xmodem.h

arm9的bootloader大家下载解压缩即可看到

/*
 * xmodem.h
 *
 */

/* returns the number of bytes transferred */
typedef unsigned int size_t;
typedef unsigned long __u32;
__u32 xmodem_receive(char *dest, size_t len);
 size_t download_file(char *buf, size_t size, int modem, char *name);