Revision 1:abca5455262a, committed 2015-10-01

Comitter:

DCamuti

Date:

Thu Oct 01 03:40:31 2015 +0000

Parent:

0:108062801773

Commit message:

Coupled Tank System

Changed in this revision

--- a/main.cpp	Thu Sep 24 00:29:53 2015 +0000
+++ b/main.cpp	Thu Oct 01 03:40:31 2015 +0000
@@ -1,3 +1,6 @@
+//Daniel Camuti and Hannah Hjelmstrom
+//ES301 - Coupled Tank System Part 2
+
 #include "mbed.h"
 // APIs
 Serial pc(USBTX, USBRX); // tx, rx for serial USB interface to pc
@@ -10,57 +13,57 @@
 
 LocalFileSystem local("local"); // Create the local filesystem under the name "local"
 
-int read_max1270(int chan, int range, int bipol){
+int read_max1270(int chan, int range, int bipol)
+{
     int cword=0x80;     //set the start bit
-    
+
     spi_max1270.frequency(10000000);
     spi_max1270.format(8, 0);   // 8 data bits, CPOL0, and CPHA0 (datasheet Digital Interface)
-        
+
     cword |= (chan << 4);   //shift channel
     cword |= (range << 3);
     cword |= (bipol << 2);
-            
+
     max1270_cs = 0;
-           
+
     spi_max1270.write(cword);
     wait_us(15);    //15us
     spi_max1270.format(12, 3);
-    
+
     int result = spi_max1270.write(0);
-    
+
     max1270_cs = 1;
     spi_max1270.format(8, 0);
     return result;
 }
 
-float read_max1270_volts(int chan, int range, int bipol){
+float read_max1270_volts(int chan, int range, int bipol)
+{
     float rangevolts=0.0;
     float volts=0.0;
     int adc_res;
 
     //read the ADC converter
     adc_res = read_max1270(chan, range, bipol) & 0xFFF;
-        
-   //Determine the voltage range
-   if(range)  //RNG bit 
-     rangevolts=10.0;
-   else
-     rangevolts=5.0;
-             
-   //bi-polar input range
-   if(bipol){ //BIP is set, input is +/-
-     if(adc_res < 0x800){ //if result was positive
-      volts = ((float)adc_res/0x7FF) * rangevolts;      
-     }       
-     else{  //result was negative
-      volts = -(-((float)adc_res/0x7FF) * rangevolts) - (rangevolts * 2.0); 
-     }
-   }
-   else{  //input is positive polarity only
-      volts = ((float)adc_res/0xFFF) * rangevolts;   
-   }
-   
-   return volts;     
+
+    //Determine the voltage range
+    if(range)  //RNG bit
+        rangevolts=10.0;
+    else
+        rangevolts=5.0;
+
+    //bi-polar input range
+    if(bipol) { //BIP is set, input is +/-
+        if(adc_res < 0x800) { //if result was positive
+            volts = ((float)adc_res/0x7FF) * rangevolts;
+        } else { //result was negative
+            volts = -(-((float)adc_res/0x7FF) * rangevolts) - (rangevolts * 2.0);
+        }
+    } else { //input is positive polarity only
+        volts = ((float)adc_res/0xFFF) * rangevolts;
+    }
+
+    return volts;
 }
 
 float Tank1,Tank2,dt;
@@ -80,69 +83,69 @@
 
 int main ()
 {
-    pc.baud(921600); // Establish baud rate 
-    mot_en1.period_us(50); // Set PWM length to 50 us   
+    pc.baud(921600); // Establish baud rate
+    mot_en1.period_us(50); // Set PWM length to 50 us
     max1270_cs = 1; // Activate A/D
     cntr = 0.0; // cntr used to keep track of sample period and elpased time
-    
+
     // initialize data vectors
-    for(k=0;k<100;k++)
-  { etime[k] = 0.0;
-    t1v[k] = 0.0;
-    t2v[k] = 0.0;
-    dcp[k] = 0.0;    
-  }
-  k = 0; // Reset index counter
-    pc.printf("Time Tank1 Tank2 DC \n\r");        
-    while(cntr*Ts <= 60) {
+    for(k=0; k<100; k++) {
+        etime[k] = 0.0;
+        t1v[k] = 0.0;
+        t2v[k] = 0.0;
+        dcp[k] = 0.0;
+    }
+    k = 0; // Reset index counter
+    pc.printf("Time Tank1 Tank2 DC \n\r");
+    while(cntr*Ts <= 200) {
         t.start(); // start measuring comp time
-        
-        // Read pressure sensors        
+
+        // Read pressure sensors
         Tank1 = read_max1270_volts(1, 1, 1); // in volt
         Tank2 = read_max1270_volts(0, 1, 1);
-                
-        // Select pump duty cycle, start time, and end time  
-         if (cntr*Ts <= 10) { //start time
+
+        // Select pump duty cycle, start time, and end time
+        if (cntr*Ts <= 20) { //start time
             dc = 0.0;
-        } else if (cntr*Ts <= 20) { //end time
-         //
-        //dc = -0.80; // duty cycle (must be negative)
-        //dc=-0.60;
-        //dc=-0.65;
-        //dc=-0.70;
-        //dc=-0.75;
-        dc = -0.0;
+        } else if (cntr*Ts <= 200) { //end time
+            //
+            //dc = -0.80; // duty cycle (must be negative)
+            //dc=-0.60;
+            //dc=-0.65;
+            dc=-0.70;
+            //dc=-0.75;
+            //dc = -0.0;
         } else {
             dc = 0.0;
         }
-        
-        if(dc > 0.0){
+
+        if(dc > 0.0) {
             //mot1_ph2 = 0;
             mot1_ph1 = 1;
             mot_en1 = dc;
-        }
-        else if(dc <=0.0){
+        } else if(dc <=0.0) {
             mot1_ph1 = 0;
             //mot1_ph2 = 1;
-            mot_en1 = abs(dc);}
-        
+            mot_en1 = abs(dc);
+        }
+
         // Log data
         etime[k] = cntr*Ts;
         t1v[k] = Tank1;
         t2v[k] = Tank2;
         dcp[k] = -dc;
         k++;
-              
+
         t.stop(); // end measuring comp time
         dt = Ts-t.read();
         //pc.printf("%5.2f %5.2f %5.2f %5.2f \n\r",cntr*Ts,Tank1,Tank2,dc);
-        pc.printf("%5.2f %5.2f %5.2f %5.2f \n\r",cntr*Ts,Tank1,Tank2,dc);        
+        pc.printf("%5.2f %5.2f %5.2f %5.2f \n\r",cntr*Ts,Tank1,Tank2,dc);
         t.reset();
         cntr=cntr+1;
-        wait(dt); // wait to ensure sampling period set by Ts    
+        wait(dt); // wait to ensure sampling period set by Ts
     }//while
     //mot1_ph2 = 0;
     mot_en1 = 0.0;
-    
+
 
 }//main