-extern int can_set_mask(int dual_mask,int count,uint8_t *mask,uint8_t *accept);
-
-extern int can_poll();
-extern int can_transmit_direct(uint8_t *data);
-//int can_transmit(char ext_header,char rtr,int mask_size,uint8_t *mask,int numbytes,uint8_t *data);
-extern int can_transmit(int ext_header,int rtr,uint8_t *mask,int numbytes,uint8_t *data);
-//int can_receive(uint8_t *data);
-extern int can_receive(uint8_t len,uint8_t *data);
-