在u-boot下添加自定義命令

原創

2020-02-22 20:53

第一步：在/uboot/common/目錄下添加命令實現文件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中添加命令編譯

#
# (C) Copyright 2004-2006
# Wolfgang Denk, DENX Software Engineering, [email protected].
#
# 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.mk

LIB	= $(obj)libcommon.a

AOBJS	=

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.o



SRCS	:= $(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 target
include $(SRCTREE)/rules.mk

sinclude $(obj).depend

#########################################################################