/*

【Arduino】108种传感器模块系列实验(资料+代码+图形+仿真)

实验一百一十九：HB100微波雷达感应模块 10.525GHz多普勒探测器探头传感器

项目：测试HB100模块,输入改为模拟口A0,三组数据输出

*/

#define RADAR A0 // RADAR inut is attached to A0

#define MICRODELAY 100 // 100microseconds ~10000hz

#define MAXINDEX 1024 // 10 bits

#define TOPINDEX 1023 // 10 bits

byte collect[MAXINDEX];

int mean;

int minimum;

int maximum;

int hysteresis; // 1/16 of max-min

bool currentphase; // are value above mean + hysteresis;

int lastnull; // index for last null passing value

int prevnull; // index for previous null passing value

int deltaindex;

int deltadeltaindex;

int index;

bool phasechange = false;

void setup() {

// put your setup code here, to run once:

Serial.begin(115200);

while (!Serial) {}

index = 0;

mean = 0;

maximum = 255;

minimum = 0;

hysteresis = 0;

currentphase = false;

lastnull = 0;

prevnull = 0;

Serial.print("deltadeltaindex");

Serial.print("\t");

Serial.print("deltaindex");

Serial.print("\t");

Serial.println("delta");

}

void loop() {

int newVal = analogRead(RADAR); // Raw reading from amplified radar

mean -= (collect[index] >> 2);

mean += (newVal >> 2);

collect[index]= newVal;

minimum = newVal < minimum ? newVal : minimum + 1;

maximum = newVal > maximum ? newVal : maximum - 1;

hysteresis = abs(maximum - minimum) >> 5;

if(newVal > (mean + hysteresis))

{

if(false == currentphase)

{

currentphase = true;

phasechange = true;

}

}

else if(newVal < (mean - hysteresis))

{

if(currentphase)

{

currentphase = false;

phasechange = true;

}

}

if(phasechange)

{

prevnull = lastnull;

lastnull = index;

int delta = (prevnull > lastnull) ?

(lastnull - prevnull + MAXINDEX) :

(lastnull - prevnull);

deltadeltaindex = abs(deltaindex - delta);

deltaindex = delta;

Serial.print(deltadeltaindex);

Serial.print("\t");

Serial.print(deltaindex);

Serial.print("\t");

Serial.println(delta);

}

index = index == TOPINDEX ? 0 : index + 1;

phasechange = false;

//delayMicroseconds(10);

}