#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <stdbool.h>// 定義常量
#define LOW_COOK_WINDOW_SIZE 20                        // 滑動窗口大小，10個樣本點（10秒）
#define LOW_COOK_SLOPE_THRESHOLD 0.12f                 // 斜率平緩的閾值
#define LOW_COOK_SAMPLE_INTERVAL 10                    // 采樣間隔，單位為100ms
#define LOW_COOK_DEFAULT_TIME_DIFFERENCE 10.0f         // 默認時間間隔為10秒
#define MIN_TIME_DIFFERENCE 1.0f                       // 最小時間間隔為1秒
#define MAX_TIME_DIFFERENCE (LOW_COOK_WINDOW_SIZE - 1) // 最大時間間隔為窗口大小減1// 定義加熱系統結構
typedef struct
{float slope;float data[LOW_COOK_WINDOW_SIZE]; // 滑動窗口數據unsigned char count;              // 當前樣本數量bool slope_event;                 // 斜率事件unsigned char tim_count;          // 時間片計數器unsigned char state;              // 狀態機unsigned char slope_status;       // 狀態
} low_cook_heating_system_t;// 全局變量
low_cook_heating_system_t low_cooksystem;// 初始化加熱系統
void low_cook_init_heating_system(low_cook_heating_system_t *system)
{system->slope = 0.0f;system->tim_count = 0;system->state = 0;system->count = 0;system->slope_event = false;system->slope_status = 1; // 樣本不足for (unsigned char i = 0; i < LOW_COOK_WINDOW_SIZE; i++){system->data[i] = 0.0f;}
}// 添加樣本點到滑動窗口，100ms調用一次，1S存數據一次
void low_cook_add_sample(low_cook_heating_system_t *system, float temperature)
{if (++system->tim_count < LOW_COOK_SAMPLE_INTERVAL){return;}system->tim_count = 0;if (system->count < LOW_COOK_WINDOW_SIZE){// 如果窗口未滿，直接添加到末尾system->data[system->count++] = temperature;}else{// 如果窗口已滿，丟棄最舊的數據，將最新的數據添加到最后的位置for (unsigned char i = 1; i < LOW_COOK_WINDOW_SIZE; i++){system->data[i - 1] = system->data[i];}system->data[LOW_COOK_WINDOW_SIZE - 1] = temperature;}
}// 計算溫度斜率
float low_cook_calculate_slope(low_cook_heating_system_t *system, float time_difference)
{// 限制 time_difference 在合理范圍內if (time_difference < MIN_TIME_DIFFERENCE || time_difference > MAX_TIME_DIFFERENCE){system->slope_status = 2; // 時間間隔超出范圍return 0.0f;}unsigned char interval_samples = (unsigned char)(time_difference); // 計算需要的樣本間隔if (system->count < LOW_COOK_WINDOW_SIZE || interval_samples >= system->count){system->slope_status = 1; // 樣本不足return 0.0f;}// 獲取最新樣本點和 interval_samples 前的樣本點float current = system->data[system->count - 1];float previous = system->data[system->count - 1 - interval_samples];system->slope_status = 0; // 成功計算斜率// 計算并返回斜率return (current - previous) / time_difference;
}void low_cook_update_slope(float time_difference)
{// 添加新的溫度數據到系統中low_cook_add_sample(&low_cooksystem, stheat.temperature);// 計算斜率low_cooksystem.slope = low_cook_calculate_slope(&low_cooksystem, time_difference);if ((low_cooksystem.slope_status == 0) && (stheat.temperature > 35)){// 判斷斜率是否平緩low_cooksystem.slope_event = (fabsf(low_cooksystem.slope) < LOW_COOK_SLOPE_THRESHOLD);}
}