介紹一個個人編寫的滑動濾波函數：
#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; 函數原型： void hOverHeat_vMovFilter(INT16U sampData, T_OHG_FILTER_TYP *pMovFliterObj, INT16U *pBuf)
{
pMovFliterObj->u32_mDataSum += sampData;
pBuf[pMovFliterObj->u8_mBufIndex] = sampData; pMovFliterObj->u8_mBufIndex = (INT8U)((pMovFliterObj->u8_mBufIndex + OHG_BUF_IDX_MOV_STEP) % (pMovFliterObj->u8_mSampFactor));
if (pMovFliterObj->u8_mBufFullFlg != OHG_BUF_FLG_NOT_FULL)
{
pMovFliterObj->u32_mDataSum -= pBuf[pMovFliterObj->u8_mBufIndex];
pMovFliterObj->u16_mFilterRult = (INT16U)(pMovFliterObj->u32_mDataSum / (pMovFliterObj->u8_mSampFactor));
}
else
{
if (pMovFliterObj->u8_mBufIndex == OHG_BUF_IDX_RESET)
{
pMovFliterObj->u8_mBufFullFlg = OHG_BUF_FLG_FULL;
pMovFliterObj->u16_mFilterRult = (INT16U)(pMovFliterObj->u32_mDataSum / (pMovFliterObj->u8_mSampFactor));
}
else
{
pMovFliterObj->u16_mFilterRult = (INT16U)(pMovFliterObj->u32_mDataSum / pMovFliterObj->u8_mBufIndex);
}
}
} 用法： 1：定義對象和軟件緩沖區： static T_OHG_FILTER_TYP STC_CurMovFilterObj; #define OHG_CUR_SAMP_FACTOR 10u
static INT16U hOverHeat_aCurFilterBuf[OHG_CUR_SAMP_FACTOR]; 2：初始化對象 for(i=0; i
{
hOverHeat_aCurFilterBuf = 0U;
}
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：周期調用濾波函數： hOverHeat_vMovFilter(((INT16U)MotorActualCur), &STC_CurMovFilterObj, hOverHeat_aCurFilterBuf); 4：需要時讀取結果： hOverHeat_u16SysCurrent = STC_CurMovFilterObj.u16_mFilterRult;
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