4 #define READ_BUFFER_LENGTH 64
6 int hiddev_read(unsigned char *data, int bufsize, int fd);
7 int hiddev_write(const unsigned char data[64], int fd , int usage_code);
8 int hiddev_open(const char *device_path, int *usage_code);
9 int hiddev_open_by_id(int vendor_id, int product_id, int *usage_code);