2553驱动bh1750,硬件i2c，停止在一个地方

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chuandaoxy| 中级工程师

楼主 | 2021-12-21 20:38 | 只看该作者回帖奖励

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一直停在这while((IFG2 & UCB0TXIFG)==0);       // UCB0TXIFG is set when UCB0TXBUF is empty
这是神魔情况，网上很多人提过，但是没有看到解决方法，硬件i2c的问题

void I2C_WriteData(uint8 data)
{
      I2C_Init(Master,SMCLK);
      i2c_delay_ms(1);
      while((UCB0CTL1 & UCTXSTP));       // 确保总线空闲
      UCB0CTL1 |= UCTR + UCTXSTT;    // I2C TX, start condition
      while((IFG2 & UCB0TXIFG)==0);       // UCB0TXIFG is set when UCB0TXBUF is empty.
      UCB0TXBUF = SlaveAddress;             // Load TX buffer
   while((IFG2 & UCB0TXIFG)==0);       // UCB0TXIFG is set when UCB0TXBUF is empty.
      UCB0TXBUF = data;
      while((IFG2 & UCB0TXIFG)==0);       // UCB0TXIFG is set when UCB0TXBUF is empty.
      UCB0CTL1 |= UCTXSTP;                // I2C stop condition
      i2c_delay_ms(1);
}

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