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59 lines
1.6 KiB
59 lines
1.6 KiB
3 weeks ago
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/*
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* bsp_slide_averager.c
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*
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* Created on: 2026年3月20日
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* Author: L1ng the codeGod
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include "bsp_slide_averager.h"
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// 滑动均值配置（按需修改）
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#define WINDOW_SIZE 5 // 窗口长度
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/**
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* @brief 初始化滑动均值的核心变量（替代结构体初始化）
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* @param buffer: 窗口缓冲区（外部定义的数组）
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* @param p_index: 指向当前写入索引的指针（外部定义的变量）
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* @param p_count: 指向有效数据计数的指针（外部定义的变量）
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*/
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void slide_averager_init(float buffer[], uint8_t *p_index, uint8_t *p_count) {
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// 清空缓冲区
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for (uint8_t i = 0; i < WINDOW_SIZE; i++) {
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buffer[i] = 0.0f;
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}
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// 初始化索引和计数
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*p_index = 0;
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*p_count = 0;
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}
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/**
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* @brief 添加新数据并计算滑动均值（无结构体，全传参）
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* @param buffer: 窗口缓冲区（外部数组）
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* @param p_index: 当前写入索引（指针）
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* @param p_count: 有效数据计数（指针）
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* @param new_data: 新增原始数据
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* @retval 当前滑动均值
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*/
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float slide_averager_calc(float buffer[], uint8_t *p_index, uint8_t *p_count, float new_data) {
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// 1. 存入新数据（覆盖最旧数据）
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buffer[*p_index] = new_data;
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// 2. 更新索引（循环滑动）
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*p_index = (*p_index + 1) % WINDOW_SIZE;
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// 3. 更新有效数据计数（窗口未满时累加）
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if (*p_count < WINDOW_SIZE) {
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(*p_count)++;
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}
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// 4. 计算均值
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float sum = 0.0f;
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for (uint8_t i = 0; i < *p_count; i++) {
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sum += buffer[i];
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}
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return sum / *p_count;
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}
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