Reimplement the initial wait

main.c

@@ -19,8 +19,8 @@
 #define DELAY 4000000		// This is bad -- it's a value that was found to be OK
 #define STM32F1 1			// Needed for libopencm3
 
-enum {FORWARD, BACKWARD} direction;
-bool running = false;
+volatile enum {FORWARD, BACKWARD} direction;
+volatile bool running = false;
 
 void setup (void) {			// All the blackbox code
 
@@ -79,6 +79,9 @@ int main (void) {
 	char state = 0;
 	int i;
 
+	// Initial wait
+	while (!running) ;
+
 	while (true) {
 		for (i=0 ; i<DELAY ; i++) {
 			__asm ("nop");