树莓派LoRa教程.docx

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上海大学计算机组成原理历年试卷，文档形式，内部资料。[X]补=0010011Y]补=00.11001:[-Y]补=10011(7分,过程4分,结果3分)被除数商说明0010011000000被除数与除数同号+1100111+[Y]补I1101000000*0余数语除数异号,商上011101000000*00左移1位011001上次商0,+Y]补011010000*01余数与除数同号,商10011010000*010左移1位+1100111上次商1,+Y]补0000001000*011余数与除数同号,商1000001000*0110左移1位+11001上次商1,十[-Y]补110100100*010余数与除数异号,商0+0010010上次商0,+Y]补11010110*01100余数与除数异号,商01010110冰011000左移1位011001商末位置1结果:0.110012、已知替换算法LRU当前的信息块在登记表中的排序为0、1、2、3、4、5,画图依次表示出在先后使用3、1、4时登记表中信息块排序的变化过程(0)(组分别是3、3、4分)原始使用3使用1使用440原则:把最近使用的资快提到最前面,替换最下面的3、已知内存地址为0~1M单元 Cache地址为01k单元,设每块为256个单元,设计一组组相连 Cache组织。(1)给出数学描述和说明(10)(2)出简图(图中的 Cache块和内存块应标明具体地址)(10描述(10分)具体分两组组相连映像方式是以组为单位,组与组间是直接映像组内是全相连映像例如, cache为4块将 cache分为两组每组512字节,分为两块此时取k=0,1则第j块内存地址映射为j=(i mod 2)*2+kk=0, 1图10分第1页(共6页)上海大学2003~2004学年秋季学期试卷(A卷)课程名:计算机组成原理学分:4(闭卷学号:姓名:院、系:成绩题号四五六七得分得、填空:(每格2分,共20分)l、存储器总体上按照存储介质分为2、存储器接到读/写命令到完成读/写操作所需要时间称为。存储器进行两次连续读/写操作所需要的最小间隔时间称为3、半导体动态RAM靠存储信息。4、直接由计算机硬件执行的程序是5、组成一个32K×8的存储器当分别选用1K×4位、16K×1位、2K×8位的三种不同规格的存储芯片时,各需片。得分、简答题(每题5分,共35分)1、画图并说明32位浮点数的规格化表示,并举例说明其精度及数据范围2、只读存储器分为那几类,各自的功能3、画图表小静态存储器地址信号首先选通时Adr、CS、Dout的开关特性信号次序)。并简述为什么试卷纸第2页(共6页)4、简述为保持 Cache和主存一致性而定义的 Cache的两种写入方式5、简述动态存储器刷新的两种工作方式6、简述段式和页式虚拟存储器的特点7、读写存储器的分类,各自的特点得分三、综合题(45)设X=0.10011,Y=0.11001写出一种两位定点乘法和一种位定点除法的计算过程并给出计算结果(15)FCLLUFLT.TV-了k平小T一廿性XJ试卷纸第3页(共6页)2、已知替换算法LRU当前的信息块在登记表中的排序为0、1、2、3、4、5,画图依次表示出在先后使用3、1、4时登记表中信息块排序的变化过程(10)。命题纸使用说明:1、字迹必须端正,以黑色碳素墨水书写在框线内,文字与试卷纸第4页(共6页)3、已知内存地址为0-M单元, Cache地址为0~1k单元设每块为256个单元,设计一组组相连 Cache组织。(1)给出数学描述和说明(10)(2)画出简图(图中的 Cache块和内存块应标明具体地址)(10)命题纸使用说明:1、字迹必须端正,以黑色碳素墨水书写在框线內,文字与草稿纸第5页(共6页命题纸使用说明:1、字迹必须端正,以黑色碳素墨水书写在框线内,文字与草稿纸第6页(共6贝丿

基于栅格地图的模型，势场法的原理，设置初始点与目标点的路径规划图个人心血

python 实现的UDP通信，利用生产者消费者模式，通过线性安全队列实现多线程同步。如果要实现在不同电脑上通信，需要关闭防火墙。默认的是hostlocal（可以读程序）。基于python2.7。未打包exe。

MFC版本的离线地图Demo，里面还带有离线地图生成工具。进过几天的努力，我测试过了网上很多的例子，也找了很多离线地图下载工具。很多都不能用，有些还必须给钱注册。这工具是破解版，希望对你会有帮助。

