针对16位非负数的滑动滤波函数_Andy_Issta_新浪博客

介绍一个个人编写的滑动滤波函数：

#define OHG_BUF_IDX_MOV_STEP          1U
#define OHG_BUF_FLG_FULL              1U
#define OHG_BUF_FLG_NOT_FULL          0U
#define OHG_BUF_IDX_RESET             0U

typedef struct _T_OHG_FILTER
{
    INT16U u16_mFilterRult;
    INT32U u32_mDataSum;
    INT8U  u8_mBufIndex;
    INT8U  u8_mBufFullFlg;
    INT8U  u8_mSampFactor;
}T_OHG_FILTER_TYP; 

函数原型：

void MovingFilter(uint16_t sampData, T_ATE_FILTER_TYP *pMovFliterObj, uint16_t *pBuf)
{
    pMovFliterObj->u32_mDataSum += sampData;

    if (pMovFliterObj->u8_mBufFullFlg != FILTER_BUF_FLG_UNDF)                  
    {
        pMovFliterObj->u32_mDataSum -= pBuf[pMovFliterObj->u8_mBufIndex];
        pMovFliterObj->u16_mFilterRult = (uint16_t)(pMovFliterObj->u32_mDataSum / (pMovFliterObj->u8_mSampFactor));
       
       
        pBuf[pMovFliterObj->u8_mBufIndex] = sampData;
        pMovFliterObj->u8_mBufIndex = (uint8_t)((pMovFliterObj->u8_mBufIndex + FILTER_IDX_MOV_STEP) % (pMovFliterObj->u8_mSampFactor));
        
    }
    else
    {
        pBuf[pMovFliterObj->u8_mBufIndex] = sampData;

        pMovFliterObj->u8_mBufIndex += FILTER_IDX_MOV_STEP;

        if (pMovFliterObj->u8_mBufIndex == pMovFliterObj->u8_mSampFactor)
        {
            pMovFliterObj->u8_mBufIndex = FILTER_BUF_IDX_CLAR; 
            pMovFliterObj->u8_mBufFullFlg = FILTER_BUF_FLG_FULL;                    
            pMovFliterObj->u16_mFilterRult = (uint16_t)(pMovFliterObj->u32_mDataSum / (pMovFliterObj->u8_mSampFactor));
        }
        else                                                                     
        {
            pMovFliterObj->u16_mFilterRult = (uint16_t)(pMovFliterObj->u32_mDataSum / pMovFliterObj->u8_mBufIndex);
        }
    }
   
    
}

    STC_CurMovFilterObj.u16_mFilterRult = 0U;
   
    STC_CurMovFilterObj.u32_mDataSum = 0U;
   
    STC_CurMovFilterObj.u8_mBufIndex = OHG_BUF_IDX_RESET;
    STC_CurMovFilterObj.u8_mBufFullFlg = OHG_BUF_FLG_NOT_FULL;
   
    STC_CurMovFilterObj.u8_mSampFactor = OHG_CUR_SAMP_FACTOR;

3：周期调用滤波函数：

hOverHeat_vMovFilter(((INT16U)MotorActualCur), &STC_CurMovFilterObj, hOverHeat_aCurFilterBuf);

4：需要时读取结果：

hOverHeat_u16SysCurrent = STC_CurMovFilterObj.u16_mFilterRult;

5：简单测试：

int main(array ^args)
{
    UInt16 InputSampData = 0;

    //Console::WriteLine(L"Hello World");

    MovingFilterObjInit();

    while(1)
    {
       cin >> InputSampData;

       MovingFilter(InputSampData, &FogCapMovFilterObj, FogCapFilterBuf);

       Console::WriteLine("---{0}", FogCapMovFilterObj.u16_mFilterRult);
       Console::WriteLine("------{0}  {1}  {2}  {3}", FogCapFilterBuf[0], FogCapFilterBuf[1], FogCapFilterBuf[2], FogCapFilterBuf[3]);
    }

    return 0;
}