【正文】 application related, including point to point agreement (PPP), the user datagram/transmission control protocol/Inter protocol (UDP and TCP/IP), target exchange protocol (OBEX), wireless application protocol (WAP), wireless application environment (WAE), vCard, vCal, infrared mobile munication (IrMC). Choose the specific contents of the protocol layer by application system choose according to need In addition to the above agreement layer outside, bluetooth protocol stack shall include two interface: one is the host controller interface (HCI), used for baseband controller, link controller and access hardware state and control regiter, provides the mand interface。 根據(jù)上述分析 ,可以得到用于智能傳感器的嵌入式藍牙 SoC 器件的電路結(jié)構(gòu)。當需要使用藍牙通信發(fā)送數(shù)據(jù)或接收數(shù)據(jù)時 ,用戶程序只需調(diào)用 LMP軟件模塊即可。 根據(jù)上述結(jié)論 ,提出一種具有開放使用戶協(xié)議的嵌入式藍牙 SoC 模塊結(jié)構(gòu)。 由以上分析可以得出結(jié)論： ① 智能傳感器的數(shù)據(jù)傳輸量比較小 ,不需要進行壓縮或編碼處理 ,可以設(shè)置在 1K字節(jié)以下。 ④ 數(shù)據(jù)傳輸。處理的結(jié)果作為數(shù)據(jù)采集電路的輸入 信號。用戶系統(tǒng) CPU屬于串行工作方式 ,因此 ,在大數(shù)據(jù)量的通信過程中 ,如何完成系統(tǒng)的其它功能 ,是 SoC 結(jié)構(gòu)設(shè)計的一個重要方面。在嵌入了藍牙通信棧的 SoC 中 ,通信是系統(tǒng)的一個功能 ,SoC 還需要實現(xiàn)系統(tǒng)的其它功能。藍牙測試模塊主要提供無線層和基帶層的認證和一致性規(guī)范 ,同時還管理產(chǎn)品的生產(chǎn)和售后的測試 ,為可選模塊。 它由微處理器 (CPU)、無線收發(fā)器 (RF)、基帶控制器 (BB)、閃存 (Flash程序存儲器 )、通用異步收發(fā)器 UART、通用 串行接口 USB及藍牙測試模塊組成。 嵌入式藍牙系統(tǒng)是將 RF 和基帶部分集成在一塊芯片上 ,單芯片藍牙硬件模塊結(jié)構(gòu)。鏈路管理協(xié)議用來對鏈路進行設(shè)置和控制 ,并負責建立和撤銷各藍牙設(shè)備間的連接、功率控制以及認證和加密 ,同時還控制藍牙設(shè)備的工作狀態(tài) (保持 hold 、休眠park 、呼吸 sniff 和活動 active )。通過 的微波 ,實現(xiàn)數(shù)據(jù)流的過濾和傳輸。用于提供音頻通信的處理規(guī)范和相應(yīng)的控制命令。應(yīng)用規(guī)范則介紹了實現(xiàn)特定應(yīng)用模型 ,描述了各層協(xié)議間的協(xié)同機制 ,從而提供了技術(shù)實現(xiàn)的縱向體系結(jié)構(gòu)。每一個語音通道支持 64Kbps 的同步話音。 ① 藍牙工作在全球通用的 ISM(Industrial ,Scientific and Medical)免付費、免申請的無線電頻段。 智能傳感器的藍牙技術(shù)與 SoC結(jié)構(gòu)設(shè)計 藍牙技術(shù)是一種無線數(shù)據(jù)與數(shù)字通信的開放性規(guī)范。 ② 采用快速確認和跳頻技術(shù) ,以確保鏈路的穩(wěn)定。異步通道支持最大速率為 721Kbps 、反向應(yīng)答速率為 的非對稱連接 ,或者是 的對稱連接。 藍牙協(xié)議包括核心協(xié)議層、替代電纜協(xié)議層、電話控制協(xié)議層和選用協(xié)議層。 ④ 選用協(xié)議。藍牙協(xié)議提供了有關(guān)藍牙收發(fā)器的各項技術(shù)指標。鏈路管理層的主要功能由軟件完成 ,鏈路管理器電路提供運行于藍牙設(shè)備的處理器中的軟件。在嵌入式藍牙器件中 ,硬件結(jié)構(gòu)可分為鏈路管理器、鏈路控制器與 RF 模塊 3部分 ,負責處理 LMP層、基帶層與 RF 層的協(xié)議。其中藍牙基帶控制器是藍牙硬件模塊的關(guān)鍵模塊。 3 嵌入藍牙協(xié)議棧的 SoC 結(jié)構(gòu)設(shè)計 根據(jù)上述藍牙協(xié)議棧硬件結(jié)構(gòu)可以看出 ,如果使用 SoC 結(jié)構(gòu)設(shè)計藍牙協(xié)議棧 ,則可以實現(xiàn)嵌入藍牙通信模塊 ,同時向用戶開放內(nèi)部 CPU的目的。由于 CPU 串行結(jié)構(gòu)的特點 ,當系統(tǒng)需要同時啟用通信功能和其它重要功能時 (例如實施系統(tǒng)的數(shù)據(jù)采集操作等 ),就需要使用適當?shù)姆椒ㄟM 行協(xié)調(diào)。例如 ,使用藍牙技術(shù)傳輸圖像時 ,其中的通信系統(tǒng)必須保持連續(xù)工作狀態(tài) ,同時 ,還需要 SoC 中設(shè)計大量的 Flash 存儲器。 ② 數(shù)據(jù)采集。在控制系統(tǒng)中 ,智能傳感器采集并整理好的數(shù)據(jù) ,需要傳輸給系統(tǒng)的核心控制器或其它控制單元。 ② 為了保證控制系統(tǒng)的安全可靠性 ,需要把上層處理協(xié)議變?yōu)橛脩魧訁f(xié)議 ,由用戶自行編寫。 RF 收發(fā)器、基帶控制器和藍牙協(xié)議 ROM共同組成藍牙協(xié)議棧。 LMP協(xié)議由兩部分組成： ① 軟件。 把藍牙協(xié)議棧嵌入到智能傳感器中 ,將為控制系統(tǒng)提供十分靈活的組成方式；同時 ,通過采用相應(yīng)的安全措施 ,可以提高系統(tǒng)的安全性和可靠性。 