-int m437_init_obj_data(struct chip_t *chip, int objnr);
-void m437_write_register(unsigned char data, unsigned long address);
-unsigned m437_read_register(unsigned long address);
+int m437_init_obj_data(struct canchip_t *chip, int objnr);
+void m437_write_register(unsigned data, can_ioptr_t address);
+unsigned m437_read_register(can_ioptr_t address);