外文翻譯---車載無(wú)線傳感器網(wǎng)絡(luò)監(jiān)測(cè)系統(tǒng)設(shè)計(jì)-wenkub
2023-05-19 08:40:35 本頁(yè)面
【正文】 are. In order to improve the munication module of the intelligent level, in the design, its function is not limited to the realtime data display, all of the data collection by the monitoring software by sending a request signal to the trigger. Considering the original data for subsequent processing and indepth analysis of the vehicle system, can accurately judge, software has also added data preservation of the document and data file display function. Generally speaking, the whole work are controlled by the host monitoring software, the working process of every node of the work is the need of human participation. 2 hardware system design chip introduction MC13192with standard, the operating frequency ～ GHz, data transmission rate of 250kbps, using 0QPSK debugging mode. This featurerich twoway transceiver with a data modem which can be in the ZigBee technology application. It also has an optimized digital core, helps to reduce the MCU processing power, shorten the cycle of execution. The main control MCU choose HCS08series of low power, high performance microprocessor MC9S08GB60. The processor has a 60Application of KB programmable Flash 、 4 KB RAM,10 ADC,8 channel2 asynchronous serial munication interface ( SCI ),1 synchronous serial interface ( SPI ) and I2C bus module, can fully meet the requirement of vehicle gateway and node processor requirements. MCl3192and MC9S08GB60hardware connection MC13192and MC9S08GB60 hardware connection diagram as shown in figure 2. The MC13192control and data transmission on 4 wire serial peripheral interface ( SPI ) is pleted, the4interface signals were MOSI, MISO, SPICLK. The main control MCU through the control signal exiting sleep mode or hibernation mode, through to reset the transceiver, through the RXTXEN to control the data sending and receiving, or force the transceiver into idle mode. The sensor output analog signal through MCU 8 Channel10 bit ADC conversion input to MCU. MCU via SPI MC13192to read and write operation, and the sensor to collect the signal processed by MC13192launch out. The MC13192 interrupt IRQ interrupt register through the pins and to judge the type of interrupt. MC908GB60 pin to control the MC13192 into a different mode of operation .Control of the sensor signal from the MC13192receiving antenna in, transmitted via SPI to MCU, after MCU judgment after processing through the GPIO port is transmitted to the sensor, plete control of the sensor. At the same time, MCU MC13192transceiver control and the MAC layer operation. The 3system software design overall software design The software design is the design of the core, the key lies in the overall framework of software and data structure design. An important factor to consider is a efficiency, another is to design the clarity. System software consists of the gateway node and the sensor node is posed of two parts, the two parts are needed to plete the SMAC protocol transplantation, and according to the different needs for the upper munication applications with API interface function. Because the SMAC protocol stack programming model using hierarchical design, only the underlying PHY and MAC program level and related hardware, and work layer and application layer procedures is not affected by hardware effects. SMAC in different hardware platform transplantation only need to modify the PHY and MAC layer, each layer can shield the hardware differences directly run. As shown in Figure 3, the design of the software for system platform layer, protocol layer and application layer 3layer. At the same time, defines 3API interface: system layer interface, protocol layer and application layer interface. System level interface defines a hardware register mapping, so C language to be able to directly access the hardware registers to control hardware. System platform based on realtime operating system μC/II protocol layer, to provide system services Hardware driving module provides the hardware driver, all of the hardware control through the module to provide services. Platform layer protocol layer interface protocol layer to provide services. Protocol layer is based on the IEEE physical layer and lin
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