Android RIL CDMA旁支总结(1)_Android

Android RIL CDMA分支总结(1)

Android RIL CDMA分支总结

1. CDMA分支代码结构

reference-ril->libference-ril.so 主要负责modem通信（包含通话、上网、短信以及modem初始化功能等等）

rild -> rild? rild守护进程，是整个android ril层的入口点。

libril -> libril.so rild的共享库，驻留在rild中，完成和上层通信的工作，接受ril请求并传递给libreference-ril.so来通知modem，与此同时将其反馈回传给调用进程。

radiooptions -> radiooptions? 无线通信测试程序。

reference-cdma-sms -> cdma模组特殊定义用于cdma（evdo）通信使用，主要定义短信接口（实现短息的编码解码工作）。

2.AT从界面到模组流程

通话外例：

按通话图标->>

DialtactsActivity(4个Tab 分别由TwelveKeyDialer<拨号>、RecentCallsListActivity<最近联系人>，两个activity-alias DialtactsContactsEntryActivity<联系人>和DialtactsFavoritesEntryActivity<收藏>)

输入拨号号码

TwelveKeyDialer

????????mehod: Onclick

??????? placecall()

??????????? Intent intent =new Intent(Intent.ACTION_CALL_PRIVILEGED,

???????????????????????Uri.fromParts("tel",number,null));

?????????????????????? intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

?????????????????????? startActivity(intent);

启动拨号->>>>>>

intert.ACTION_CALL_PRIVILEGED实际字符串为android.intent.action.CALL_PRIVILEGED，通过查找知道了packegs/phone

下面的androidmanifest.xml中PrivilegedOutgoingCallBroadcaster activity-alias设置了intent-filter，所以需要找到其targetactivity为OutgoingCallBroadcaster。所以进入OutgoingCallBroadcaster的

??method:onCreate（）

? //如果为紧急号码马上启动intent.setClass(this, InCallScreen.class); startActivity(intent);

? Intent broadcastIntent = new Intent(Intent.ACTION_NEW_OUTGOING_CALL);

??????? if (number != null) broadcastIntent.putExtra(Intent.EXTRA_PHONE_NUMBER, number);

??????? broadcastIntent.putExtra(EXTRA_ALREADY_CALLED, callNow);

??????? broadcastIntent.putExtra(EXTRA_ORIGINAL_URI, intent.getData().toString());

??????? if (LOGV) Log.v(TAG, "Broadcasting intent " + broadcastIntent + ".");

??????? sendOrderedBroadcast(broadcastIntent, PERMISSION, null, null,

???????????????????????????? Activity.RESULT_OK, number, null);

???

Intent.ACTION_NEW_OUTGOING_CALL实际字符串为android.intent.action.NEW_OUTGOING_CALL，通过查找知道了packegs/phone下面的androidmanifest.xml中OutgoingCallReceiver Receiver接收此intent消息。找到OutgoingCallReceiver，执行

mothod:onReceive()函数

? Intent newIntent = new Intent(Intent.ACTION_CALL, uri);

??????? newIntent.putExtra(Intent.EXTRA_PHONE_NUMBER, number);

??????? newIntent.setClass(context, InCallScreen.class);

??????? newIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

《整个流程》

mothod:onCreate(第一次)/onNewIntent(非第一次)

? internalResolveIntent

??? placeCall(intent);

????? PhoneUtils.placeCall(mPhone, number, intent.getData());

??????? phone.dial(number);

????????? mCT.dial(newDialString);

??????????? dial(dialString, CommandsInterface.CLIR_DEFAULT);

????????????? cm.dial(pendingMO.address, clirMode, obtainCompleteMessage());//obtainCompleteMessage(EVENT_OPERATION_COMPLETE);

??????????????? send(rr);

????????????????? msg = mSender.obtainMessage(EVENT_SEND, rr);

????????????????? acquireWakeLock();

????????????????? msg.sendToTarget();

??????????????? RILSender.handleMessage()? //已经到系统java ril<gsm &cdma>处理部分

????????????????? case EVENT_SEND:

??????????????????? ...

??????????????????? s.getOutputStream().write(dataLength);???????????????????

??????????????????? s.getOutputStream().write(data);//从这里流程跑到下面ril.cpp中监听部份

RIL层

rild守护进程 rild->main=>RIL_startEventLoop

????? //建立事件循环线程

??? ret = pthread_create(&s_tid_dispatch, &attr, eventLoop, NULL);

????? //注册进程唤醒事件回调

????? ril_event_set (&s_wakeupfd_event, s_fdWakeupRead, true,

??????????????? processWakeupCallback, NULL);

????? rilEventAddWakeup (&s_wakeupfd_event);

????? //建立事件循环

????? ril_event_loop

??????? for (;;) {

????????? ...

????????? n = select(nfds, &rfds, NULL, NULL, ptv);

????????? // Check for timeouts

????????? processTimeouts();

????????? // Check for read-ready

????????? processReadReadies(&rfds, n);

????????? // Fire away

????????? firePending();

??????? }

?????? funcs = rilInit(&s_rilEnv, argc, rilArgv);//实际是通过动态加载动态库的方式执行reference-ril.c中的RIL_Init

????

????? //单独启动一个线程读取串口数据

?????? ret = pthread_create(&s_tid_mainloop, &attr, mainLoop, NULL);

?????? fd = open (s_device_path, O_RDWR);//打开虚拟模组

?????? ret = at_open(fd, onUnsolicited);? //设置模组主动上报

???????ret = pthread_create(&s_tid_reader, &attr, readerLoop, &attr);

?????? RIL_requestTimedCallback(initializeCallback, NULL, &TIMEVAL_0);

reference-ril.so 处理方式（rild动态加载libreference-ril.so库）

????? (处理模型)

????? >static void request(x x x)

???????? switch(x)??? //判断请求类型

????????????? request_dail //电话请求

????????????????? function()? //请求处理函数AT指令

???? 设置事件回报//

参考文献：

http://blog.csdn.net/basonjiang_sz/archive/2011/03/17/6255881.aspx

Android GSM驱动模块详细分析（作者：熊猫哥哥）