用matlab编程实现对数据离群点的检测，有数据源

电子滤波器设计内容包括如何选择滤波器的响应曲线，低通、高通、带通及带阻滤波器的设计，LC滤波器的设计，数字滤波器设计，有限冲激响应滤波器设计，无限冲激响应滤波器设计，多速率数字滤波器设计，开关电容滤波器设计，微波滤波器设计，等等

使用CC2591作为CC2530的功放, CC2591 PAThe absolute maximum ratings and operating conditions listed in the CC2530 datasheet [1]and the CC2591 datasheet [4] must be followed at all times. Stress exceeding one or more ofthese limiting values may cause permanent damage to any of the devicesNote that these characteristics are only valid when using the recommended register settingspresented in Section 4.6 and in Chapter 8, and the CC2530 - EM reference designOperating Frequency240524835MHzOperating Supply Voltage2036VOperating Temperature-40CTC=25C, VDD=3.0V, f=2440 MHz if nothing else is stated. All parameters are measuredon the CC2530-Cc2591EM reference design [11] with a 50 Q2 loadReceive CurrentWait for sync, -90 dBm input levelWait for sync, -50 dBm input level24mATXPOWER OXE5166mATXPOWER OXD5149mATXPOWER OXC5138mATXPOWER OXB5127mATransmit currentTXPOWER OXA5115ATXPOWER = 0X95100mATXPOWER = 0X8594ATXPOWE=0×75mATXPOWE=0×6579APower Down Current PM2UAISTRUMENTSPage 3 of 19SWRA308ATC=25C, Vdd=3.0V, f= 2440 MHz if nothing else is stated. All parameters are measuredon the CC2530-CC2591 EM reference design with a 50 Q2 loadReceive Sensitivity HGM 1 %PER, IEEE 802. 15.4[6] requires -85 dBm-988dBmReceive Sensitivity LGM1 PER, IEEE 802. 15.4 [6] requires -85 dBm-90.4dBmSaturationlEEE 802.15. 4 [6] requires-20 dBm10dBmWanted signal 3 db above the sensitivity levelIEEE 802.15.4 modulated interferer at ieee 802.15.4 channelsInterferer Rejection+5 MHz from wanted signal, IEEE 802. 15. 4 [6] requires 0 dBdB+10 MHz from wanted signal, IEEE 802. 15. 4 [6] requires 30 dB49dB+20 MHz from wanted signal wanted signal at- 82d BmdBdue to in the external lna and the offset in cc2530 the rssi readouts from cc2530CC2591 is different from rssi offset values for a standalone cc2530 design the offsetvalues are shown in table 4.4High Gain Mode79LoW Gain mode67Real rssi Register value-Rssl offsetISTRUMENTSPage 4 of 19SWRA308ATc=25C, Vdd=3.0V, f=2440 MHz if nothing else is stated All parameters are measuredon the CC2530-CC2591 EM reference design with a 50 Q2 load Radiated measurements aredone with the kit antennaRadiated Emissionwith TXPOWer Oxe5Conducted 2. RF (FCC restricted band)-462|dBmConducted 3. RF(FCC restricted band46.5 dBmComplies withFCC 15.247. SeeChapter 7 for moredetails about regulatoryRadiated 2.RF(FCC restricted band)42.2dBmrequirements andcomplianceIEEE 802.15.4[6]requires max.35%%Measured as defined by IEEE 802.15. 4 6TXPOWER OxE5. f= EEE 802.15. 4 channels13TXPOWER= OXD5. f= EEE 802.15.4 channelsTXPOWER= OXC5 f= EEE 802.15.4 channelsMax error∨ ectorTXPOWER OxB5 f= IEEE 802.15. 4 channelsMagnitude(EVM)TXPOWER OxA5. f= IEEE 802.15.4 channelsTXPOWER 0X95. f= IEEE 802. 15.4 channels643333%%%%%%%TXPOWER= 0x85. f= iEEE 802. 15.4 channelsTXPOWER =0x75 f= IEEE 802. 15.4 channels%TXPOWER= 065. f= iEEE 802. 15.4 channelsThe RF output power of the CC2530- CC2591 EM is controlled by the 7-bit value in theCC2530 TXPOWER register. Table 4.6 shows the typical output power and currentconsumption for the recommended power settings The results are given for Tc= 25 C, Vdd3.0V and f= 2440 MHz, and are measured on the cC2530-CC2591 EM reference designwith a 50 Q2 load. For recommendations for the remaining CC2530 registers, see Chapter 8 oruse the settings given by SmartRF StudioOXE520166OxD519149OxC18138OxB517127OxA5161150x95141000x8513940X75860x651079Note that the recommended power settings given in Table 4.6 are a subset of all the possibleTXPOWER register settings. However, using other settings than those recommended mightINSTRUMENTSPage 5 of 19SWRA308Aresult in suboptimal performance in areas like current consumption, EVM, and spuriousemissionTc=25C, Vdd=3.0V, f=2440 MHz if nothing else is stated All parameters are measuredon the CC2530-CC2591EM reference design with a 50 32 load2221-2V201918171611121314151617181920212223242526251510OxE5OxC5OxA50X850x65540-30-20-1001020304050607080ISTRUMENTSPage 6 of 19SWRA308A98Avg 3.6VAva 3vAvg 2V110111213141516171819202122232425261023.6V-1062V-110-40-30-20-100102030405060708070604020-Wanted signal at:-82 dBm10ISTRUMENTSPage 7 of 19SWRA308ACC2530-CC2591EM High Gain ModeC C2530-CC2591EM Low Gain Mode- CC2530EM40000-100110100908070-60-50-40-30-20-100The IEEE standard 802.15. 