add toggle button for USB and improve BLE polling rate

usb_device.h

@@ -1,11 +1,20 @@
 #ifndef USB_DEVICE_H_
 #define USB_DEVICE_H_
 
+typedef enum {
+	DEVICE_INACTIVE=0,
+	DEVICE_START,
+	DEVICE_STOP,
+	DEVICE_ACTIVE
+} device_state_t;
+
 extern char cdc_buf[64];
 extern uint16_t cdc_len;
 extern size_t cdc_count;
+extern device_state_t device_state;
 
 void usb_device_init(void);
+bool forward_report(uint8_t instance, uint8_t const* report, uint16_t len);
 void cdc_print_hex(uint8_t const* msg, uint16_t msg_len);
 void cdc_print_str(char const* msg, uint16_t msg_len);
 void cdc_print_msg(char const* msg);