The other is a and baseband processing part directly connected audio interface to transfer audio data. In the bluetooth protocol stack, HCI above part usually use software to realize, including the logical link control and adaptive agreement L2CAP, serial simulation RFCOMM, link management protocol (LMP), telephone alternative agreement and choose agreement。 Group head and load cycle redundancy check (CRC), group head and charge forward error correction code FEC processing, encryption and decryption process, etc., and can provide from baseband controller to other chip interface, etc. RISC CPU usually adopts the structure of embedded microcontroller processor, such as ARM7TDMI microprocessor, can meet the bluetooth core agreement of highspeed processing and a large number of data bit stream processing. Flash memory used to store all of the baseband and link management protocol software. SRAM as CPU run space, in the work of the Flash software call SRAM in processing. Radio frequency transceiver is responsible for receiving or send high frequency munication signal. UART and USB interface is provided with to HCI host controller interface transmission layer physical connections, is the upper level protocol and bluetooth hardware modules munication channel. Bluetooth test module mainly provide wireless layer and base layer of authentication and consistency norms, but also management products production and aftersale test for optional module. 3 embedded bluetooth protocol stack structure design of SoC According to the above bluetooth protocol stack hardware structure can see, if use SoC structure design bluetooth protocol stack, it can realize embedded bluetooth munication module, and at the same time users to open internal CPU purpose, in the design of embedded bluetooth protocol SoC structure, need to consider the following questions (1) the data processing ability and speed. Data processing ability mainly reflected in two aspects: one is the data buffer memory scale, the other is a data processing algorithm to the extent of the support. Data processing speed is an important question. Data processing speed not only and system clock frequency about, still and CPU and internal bus is directly related to the structure. (2) the munication operation and system operation of the relationship. In the embedded bluetooth munication stack SoC, munication is a function of the system, SoC need to other features of the system. Due to the CPU serial structure characteristics, when the system needs at the same time enable munication function and other important function (such as the implementation of the data acquisition system operation, etc), you need to use appropriate methods to coordinate. In fact this is embedded bluetooth SoC device system real time problem. (3) power loss of the device. The design of SoC power loss is an important problem. In addition to the corresponding technology to achieve the minimum power loss problem outside, still must be through the system structure design reduce the system power loss. For power loss have speci