mtk硬件启动关闭蓝牙功能的项目：mtk 上层操作GPIO应用示例

mtk硬件启动关闭蓝牙功能的项目：mtk上层操作GPIO应用示例
项目要求：
接上篇：

1：蓝牙按键（KCOL2+KROW1)长按3秒，软件上控制GPIO144拉高2秒后关闭，蓝牙就开启并搜索配对。同时拉高GPIO98，控制音频的模拟开关切换蓝牙音源。

2：蓝牙在工作状态下，给出个1.8V的高电平，给GPIO145用来检测蓝牙的工作状态。

3：蓝牙在工作装态下想要重新配对，在长按蓝牙按键3秒，控制GPIO97拉高3秒后关闭，蓝牙模块在收到这个信号后执行清空列表和重新搜索功能。

4：蓝牙按键（KCOL2+KROW1)长按8秒，软件上控制GPIO144拉高2秒后关闭，蓝牙模块就关闭了。

本篇讲述如何控制。
1,
设置蓝牙控制GPIO为初始状态，GPIO97 98 144全部设置为GPIOOUT，且下拉。GPIO145设置为GPIOIN。

2，侦测开机事件boot_completed，在这个intent处理程序中，检查bt的switched的状态，如果为//checked状态，那么打开蓝牙，如果为非checked状态，则不理会。
第一步，在AndroidManifest.xml中添加：
<receiverandroid:name="BootCompletedReceiver">
<intent-filter>
<actionandroid:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>
</receiver>

不要忘记加入权限：
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

另外，接收BOOT_COMPLETED，不能安装，必须直接push到/system/app/

在当前包下面建立BootCompletedReceiver.java文件
我们定义两个SharedPreferences来保存系统的bt和ethernet状态，因为省电需求，我们每次开机都保持Ethernet和BT为关闭。
packagecom.mediatek.oobe;

importandroid.app.Activity;
importandroid.content.BroadcastReceiver;
importandroid.content.Context;
importandroid.content.Intent;
importandroid.content.SharedPreferences;
importandroid.util.Log;

publicclassBootCompletedReceiverextendsBroadcastReceiver
{
@Override
publicvoidonReceive(Context
mContext, Intent arg1) {
Log.e("zcfdebug","wewill
set BT and ethernet default to off!");
SharedPreferencesbtSwitchSharedPreferences=mContext.getSharedPreferences("OOBE_Settings",Activity.MODE_PRIVATE);
SharedPreferences.EditormEditor=btSwitchSharedPreferences.edit();
mEditor.putString("btSwitch","0");
mEditor.putString("eth0Switch","0");
}
}

//在这个类里面，我们要检测蓝牙的当前设置是否为开或者关。
3,我们打开图形界面，显示以太网卡开关和蓝牙开关的时候，需要根据这里的SharedPreferences来决定开关显示状态，这个需要在开关的Enable类的初始化完成：
在蓝牙的BtEnabler类里面增加三个私有成员
privateSharedPreferencesbtSwitchSharedPreferences;
privateStringbtSwitchStatusString;
privateSharedPreferences.EditormEditor;

在Enable类的初始化函数中间根据SharedPreferences的状态设置UISwitch开关状态。
publicBtEnabler(Context
context, Preference switchPref) {
mContext=
context;
mBtSwitchPre=
(SwitchPreference) switchPref;
//mBtSwitchPre.setChecked(false);
booleanret=
EmGpio.gpioInit();
btSwitchSharedPreferences=context.getSharedPreferences("OOBE_Settings",Activity.MODE_PRIVATE);
btSwitchStatusString=btSwitchSharedPreferences.getString("btSwitch",null);
mEditor=btSwitchSharedPreferences.edit();
if(btSwitchStatusString=="0"){
mBtSwitchPre.setChecked(false);
}elseif(btSwitchStatusString=="1"){
mBtSwitchPre.setChecked(true);
}else{
mBtSwitchPre.setChecked(false);
}

}

在用户打开关闭蓝牙的处理函数中间，进行SharedPreferences的设置
OnPreferenceChangeListenermBtPreferenceChangeListener=newOnPreferenceChangeListener()
{

@Override
publicbooleanonPreferenceChange(Preference
preference, Object newValue) {
//TODOAuto-generated
method stub
booleanisChecked
= (Boolean) newValue;
if(isChecked){
mEditor.putString("btSwitch","1");
}else{
mEditor.putString("btSwitch","0");
}
setBtEnable(isChecked);
}
returntrue;
}
};
对于以太网，因为其他程序也会进行设置，所以，这里也是类似操作。
（注意，为了系统省电的操作，我们没有使用系统所提供的EthernetManager的开关，而是直接关闭电源）

