#include  

#define OP_READ 0xa1                    //器件地址读  

#define OP_WRITE 0xa0                   //器件地址写  

#define uchar unsigned char  

#define uint unsigned int   

#define SDA_OUT P1DIR |= BIT3  

#define SDA_IN P1DIR &= ~BIT3  

#define SCL_OUT P1DIR |= BIT2  

#define SCL_IN P1DIR &= ~BIT2  

#define SDA_H P1OUT |= BIT3  

#define SDA_L P1OUT &= ~BIT3  

#define SCL_H P1OUT |= BIT2  

#define SCL_L P1OUT &= ~BIT2  

#define wei_h P5OUT |= BIT5  

#define wei_l P5OUT &= BIT5  

#define duan_l P6OUT &= ~BIT6  

#define duan_h P6OUT |= BIT6  

uchar table[16] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};  

uchar miao;  

uchar write;  

int num;  

void delayus(uint z)  

{  

  uint i,j;  

  for(i = 0;i<20;i++)  

    for(j=0;j

    {;;};  

}  

void start()  

{  

  SDA_OUT;  

  SCL_OUT;  

  SDA_H;  

  SCL_H;  

  delayus(1);  

  SDA_L;  

  delayus(2);  

  SCL_L;  

}  

void stop()  

{  

  SDA_OUT;  

  SCL_OUT;  

  SDA_L;  

  delayus(2);  

  SCL_H;  

  delayus(2);  

  SDA_H;  

}  

void Ack24()  

{  

  SDA_OUT;  

  SCL_OUT;  

  SDA_H;  

  SCL_H;  

  delayus(2);  

  SDA_IN;  

  while(P1IN & BIT3)  

      SCL_L;  

  delayus(2);  

}  

//mcu读取数据  

uchar read_byte()  

{  

  uchar i,read_data;  

  SDA_OUT;  

  SCL_OUT;  

  for(i = 0;i<8;i++)  

  {  

    SDA_H;  

    delayus(1);  

    SCL_H;  

    SDA_IN;  

    read_data <<= 1;  

    if(P1IN & BIT3)  

      read_data |= 0x01;  

      SDA_OUT;  

      SCL_L;     

  }  

  return(read_data);  

}  

void write_byte(uint dat)  

{  

  uchar i;  

  SDA_OUT;  

  SCL_OUT;  

  for(i = 0;i<8;i++)  

  {  

    if(dat&0x80)  

      SDA_H;  

    else  

      SDA_L;   

    delayus(2);  

    SCL_H;  

    delayus(2);  

    SCL_L;  

    delayus(2);  

    dat <<= 1;  

  }  

  SCL_L;  

  delayus(2);  

  SDA_H;  

  delayus(2);  

}  

//向指定地址写数据  

void write_dat(uchar addr,uchar write_data)  

{  

  SDA_OUT;  

  SCL_OUT;  

  SDA_H;  

  SCL_H;  

  start();  

  write_byte(OP_WRITE);  

  Ack24();  

  write_byte(addr);  

  Ack24();  

  write_byte(write_data);  

  Ack24();  

  stop();  

  delayus(1000);  

}  

//从指定地址读数据  

uchar read_random(uint random_addr)  

{  

  uchar i;  

  SDA_OUT;  

  SCL_OUT;  

  SDA_H;  

  SCL_H;  

  start();  

  write_byte(OP_WRITE);  

  Ack24();  

  write_byte(random_addr);  

  Ack24();  

  start();  

  write_byte(OP_READ);  

  Ack24();  

  i = read_byte();  

  stop();  

  return i;  

}  

void display(uchar dat)  

{  

  P4OUT = table[dat];  

  duan_h;  

  duan_l;  

  P4OUT = ~(1 << num);  

  wei_h;  

  wei_l;  

}  

void Clock(void)  

{  

  miao++;  

  if(miao==10)  

    miao=0;  

}  

void main( void )  

{  

  P1DIR = 0XFF,P1OUT = 0XFF;  

  P2DIR = 0XFF,P2OUT = 0XFF;  

  P3DIR = 0XFF,P3OUT = 0XFF;  

  P4DIR = 0XFF,P4OUT = 0XFF;  

  P5DIR = 0XFF,P5OUT = 0XFF;  

  P6DIR = 0XFF,P6OUT = 0XFF;  

  SDA_OUT;  

  SCL_OUT;  

  SDA_H;  

  SCL_L;  

  // Stop watchdog timer to prevent time out reset  

  WDTCTL = WDTPW + WDTHOLD;  

  CCR0 = 32768 -1;  

  TACTL = TASSEL_1 + MC_1;  

  CCTL0 |= CCIE;  

  _EINT();  

  miao = read_random(3);  

  if(miao>9) miao=0;  

  while(1)  

  {  

    display(miao);  

    if(write==1)  

    {  

      write = 0;  

      write_dat(3,miao);  

    }  

    LPM3;  

  }  

}  

#pragma vector = TIMERA0_VECTOR  

__interrupt void TimerA_ISR(void)  

{  

  Clock();  

  write = 1;  

  LPM3_EXIT;  

}