IMX6Q上蓝牙设备测试

目前，蓝牙技术已经比较成熟，特别是基于手机和PC得蓝牙文件传输。
本文主要讲述基于嵌入式arm linux的蓝牙文件传输。
现行2.6.x的linux内核都已经集成了bluez蓝牙驱动，对于2.4版本内核的需要到bluez官方网站下载并安装bluez蓝牙驱动。
本为基于2.6版本的内核讲述。对于2.4下载bluez后安装即可。有了bluez蓝牙驱动还需要安装bluez-libs库和bluez-utils工具
蓝牙测试流程：利用手机连接蓝牙模块，然后进行文件传输。

1. 移植libs库和utils工具到arm开发板

---

bluez-utils:蓝牙配置工具，包括hciconfig，hcitool，rfcomm
openobex：蓝牙传输工具
下载bluez-utils:http://bluez.sf.net/download/bluez-utils-3.36.tar.gz
下载openobex：https://sourceforge.net/projects/openobex/files/openobex/1.5/openobex-1.5.0-Source.zip/download
bluez-utils依赖库：
expat-2.0.1:http://downloads.sourceforge.net/expat/expat-2.0.1.tar.gz
dbus-1.4.1:https://dbus.freedesktop.org/releases/dbus/dbus-1.4.1.tar.gz
zlib-1.2.5:http://download.chinaunix.net/down.php?id=35616&ResourceID=12241&site=1
glib-2.28.8:https://download.gimp.org/pub/glib/2.28/glib-2.28.6.tar.gz
bluez-libs-3.36:http://bluez.sf.net/download/bluez-libs-3.36.tar.gz
openobex-1.5依赖库：

2. 移植bluez-utils工具

---

##2.1、编译expat-2.0.1

#!/bin/sh
./configure --host=arm-linux-gnueabihf --prefix=$PWD/install
make && make install

##2.2、编译dbus-1.4.1

#!/bin/sh
./configure --host=arm-linux-gnueabihf CC=arm-linux-gnueabihf-gcc --prefix=$PWD/install \
CFLAGS=-I$PWD/../expat-2.0.1/install/include \
LDFLAGS=-L$PWD/../expat-2.0.1/install/lib \
--enable-abstract-sockets --with-x=no
make && make install
修改dbus中的pkgconfig文件dbus-1.pc，否则后面编译bluez-utils-3.36会报错
#vim install/lib/pkgconfig/dbus-1.pc
 16 Cflags: -I${includedir} -I${libdir}/dbus-1.0/include

##2.3、编译zlib-1.2.5

 #./configure --prefix=$PWD/install
 替换zlib中所有的编译工具链为arm-linux-gnueabihf-
 #vim Makefile
 19 CC=arm-linux-gnueabihf-gcc
 20
 21 CFLAGS= -D_LARGEFILE64_SOURCE=1
 22 #CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
 23 #CFLAGS=-g -DDEBUG
 24 #CFLAGS=-O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
 25 #           -Wstrict-prototypes -Wmissing-prototypes
 26
 27 SFLAGS= -fPIC -D_LARGEFILE64_SOURCE=1
 28 LDFLAGS= -L. libz.a
 29 TEST_LDFLAGS=-L. libz.a
 30 LDSHARED=arm-linux-gnueabihf-gcc -shared -Wl,-soname,libz.so.1,--version-script,zlib.map
 31 CPP=arm-linux-gnueabihf-gcc -E
 32
 33 STATICLIB=libz.a
 34 SHAREDLIB=libz.so
 35 SHAREDLIBV=libz.so.1.2.5
 36 SHAREDLIBM=libz.so.1
 37 LIBS=$(STATICLIB) $(SHAREDLIBV)
 38
 39 AR=arm-linux-gnueabihf-ar rc
 40 RANLIB=arm-linux-gnueabihf-ranlib
 41 LDCONFIG=arm-linux-gnueabihf-ldconfig
 42 LDSHAREDLIBC=-lc
 43 TAR=tar
 44 SHELL=/bin/sh
 45 EXE=
 #make && make install

