speak.c

不少单片机C代码

#include <reg51.h>
#define uchar unsigned char
sbit P3_2=P3^2;
sbit P3_4=P3^4;
sbit P3_5=P3^5;

uchar read(void)
{ uchar a;
  P3_2=0;        /* to read */
  while(P3_4==1); /* ready? */
  a=P1;
  P3_2=1;
  return(a);
}

void  write(uchar od)
{ P1=od;
  P3_5=0;  /* to write */
  while(P3_4==1);
  P3_5=1;
  P1=0xff;
}

void send(uchar sdata)
{ do { 
    if((read()&0x40)!=0) write(sdata);
  } while ((read()&0x80)!=0);
}

void speak(sdatap)
uchar code *sdatap;
{  uchar  len;
   len=*sdatap;
   while((read()&0x80)!=0); /* to  read  station */
   write(0x60);    /* to  write  instruction */
   do {
     send(*(++sdatap));   /* to send data */
   }while(--len);
   len=9;
   do {
     send(0xff); /* end */
   }while(--len);
}

  uchar code qingjie[256]={0xb9,0x04,0xd8,0xcd,0x5d,
        0x01,0xe7,0x56,0x30,0x60,0xdf,0xaa,0x10,0xad,0x59,0xc3};
  uchar code beijing[256]={0xc0,0x25,0x2a,0xaa,0xd4,
        0xcc,0x13,0xb7,0x38,0xb9,0xd4,0xcc,0xaa,0x34,0x92,0x14};
  uchar code junqu[256]={0xc0,0x02,0x58,0x29,0x53,
        0x01,0x6b,0x4c,0x24,0xaf,0x27,0x21,0x89,0x58,0x3d,0xbc};
void main(void)
{  speak(qingjie);
   speak(beijing);
   speak(junqu);
}