Diff: main.cpp

Revision:

3:fc189dd7ac64

Parent:

2:b49e5adf84df

Child:

4:8bb1d0776524

diff -r b49e5adf84df -r fc189dd7ac64 main.cpp
--- a/main.cpp	Mon Sep 14 14:14:04 2015 +0000
+++ b/main.cpp	Wed Aug 24 16:37:09 2016 +0000
@@ -3,60 +3,83 @@
 
 #define LEDON false
 #define LEDOFF true
-#define BUTDOWN false
-#define BUTUP true
 #define NUMBUTS 2
-#define LBUT PTC12
+#define LBUT PTC12  // port addresses for buttons
 #define RBUT PTC3
-#define BLINKTIME 0.3
-#define REDMESS "RED LED is ON\r\n" // adding  DR and line feed for terminal line advance
+#define BLINKTIME 0.3 // in seconds
+#define BUTTONTIME 0.2
 #define LCDCHARLEN 10
 #define NUMMESS 2
 #define LRED "RED"
 #define LGREEN "GREN"
 #define PRED "RED\r\n"
 #define PGREEN "GREEN\r\n"
-#define PROGNAME "blink_kl46z_buttton LCD v1\r\n"
+#define PROGNAME "blink_kl46z_buttton LCD v2\r\n"
 
 // slightly more interesting blinky 140814 sc
 SLCD slcd; //define LCD display
 
+// Timer to elliminate wait() function
+Timer LEDTimer; // for blinking LEDs
+Timer ButtonTimer; // for reading button states
 
-int ledState = LEDON;
-int buttonStates[NUMBUTS] = {BUTDOWN,BUTUP};
+bool ledState = LEDON;
+
 DigitalIn buttons[NUMBUTS] = {RBUT, LBUT};
 DigitalOut LEDs[NUMBUTS] = {LED_GREEN, LED_RED};
 Serial pc(USBTX, USBRX);// set up USB as communicationis to Host PC via USB connectons
 
+void allLEDsOff(){
+    int i;
+    for (i=0; i<NUMBUTS; i++){ 
+        LEDs[i] = LEDOFF;    
+    }
+}
+ 
 void LCDMess(char *lMess){
         slcd.Home();
         slcd.clear();
         slcd.printf(lMess);
 }
 
+void initialize_global_vars(){
+    pc.printf(PROGNAME);
+    // set up DAQ timers
+    ButtonTimer.start();
+    ButtonTimer.reset();
+    LEDTimer.start();
+    LEDTimer.reset();  
+    allLEDsOff();
+} 
 // --------------------------------
-int main() {
+ int main() {
     int i; 
     int currentLED = 0;
-    char rMess[NUMMESS][LCDCHARLEN]={LGREEN, LRED};
-    char pMess[NUMMESS][LCDCHARLEN]={PRED, PGREEN};
-    pc.printf(PROGNAME);
-    
+    char rMess[NUMMESS][LCDCHARLEN]={LGREEN, LRED}; // for LCD
+    char pMess[NUMMESS][LCDCHARLEN]={PRED, PGREEN}; // for pc serial port
+
+    initialize_global_vars(); //keep things organized
+    LEDs[currentLED] = LEDON;
     LCDMess(rMess[currentLED]);
     pc.printf(pMess[currentLED]);
+// End of setup
     while(true) {
-        for (i=0; i<NUMBUTS; i++){ // index will be 0 or 1
-            LEDs[i] = LEDOFF;      
-            // if(buttons[i] == BUTDOWN) {
-            if(!buttons[i]) {
-                 LCDMess(rMess[i]);
-                 pc.printf(pMess[i]); // this means that RED will be blinking
-                currentLED = i;
-            }
+        if (ButtonTimer > BUTTONTIME){
+            for (i=0; i<NUMBUTS; i++){ // index will be 0 or 1 
+                if(!buttons[i]) { 
+                    allLEDsOff();  
+                    LCDMess(rMess[i]);
+                    pc.printf(pMess[i]); 
+                    currentLED = i;
+                } // if ! buttons
+            }// for loop to look at buttons
+            ButtonTimer.reset();
         }
-                
-        ledState = !ledState; // Flip the general state
-        LEDs[currentLED] = ledState;
-        wait(BLINKTIME);
+        if(LEDTimer.read() > BLINKTIME){
+            LEDTimer.reset();               
+            ledState = !ledState; // Flip the general state
+            LEDs[currentLED] = ledState;
+        }
+    // Do other things here between times of reading and flashing
     }
 }
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