##2.4、编译glib-2.28.8
vim compile.sh

#!/bin/sh
echo "glib_cv_stack_grows=no">config.cache
echo "glib_cv_uscore=no">>config.cache
echo "ac_cv_func_posix_getpwuid_r=yes">>config.cache
echo "ac_cv_func_posix_getgrgid_r=yes">>config.cache
echo "ac_cv_lib_rt_clock_gettime=no">>config.cache
echo "glib_cv_monotonic_clock=yes">>config.cache

export PKG_CONFIG_PATH=$PWD/../zlib-1.2.5/install/lib/pkgconfig
./configure --host=arm-linux-gnueabihf CC=arm-linux-gnueabihf-gcc --prefix=$PWD/install/ -cache-file=config.cache
make && make install
#./compile.sh

##2.5、编译bluez-libs-3.36

#./configure --host=arm-linux-gnueabihf --prefix=$PWD/install
#make && make install

##2.6、 编译bluez-utils-3.36

#vim compile.sh
export TOPDIR=$PWD/..
export PKG_CONFIG_PATH=$TOPDIR/glib-2.28.8/install/lib/pkgconfig:\
$TOPDIR/dbus-1.4.1/install/lib/pkgconfig:\
$TOPDIR/zlib-1.2.5/install/lib/pkgconfig:\
$TOPDIR/bluez-libs-3.36/install/lib/pkgconfig

./configure --host=arm-linux-gnueabihf --prefix=$PWD/install\
CFLAGS="`pkg-config --cflags bluez dbus-1 glib-2.0 zlib`" \
LDFLAGS="`pkg-config --libs bluez dbus-1 glib-2.0 zlib`"
#make &&make install
重新编译一次，因为生成的部分命令有默认路径问题
#vim compile.sh
export TOPDIR=$PWD/..
export PKG_CONFIG_PATH=$TOPDIR/glib-2.28.8/install/lib/pkgconfig:\
$TOPDIR/dbus-1.4.1/install/lib/pkgconfig:\
$TOPDIR/zlib-1.2.5/install/lib/pkgconfig:\
$TOPDIR/bluez-libs-3.36/install/lib/pkgconfig

./configure --host=arm-linux-gnueabihf \
CFLAGS="`pkg-config --cflags bluez dbus-1 glib-2.0 zlib`" \
LDFLAGS="`pkg-config --libs bluez dbus-1 glib-2.0 zlib`"
#make
然后将install/bin和install/sbin目录下的文件替换掉

3. 移植openobex-1.5工具

---

#vim compile.sh
#!/bin/sh
export TOPDIR=$PWD/../
export PKG_CONFIG_PATH=$TOPDIR/bluez-libs-3.36/install/lib/pkgconfig

./configure --host=arm-linux-gnueabihf --prefix=$PWD/install\
CFLAGS="`pkg-config --cflags bluez`" \
LDFLAGS="`pkg-config --libs bluez`"
#make && make install

4.连接蓝牙设备

先将上述编译生成的库文件及命令拷贝至板子上。
查看蓝牙设备
#hciconfig 

激活蓝牙设备
#hciconfig hci0 up
配置蓝牙设备
#vim /etc/bluetooth/rfcomm.conf

#
# HCI daemon configuration file.
#

# HCId options
options {
        # Automatically initialize new devices
        autoinit yes;#改成yes

        # Security Manager mode
        #   none - Security manager disabled
        #   auto - Use local PIN for incoming connections
        #   user - Always ask user for a PIN
        #
        security auto;

        # Pairing mode
        #   none  - Pairing disabled
        #   multi - Allow pairing with already paired devices
        #   once  - Pair once and deny successive attempts
        pairing multi;

