FlProg

Код: Выделить всё

int sensorValue;
    int sensorMax = 0;
    uint32_t start_time = millis();
    while((millis()-start_time) < Interval)
    {
        sensorValue = analogRead( Input );
        if (sensorValue > sensorMax) 
        {
          sensorMax = sensorValue;
        }
    }
    return sensorMax;

Код: Выделить всё

if ( EN ) {
int sensor_max;
    sensor_max = getMaxValue();
    amplitude =(float)(sensor_max-512)/1024* value *1000000;
    effective = amplitude /1.414;

Код: Выделить всё

/****************************************************************************/
 // Function: Measure the amplitude current of the alternating current and
 // the effective current of the sinusoidal alternating current.
 // Hardware: Grove - Electricity Sensor
 // Date: Jan 19,2013
 // by www.seeedstudio.com
 #define ELECTRICITY_SENSOR A0 // Analog input pin that sensor is attached to
 float amplitude_current; //amplitude current
 float effective_value; //effective current
 void setup()
 {
 Serial.begin(9600);
 pins_init();
 }
 void loop()
 {
 int sensor_max;
 sensor_max = getMaxValue();
 Serial.print("sensor_max = ");
 Serial.println(sensor_max);
 //the VCC on the Grove interface of the sensor is 5v
 amplitude_current=(float)sensor_max/1024*5/800*2000000;
 effective_value=amplitude_current/1.414;//minimum_current=1/1024*5/800*2000000/1.414=8.6(mA)
 //Only for sinusoidal alternating current
 Serial.println("The amplitude of the current is(in mA)");
 Serial.println(amplitude_current,1);//Only one number after the decimal point
 Serial.println("The effective value of the current is(in mA)");
 Serial.println(effective_value,1);
 }
 void pins_init()
 {
 pinMode(ELECTRICITY_SENSOR, INPUT);
 }
 /*Function: Sample for 1000ms and get the maximum value from the SIG pin*/
 int getMaxValue()
 {
 int sensorValue; //value read from the sensor
 int sensorMax = 0;
 uint32_t start_time = millis();
 while((millis()-start_time) < 1000)//sample for 1000ms
 {
 sensorValue = analogRead(ELECTRICITY_SENSOR);
 if (sensorValue > sensorMax)
 {
 /*record the maximum sensor value*/
 sensorMax = sensorValue;
 }
 }
 return sensorMax;
 }