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/*------------------------------------------------------------------------
* Function Name: sRMSCal
* Description: Calculate the RMS value of the AC sample
* Parameter: dwSum --- The squre sum of the AC sample
* dwRatio -- Q24 * dwRatio = Real value
* wFormat -- The float point
* -----------------------------------------------------------------------*/
int16 sRMSCal(long dwSum,long dwRatio,int wFormat)
{
_iq24 sqrt_in,sqrt_out;
long dwTemp;
int16 wTemp;
sqrt_in = (long)(dwSum/wSumCnt);
sqrt_out = _IQ24sqrt(sqrt_in);
dwTemp = _IQ7mpyIQX(sqrt_out,24,dwRatio,18);
wTemp = (int16)((long)dwTemp*wFormat>>7);
return wTemp;
}
