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TimerOverflowTimerOverflow
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Merge pull request #1 from TimerOverflow/modify
20171017
2 parents 5461fd3 + 0c8a9a5 commit a85475b

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‎DataSampling.c

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/*********************************************************************************/
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/*
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* Author : Jeong Hyun Gu
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* File name : DataSampling.c
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*/
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/*********************************************************************************/
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#include <stdlib.h>
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#include "DataSampling.h"
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/*********************************************************************************/
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#if(DATA_SAMPLING_REVISION_DATE != 20171017)
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#error wrong include file. (DataSampling.h)
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#endif
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/*********************************************************************************/
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/** Global variable **/
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/*********************************************************************************/
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/*
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1) 인수
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- Smp : tag_DataSampling 인스턴스의 주소.
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- Data : 버퍼를 채울 데이터.
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2) 반환
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- 없음.
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3) 설명
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- 인수로 전달받은 데이터로 버퍼를 채움.
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*/
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static void FillBuffer(tag_DataSampling *Smp, int Data)
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{
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int i;
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Smp->Sum = Smp->Index = 0;
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for(i = 0; i < Smp->Level; i++)
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{
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Smp->Buf[i] = Data;
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Smp->Sum += Data;
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}
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}
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/*********************************************************************************/
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/*
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1) 인수
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- Smp : tag_DataSampling 인스턴스의 주소.
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- BufSize : 동적할당 받을 버퍼의 크기.
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2) 반환
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- 0 : 초기화 실패.
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- 1 : 초기화 성공.
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3) 설명
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- 'tag_DataSampling' 인스턴스의 필수 초기화 실행.
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- DataSampling 모듈을 사용하기 위해 선행적 실행 필요.
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*/
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char DataSamplingInitGeneral(tag_DataSampling *Smp, int BufSize)
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{
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if(Smp->Bit.InitGeneral == true)
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{
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return true;
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}
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Smp->Buf = (int *) malloc(sizeof(int) * BufSize);
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if(Smp->Buf != null)
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{
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Smp->Level = Smp->BufSize = BufSize;
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Smp->Sum = Smp->Index = 0;
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Smp->Bit.InitGeneral = true;
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}
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return Smp->Bit.InitGeneral;
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}
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/*********************************************************************************/
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/*
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1) 인수
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- Smp : tag_DataSampling 인스턴스의 주소.
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- Level : 변경할 샘플링 수준.
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2) 반환
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- 없음.
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3) 설명
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- 샘플링 수준(Level) 변경.
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*/
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void DataSamplingChangeLevel(tag_DataSampling *Smp, int Level)
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{
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if((Smp->Bit.InitGeneral == false) || (Smp->Bit.InitFillBuffer == false))
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{
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return;
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}
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if((Smp->Level != Level) && (1 <= Level) && (Level <= Smp->Level))
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{
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Smp->Level = Level;
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FillBuffer(Smp, Smp->Buf[0]);
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}
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}
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/*********************************************************************************/
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/*
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1) 인수
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- Smp : tag_DataSampling 인스턴스의 주소.
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- Data : 데이터.
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2) 반환
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- Result : 샘플링된 데이터.
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3) 설명
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- ring buffer 형식으로 데이터를 입력 받아 평균을 내어 샘플링.
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*/
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int DataSamplingGetData(tag_DataSampling *Smp, int Data)
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{
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int Result;
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if(Smp->Bit.InitGeneral == false)
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{
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return 0;
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}
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if(Smp->Bit.InitFillBuffer == false)
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{
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Smp->Bit.InitFillBuffer = true;
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FillBuffer(Smp, Data);
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}
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Smp->Sum -= Smp->Buf[Smp->Index];
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Smp->Buf[Smp->Index] = Data;
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Smp->Sum += Smp->Buf[Smp->Index];
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Result = Smp->Sum / Smp->Level;
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if(++(Smp->Index) >= Smp->Level) Smp->Index = 0;
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return Result;
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}
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/*********************************************************************************/

‎DataSampling.h

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/*********************************************************************************/
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/*
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* Author : Jeong Hyun Gu
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* File name : DataSampling.h
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*/
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/*********************************************************************************/
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#ifndef __DATA_SAMPLING_H__
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#define __DATA_SAMPLING_H__
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/*********************************************************************************/
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#define DATA_SAMPLING_REVISION_DATE 20171017
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/*********************************************************************************/
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/** REVISION HISTORY **/
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/*
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2017. 10. 17. - 초기버전.
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Jeong Hyun Gu
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*/
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/*********************************************************************************/
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/**Define**/
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#define false 0
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#define true 1
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#define null 0
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/*********************************************************************************/
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/**Enum**/
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/*********************************************************************************/
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/**Struct**/
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typedef struct
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{
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struct
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{
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char InitGeneral : 1; //필수초기화
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char InitFillBuffer : 1; //버퍼초기화
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}Bit;
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int *Buf;
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int Index, BufSize, Level;
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long Sum;
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}tag_DataSampling;
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/*********************************************************************************/
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/**Function**/
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char DataSamplingInitGeneral(tag_DataSampling *Smp, int BufSize);
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void DataSamplingChangeLevel(tag_DataSampling *Smp, int Level);
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int DataSamplingGetData(tag_DataSampling *Smp, int Data);
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/*********************************************************************************/
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#endif //__DATA_SAMPLING_H__

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