4,接收系统发出的android.intent.action.onkey.BT_START
第一步，在AndroidManifest.xml中添加：
<receiverandroid:name="BtStartReciver">
<intent-filter>
<actionandroid:name="android.intent.action.onkey.BT_START"/>
</intent-filter>
</receiver>

在当前包里面建立BtStartReciver.java，内容如下
packagecom.mediatek.oobe;

importandroid.app.PendingIntent;
importandroid.content.BroadcastReceiver;
importandroid.content.Context;
importandroid.content.Intent;
importandroid.util.Log;

public classBtStartReciver extends BroadcastReceiver {
@Override
public voidonReceive(Context mContext, Intent arg1) {
Log.e("zcfdebug","wewill set BT according preference!");
}
}

在这里文件里，我们将按照项目要求，如果当前蓝牙处于关的状态，则打开蓝牙。否则，不理会。
蓝牙开关状态保存在设置界面中，而且第一次开机必须为关闭状态。
首先我们读取蓝牙的SharedPreferences，判断当前的BT是否为关闭状态，如果是，那么打开蓝牙，并且更新SharedPreferences。代码如下：

packagecom.mediatek.oobe;

importcom.mediatek.engineermode.io.EmGpio;

importandroid.app.Activity;
importandroid.app.PendingIntent;
importandroid.content.BroadcastReceiver;
importandroid.content.Context;
importandroid.content.Intent;
importandroid.content.SharedPreferences;
importandroid.util.Log;

publicclass BtStartReciver extends BroadcastReceiver {
privateSharedPreferences btSwitchSharedPreferences;
privateString btSwitchStatusString;
privateSharedPreferences.Editor mEditor;

@Override
publicvoid onReceive(Context mContext, Intent arg1) {
Log.e("zcfdebug","wewill set BT according preference!");
btSwitchSharedPreferences=mContext.getSharedPreferences("OOBE_Settings",Activity.MODE_PRIVATE);
btSwitchStatusString=btSwitchSharedPreferences.getString("btSwitch",null);
mEditor=btSwitchSharedPreferences.edit();
if(btSwitchStatusString=="0"){
// mBtSwitchPre.setChecked(false);
mEditor.putString("btSwitch","1");
setBtEnable(true);
}
}

privatevoid setBtEnable(boolean isChecked){
EmGpio.setGpioOutput(144);
EmGpio.setGpioOutput(98);

if(isChecked){
newThread(new Runnable() {
publicvoid run() {
Log.e("zcfdebug","weset GPIO 144 and 98 high");
EmGpio.setGpioDataHigh(144);
EmGpio.setGpioDataHigh(98);
Log.e("zcfdebug","wewill pull 144 2senconds");
try{
Thread.sleep(2000);
}catch (InterruptedException e) {
//TODO Auto-generated catch block
e.printStackTrace();
}
Log.e("zcfdebug","wewill pull 144 down");
EmGpio.setGpioDataLow(144);

}
}).start();
}else{
newThread(new Runnable() {
publicvoid run() {
Log.e("zcfdebug","weset GPIO 144 high and 98 low");
EmGpio.setGpioDataHigh(144);
EmGpio.setGpioDataLow(98);
Log.e("zcfdebug","wewill pull 144 2senconds");
try{
Thread.sleep(2000);
}catch (InterruptedException e) {
//TODO Auto-generated catch block
e.printStackTrace();
}
Log.e("zcfdebug","wewill pull 144 down");
EmGpio.setGpioDataLow(144);

