一、I2c-tool编译
发现网上很多文章的编译都是这么说的：
1、下载i2c-tool工具
2、解压，修改 Makefile 的编译器并在下面添加一句
CC = arm-fsl-linux-gnueabi-gcc
LDFLAGS += -static
3、make && make install prefix=./install
然后将i2c编译生成的工具放到开发板上去，即可运行。
结果发现，运行的结果如下：
line 1: syntax error: unexpected word (expecting ")")
很明显，根本没有被交叉编译到，于是顺藤摸瓜，找到Module.mk，将$(CC)全部改为如下：arm-linux-gnueabihf-gcc
# I2C tools for Linux
#
# Copyright (C) 2007 Jean Delvare <[email protected]>
#
# 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.
TOOLS_DIR := tools
TOOLS_CFLAGS := -Wstrict-prototypes -Wshadow -Wpointer-arith -Wcast-qual \
-Wcast-align -Wwrite-strings -Wnested-externs -Winline \
-W -Wundef -Wmissing-prototypes -Iinclude
TOOLS_TARGETS := i2cdetect i2cdump i2cset i2cget
#
# Programs
#
$(TOOLS_DIR)/i2cdetect: $(TOOLS_DIR)/i2cdetect.o $(TOOLS_DIR)/i2cbusses.o
arm-linux-gnueabihf-gcc $(LDFLAGS) -o $@ $^
$(TOOLS_DIR)/i2cdump: $(TOOLS_DIR)/i2cdump.o $(TOOLS_DIR)/i2cbusses.o $(TOOLS_DIR)/util.o
arm-linux-gnueabihf-gcc $(LDFLAGS) -o $@ $^
$(TOOLS_DIR)/i2cset: $(TOOLS_DIR)/i2cset.o $(TOOLS_DIR)/i2cbusses.o $(TOOLS_DIR)/util.o
arm-linux-gnueabihf-gcc $(LDFLAGS) -o $@ $^
$(TOOLS_DIR)/i2cget: $(TOOLS_DIR)/i2cget.o $(TOOLS_DIR)/i2cbusses.o $(TOOLS_DIR)/util.o
arm-linux-gnueabihf-gcc $(LDFLAGS) -o $@ $^
#
# Objects
#
$(TOOLS_DIR)/i2cdetect.o: $(TOOLS_DIR)/i2cdetect.c $(TOOLS_DIR)/i2cbusses.h $(INCLUDE_DIR)/linux/i2c-dev.h
arm-linux-gnueabihf-gcc $(CFLAGS) $(TOOLS_CFLAGS) -c $< -o $@
$(TOOLS_DIR)/i2cdump.o: $(TOOLS_DIR)/i2cdump.c $(TOOLS_DIR)/i2cbusses.h $(TOOLS_DIR)/util.h $(INCLUDE_DIR)/linux/i2c-dev.h
arm-linux-gnueabihf-gcc $(CFLAGS) $(TOOLS_CFLAGS) -c $< -o $@
$(TOOLS_DIR)/i2cset.o: $(TOOLS_DIR)/i2cset.c $(TOOLS_DIR)/i2cbusses.h $(TOOLS_DIR)/util.h $(INCLUDE_DIR)/linux/i2c-dev.h
arm-linux-gnueabihf-gcc $(CFLAGS) $(TOOLS_CFLAGS) -c $< -o $@
$(TOOLS_DIR)/i2cget.o: $(TOOLS_DIR)/i2cget.c $(TOOLS_DIR)/i2cbusses.h $(TOOLS_DIR)/util.h $(INCLUDE_DIR)/linux/i2c-dev.h
arm-linux-gnueabihf-gcc $(CFLAGS) $(TOOLS_CFLAGS) -c $< -o $@
$(TOOLS_DIR)/i2cbusses.o: $(TOOLS_DIR)/i2cbusses.c $(TOOLS_DIR)/i2cbusses.h $(INCLUDE_DIR)/linux/i2c-dev.h
arm-linux-gnueabihf-gcc $(CFLAGS) $(TOOLS_CFLAGS) -c $< -o $@
$(TOOLS_DIR)/util.o: $(TOOLS_DIR)/util.c $(TOOLS_DIR)/util.h
arm-linux-gnueabihf-gcc $(CFLAGS) $(TOOLS_CFLAGS) -c $< -o $@
#
# Commands
#
all-tools: $(addprefix $(TOOLS_DIR)/,$(TOOLS_TARGETS))
strip-tools: $(addprefix $(TOOLS_DIR)/,$(TOOLS_TARGETS))
strip $(addprefix $(TOOLS_DIR)/,$(TOOLS_TARGETS))
clean-tools:
$(RM) $(addprefix $(TOOLS_DIR)/,*.o $(TOOLS_TARGETS))
install-tools: $(addprefix $(TOOLS_DIR)/,$(TOOLS_TARGETS))
$(INSTALL_DIR) $(DESTDIR)$(sbindir) $(DESTDIR)$(man8dir)
for program in $(TOOLS_TARGETS) ; do \
$(INSTALL_PROGRAM) $(TOOLS_DIR)/$$program $(DESTDIR)$(sbindir) ; \
$(INSTALL_DATA) $(TOOLS_DIR)/$$program.8 $(DESTDIR)$(man8dir) ; done
uninstall-tools:
for program in $(TOOLS_TARGETS) ; do \
$(RM) $(DESTDIR)$(sbindir)/$$program ; \
$(RM) $(DESTDIR)$(man8dir)/$$program.8 ; done
all: all-tools
strip: strip-tools
clean: clean-tools
install: install-tools
uninstall: uninstall-tools即发现运作正常了。
二、使用