Diff: main.cpp

Revision:

0:4fbaafa6574c

Child:

1:26267401354a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Nov 12 18:56:57 2014 +0000
@@ -0,0 +1,125 @@
+#include "mbed.h"
+#include "uLCD_4DGL.h"
+#include "rtos.h"
+#include "stdio.h"
+#include "max31855.h"
+
+uLCD_4DGL uLCD(p9,p10,p11); // serial tx, serial rx, reset pin;
+SPI thermoSPI(p5,p6,p7); // setup SPI interface
+max31855 max1(thermoSPI, p20); //setup max31855 interface
+Mutex lcd_mutex; // mutex to make the lcd lib thread safe
+Semaphore four_slots(1); //Activate semaphore
+DigitalOut toggle(p30);
+DigitalIn up(p19);
+DigitalIn down(p18);
+
+int settemp = 75;
+
+float ftemperature = 0; // float variable for temperature
+float ctemperature = 0; // float variable for temperature
+
+// Thread t1
+//  print the elapsed time on line 1 of the uLCD (i.e., HH:MM:SS)
+void elapsedtime(void const *args) { //line 2
+    int s = 00;
+    int m = 00;
+    int h = 00;
+    
+    while(true){
+        s++;
+        if(s>59){
+           s=00;
+          m++;
+         }
+         if(m>59){
+           m=00;
+           h++;
+         }
+       four_slots.wait();
+       //lcd_mutex.lock();
+        uLCD.color(0xFFFF00);
+        uLCD.locate(0,0); //col,row
+        wait(0.1);
+        uLCD.printf("ET: %2d:%2d:%2d", h,m,s);
+        //lcd_mutex.unlock();
+        four_slots.release();
+        Thread::wait(1000); // update once per secon
+    }
+}
+
+
+// Thread t2
+//  print the temperature from the thermocouple - MAX31855 device
+void thermoread(void const *args) { //line 2
+    
+
+    while(true){
+        if (max1.ready()==1){
+            ctemperature = max1.read_temp(); //Get the reading
+            ftemperature = (ctemperature)*(9.0/5.0)+32.0;
+            four_slots.wait();    
+            uLCD.color(0xFFFF00);
+            uLCD.locate(0,2); //col,row
+            wait(0.1);
+            uLCD.printf("Current Temp. F");
+            uLCD.locate(0,3); //col,row
+            uLCD.printf("%4.2f", ftemperature);
+            
+            //uLCD.locate(0,5); //col,row
+           // uLCD.printf("Set Temp. F");
+           // uLCD.locate(0,6); //col,row
+          //  uLCD.printf("%d",settemp);
+           
+            four_slots.release(); 
+        }
+    }
+}
+
+
+void thermoset (void const *args) { //line 2
+    while(true){
+        if (up==1){
+            settemp += 1;
+            four_slots.wait();    
+            uLCD.color(0xFFFF00);        
+            uLCD.locate(0,5); //col,row
+            uLCD.printf("Set Temp. F");
+            uLCD.locate(0,6); //col,row
+            uLCD.printf("%d",settemp);
+            four_slots.release(); 
+            wait(.5);
+        }
+        if (down==1){
+            settemp -= 1;
+            four_slots.wait();    
+            uLCD.color(0xFFFF00);        
+            uLCD.locate(0,5); //col,row
+            uLCD.printf("Set Temp. F");
+            uLCD.locate(0,6); //col,row
+            uLCD.printf("%d",settemp);
+            four_slots.release();
+            wait(.5); 
+        }
+    }
+}
+
+
+
+int main() {
+    max1.initialise(); //initialize thermocouple IC    
+    uLCD.baudrate(3000000); //set LCD baudrate
+    Thread t1(elapsedtime); //run elapsed time counter
+    Thread t2(thermoread); //read and display temperature from thermocouple
+    Thread t3(thermoset);
+    
+    
+    while(1){ //While so program doesn't end
+            if(ftemperature < settemp-1){
+                toggle=1; //turn on ssr
+            }
+            if(ftemperature > settemp+1){
+                toggle=0;
+            }
+            wait(1);
+        }
+}
\ No newline at end of file