PIC16F1937的硬件I2C主模式的写数据问题！！！

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WalKerOne| 高级技术员

楼主 | 2011-7-1 19:27 | 只看该作者回帖奖励

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I2c, 硬件, pic16f1937, ST, While

求大家帮我看看下面这个程序（PIC16F1937作为I2C主节点向PCF8576D写数据，显示不正确），我按照应用笔记上的时序操作的，但是有问题，不知道问题出在哪？要延时还是怎么的？各位大侠有调试通过了的C语言的硬件I2C主模式的写程序吗？能否提供我一份，非常感谢！

uchar DisBuf[19] = {0xcf,0xcf,0xcf,0xcf,0xcf,0xcf,0xcf,0xcf,0xcf,0xcf,0xcf,0xcf,0xcf,0xcf,0xcf,0xcf,0xcf,0xcf,0xcf};

void main()
{

OSCCON = 0x7a; // INTOSCIO, PLL disabled, Fosc = 16MHz

PORTC = 0x60;
LATC = 0x60;
TRISC = 0x9e;       // SCL and SDA is input

SSPADD = 0x09;    // 0x09 for 400kHz at 16MHz
SSPSTAT = 0x00; // Enable High speed 400kHz slew rate control
SSPCON1 = 0x28;  // Enable I2C Master initially
SSPCON2 = 0x00;  // Clear control bits
SSPCON3 = 0x08;  // Disable all interrupt of I2C Master, keep 300ns on SDA after SCL's falling edge

While(1){
      SEN = 1;
      while(SEN);
      SSPBUF = PCF8576D_Addr & 0xfe;
      while(ACKSTAT);
      SSPBUF = 0xe0;
      while(ACKSTAT);
      SSPBUF = 0xc8;
      while(ACKSTAT);
      SSPBUF = 0x00;
      while(ACKSTAT);
      for(i=0;i<19;i++){
         SSPBUF = DisBuf;
         while(ACKSTAT);
      }
      PEN = 1;
      while(PEN);
}
}

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