Diff: main.cpp

Revision:

0:1f8e362f558b

Child:

1:04f483a4edc0

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Oct 21 14:15:32 2014 +0000
@@ -0,0 +1,74 @@
+#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
+
+
+// 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(0,1); //col,row
+        wait(0.1);
+        uLCD.printf("ET: %2d:%2d:%2d", h,m,s);
+        //lcd_mutex.unlock();
+        four_slots.release();
+        Thread::wait(250); // update once per secon
+    }
+}
+
+
+// Thread t2
+//  print the temperature from the thermocouple - MAX31855 device
+void thermoread(void const *args) { //line 2
+    
+    float ftemperature = 0; // float variable for temperature
+    while(true){
+        if (max1.ready()==1){
+            ftemperature = max1.read_temp(); //Get the reading
+        
+            four_slots.wait();    
+            uLCD.color(0xFFFF00);
+            uLCD.locate(0,3); //col,row
+            wait(0.1);
+            uLCD.printf("Temp. is: %f", ftemperature);
+            four_slots.release();
+        
+        }
+    }
+}
+ 
+
+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
+    
+    while(1){ //While so program doesn't end
+
+        }
+}