Diff: main.cpp

Revision:

1:8e7e9ef6b0bd

Parent:

0:d83ac315a24c

Child:

2:25f679fea061

--- a/main.cpp	Fri Feb 17 20:37:32 2017 +0000
+++ b/main.cpp	Tue Mar 07 18:43:43 2017 +0000
@@ -2,7 +2,12 @@
 #include "FastAnalogIn.h"
 
 
-FastAnalogIn ain(p20); //Analog Input to PDmux
+
+Serial pc(USBTX, USBRX); // tx, rx
+
+FastAnalogIn ain(p20); //Fast&Furious:Tokyo Drift Analog Input to PDmux
+//AnalogIn ain(p20); //Analog Input to PDmux
+
 DigitalOut LEDout(p8); //5V output to LED mux
 DigitalOut LEDmux0(p9); //s0
 DigitalOut LEDmux1(p10); //s1
@@ -13,26 +18,35 @@
 DigitalOut PDmux1(p15); //s1
 DigitalOut PDmux2(p16); //s2
 DigitalOut PDmux3(p17); //s3
+AnalogOut aout(p18);
 
 
+double voltageOut;
+double readIn[5];
+
 
 double alpha; //dummy variable for ADC
 
 
+
 int main()
 {
+    pc.baud(921600);
+    //pc.format();
+
 //   double ADCtime=.000000116; //1.6 us
     double time=.000029;  // ~15kHz
 //    double time=.0000029; //100 kHz
-//    double time=.003;
+//    double time=.0003;
+
 
     //counters for various while loops
-    int mPD=0;
-    int nPD=0;
-    int mLED=0;
-    int nLED=0;
-    int pd=0;
-    int i=0;
+//    int mPD=0;
+//    int nPD=0;
+//    int mLED=0;
+//    int nLED=0;
+    //int pd=0;
+    //int i=0;
 
     //boolean bits for multiplexing
     LEDmux0=0;
@@ -49,58 +63,82 @@
     while(1) {
 
 
-        //loop to mux through the 8 photodiodes
-        while(pd<8) {
+        //loop to mux through photodiodes
+
+        for(int pd=0; pd<6; pd++) {
             //loop will take 5 measurements for the selected LED/PD combo
-            while(i<5) {
+            for(int i=0; i<5; i++) {
                 LEDout = 1;
-                alpha=ain.read();
+                readIn[i]=ain.read();
                 wait(time);
 
-                LEDout = 0;
-                alpha=ain.read();
-                wait(time);
-                i++;
+                //LEDout = 0;
+                //alpha=ain.read();
+                //wait(time);
             }
-            i=0;
+
+            voltageOut=(readIn[2]+readIn[3]+readIn[4])/3;
+            aout=voltageOut;
 
-            PDmux0=!PDmux0; //flip LSB
-
-            //flips 2nd bit every other cycle
-            if (mPD==1) {
-                PDmux1=!PDmux1;
-                mPD=0;
+            //send the diode readings to Matlab
+            if(pd==0) {
+                pc.printf("1,%f \n", voltageOut);
+            } else if(pd==1) {
+                pc.printf("2,%f \n", voltageOut+10);
+            } else if(pd==2) {
+                pc.printf("3,%f \n", voltageOut+20);
+            } else if(pd==3) {
+                pc.printf("4,%f \n", voltageOut+30);
+            } else if(pd==4) {
+                pc.printf("5,%f \n", voltageOut+40);
             } else {
-                mPD++;
+                pc.printf("6,%f \n", voltageOut+50);
             }
 
-            //flips 3rd bit after every 4th cycle
-            if (nPD==3) {
-                PDmux2=!PDmux2;
-                nPD=0;
+
+
+            //PD multiplexing
+            if((PDmux0==0) && (PDmux1==0) && (PDmux2==0)) {
+                PDmux0=1;
+            } else if((PDmux0==1) && (PDmux1==0) && (PDmux2==0)) {
+                PDmux0=0;
+                PDmux1=1;
+            } else if((PDmux0==0) && (PDmux1==1) && (PDmux2==0)) {
+                PDmux0=1;
+            } else if((PDmux0==1) && (PDmux1==1) && (PDmux2==0)) {
+                PDmux0=0;
+                PDmux1=0;
+                PDmux2=1;
+            } else if((PDmux0==0) && (PDmux1==0) && (PDmux2==1)) {
+                PDmux0=1;
             } else {
-                nPD++;
+                PDmux0=0;
+                PDmux2=0;
             }
-            pd++;
-        }
-        pd=0;
-
-        //same multiplexing code above, but for LEDs
-        LEDmux0=!LEDmux0;
 
-        if (mLED==1) {
-            LEDmux1=!LEDmux1;
-            mLED=0;
-        } else {
-            mLED++;
         }
+                if((LEDmux0==0) && (LEDmux1==0) && (LEDmux2==0)) {
+                    LEDmux0=1;
+                } else if((LEDmux0==1) && (LEDmux1==0) && (LEDmux2==0)) {
+                    LEDmux0=0;
+                    LEDmux1=1;
+                } else if((LEDmux0==0) && (LEDmux1==1) && (LEDmux2==0)) {
+                    LEDmux0=1;
+                } else if((LEDmux0==1) && (LEDmux1==1) && (LEDmux2==0)) {
+                    LEDmux0=0;
+                    LEDmux1=0;
+                    LEDmux2=1;
+                } else if((LEDmux0==0) && (LEDmux1==0) && (LEDmux2==1)) {
+                    LEDmux0=1;
+                } else {
+                    LEDmux0=0;
+                    LEDmux2=0;
+                }
+        
 
-        if (nLED==3) {
-            LEDmux2=!LEDmux2;
-            nLED=0;
-        } else {
-            nLED++;
-        }
+
 
     }
 }
+
+