Diff: main.cpp

Revision:

0:9b4382147415

diff -r 000000000000 -r 9b4382147415 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Dec 15 16:09:59 2020 +0000
@@ -0,0 +1,85 @@
+#include "ADXL345.h"
+#include "mbed.h"
+ADXL345 accelerometer(p5, p6, p7, p8);  //ADXL 345 Pins  SDA, SDO,SCL,CS
+Serial pc(USBTX, USBRX); // ENABLING SERIAL COMMUNCIATION WITH PC
+AnalogIn LM35(p15); // LM35 PIN
+DigitalOut trigger(p9); // TRIG PIN OF ULTRASONIC SENSOR
+DigitalOut aled(p11); //Accelerometer change indication led /Buzzer
+DigitalOut tled(p12); //Temperature reading change indication led /Buzzer
+DigitalOut oled(p13); //Obstacle detection indication led /Buzzer
+DigitalIn  echo(p10);  //ECHO PIN OF ULTRASONIC SENSOR
+DigitalIn safe(p14);  //Safety switch if the user, fallsdown the aled will turn on ,if the user is safe,he can press the safety switch so that aled will turn off
+float dis = 0;  //VARAIBLE TO CALCULATE DISTANCE
+int cf = 0;   // CORRECTION FACTOR FOR UNIT CONVERSION
+Timer sonar;  // TIMER INITIALIZATION
+int pxcut=100; //Mention your cut off Value in forward 
+int nxcut=-100; //Mention your cut off Value in backward
+int pycut=100; //Mention your cut off Value in left
+int nycut=-100; //Mention your cut off Value in right
+int main() {
+    //---------Temperature sensor varaibles-------------//
+    float tvalue;  //TEMPERATURE SENSOR VALUE READING
+    //------------------Accelerometer sensor VARIABLES-----------//
+    int readings[3] = {0, 0, 0};  //ACCELEROMETER 3-AXIS DATA
+    accelerometer.setPowerControl(0x00); //ENABLLING THE STAND BY MODE
+    accelerometer.setDataFormatControl(0x0B); //FULL RESOULTION, +/-16g, 4mg/LSB.
+    accelerometer.setDataRate(ADXL345_3200HZ); //SETTING DATA TRANSFER RATE OF ADXL345 TO 3.2kHz
+    accelerometer.setPowerControl(0x08); //Measurement mode.
+    //---------------------Ultrasonics Sensor VARIABLES----------------------//
+    sonar.reset(); //TIMER RESET
+    sonar.start(); // TIMER START
+    while (echo==2) {};
+    sonar.stop();  //TIMER STOP
+    cf = sonar.read_us(); // MICRO SECONDS CALCULATION
+    
+ 
+    while (1) {
+    
+        wait(0.1);
+        
+        accelerometer.getOutput(readings);
+        
+        //13-bit, sign extended values.
+        pc.printf("%i, %i, %i\n", (int16_t)readings[0], (int16_t)readings[1], (int16_t)readings[2]);
+        
+        if ((int16_t)readings[0] > pxcut || (int16_t)readings[0] < nxcut ||(int16_t)readings[1] > pycut || (int16_t)readings[1] < nycut)
+        {
+            aled=1;
+            wait(1);
+            }
+        tvalue = ((LM35.read()*3276)/10);
+        if(tvalue >35)
+        {
+            tled=1;
+            wait(1);
+            }         
+        pc.printf("Temp: %2.2f degree C\r\n", tvalue);
+        wait(1);
+        trigger = 1; // trigger sonar to send a ping
+        sonar.reset();
+        wait_us(10.0);
+        trigger = 0;
+        while (echo==0) {}; //wait for echo high
+        sonar.start(); //echo high, so start timer
+        while (echo==1) {}; //wait for echo low
+        sonar.stop(); //stop timer and read value
+        dis = (sonar.read_us()-cf)/58.0; //subtract software overhead timer delay and scale to cm
+        pc.printf(" %d cm \n\r",dis);
+        if(dis < 20 )
+        {
+            oled=1;
+            wait(1);
+            }
+        wait(0.2);//wait so that any echo(s) return before sending another ping
+        if (safe==1)
+        {
+            aled=0;
+            wait(1);
+            
+            }
+            aled=0;
+            tled=0;
+            oled=0;
+    }
+ 
+}
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