Diff: main.cpp

Revision:

5:97429a69bdcd

Parent:

3:3d51f8870e91

Child:

6:b5f2a1f5b91a

--- a/main.cpp	Fri Jul 26 09:31:58 2019 +0000
+++ b/main.cpp	Fri May 01 14:32:54 2020 +0000
@@ -1,222 +1,36 @@
 #include "mbed.h"
-#include "flow.h"
+#include "eco2.h"
+//I2C bus for both ZMOD and temperature sensor
+ 
+Serial pc(PC_12, PD_2); 
+I2C i2c(PB_9, PB_8);
+DigitalOut wake(PB_2);
 
-/////////////////////////
-// In this version of the program developed for the Breath project, flow and CO2, as well as 8 channel sensors,
-// are measured in a separate .h file called: "flow.h" which is included in the
-// main code. So 10 sets of data is streamed using a serial connection (TTL cable or Bluetooth)
-// without any intruption. 
-// This version is especially suitable to be used for KST.
-// Also, a solenoid would be turned on and off based on calculating the standard deviation in CO2 profile.
-//
-// START POINT: calculates SD for 9 samples of CO2, if it's grater than 0.02 it enables the solenoid.
-// END POINT: calculates SD for 9 samples of CO2, if it's grater thatn 0.05 it disables the solenoid.
-//
-// You can easily change the threshold of Standard deviation to detect plateau
-//
-// Generated by: Mehrnaz Javadipour
-////////////////////////// 
+uint16_t eco2, tvoc;
 
-Serial ttl(PC_12,PD_2);  //TTL cable TX,RX
-DigitalOut sol(PC_5);   //Solenoid: Digital Output
-PwmOut led(PB_6);
-
-
-
+ 
 int main()
 {
-    ttl.baud(9600); //baudrate for the serial connection
-    flow();         //calling flow from flow.h
-    carbon();       //calling CO2 from flow.h
-    s1();           //calling 8 channels from flow.h
-    s2();
-    s3();
-    s4();
-    s5();
-    s6();
-    s7();
-    s8();
-    getTemp();      //calling Temperature from flow.h
+    int addr=0x80; //si7050 8bit address
     
-    //////////////////////////////
-    // I defined a flag for each section of specific functions, so by enabling the
-    // flag the section starts and by disabling the flag it finishes the section.
-    // at the end of the program, I reset the flags so it would be ready for the next loop.   
-    /////////////////////////////
-    
-    int bf=0;         //FLAG for detecting base flow
-    int i=0;
-    float bfArray[4]; //sampling flow for finding the average base flow          
-    float sf=0;       //sum of flow samples for calculating base flow
-    float fv=0;       //final value of base flow
-    
-    int measurement_started=0; //FLAG for starting calculations after detecting breath
-    
-    int solstart=0;         //FLAG for starting calculations for detecting plateau
-    int m=0;
-    int myArray[9];         //sampling 9 values of CO2
-    unsigned int sum=0;     //sum of 9 samples of CO2
-    int avg=0;              //average of 9 samples of CO2
-    int difSum=0;           //used for the Standard deviation algorithm
-    long double var=0.0;    //used for the Standard deviation algorithm
-    float sigma=0.0;        //final value for standar deviation
-    int flags=0;            //FLAG for keep taking samples from CO2 profile when it's too early to detect plateau
+    char wTemp[1];
+    wTemp[0]=0xE3; //Hold master mode
+    char rTemp[2]; //Temperature returns MSB and LSB
+                    //assume MBS in rTemp[0] and LSB in rTemp[1]
     
-    int solend=0;           //FLAG for ending calculations for detecting plateau
-    unsigned int sum2=0;    //same as before; used for finding standard deviation
-    long double var2=0.0;
-    float sigma2=0.0;
-    int difSum2=0;
-    int avg2=0;
-    int flage=0;            //FLAG for keep taking samples from CO2 profile when it's too early to finish plateau
+    char wInit[2];
+    wInit[0]=0xE6; //User register 1
+    wInit[1]=0x00; //Set 14 bit resolution, other read-ony registers shouldn't be affected
     
-    int fin=0;
-    
-
+    i2c.write(addr,wInit,2);
     
-    while(1)
-    {
-        led=1.00f;      //an LED is fully turned on at the beginning, the brightness will be reduced when the plateau is detected.
-        ttl.printf("%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f\n",getTemp(),flow(), carbon(),s1(),s2(),s3(),s4(),s5(),s6(),s7(),s8());
-
-        if (bf==0)      //finding base flow before breath
-            {
-              for(i=0; i<4; i++) 
-                  {
-                    bfArray[i]=flow();  
-                    sf+=bfArray[i];                  
-                  }   
-               fv=sf/4;
-               fv=fv+0.2; 
-               //ttl.printf("set\n");
-               bf=1;
-             }
-        
-        //Starts calculations when it detects breathing into the device:
-        
-        if ((flow()>fv) and (measurement_started ==0)) 
-            {        
-                measurement_started = 1;
-            }
-        
-        //Starts detecting plateau:
+    while(1){
+        i2c.write(addr,wTemp,1);
+        i2c.read(addr,rTemp,2); //Returns 2 bytes
+        float temp_code=(rTemp[0]<<8)+rTemp[1];
+        float temp=((175.72*temp_code)/65536)-46.85;
+        pc.printf("Temp: %f\n",temp);
         
