lab1

lab1/main.c

@@ -173,9 +173,66 @@ int main3(void) {
 }
 
 // Your solution here
+void initRedLED(void) {
+    P1->SEL0 &= ~0x01;
+    P1->SEL1 &= ~0x01;   // 1) configure P1.0 as GPIO
+    P1->DIR  |=  0x01;   // 2) make P1.0 output
+}
+
+void initColorLED(void) {
+    P2->SEL0 &= ~0x07;
+    P2->SEL1 &= ~0x07;   // 1) configure P2.2-P2.0 as GPIO
+    P2->DIR  |=  0x07;   // 2) make P2.2-P2.0 out
+    P2->DS   |=  0x07;   // 3) activate increased drive strength
+    P2->OUT  &= ~0x07;   // 4) all LEDs off
+}
+
+void initInput(void) {
+    P1->SEL0 &= ~(SW1 | SW2);
+    P1->SEL1 &= ~(SW1 | SW2);  // 1) configure P1.4 P1.1 P1.0 as GPIO
+    P1->DIR  &= ~(SW1 | SW2);  // 2) SW1 and SW2 input
+    P1->REN  |=  (SW1 | SW2);  // 4) enable pull resistors on P1.4 and P1.1
+}
+
+// read P1.4, P1.1 inputs
+uint8_t inP1(void) {
+    return P1->IN & (SW1 | SW2);
+}
+
+// write one output bit to P1
+void outP1(uint8_t data) {  
+    P1->OUT = (P1->OUT & ~0x01) | data;
+}
+
+// write three outputs bits to P2
+void outP2(uint8_t data) {  
+    P2->OUT = (P2->OUT & ~0x07) | data;
+}
+
 int main(void) {
-    
+    initRedLED();
+    initColorLED();
+    initInput();
+
+    outP2(0);
     while (true) {
-        
+        uint8_t switches = inP1() ^ (SW1 | SW2);
+        switch (switches) {
+            case SW1:
+                outP1(RED);
+                outP2(BLUE);
+                break;
+            case SW2:
+                outP1(RED);
+                outP2(GREEN);
+                break;
+            case SW1 | SW2:
+                outP1(0);
+                outP2(RED);
+                break;
+            default:
+                outP1(0);
+                outP2(BLUE | GREEN);
+        }
     }
 }