/*  STM32F103C8T6 智能路灯四合一仿真  */
#include <Arduino.h>

#define PIR_PIN       PA2
#define LDR_PIN       PA0
#define LED_PWM_PIN   PA8
#define VOLT_PIN      PA1
#define CURR_PIN      PA3

const int LIGHT_DAY   = 5000;   // lux
const int LIGHT_NIGHT = 1000;
const float V_SCALE   = 4.0f;   // 12 V → 3.3 V
const float ACS_SENS  = 0.066f;
const float ACS_ZERO  = 2.5f;

int   lux, pwmDuty;
bool  human;
float voltage, current, power, energy;
unsigned long lastPrint, lastE;

void setup() {
  Serial.begin(115200);
  pinMode(PIR_PIN, INPUT_PULLDOWN);
  pinMode(LED_PWM_PIN, OUTPUT);
  analogWriteFrequency(1000);                // ← 修正：只传 1 个参数
  analogWrite(LED_PWM_PIN, 0);
  energy = 0;
  lastPrint = lastE = millis();
}

void loop() {
  readSensors();
  adaptiveDimming();
  energyCompute();
  if (millis() - lastPrint >= 2000) {
    lastPrint = millis();
    printStatus();
  }
  delay(100);
}

/*---------- 传感器采集 ----------*/
void readSensors() {
  human = digitalRead(PIR_PIN);

  int rawL = analogRead(LDR_PIN);              // 0-4095
  lux = map(rawL, 0, 4095, 100000, 0);

  int rawV = analogRead(VOLT_PIN);
  voltage = rawV * (3.3f / 4095.0f) * V_SCALE;

  int rawC = analogRead(CURR_PIN);
  float cV = rawC * (3.3f / 4095.0f);
  current = (cV - ACS_ZERO) / ACS_SENS;
  if (current < 0) current = 0;
}

/*---------- 自适应调光 ----------*/
void adaptiveDimming() {
  int level;
  if (lux > LIGHT_DAY)        level = 0;
  else if (lux > LIGHT_NIGHT) level = human ? 6 : 2;
  else                        level = human ? 10 : 6;

  pwmDuty = (level * 255) / 10;
  if (pwmDuty > 255) pwmDuty = 255;
  analogWrite(LED_PWM_PIN, pwmDuty);
}

/*---------- 能耗累计 ----------*/
void energyCompute() {
  power = voltage * current;
  unsigned long dt = millis() - lastE;
  if (dt >= 1000) {
    energy += (power * dt) / 3600000.0f;   // Wh
    lastE = millis();
  }
}

/*---------- 串口输出 ----------*/
void printStatus() {
  Serial.print("Lux=");      Serial.print(lux);
  Serial.print(" Human=");   Serial.print(human ? "YES" : "NO");
  Serial.print(" PWM=");     Serial.print(pwmDuty);
  Serial.print(" U=");       Serial.print(voltage, 1); Serial.print("V");
  Serial.print(" I=");       Serial.print(current, 2); Serial.print("A");
  Serial.print(" P=");       Serial.print(power, 1);   Serial.print("W");
  Serial.print(" E=");       Serial.print(energy, 3);  Serial.println("Wh");
}