Diff: main.cpp

Revision:

0:5ee010a27b27

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Dec 05 16:40:22 2020 +0000
@@ -0,0 +1,80 @@
+#include "mbed.h"                                                               // mbed header
+#include "LM75B.h"                                                              // temp sensor header
+#include "C12832.h"                                                             // lcd screen header
+
+C12832 lcd(p5, p7, p6, p8, p11);                                                // define lcd
+LM75B sensor(p28,p27);                                                          // define tem sensor
+Serial pc(USBTX,USBRX);                                                         // define serial port
+LocalFileSystem local("local");                                                 // create local file system location
+
+int seconds = 60;                                                               // define timespan variable
+int i=0;                                                                        // define iteration variable
+float accum = 0.0;                                                              // define temporary accumulator float
+int timeDelay = 5;                                                              // define sample time range
+
+Thread thread1, thread2, thread3;
+
+void LM758_ok()
+{
+    while (1){
+        if (sensor.open()) {                                                        // test if temp sensor functioning (quickly eliminated if functional)
+            lcd.printf("Device detected!\n");
+            }   
+        else {                                                                    // if temp sensor not functioning throw an error
+            error("Device not detected!\n");
+        }
+        
+    ThisThread::sleep_for(2000);
+    
+    }
+}
+    
+void display_data() 
+{
+    while(1){
+        lcd.cls();                                                                  // clear lcd screen
+        lcd.locate(0,0);                                                            // create lcd home location
+        lcd.printf("Temp = %.3f\n\r", (float)sensor.temp());                             // print sensor reading to lcd
+        pc.printf("Temp = %.3f degrees C\n\r", (float)sensor.temp());                      // print sensor reading to pc
+
+        float value = (float)sensor.temp();                                                // store sensor reading as usable variable
+        accum = accum + value;                                                      // begin accumulating sum of values detected
+        i = i+1;
+        
+    ThisThread::sleep_for(5000);
+    
+    }
+}
+
+void log_data() 
+{
+    // This logging component still doesn't work, same as lab4
+    while(1){
+        if (i==(seconds/timeDelay)) {                                                           // define max number of iterations allowed
+            float avgTemp = accum/i;                                                            // create an average value for the sensor readings
+            pc.printf("Average Temp for last %d seconds = %.3f degrees C\n\r", seconds, avgTemp);        // print text of average temp reading to the pc
+
+            // attempt to record an average temperature over a defined period to local memory - in this case every minute.
+            lcd.printf("Data logging\n\r");
+            FILE *fp = fopen("/local/avgTemp.txt", "a");                             // direct to txt file in local memory
+            fprintf(fp,"%.5f\n", avgTemp);                                           // write average temp to local flash
+            fclose(fp);                                                             // close the file
+            ThisThread::sleep_for(6000);
+            //
+        }
+    
+    }
+}
+
+
+int main()                                                                      // start main program
+{
+
+    while (1) {                                                                 // constant loop
+        thread1.start(LM758_ok);
+        thread2.start(display_data);
+//        thread3.start(log_data);
+        
+//        wait(timeDelay);                                                        // wait for desired time between readings
+    }
+}