add: probe motor control PWM

Core/Inc/board_logic.h

@@ -12,6 +12,10 @@
 #define REL_MAIN_BIT      	(1u<<0)
 #define REL_AUX_BIT    		(1u<<1)
 
+#define MOTOR_MIN   		0
+#define MOTOR_MAX   		255
+
+
 void loop_iterate();
 void timer1_ovf_isr(void);