potentieller Lösungsweg, kann ihn nicht ausprobieren

task1/Src/task1.c

@@ -39,6 +39,10 @@
 /* ------------------------------------ DEFINES --------------------------------------- */
 #define LOOPS_PER_MS    1244             // NOP-loops for delay()
 #define WAITTIME        500
+#define FIRST_LED 0
+#define LAST_LED 3
+#define UP 1
+#define DOWN -1
 
 
 /* ------------------------------------ TYPE DEFINITIONS ------------------------------ */
@@ -50,6 +54,7 @@ int state = 0;
 /* ------------------------------------ PROTOTYPES ------------------------------------ */
 static void GPIO_init(void);
 static void delay(const uint16_t ms);
+static void blink(const unint numLED);
 
 
 /* ------------------------------------ M A I N --------------------------------------- */
@@ -67,9 +72,31 @@ int main(void)
 
 
     /* --- infinite processing loop --- */
+
     while (1)
     {
         /* ... add your code to implement the lab assignment ... */
+        int direction;
+
+        while(1){
+            if(i == FIRST_LED){
+                direction = UP;
+            }
+            else if(i == LAST_LED){
+                direction = DOWN;
+            }
+
+            blink(i); //One full LED blink cylce
+
+            if(direction == UP){
+                i++;
+            }
+            else if(direction == DOWN){
+                i--;
+            }
+        }
+
+
 
         switch (state) {
             case 0:
@@ -119,7 +146,7 @@ static void GPIO_init(void)
 {
     /* enable port clocks */
     RCC->AHB2ENR |= RCC_AHB2ENR_GPIOAEN;    // LEDs: A
-
+    int i = FIRST_LED;
 
     /* --- LEDs --- */
     GPIOA->ODR |= MASK_LED_ALL;
@@ -154,5 +181,25 @@ static void delay(const uint16_t ms)
     }
 }
 
+static void blink(const uint numLED)
+{
+    switch (state) {
+                case 0:
+                    GPIOA->ODR &= ~(1 << numLED); // LEDX on
+                    state++;
+                    break;
+                case 1:
+                    delay(WAITTIME);            // wait
+                    state++;
+                    break;
+                case 2:
+                    GPIOA->ODR |= (1 << numLED);     // LEDX off
+                    delay(WAITTIME);            // wait
+                    state = default;
+                    break;
+                default:
+                    break;
+}
+
 
 /* ************************************ E O F ***************************************** */