thanks to everyone first.
im able to write a new command for the u-boot and load it on to the board
and it works like a charm.
Im explaining the steps here so that it would be helpful in the future:
im using a MPC8313e RDB and u-boot-1.3.0.
1) First of all the commands are defined in files present in u-boot/common
folder and are the files that start with cmd_*.c
2) now to add a new command create a file in the same format
3) include the necessary header file (depends on what the command would
do)
4) "do_<command>" function. This is the function where you have to do what
your command intends to do.
5) U_BOOT_CMD( ) function will include your command to the list of
commands of u-boot
6) compile it and get the u-boot.bin file
7) load this on to the board.
8) TADAAAAA....ur function is up and running....
this is the content of firrst u-boot command i wrote:
cmd_dgprint.c
<code>
/*
* (C) Copyright 2005
* Wolfgang Denk, DENX Software Engineering, w...@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <command.h>
int do_dgprint(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
printf("Hi this is a test\n");
return 0;
}
U_BOOT_CMD(
dgprint, 1, 1, do_dgprint,
"dgprint takes no arguments",
"this is just to test a function"
);
</code>
hope this is useful to atleast one person
Regards,
Deepak Gopalakrishnan
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