在u-boot下添加自定义命令

第一步：在/uboot/common/目录下添加命令实现文件cmd_hello.c

#include <common.h>#include <watchdog.h>#include <command.h>#include <image.h>#include <malloc.h>#include <zlib.h>#include <bzlib.h>#include <environment.h>#include <asm/byteorder.h>int do_hello(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]){int i;printf("\nhello everyone!\n");for(i=0;i<argc;i++){printf("argv[%d]:%s\n",i,argv[i]);} return 0;}U_BOOT_CMD(hello, 1, 1,do_hello,"hello - this is a short message\n","[arg] - this is a long message"" - this is a long message II\n");

第二步：在/uboot/Makefile中添加命令编译

## (C) Copyright 2004-2006# Wolfgang Denk, DENX Software Engineering, [e-mail].## 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 $(TOPDIR)/config.mkLIB= $(obj)libcommon.aAOBJS=COBJS= main.o ACEX1K.o altera.o bedbug.o circbuf.o \  cmd_ace.o cmd_autoscript.o \  cmd_bdinfo.o cmd_bedbug.o cmd_bmp.o cmd_boot.o cmd_bootm.o \  cmd_cache.o cmd_console.o \  cmd_date.o cmd_dcr.o cmd_diag.o cmd_display.o cmd_doc.o cmd_dtt.o \  cmd_eeprom.o cmd_elf.o cmd_ext2.o \  cmd_fat.o cmd_fdc.o cmd_fdos.o cmd_flash.o cmd_fpga.o \  cmd_i2c.o cmd_ide.o cmd_immap.o cmd_itest.o cmd_jffs2.o \  cmd_load.o cmd_log.o \  cmd_mem.o cmd_mii.o cmd_misc.o cmd_mmc.o \  cmd_nand.o cmd_net.o cmd_nvedit.o \  cmd_pci.o cmd_pcmcia.o cmd_portio.o \  cmd_reginfo.o cmd_reiser.o cmd_scsi.o cmd_spi.o cmd_universe.o \  cmd_usb.o cmd_vfd.o \  command.o console.o cyclon2.o devices.o dlmalloc.o docecc.o \  environment.o env_common.o \  env_nand.o env_dataflash.o env_flash.o env_eeprom.o \  env_nvram.o env_nowhere.o env_movi.o env_onenand.o \  exports.o \  flash.o fpga.o ft_build.o \  hush.o kgdb.o lcd.o lists.o lynxkdi.o \  memsize.o miiphybb.o miiphyutil.o \  s_record.o serial.o soft_i2c.o soft_spi.o spartan2.o spartan3.o \  usb.o usb_kbd.o usb_storage.o \  virtex2.o xilinx.o crc16.o xyzModem.o cmd_mac.o cmd_onenand.o \  cmd_usbd.o cmd_movi.o cmd_hello.oSRCS:= $(AOBJS:.o=.S) $(COBJS:.o=.c)OBJS:= $(addprefix $(obj),$(AOBJS) $(COBJS))CPPFLAGS += -I..all:$(LIB) $(AOBJS)$(LIB): $(obj).depend $(OBJS)$(AR) $(ARFLAGS) $@ $(OBJS)$(obj)environment.o: $(src)environment.c $(obj)../tools/envcrc$(CC) $(AFLAGS) -Wa,--no-warn \-DENV_CRC=$(shell $(obj)../tools/envcrc) \-c -o $@ $(src)environment.c$(obj)../tools/envcrc:$(MAKE) -C ../tools########################################################################## defines $(obj).depend targetinclude $(SRCTREE)/rules.mksinclude $(obj).depend#########################################################################