关于采样，程序中通过采样值计算实际值这块，花费时间较多，有什么可以优化的方法吗？尽量缩短计算时间。
wSampleReal = (int)((long)(wSample - 465) * 5505 >> 9);
dwSumTemp += (INT32S)abs(wSampleReal);
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MSP430F2252 AD采样
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