4 [8] requires the transmitted spectral power to be less than thelimits specified in table 4.7If-fc>3.5 MHz-20 dB-30 dBmThe results below are given for Tc=25 C, Vdd=3.0V and f= 2440 MHz, and are measuredon the CC2530-CC259 1EM reference design with a 50 Q loadIEEE absoluteChannel 182432.52435243752442524452447.5ISTRUMENTSPage 8 of 19SWRA308AOnly a few external components are required for the CC2530-CC2591 reference design. Atypical application circuit is shown below in Figure 5.1. Note that the application circuit figuredoes not show how the board layout should be done. The board layout will greatly influencethe RF performance of the CC2530-CC2591EM. TI provides a compact CC2530CC2591 EM reference design that it is highly recommended to follow. The layout, stack-upand schematic for the CC2591 need to be copied exactly to obtain good performance. Notethat the reference design also includes bill of materials with manufacturers and part numbersL102 L10=TI INF inductorVDD13cc2530LA 1RF PANTCC2591 RF NFNPA EN(P1 1)i工工I NA FNP:1HGM ENPO 7)T:1Proper power supply decoupling must be used for optimum performance. In Figure 5.1, onlythe decoupling components for the CC2591 are shown. This is because, in addition todecoupling, the parallel capacitors C11, C101, and C131 together with, L101, L102, TL11TL101 and TL131 also work as RF loads. These therefore ensure the optimal performancefrom the CC2591. C161 decouples the AvDD blAs power.The placement and size of the decoupling components, the power supply filtering and thePCB transmission lines are very important to achieve the best performance Details about theimportance of copying the CC2530-CC2591EM reference design exactly and potentialconsequences of changes are explained in chapter 6The RF input/output of CC2530 is high impedance and differential. The CC2591 includes abalun and a matching network in addition to the PA, LNa and RF switches which makes theinterface to the CC2530 seamless. Only a few components between the CC2530 andCC2591 necessary for RF matching For situation with extreme mismatch(VSWR 6: 1 till 12: 1out-of-band as shown in Figure 6.2) it is recommended to include all the components asshown in Figure 5.1ISTRUMENTSPage 9 of 19SWRA308ANote that the PCB transmission lines that connect the two devices also are part of the RFmatching. It is therefore important to copy the distance between the devices, the transmissionlines and the stack-up of the PCB according to the reference design to ensure optimumperformanceThe network between the CC2591 and the antenna(L111, C112, C111 C113 and L112matches the CC2591 to a 50 2 load and provides filtering to pass regulatory demands. C111also works as a dc-blockR151 is a bias resistor the bias resistor is used to set an accurate bias current for internaluse in the cc2591The TI reference design contains two antenna options. As default, the Sma connector isconnected to the output of CC2591 through a 0 Q2 resistor. This resistor can be soldered offand rotated 90 clockwise in order to connect to the PCB antenna, which is a planar invertedF antenna(PIFA). Note that all testing and characterization has been done using the SMAconnector. The PCB antenna has only been functionally tested by establishing a link betweentwo EMs. Please refer to the antenna selection guide [6] and the Inverted F antenna designnote [7 for further details on the antenna solutionsISTRUMENTSPage 10 of 19SWRA308A

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