// LightControl.cpp #include "LightControl.h" #include "Arduino.h" LightControl::LightControl(BH1750& sensor, DS3502& pot) : lightSensor(sensor), digitalPot(pot) {} void LightControl::setTargetLight(float target) { targetLightLevel = target; } float LightControl::getCurrentLight() { return lightSensor.readLightLevel(); } void LightControl::runUntilTargetReached(float target, int maxAttempts) { const float tolerance = 100.0f; // 容许误差范围(±100 lux) float currentLight; float res; int attempt = 0; const int max_retries = maxAttempts; // 最大尝试次数,防止死循环 do { currentLight = getCurrentLight(); res = target - currentLight; if (abs(res) <= tolerance) { Serial.println("Target reached."); break; } int lastWiperValue = digitalPot.getWiper(); if (res > 0) { // 需要增加亮度 -> 增加电位器阻值 if (lastWiperValue <= 127) { lastWiperValue++; } } else if (res < 0) { // 需要减少亮度 -> 减少电位器阻值 if (lastWiperValue > 0) { lastWiperValue--; } } digitalPot.setWiper(lastWiperValue); Serial.printf("Current light: %.0f, Target: %.0f, Res: %.0f, Wiper: %d\n", currentLight, target, res, lastWiperValue); delay(200); // 等待响应,必要!! attempt++; // 超出最大尝试次数退出 if (attempt >= max_retries) { Serial.println("Max attempts reached. Exiting..."); break; } } while (true); }