-        if ((measurement_started == 1) and (solstart==0)) 
-            {
-                //Takes 9 samples of CO2:
-                //I have also included printing the values inside the loops so we don't loose any data during calculatins.
-                for(m=0;m<9;m++)
-                    {
-                        ttl.printf("%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f\n",getTemp(),flow(), carbon(),s1(),s2(),s3(),s4(),s5(),s6(),s7(),s8());
-                        myArray[m]=carbon();
-                    }
-                while(flags==0)
-                    {
-                        //While "flags" is enabled, keeps calculating the standard deviation.
-                        for(int m=0;m<9;m++)
-                            { 
-                            ttl.printf("%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f\n",getTemp(),flow(), carbon(),s1(),s2(),s3(),s4(),s5(),s6(),s7(),s8());
-                            sum+=myArray[m]; 
-                            }
-                        avg=sum/9;
-                        for(int m=0;m<9;m++)
-                            {
-                            ttl.printf("%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f\n",getTemp(),flow(), carbon(),s1(),s2(),s3(),s4(),s5(),s6(),s7(),s8());
-                            difSum+=(myArray[m]-avg)*(myArray[m]-avg); //Find sum of difference between value X and mean
-                            }
-                            var=difSum/9;
-                            sigma=sqrt(var);
-                        if (sigma<0.02)
-                            {
-                            
-                            //if SD is less than 0.02 it means that it is too early to start the plateau
-                            //So we shift all but the first sample and define the new set of arrays:
-                            
-                            for(int m=0;m<8;m++)
-                             {
-                              ttl.printf("%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f\n",getTemp(),flow(), carbon(),s1(),s2(),s3(),s4(),s5(),s6(),s7(),s8());
-                              myArray[m]=myArray[m+1];  //Shift all CO2 values to the left by 1 value
-                             }
-                             myArray[8]=carbon();  //assign a new value for the 9th sample
-                            }
-                             //The new set of arrays are now generated and is sent back to be used for preveious SD calculations.
-                             //If sigma for the new set is still small, a newer set will be generated and replaced
-                             //Otherwise, it's accepted and will turn on the solenoid:
-                            else
-                            {
-                            ttl.printf("%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f\n",getTemp(),flow(), carbon(),s1(),s2(),s3(),s4(),s5(),s6(),s7(),s8());
-                            sol=1;      //Solenoid is ON
-                            led=0.50f;  //The brightness is reduced to half during the plateau
-                            flags=1;    //breakes the while loop
-                            }
-                     }
-                solend=1;   //prepares the next section for finishing the plateau
-                solstart =1;
-            }
-        if ((measurement_started == 1) and (solend==1)) 
-        {
-          // same process happens for finishing the plateau:
-        
-                for(m=0;m<9;m++)
-                    {
-                        ttl.printf("%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f\n",getTemp(),flow(), carbon(),s1(),s2(),s3(),s4(),s5(),s6(),s7(),s8());
-                        myArray[m]=carbon();
-                    }
-                while(flage==0)
-                    {
-                        for(int m=0;m<9;m++)
-                            { 
-                            ttl.printf("%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f\n",getTemp(),flow(), carbon(),s1(),s2(),s3(),s4(),s5(),s6(),s7(),s8());
-                            sum2+=myArray[m]; 
-                            }
-                        avg2=sum2/9;
-                        for(int m=0;m<9;m++)
-                            {
-                            ttl.printf("%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f\n",getTemp(),flow(), carbon(),s1(),s2(),s3(),s4(),s5(),s6(),s7(),s8());
-                            difSum2+=(myArray[m]-avg2)*(myArray[m]-avg2); 
-                            }
-                            var2=difSum2/9;
-                            sigma2=sqrt(var2);
-                        if (sigma2<0.05)
-                            {
-                            // here we defined the end threshold to be 0.05, it can be changed later based on experiment results
-                            for(int m=0;m<8;m++)
-                             {
-                              ttl.printf("%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f\n",getTemp(),flow(), carbon(),s1(),s2(),s3(),s4(),s5(),s6(),s7(),s8());
-                              myArray[m]=myArray[m+1];  
-                             }
-                             myArray[8]=carbon();   
-                            }else
-                            {
-                            ttl.printf("%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f\n",getTemp(),flow(), carbon(),s1(),s2(),s3(),s4(),s5(),s6(),s7(),s8());
-                            sol=0;  //Solenoid is OFF
-                            flage=1;    //breakes the loop
-                            }
-                     }
-        solend =0;  //end of this section
-        led=1.00f;  //LED is back to full brightness
-        bf=0;       //reset the detecting base flow flag
-        fin=1;      //enables the next section flag
-        }
-     if((carbon()<10000) and (fin ==1)) 
-            {
-                //User has to wait for the CO2 level to drop less than 1% before testing again.
-                //Once it is less than 1%, all the flags and parameters used in calculations are reset
-                measurement_started =0;
-                solstart=0;
-                sum=0;
-                var=0.0;
-                sigma=0.0;
-                difSum=0;
-                 sum2=0;
-                var2=0.0;
-                sigma2=0.0;
-                difSum2=0;
-                avg2=0;
-                avg=0;
-                flags=0;
-                flage=0;
-                fin=0;
-            }
     }
+    
 }
\ No newline at end of file