#ifndef _COINMECH_H_
#define _COINMECH_H_
+#include "vend.h"
+
+extern volatile u16 coin_value;
+extern volatile bool have_change;
+
void coin_eat();
+void coin_cost(u16 cost); /* specify the cost of an item. */
+void coinmech_init();
#endif /* _COINMECH_H_ */