        # Default PIN code for incoming connections
        passkey "BlueZ";

        pin_helper /usr/bin/bluepin
}

# Default settings for HCI devices
device {
        # Local device name
        #   %d - device id
        #   %h - host name
        name "BlueZ (%d)";

        # Local device class
        class 0x000100;

        # Default packet type
        #pkt_type DH1,DM1,HV1;

        # Inquiry and Page scan
        iscan enable; pscan enable;

        # Default link mode
        #   none   - no specific policy 
        #   accept - always accept incoming connections
        #   master - become master on incoming connections,
        #            deny role switch on outgoing connections
        lm accept;

        # Default link policy
        #   none    - no specific policy
        #   rswitch - allow role switch
        #   hold    - allow hold mode
        #   sniff   - allow sniff mode
        #   park    - allow park mode
        lp rswitch,hold,sniff,park;
}
root@myzr:~# cat /etc/bluetooth/rfcomm.conf 
#
# RFCOMM configuration file.
#

rfcomm0 {
#       # Automatically bind the device at startup
        bind no;
#
#       # Bluetooth address of the device
        device CC:08:8D:5B:26:94;#改成待连接设备MAC地址
#
#       # RFCOMM channel for the connection
        channel 1;#通道
#
#       # Description of the connection
        comment "Example Bluetooth device";
}

#vim /etc/bluetooth/hcid.conf
#
# HCI daemon configuration file.
#

# HCId options
options {
        # Automatically initialize new devices
        autoinit yes;

        # Security Manager mode
        #   none - Security manager disabled
        #   auto - Use local PIN for incoming connections
        #   user - Always ask user for a PIN
        #
        security auto;

        # Pairing mode
        #   none  - Pairing disabled
        #   multi - Allow pairing with already paired devices
        #   once  - Pair once and deny successive attempts
        pairing multi;

        # Default PIN code for incoming connections
        passkey "BlueZ";
	#pin_helper为线程名称，该线程调用/usr/bin/bluepin
	#/usr/bin/bluepin为shell脚本，内容下文提及
        pin_helper /usr/bin/bluepin
}

# Default settings for HCI devices
device {
        # Local device name
        #   %d - device id
        #   %h - host name
        name "BlueZ (%d)";

        # Local device class
        class 0x000100;

        # Default packet type
        #pkt_type DH1,DM1,HV1;

        # Inquiry and Page scan
        iscan enable; pscan enable;

        # Default link mode
        #   none   - no specific policy 
        #   accept - always accept incoming connections
        #   master - become master on incoming connections,
        #            deny role switch on outgoing connections
        lm accept;

        # Default link policy
        #   none    - no specific policy
        #   rswitch - allow role switch
        #   hold    - allow hold mode
        #   sniff   - allow sniff mode
        #   park    - allow park mode
        lp rswitch,hold,sniff,park;
}

#vim /usr/bin/bluepin
#!/bin/sh
#输出PIN码
echo "PIN:1234"
配置蓝牙PIN码文件

#vim /var/lib/bluetooth/A4:17:31:C7:9B:B6/pincodes
CC:08:8D:5B:26:94 1234
/var/lib/bluetooth/A4:17:31:C7:9B:B6/pincodes：A4:17:31:C7:9B:B6本地蓝牙设备MAC地址
#待连接蓝牙设备MAC地址CC:08:8D:5B:26:94
#1234：PIN码

#hcid /etc/bluetooth/hcid.conf
#rfcomm bind /dev/rfcomm0 CC:08:8D:5B:26:94 1
方式1：连接蓝牙设备，在我这不好用
#rfcomm conn /dev/rfcomm0 CC:08:8D:5B:26:94 1
方式2：连接蓝牙设备
#cat /dev/rfcomm0 &

嵌入式板子上蓝牙模块连接我的手机示意图：

连接过程中遇到的PIN码问题参考blog：http://blog.csdn.net/linuxheik/article/details/51923924
基于蓝牙传输文件