Diff: main.cpp

Revision:

3:8782b8b8658b

Parent:

2:329597081c06

Child:

4:673930f04866

--- a/main.cpp	Fri Apr 01 23:09:07 2016 +0000
+++ b/main.cpp	Sun Apr 10 15:29:57 2016 +0000
@@ -3,7 +3,6 @@
 EL15PJT
 Embedded System Project
 EL2645
-
 */
 
 #include "mbed.h"
@@ -13,10 +12,12 @@
 #define LOW 0
 #define HIGH 1
 
+
 DigitalOut rr_led (PTA1);
 DigitalOut a_led (PTC2);
 DigitalOut gg_led(PTB23);
 
+
 // Ranger object
 SRF02 srf02(I2C_SDA,I2C_SCL);
 
@@ -24,6 +25,7 @@
 N5110           lcd(PTE26,PTA0,PTC4,PTD0,PTD2,PTD1,PTC3);
 
 Ticker ticker;
+Ticker ticker_srf02;
 
 // K64F on-board LEDs
 DigitalOut r_led(LED_RED);
@@ -31,16 +33,17 @@
 DigitalOut b_led(LED_BLUE);
 
 // K64F on-board switches
-InterruptIn sw2(SW2);
-InterruptIn sw3(SW3);
+//InterruptIn sw1(SW2);
+InterruptIn sw2(SW3);
 
 volatile int g_timer_flag = 0;
+volatile int g_timer_flag_srf02 = 0;
+volatile int g_sw2_flag = 0;
+//volatile int g_sw1_flag = 0;
 
+int alert;
 int distance;
-int length;
-int alert;
-
-char buffer[14];  // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
+float bright = 1;
 
 // struct for state
 struct Alertlevel {
@@ -63,68 +66,37 @@
     {HIGH,HIGH,HIGH,LOW,LOW,LOW},// steady red
     {LOW,LOW,LOW,HIGH,HIGH,HIGH} // all flash
 };
-// timed interuprt
-void timer_isr();
-
-// set up board
-void init_K64F();
+void lcdoutput();
+void timer_isr(); // timed interuprt
+void timer_isr_srf02();
+void backlight();
+void init_K64F(); // set up board
+void sw2_isr();
+//void sw1_isr();
+void setalert();
+void setleds();
 
 int main()
 {
     lcd.init();
     init_K64F();
-    ticker.attach(&timer_isr,0.05);
-
+    ticker.attach(&timer_isr,0.35);
+    ticker_srf02.attach(&timer_isr_srf02,0.02);
+    // sw1.fall(&sw1_isr);
+    sw2.fall(&sw2_isr);
     while(1) {
-
-// read sensor distance in cm and print over serial port
-        int distance = srf02.getDistanceCm();
-        length = sprintf(buffer,"D = %i Cm",distance);
-        if (length <= 14)
-            lcd.printString(buffer,0,2);
-// need to refresh display after setting pixels
-        lcd.refresh();
-
-// short delay before next measurement
-        wait(0.25);
-
-//Range Alert selection use to adjust alert boundarys
-        if (distance >= 200 && distance < 250) {
-            alert = 1; //flash green
-        } else if (distance >= 150 && distance  < 200) {
-            alert = 2; //steady green
-        } else if (distance >= 100 && distance < 150) {
-            alert = 3; //flashing amber
-        } else if (distance >= 50 && distance < 100) {
-            alert = 4; //steady amber
-        } else if ( distance > 10 && distance < 50) {
-            alert = 5; //flashing red
-        } else if (distance > 1 && distance <= 10) {
-            alert = 6; //steady red
-        } else if (distance <=1) {
-            alert = 7; //all flashing
-        } else {
-            alert = 0; //no output
+        if (g_sw2_flag) {
+            g_sw2_flag = 0;  // if it has, clear the flag
+            backlight();
         }
-// Steady light outputs
-        rr_led = Alertlevel[alert].srr_led;
-        a_led = Alertlevel[alert].sa_led;
-        gg_led = Alertlevel[alert].sgg_led;
-
-//Flashing light outputs
-        if (g_timer_flag) {
-            g_timer_flag = 0;  // if it has, clear the flag
-
-            if ( Alertlevel[alert].frr_led == HIGH) {
-                rr_led = !rr_led;
-            } else if ( Alertlevel[alert].fa_led == HIGH) {
-                a_led = !a_led;
-            } else if ( Alertlevel[alert].fgg_led == HIGH) {
-                gg_led = !gg_led;
-            }
+        if (g_timer_flag_srf02) {
+            g_timer_flag_srf02 = 0;  // if it has, clear the flag
+            int distance = srf02.getDistanceCm();
         }
+        lcdoutput();
+        setalert();
+        setleds();
     }
-
 }
 
