lab2

common/bump.c

@@ -2,11 +2,18 @@
 
 #include "inc/msp432p401r.h"
 
+#define BUMP_PINS 0b11101101
+
 void BumpInit(void) {
-    // write this as part of Lab 2
+    // Port 4 pins 0, 2, 3, 5, 6, 7
+    // and enables internal resistors
+    P4->SEL0 &= ~BUMP_PINS;
+    P4->SEL1 &= ~BUMP_PINS; // 1) configure P4.0 P4.2 P4.3 P4.5 P4.6 P4.7 as gpio
+    P4->DIR  &= ~BUMP_PINS; // 2) configure as input
+    P4->REN  |=  BUMP_PINS; // 3) enable pull resisors
 }
 
 uint8_t BumpRead(void) {
     // write this as part of Lab 2
-    return 0;  // replace this line
+    return P4->IN & BUMP_PINS;
 }

lab2/main.c

@@ -5,17 +5,26 @@
 #include "../common/delay.h"
 #include "../common/clock.h"
 
+#define DUMP_SIZE 256
+
+uint8_t bump_status;
+uint8_t bump_dump[DUMP_SIZE];
+
 void DebugDump(uint8_t bump) {
-    // write this as part of Lab 2
+    static idx = 0;
+    idx = (idx + 1) % DUMP_SIZE;
+    bump_dump[idx] = bump;
 }
 
 int main(void) {
-    // write this as part of Lab 2
     ClockInit48MHz();
+    BumpInit();
 
     while (true) {
-        // write this as part of Lab 2
         // 10ms delay
+        Delay1ms(10);
+        bump_status = BumpRead();
         // debug dump
+        DebugDump(bump_status);
     }
 }