cc2531: USB changes:

- usb cdc-acm:
  * implement get line coding
  * use printf only when debugging
  * Add events

- usb-core: do not force debugging

See Pull Request #18

cpu/cc253x/usb/common/cdc-acm/cdc-acm.h

@@ -1,7 +1,29 @@
 #ifndef __CDC_ACM_H__UFV6K50827__
 #define __CDC_ACM_H__UFV6K50827__
 
+#include "cdc.h"
+#include "contiki.h"
+
 void
 usb_cdc_acm_setup();
 
+
+#define USB_CDC_ACM_LINE_CODING 0x1
+#define USB_CDC_ACM_LINE_STATE  0x2
+uint8_t
+usb_cdc_acm_get_events(void);
+
+
+#define USB_CDC_ACM_DTE 0x1
+#define USB_CDC_ACM_RTS 0x2
+uint8_t
+usb_cdc_acm_get_line_state(void);
+
+
+const struct usb_cdc_line_coding *
+usb_cdc_acm_get_line_coding(void);
+
+void
+usb_cdc_acm_set_event_process(struct process *p);
+
 #endif /* __CDC_ACM_H__UFV6K50827__ */