 //Set up board switches and LEDS
@@ -138,11 +110,112 @@
 // since the on-board switches have external pull-ups, we should disable the internal pull-down
 // resistors that are enabled by default using InterruptIn
     sw2.mode(PullNone);
-    sw3.mode(PullNone);
+    // sw1.mode(PullNone);
+}
+void lcdoutput()
+{
+    int length;
+    int length1;
+    char buffer[14];  // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
+    char buffer1[14];  // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
+
+
+    length = sprintf(buffer,"D = %i Cm",distance);
+    length1 = sprintf(buffer1,"Bright = %f Cm",bright);
+
+    if (length <= 14)
+        lcd.printString(buffer,0,0);
+    lcd.printString(buffer1,0,1);
+
+    // draw a line across the display at y = 40 pixels (origin top-left)
+    for (int i = 0; i < WIDTH; i++) {
+        lcd.setPixel(i,45);
+    }
+
+    lcd.refresh(); // need to refresh display after setting pixels
+}
+
+void setalert()
+{
+    if (distance >= 200 && distance < 250) {
+        alert = 1; //flash green
+    } else if (distance >= 150 && distance  < 200) {
+        alert = 2; //steady green
+    } else if (distance >= 100 && distance < 150) {
+        alert = 3; //flashing amber
+    } else if (distance >= 50 && distance < 100) {
+        alert = 4; //steady amber
+    } else if ( distance > 10 && distance < 50) {
+        alert = 5; //flashing red
+    } else if (distance > 1 && distance <= 10) {
+        alert = 6; //steady red
+    } else if (distance <=1) {
+        alert = 7; //all flashing
+    } else {
+        alert = 0; //no output
+    }
 }
 
+void setleds()
+{
+    // If statments to determin the output of each LED
+
+    if (Alertlevel[alert].frr_led == HIGH) {
+        if (g_timer_flag) {
+            g_timer_flag = 0;  // if it has, clear the flag
+            rr_led = !rr_led;
+        }
+    } else {
+        rr_led = Alertlevel[alert].srr_led;
+    }
+
+    if (Alertlevel[alert].fa_led == HIGH) {
+        if (g_timer_flag) {
+            g_timer_flag = 0;  // if it has, clear the flag
+            a_led = !a_led;
+        }
+    } else {
+        a_led = Alertlevel[alert].sa_led;
+    }
+
+    if (Alertlevel[alert].fgg_led == HIGH) {
+        if (g_timer_flag) {
+            g_timer_flag = 0;  // if it has, clear the flag
+            gg_led = !gg_led;
+        }
+    } else {
+        gg_led = Alertlevel[alert].sgg_led;
+    }
+}
+
+void backlight ()
+{
+
+    if (bright == 1.0) {
+        bright = 0;
+    } else {
+        bright += 0.2;
+    }
+    lcd.setBrightness(bright);
+}
+
+void sw2_isr()
+{
+    g_sw2_flag = 1;   // set flag in ISR
+}
+
+/*void sw1_isr()
+{
+    g_sw1_flag = 1;   // set flag in ISR
+}*/
+
 
 void timer_isr()
 {
     g_timer_flag = 1;   // set flag in ISR
+}
+
+void timer_isr_srf02()
+{
+    g_timer_flag_srf02 = 1;   // set flag in ISR
 }
\ No newline at end of file