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在ADC模块初始化程序InitAdc()中，有一段程序是DSP28x_usDelay(((((long double) A * 1000.0L) / (long double)CPU_RATE) - 9.0L) / 5.0L)
((ADC_usDelay * 1000.0L)/CPU_RATE -9.0L)/5.0L
请问一下，这个宏分子分母都表示什么意思啊？ 怎么能保证准确的延迟？
谢谢了
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