基于MTK平台的Android手机Modem驱动开发研究

发布时间：2018-09-17 10:03

【摘要】：自第一部Android智能手机诞生以来,Android操作系统不断优化,其以开放性、跨平台性、并行运行模式和非垄断性深受国际商业开发人员的追捧。目前,安卓设备市场占有率已经达到世界市场的首位,需求量日益增长,各国公司也在积极研发搭载Android操作系统的设备,以期从中获得丰厚的收益。以Linux为基础的Android是一种开放源码操作系统并且属于BSD协议,这样既开放又能适应商业开发。手机等移动设备的运行“大脑”——处理器研发企业,也在不断地加大研发力度,谋求市场的收益份额。廉价、低功耗、高性能、兼容性强等成为各个手机制造公司对移动终端处理器的优先选择。MTK芯片凭着较好的性价比成功抢占了大部分手机CPU市场,本文项目所使用的处理器即是基于MTK平台的芯片。智能手机基本上是由两部分电路构成:第一部分是高层处理电路部分,它类似于我们使用的PC电脑;其次就是基带电路部分,基带电路是手机最核心的构成部分,我们使用的Modem就属于这一部分,Android电话系统支持各种手机网络制式,它们就是围绕底层通过Modem硬件搭建而成。我们用手机打电话、发短消息和连接网络这些行为,都是通过上层的系统处理后并给基带部分发送指令,然后交由基带部分进行处理执行,最后基带部分在手机和无线网络间建立起的一条逻辑通道内完成处理,手机的语音通话、短消息及网络运行数据包也通过这个通道向外输送。论文在分析相关的开发技术和理论后,进行了SIM2依赖SIM1的锁卡开发实践。实践表明,基于MTK的Modem系统开发能够使Android手机电话系统正常工作,满足定制化要求。MTK的技术方案简洁有效,有利于商业开发的快速有效实现。
[Abstract]:Since the birth of the first Android smartphone, the Android operating system has been continuously optimized. Its openness, cross-platform, parallel operation mode and non-monopoly are highly sought after by international commercial developers. The market share of Android devices has reached the top in the world market and demand is growing, and companies around the world are actively developing devices that run on the Android operating system in the hope of making a lot of money from them. Android based on Linux is an open source operating system and belongs to BSD protocol, which is open and suitable for commercial development. Mobile devices such as mobile phones run "brain"-processor R & D companies, but also continue to increase R & D efforts to seek market share. Low cost, low power consumption, high performance and strong compatibility have become the priority choice of mobile terminal processor for various mobile phone manufacturers. MTK chips have successfully captured most of the mobile phone CPU market with good performance and price ratio. The processor used in this project is a chip based on MTK platform. The smartphone is basically made up of two circuits: the first is the high-level processing circuit, which is similar to the PC computer we use, and the second is the baseband circuit, which is the core component of the phone. The Modem that we use belongs to this part of the phone system supports various mobile phone network standards, they are built around the bottom layer through Modem hardware. We use our cell phones to make phone calls, send short messages, and connect to the network, all of which are processed through the upper layer of the system and sent instructions to the baseband part, which is then sent to the baseband part for processing and execution. Finally, the baseband part is processed in a logical channel between the mobile phone and the wireless network. The mobile phone voice calls, short messages and network running data packets are also transmitted outward through this channel. After analyzing the relevant development technology and theory, the paper carries on the development practice of the lock card that SIM2 depends on SIM1. The practice shows that the development of Modem system based on MTK can make the Android mobile phone telephone system work normally and meet the requirements of customization. The technical scheme is simple and effective, which is conducive to the rapid and effective realization of commercial development.
【学位授予单位】：首都经济贸易大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP311.52;TP316

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