}
}).start();
}

}
}

4,接收系统发出的android.intent.action.onkey.BT_STOP
与上面的Start方法一样的，就不累述。

5，上面的GPIO操作才有的mtk提供的方式，jni方法集成在系统so文件中libem_gpio_jni.so
其接口代码如下EmGpio.java：
/*Copyright Statement:
*
* Thissoftware/firmware and related documentation ("MediaTekSoftware") are
*protected under relevant copyright laws. The information containedherein
* isconfidential and proprietary to MediaTek Inc. and/or its licensors.
*Without the prior written permission of MediaTek inc. and/or itslicensors,
* anyreproduction, modification, use or disclosure of MediaTek Software,
* andinformation contained herein, in whole or in part, shall be strictlyprohibited.
*
*MediaTek Inc. (C) 2010. All rights reserved.
*
* BYOPENING THIS FILE, RECEIVER HEREBY UNEQUIVOCALLY ACKNOWLEDGES ANDAGREES
* THATTHE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEKSOFTWARE")
*RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TORECEIVER ON
* AN"AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY ANDALL WARRANTIES,
*EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIEDWARRANTIES OF
*MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
*NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TOTHE
*SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
*SUPPLIED WITH THE MEDIATEK SOFTWARE, AND RECEIVER AGREES TO LOOK ONLYTO SUCH
* THIRDPARTY FOR ANY WARRANTY CLAIM RELATING THERETO. RECEIVER EXPRESSLYACKNOWLEDGES
* THATIT IS RECEIVER'S SOLE RESPONSIBILITY TO OBTAIN FROM ANY THIRD PARTYALL PROPER LICENSES
*CONTAINED IN MEDIATEK SOFTWARE. MEDIATEK SHALL ALSO NOT BERESPONSIBLE FOR ANY MEDIATEK
*SOFTWARE RELEASES MADE TO RECEIVER'S SPECIFICATION OR TO CONFORM TO APARTICULAR
*STANDARD OR OPEN FORUM. RECEIVER'S SOLE AND EXCLUSIVE REMEDY ANDMEDIATEK'S ENTIRE AND
*CUMULATIVE LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASEDHEREUNDER WILL BE,
* ATMEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE ATISSUE,
* ORREFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY RECEIVERTO
*MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
*
* Thefollowing software/firmware and/or related documentation ("MediaTekSoftware")
* havebeen modified by MediaTek Inc. All revisions are subject to anyreceiver's
*applicable license agreements with MediaTek Inc.
*/

/*Copyright Statement:
*
* Thissoftware/firmware and related documentation ("MediaTekSoftware") are
*protected under relevant copyright laws. The information containedherein
* isconfidential and proprietary to MediaTek Inc. and/or its licensors.
*Without the prior written permission of MediaTek inc. and/or itslicensors,
* anyreproduction, modification, use or disclosure of MediaTek Software,
* andinformation contained herein, in whole or in part, shall be strictlyprohibited.
*/
/*MediaTek Inc. (C) 2010. All rights reserved.
*
* BYOPENING THIS FILE, RECEIVER HEREBY UNEQUIVOCALLY ACKNOWLEDGES ANDAGREES
* THATTHE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEKSOFTWARE")
*RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TORECEIVER ON
* AN"AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY ANDALL WARRANTIES,
*EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIEDWARRANTIES OF
*MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
*NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TOTHE
*SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
*SUPPLIED WITH THE MEDIATEK SOFTWARE, AND RECEIVER AGREES TO LOOK ONLYTO SUCH
* THIRDPARTY FOR ANY WARRANTY CLAIM RELATING THERETO. RECEIVER EXPRESSLYACKNOWLEDGES
* THATIT IS RECEIVER'S SOLE RESPONSIBILITY TO OBTAIN FROM ANY THIRD PARTYALL PROPER LICENSES
*CONTAINED IN MEDIATEK SOFTWARE. MEDIATEK SHALL ALSO NOT BERESPONSIBLE FOR ANY MEDIATEK
*SOFTWARE RELEASES MADE TO RECEIVER'S SPECIFICATION OR TO CONFORM TO APARTICULAR
*STANDARD OR OPEN FORUM. RECEIVER'S SOLE AND EXCLUSIVE REMEDY ANDMEDIATEK'S ENTIRE AND
*CUMULATIVE LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASEDHEREUNDER WILL BE,
* ATMEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE ATISSUE,
* ORREFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY RECEIVERTO
*MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
*
* Thefollowing software/firmware and/or related documentation ("MediaTekSoftware")
* havebeen modified by MediaTek Inc. All revisions are subject to anyreceiver's
*applicable license agreements with MediaTek Inc.
*/

packagecom.mediatek.engineermode.io;

publicclass EmGpio {
publicstatic native int getGpioMaxNumber();

publicstatic native boolean gpioInit();

publicstatic native boolean gpioUnInit();

publicstatic native boolean setGpioInput(int gpioIndex);

publicstatic native boolean setGpioOutput(int gpioIndex);

publicstatic native boolean setGpioDataHigh(int gpioIndex);

publicstatic native boolean setGpioDataLow(int gpioIndex);

publicstatic native int getCurrent(int hostNumber);

publicstatic native int newGetCurrent(int hostNumber, int opcode);

publicstatic native boolean setCurrent(int hostNumber, int currentDataIdx,
intcurrentCmdIdx);

publicstatic native boolean newSetCurrent(int hostNumber, int clkpu,
intclkpd, int cmdpu, int cmdpd, int datapu, int datapd,
inthopbit, int hoptime, int opcode);

publicstatic native boolean setSd30Mode(int hostNumber, int sd30Mode,
intsd30MaxCurrent, int sd30Drive, int sd30PowerControl);

static{
System.loadLibrary("em_gpio_jni");

}
}
注意：路径和类名不能修改。

下面调试及可。