I2C1SCLH = (Fpclk/400000 + 1) / 2; // 设定I2C1时钟 200KHz <br />I2C1SCLL = (Fpclk/400000)/2;<br />在I2C1SCLH = (Fpclk/400000 + 1) / 2;里,为什么是Fpclk/400000 + 1而不是Fpclk/400000?<br />这样设置的I2C时钟频率应该是400Kb/s吧? |
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