Revision 6:8510744cd8b8, committed 2016-02-26

Comitter:

co838_tsc23

Date:

Fri Feb 26 21:11:02 2016 +0000

Parent:

5:34755d01f74a

Commit message:

Assessment 3

Changed in this revision

diff -r 34755d01f74a -r 8510744cd8b8 assessment2.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/assessment2.cpp	Fri Feb 26 21:11:02 2016 +0000
@@ -0,0 +1,106 @@
+
+
+#include "mbed.h"                       // stock MBED API
+#include "C12832.h"                     // for the LCD 
+#include "LM75B.h"                      // for the temperature sensor
+
+// various globals 
+
+
+Serial host (USBTX, USBRX);             // to-host UART via OpenSDAv2 
+
+C12832 shld_lcd (D11, D13, D12, D7, D10);   // LCD on the shield (128x32)
+
+LM75B lm_temp (D14, D15);               // temperature sensor 
+
+
+InterruptIn sw2_int (PTC6);             // interrupts for the two on-board switches 
+InterruptIn sw3_int (PTA4);
+
+static volatile int sw2_trig;           // switches triggered?
+static volatile int sw3_trig;
+
+
+//various interrupt handlers
+
+void sw2_interrupt (void)       // trig 2 interrupt handler
+{
+    sw2_trig = 1;
+}
+
+
+void sw3_interrupt (void)     //trig 3 interrupt handler 
+{
+    sw3_trig = 1;
+}
+
+/*
+ *The main method displays the temperature in F and C, the different temperature metrics can be accessed by using the two
+ triggers on the device SW2 and SW3. 
+ */
+int main (void)
+{
+    
+    host.baud (38400);
+    
+    // Initialsising variable for the triggers   
+    sw2_trig = 0;
+    sw3_trig = 0;
+    
+    // Initialising a variable for the different modes (F or C)
+    int mode = 0;
+
+    sw2_int.mode (PullUp);
+    sw2_int.fall (&sw2_interrupt);
+    
+    sw3_int.mode (PullUp);
+    sw3_int.fall (&sw3_interrupt);
+    
+    shld_lcd.cls ();
+    shld_lcd.locate (1, 1);
+    
+    //Prints this to the lcd
+    shld_lcd.printf ("The current temperature is:");
+   
+    
+ 
+    // this loop will run forever
+    for (;;) {
+        wait (0.7);                            // approx 50 cycles/sec
+        
+         // every 32 cycles, or thereabouts (will be truncated) 
+        float t = lm_temp.read ();
+         
+        //switch the temp to C
+        if (sw2_trig) {
+            mode = 0;
+            sw2_trig = 0;   
+            }
+            
+        //switch the temp to F   
+        if (sw3_trig) {
+            mode = 1;
+            sw3_trig = 0; 
+            }
+                        
+        // display the temp to the serial HOST and LCD if the temp is in C    
+        if(mode == 0){
+            
+            host.printf ("Temperature: %.2f celsuis \r\n", t);
+            shld_lcd.locate (1, 10);
+            shld_lcd.printf ("%.2f C", t);
+        
+        }
+        // display the temp to the serial HOST and LCD if the temp is in F  
+        else if (mode == 1){
+            
+            float tf = (t * 9.0/5.0  + 32);
+            host.printf ("Temperature: %.2f fehrenheit \r\n", tf);
+            shld_lcd.locate (1, 10);
+            shld_lcd.printf ("%.2f F", tf);
+        
+            
+        }    
+            
+    }
+}

