initial commit

main.c

@@ -0,0 +1,80 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <wiringPi.h>
+
+void get_one(int *a, int p) {
+	a[p] = digitalRead(p);
+	return;
+}
+
+void get_all(int *a) {
+	for (int i = 1; i < 32; i++) {
+		a[i] = digitalRead(i);
+	}
+        return;
+}
+
+void print_all_quiet(int *a) {
+	for (int i = 1; i <= 31; i++) {
+		if (i % 10) {
+			printf("%d ", a[i]);
+		} else if (i == 30) {
+			printf("%d ", a[i]);
+                } else {
+                  putchar('\n');
+                }
+        }
+}
+
+void print_all_oneline(int *a) {
+	for (int i = 1; i <= 31; i++)
+		printf("%d ", a[i]);
+
+	putchar('\n');
+}
+
+int main(int argc, char *argv[]) {
+	/*
+	 * pins[] array: GPIO pins only, input only; using WiringPi num scheme
+	 * 0: placeholder
+	 * 1-31: WiringPi 1-31
+	*/
+	int pins[31];
+	int pin;
+
+	wiringPiSetupPinType(WPI_PIN_WPI);
+	//printf("%i\n", argc);
+
+        switch (argc) {
+        case 1: // print everything
+		get_all(pins);
+		printf("Pins 1-10:\n\t");
+                for (int i = 1; i <= 10; i++) {
+			printf("%d ", pins[i]);
+                }
+		printf("\nPins 11-20:\n\t");
+                for (int i = 11; i <= 20; i++) {
+			printf("%d ", pins[i]);
+                }
+		printf("\nPins 21-30:\n\t");
+                for (int i = 21; i <= 30; i++) {
+			printf("%d ", pins[i]);
+                }
+                putchar('\n');
+                break;
+	case 2: // print 1 pin
+		pin = atoi(argv[1]);
+                if ((pin >= 1) && (pin <= 31)) {
+			get_one(pins, pin);
+			printf("%d\n", pins[pin]);
+                }
+                break;
+	default: // no
+		fprintf(stderr, "err: too many args (%d)\n", argc-1);
+		return EXIT_FAILURE;
+		break;
+        }
+
+	return EXIT_SUCCESS;
+}