=P2^3; //Enable control port

sbit SCLK=P2^2;

sbit MOSI=P2^0;

sbit MISO=P2^1;

sbit LED=P1^0;

sbit PR=P1^1; //Recording and playback control terminal, adjusted by switch, high level means recording state

sbit ISD_INT=P1^2; // Overflow interrupt

sbit AN=P2^4;

sbit STOP=P2^5;

void delay(uint time)

{

while(time!=0)

{

time--;

}

void delayms(uint time)

{

TMOD=0x01;

for(time;time>0;time--)

{

TH0=0xfc;

TL0=0x18;

TR0=1;

while(TF0!=1)

{;}

TF0=0;

TR0=0;

}

void spi_send(uchar isdx)

{

uchar isx_counter;

SS=0;

SCLK=0;

for(isx_counter=0;isx_counter<8;isx_counter++)

{

if((isdx&0x01)==1)

SMOKE=1;

else

SMOKE=0;

isdx=isdx>>1;

SCLK=1;

delay(2);

SCLK=0;

delay(2);

}

void isd_stop(void)

{

delay(10);

spi_send(0x30); //stop recording and playback

SS=1; // Voice chip is not enabled

delayms(50);

}

void isd_pu(void)

{

delay(10);

SS=0; //Voice chip is enabled

spi_send(0x20); //The voice chip enters standby mode

SS=1;

delayms(50);

}

void isd_pd(void)

{

delay(10);

spi_send(0x10); //The chip stops this operation and enters power saving mode

SS=1;

delayms(50);

}

void isd_play(void)

{

LED=0;

spi_send(0xf0); //Start playing at the next address

SS=1;

}

void isd_rec(void)

{

LED=0;

spi_send(0xb0); //Start recording at the next address

SS=1;

}

void isd_setplay(fly adl,fly adh)

{

spi_send(adl);

adh=adh|0xe0;

spi_send(adh);

SS=1;

}

void isd_setrec(uchar adl,uchar adh)

{

spi_send(adl);

adh=adh|0xa0;

spi_send(adh);

SS=1;

}

void isd_overflow(void)

{

while(AN==0)

{

LED=1;

delayms(300);

LED=0;

delayms(300);

}

fly chk_isdovf(void)

{

SS=0;

delay(2);

SCLK=0;

delay(2);

SCLK=1;

SCLK=0;

delay(2);

if(MISO==1)

{

SCLK=0;

SS=1;

isd_stop();

return 1;

}

else

{

SCLK=0;

SS=1;

isd_stop();

return 0;

}

void main()

{

flying ovflag;

while(1)

{

P0=P1=P2=P3=0xff;

while(AN==1)

{

if(AN==0)

{

delayms(20);

}

isd_pu();

isd_pd();

isd_pu();

if(PR==1)

{

delayms(500);

isd_setrec(0x00,0x00);

{

isd_rec();

delay(20);

while(AN==0)

{

if(ISD_INT==0)//Judge the interrupt output (open drain output). When the memory overflows or the playback end mark appears, this terminal is low level and remains

isd_overflow(); //LED flashes when the chip overflows

}

if(ISD_INT==0)

break;

LED=1;

isd_stop();

while(AN==1)

{

if(STOP==0)

break;

if(AN==0)

delayms(500);

}

}while(AN==0);

}

else

{

while(AN==0)

{;}

isd_setplay(0x00,0x00);

{

isd_play();

delay(20);

while(ISD_INT==1)

{;}

LED=1;

isd_stop();

if(ovflog=chk_isdovf())

break;

while(AN==1)

{

if(STOP==0)

delayms(20);

if(STOP==0)

break;

if(AN==0)

delayms(20);

}

LED=0;

}while(AN==0);

}

isd_stop();

isd_pd();

}

Keywords：MCU ISD4002 Reference address：51 MCU + ISD4002 voice chip reading and writing source code

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