diff -r 34755d01f74a -r 8510744cd8b8 dtest2.cpp
--- a/dtest2.cpp	Wed Jan 27 01:44:35 2016 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,167 +0,0 @@
-/*
- *  dtest2.cpp -- driving test for CO657 (interacting with the shield)
- *  Copyright (C) 2015 Fred Barnes, University of Kent  <frmb@kent.ac.uk>
- *  GPL >= 2.0
- */
-
-#include "mbed.h"                       /* stock MBED API */
-#include "C12832.h"                     /* for the LCD */
-#include "LM75B.h"                      /* for the temperature sensor */
-
-/* assorted globals */
-
-DigitalOut r_led (LED1);                /* connections for RGB LED */
-DigitalOut g_led (LED2);
-DigitalOut b_led (LED3);
-
-DigitalOut xr_led (PTA2);
-DigitalOut xg_led (PTC4);
-DigitalOut xb_led (PTA0);
-
-Serial host (USBTX, USBRX);             /* to-host UART via OpenSDAv2 */
-
-InterruptIn sw2_int (PTC6);             /* interrupts for the two on-board switches */
-InterruptIn sw3_int (PTA4);
-
-Ticker rgb_tick;                        /* timer for driving the LED */
-
-C12832 shld_lcd (D11, D13, D12, D7, D10);   /* LCD on the shield (128x32) */
-
-LM75B lm_temp (D14, D15);               /* temperature sensor */
-
-static volatile uint16_t counters[3];   /* red, green, blue */
-static volatile uint8_t bright[3];
-
-static volatile int sw2_trig;           /* switches triggered? */
-static volatile int sw3_trig;
-
-
-/*
- *  turns offset [0-311] into brightness level [0-255-255-0].
- */
-uint8_t brilvl (int offset)
-{
-    while (offset > 311) {
-        offset -= 312;
-    }
-    if (offset < 52) {
-        return (uint8_t)(offset * 5);
-    } else if (offset < 156) {
-        return 255;
-    } else if (offset < 208) {
-        return (uint8_t)((207 - offset) * 5);
-    }
-    return 0;
-}
-
-
-/*
- *  resets the various counters to their initial state
- */
-void reset_counters (void)
-{
-    for (int i=0; i<3; i++) {
-        counters[i] = 0;
-        bright[i] = brilvl (i * 104);
-    }
-}
-
-
-/*
- *  interrupt handlers
- */
-void rgb_tick_interrupt (void)
-{
-    for (int i=0; i<3; i++) {
-        counters[i] += (uint16_t)bright[i];
-    }
-    
-    r_led = ((counters[0] >> 8) & 1) ^ 1;
-    g_led = ((counters[1] >> 8) & 1) ^ 1;
-    b_led = ((counters[2] >> 8) & 1) ^ 1;
-    
-    xr_led = ((counters[0] >> 8) & 1);
-    xg_led = ((counters[1] >> 8) & 1);
-    xb_led = ((counters[2] >> 8) & 1);
-    
-    for (int i=0; i<3; i++) {
-        counters[i] &= 0xff;
-    }
-}
-
-
-void sw2_interrupt (void)
-{
-    sw2_trig = 1;
-}
-
-
-void sw3_interrupt (void)
-{
-    sw3_trig = 1;
-}
-
-
-
-
-/*
- *  start here
- */
-int main (void)
-{
-    int ctr;
-    
-    host.baud (38400);
-    host.printf ("Hello, FRDM-K64F driving-test world!\r\n");
-    
-    sw2_trig = 0;
-    sw3_trig = 0;
-    
-    reset_counters ();
-    
-    shld_lcd.cls ();
-    shld_lcd.locate (1, 1);
-    shld_lcd.printf ("Hello, CO657!");
-    
-    rgb_tick.attach (&rgb_tick_interrupt, 0.001);
-    ctr = 0;
-    
-    xr_led = 0;
-    
-    sw2_int.mode (PullUp);
-    sw2_int.fall (&sw2_interrupt);
-    
-    sw3_int.mode (PullUp);
-    sw3_int.fall (&sw3_interrupt);
-    
-    /* and then forever.. */
-    for (;;) {
-        wait (0.02);                            /* approx 50 cycles/sec */
-        
-        if ((ctr & 0x1f) == 0) {
-            /* every 32 cycles, or thereabouts (will be truncated) */
-            float t = lm_temp.read ();
-            
-            shld_lcd.locate (1, 10);
-            shld_lcd.printf ("Temp: %.2f", t);
-        }
-        
-        if (sw2_trig) {
-            ctr += 104;
-            sw2_trig = 0;
-        }
-        if (sw3_trig) {
-            ctr += 208;
-            sw3_trig = 0;
-        }
-        
-        ctr++;
-        if (ctr > 311) {
-            ctr -= 312;
-        }
-        for (int i=0; i<3; i++) {
-            bright[i] = brilvl (ctr + (i * 104));
-        }
-    }
-}
-