发动机测试采集卡问题分析

C++
#include <SD.h>
#include <HX711_ADC.h>
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
#if defined(ESP8266)|| defined(ESP32) || defined(AVR)
#include <EEPROM.h>
#endif
RF24 radio(6, 7);  // CE, CSN引脚
File file;
const byte address[6] = "0000";
const byte address2[6] = "Space.ST";
const int HX711_dout = 5;  //接HX711 dout
const int HX711_sck = 4;   //接 HX711 sck
HX711_ADC LoadCell(HX711_dout, HX711_sck);
const int calVal_calVal_eepromAdress = 0;
float a = 0;
float i;
int time = 0;
int period = 1000;
unsigned long timenow = 1000;
unsigned long time2 = 0;
void setup() {
  Serial.begin(115200);
  pinMode(3, INPUT_PULLUP);  //设置复位按键
  pinMode(8, OUTPUT);        //设置蜂鸣器输出
  pinMode(2, INPUT_PULLUP);
  if (!radio.begin()) {
    Serial.println("NRF初始化失败");
    while (1) {
      digitalWrite(8, 1);
      delay(500);
      digitalWrite(8, 0);
      delay(500);
    }
  }
  if (!SD.begin()) {
    Serial.println("SD初始化失败");
    while (1) {
      digitalWrite(8, 1);
      delay(500);
      digitalWrite(8, 0);
      delay(500);
    }
  }
  radio.setPALevel(RF24_PA_MIN);  // 设置为最大发射功率
  Serial.println("准备...");
  float calibrationValue;

  calibrationValue = 30.61;  //校准值根据实际情况进行修改

#if defined(ESP8266) || defined(ESP32)
  //EEPROM.begin(512); // uncomment this if you use ESP8266 and want to fetch this value from eeprom
#endif
  //EEPROM.get(calVal_eepromAdress, calibrationValue); // uncomment this if you want to fetch this value from eeprom

  LoadCell.begin();
  //LoadCell.setReverseOutput();
  unsigned long stabilizingtime = 2000; // tare preciscion can be improved by adding a few seconds of stabilizing time
  boolean _tare = true; //set this to false if you don't want tare to be performed in the next step
  LoadCell.start(stabilizingtime, _tare);
  if (LoadCell.getTareTimeoutFlag()) {
    Serial.println("Timeout, check MCU>HX711 wiring and pin designations");
  }
  else {
    LoadCell.setCalFactor(calibrationValue); // set calibration factor (float)
    Serial.println("Startup is complete");
  }
  while (!LoadCell.update());
  Serial.print("Calibration value: ");
  Serial.println(LoadCell.getCalFactor());
  Serial.print("HX711 measured conversion time ms: ");
  Serial.println(LoadCell.getConversionTime());
  Serial.print("HX711 measured sampling rate HZ: ");
  Serial.println(LoadCell.getSPS());
  Serial.print("HX711 measured settlingtime ms: ");
  Serial.println(LoadCell.getSettlingTime());
  Serial.println("Note that the settling time may increase significantly if you use delay() in your sketch!");
  if (LoadCell.getSPS() < 7) {
    Serial.println("!!Sampling rate is lower than specification, check MCU>HX711 wiring and pin designations");
  }
  else if (LoadCell.getSPS() > 100) {
    Serial.println("!!Sampling rate is higher than specification, check MCU>HX711 wiring and pin designations");
  }
  file = SD.open("test.txt", FILE_WRITE);
  if (file) {
    file.println("            ");
    file.println("            ");
    file.println("以上数据作废 ");
    file.println("开始记录新数据:");
    file.close();
  }
}

void loop() {
  unsigned long timenow2 = millis();
  static boolean newDataReady = 0;
  const int serialPrintInterval = 500;  //increase value to slow down serial print activity
  // check for new data/start next conversion:
  if (LoadCell.update()) newDataReady = true;
  if (newDataReady) {
    i = LoadCell.getData();
  }
  if (digitalRead(2) == 1) {
    if (timenow2 - time2 >= timenow) {
      time2 = timenow2;
      time++;
    }
    file = SD.open("test.txt", FILE_WRITE);
    file.print(i / 1000 * 9.8);  //单位转换N
    file.print("   ");
    file.print(time);
    file.println("s");
    file.close();
    Serial.print(i);
    radio.openWritingPipe(address);
    radio.write(&i, sizeof(i));
    Serial.print("g");
    Serial.print(" ");
    Serial.print(i / 1000 * 9.8);
    Serial.print("N");
    radio.openWritingPipe(address2);
    radio.write(&time, sizeof(time));
    Serial.print(" ");
    Serial.print(time);
    Serial.println("s");
  } else {
    time = 0;
    LoadCell.tareNoDelay();
  }
  if (digitalRead(3) == 0) {
    LoadCell.tareNoDelay();
    digitalWrite(8, 1);
    delay(500);
    digitalWrite(8, 0);
    time = 0;
    file = SD.open("test.txt", FILE_WRITE);
    if (file) {
      file.println("            ");
      file.println("            ");
      file.println("以上数据作废 ");
      file.println("开始记录新数据:");
      file.close();
    }
  }
}

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