初始化提交

2024-07-20 22:09:06 +08:00
commit c247dd07a6
6876 changed files with 2743096 additions and 0 deletions
--- a/arduino-cli/libraries/thermistor/thermistor.cpp
+++ b/arduino-cli/libraries/thermistor/thermistor.cpp
@@ -0,0 +1,129 @@
+/**
+ * Copyright (c) 2014 panStamp <contact@panstamp.com>
+ * 
+ * This file is part of the panStamp project.
+ * 
+ * panStamp  is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * any later version.
+ * 
+ * panStamp is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with panStamp; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 
+ * USA
+ * 
+ * Author: Daniel Berenguer
+ * Creation date: 11/05/2014
+ *
+ * This library simplifies the use of NTC thermistors by using Steinhart
+ * simplified formula.
+ * http://en.wikipedia.org/wiki/Steinhart%E2%80%93Hart_equation
+ *
+ * Based on procedure explained by Adafruit:
+ * https://learn.adafruit.com/thermistor/using-a-thermistor
+ *
+ * This library works only with the following circuit topology
+ *
+ * Vcc---NTC---ADC---SERIES_RESISTOR---GND
+ */
+
+#include "thermistor.h"
+#include "HardwareSerial.h"
+// Temperature for nominal resistance (almost always 25 C)
+#define TEMPERATURENOMINAL 25
+
+// Number of ADC samples
+#define NUMSAMPLES         5 
+
+// ADC resolution
+#if defined(PANSTAMP_NRG) || defined(ESP_PLATFORM)
+#define ADC_RESOLUTION 0xFFF
+#else
+#define ADC_RESOLUTION 1023
+#endif
+#define VERBOSE_SENSOR_ENABLED 1
+/**
+ * THERMISTOR
+ * 
+ * Class constructor
+ *
+ * @param adcPin Analog pin where the thermistor is connected
+ * @param nomRes Nominal resistance at 25 degrees Celsius
+ * @param bCoef beta coefficient of the thermistor
+ * @param serialRes Value of the serial resistor
+ */
+THERMISTOR::THERMISTOR(uint8_t adcPin, uint16_t nomRes, uint16_t bCoef, uint16_t serialRes) 
+{
+  analogPin = adcPin;
+  nominalResistance = nomRes;
+  bCoefficient = bCoef;
+  serialResistance = serialRes;
+}
+
+/**
+ * read
+ *
+ * Read temperature from thermistor
+ *
+ * @return temperature in 0.1 ºC
+ */
+int THERMISTOR::read(void)
+{
+  uint8_t i;
+  uint16_t sample;
+  float average = 0;
+
+  #ifndef ESP_PLATFORM
+  analogReference(DEFAULT);
+  #endif
+
+  // take N samples in a row, with a slight delay
+  for (i=0; i< NUMSAMPLES; i++)
+  {
+    sample = analogRead(analogPin);
+    average += sample;
+    delay(10);
+  }
+  average /= NUMSAMPLES;
+
+  #ifdef VERBOSE_SENSOR_ENABLED  
+  Serial.print("Average analog reading "); 
+  Serial.println(average);
+  #endif
+ 
+  // convert the value to resistance
+  average = ADC_RESOLUTION / average - 1;
+  average = serialResistance * average;
+
+  #ifdef VERBOSE_SENSOR_ENABLED
+  Serial.print("Thermistor resistance "); 
+  Serial.println(average);
+  #endif
+ 
+  float steinhart;
+  steinhart = average / nominalResistance;     // (R/Ro)
+  #ifdef PANSTAMP_NRG
+  steinhart = logf(steinhart);                 // ln(R/Ro)
+  #else
+  steinhart = log(steinhart);                  // ln(R/Ro)
+  #endif
+  steinhart /= bCoefficient;                   // 1/B * ln(R/Ro)
+  steinhart += 1.0 / (TEMPERATURENOMINAL + 273.15); // + (1/To)
+  steinhart = 1.0 / steinhart;                 // Invert
+  steinhart -= 273.15;                         // convert to C
+ 
+  #ifdef VERBOSE_SENSOR_ENABLED
+  Serial.print("Temperature "); 
+  Serial.print(steinhart);
+  Serial.println(" *C");
+  #endif
+  
+  return (int)(steinhart * 10);
+}
+