-extern command_ret_t do_help(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_echo(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_sleep(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_env_print(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_env_default(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_env_set(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_env_save(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_loadf(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_loadcpm3(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_loadihex(cmd_tbl_t *, int, int, char * const []);
-#if defined(CONFIG_CMD_LOADB)
-extern command_ret_t do_load_serial_bin(cmd_tbl_t *, int, int, char * const []);
-#endif
-extern command_ret_t do_go(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_restart(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_console(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_dump_mem(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_mem_mm_avr(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_mem_nm_avr(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_eep_cp(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_busreq_pulse(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_date(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_gpio(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_sd(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_fat_stat(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_fat_ls(cmd_tbl_t *, int, int, char * const []);
-//extern command_ret_t do_fat_read(cmd_tbl_t *, int, int, char * const []);
-//extern command_ret_t do_fat_write(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_fat_rw(cmd_tbl_t *, int, int, char * const []);