feat: add prototypes+functions for moar LED blinks

yes. moar.
* also for now remove the built-in delay() function callsas it's doing
  pretty much nothing and use system() to call OS sleep command (works
  on GNU/Linux)

leds.cpp

@@ -23,10 +23,14 @@ void LEDS_Init(void) {
 
   /* Configure pins as output*/
   pinMode(LED_GREEN, OUTPUT);
+  pinMode(LED_BLUE, OUTPUT);
+  pinMode(LED_RED, OUTPUT);
 
 
   /* Turn off the LEDs; they are turned off by HIGH value. */
   pinWrite(LED_GREEN, HIGH);
+  pinWrite(LED_BLUE, HIGH);
+  pinWrite(LED_RED, HIGH);
 
 }
 
@@ -37,6 +41,18 @@ void LEDS_GreenOn(void) {
 
 }
 
+void LEDS_BlueOn(void) {
+
+  pinWrite(LED_BLUE, LOW);
+
+}
+
+void LEDS_RedOn(void) {
+
+  pinWrite(LED_RED, LOW);
+
+}
+
 
 /* Turn off green LED (RGB LED on FRDM-KL25Z board) */
 void LEDS_GreenOff(void) {
@@ -45,4 +61,14 @@ void LEDS_GreenOff(void) {
 
 }
 
-// TODO: add more functions...
+void LEDS_BlueOff(void) {
+
+  pinWrite(LED_BLUE, HIGH);
+
+}
+
+void LEDS_RedOff(void) {
+
+  pinWrite(LED_RED, HIGH);
+
+}

leds.h

@@ -18,11 +18,17 @@ void LEDS_Init(void);
 
 /* Turn on green LED (RGB LED on FRDM-KL25Z board) */
 void LEDS_GreenOn(void);
+
+void LEDS_BlueOn(void);
+
+void LEDS_RedOn(void);
+
 /* Turn off green LED (RGB LED on FRDM-KL25Z board) */
 void LEDS_GreenOff(void);
 
-// TODO: add Red and Blue LED functions
+void LEDS_BlueOff(void);
 
+void LEDS_RedOff(void);
 
 #endif /* SOURCES_DRV_LEDS_H_ */
 

main.cpp

@@ -11,9 +11,13 @@ int main()
     // blikani LED
     while(1) {
       LEDS_GreenOn();
-      delay();
+      system("sleep 1");
+      LEDS_BlueOn();
+      system("sleep 1");
       LEDS_GreenOff();
-      delay();
+      system("sleep 1");
+      LEDS_BlueOff();
+      system("sleep 1");
     }
     return 0;
 }