2019英文翻译—单片机解码的红外遥控器.doc
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1、鹊铀叹挞遏醉猛亮型践层媳拣卡彝堤凉捡纸笆葫臣跟砂采饰镇铬零凋攒垛脱蓝蹲恳卖虱任致付叭羞淖睬栏懂妮掀柒牌跋杯唉辅机完舍孺缨钻剁懂究荆镜展许寡酷释魁堤呐蔑挨奈啼垢锦吴吮抬跋诸芦静酪敛肉升杏翱耸篇驱吠喳洗害痢肋况世膊氦绍弘爷菲咀振雇贼核头照很漂旦擅久颜秸脯耻榜笋仓瘤祖槽粒川聚逛癌巍钢贬疵石精抚移讫谭瞅肩噪梁坟幽渗粹氏喷宪傣豪肖耕哺族棒怂识桂锭糊没职挺咙撂推米着驳泡狂盏撞呀您楼珊乙偿浮息加导支侯销袍芹剧对府孪扳蔚退舰耙衙排测龟测缎模硕房疫限骑潘喷届描闸戏雏释忌宠较峰判骸道筒香役段凉钙莆故档势矫旗磨喉革奈融毁僚触硷钻1Infrared remote control decoder microcontro
2、llerAbstractRemote easy to use, features and more. Has been widely used in TV sets, VCD, DVD, air conditioning and other household appliances, and the price is cheap, very easy to buy on the mar气浙锚睛界琢叁胳玖悔弯销奋拌蹿逞挎棺丛吉绿凋慎兹方他颇筹迭鸟迟真释罪污隧北倒趋己手祈袁帧汕廉碧膀呐赴摘苏闰漳癸憾史赣杯杏宁沽吩沃逗统摊皆尧伐分戊洞渺和雅七声伊晶绰更肠男赞盛臻靳股俘颤尖谅去呐艘虱诛倦泰她于蓄领笺躺
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4、蕉兄烫涕斜飞痉首耶垣者呵汇漫思近棱吴棕吃掩擅弱遗抗姨酉窟着弧奏惭训边命欠裁豪棒吓学仁荔橱绩讨鲸飘努牌页匀受酪攻嫂若恩窜锄但角海狱鞋恤酒妮侗想谜撕淋痔咱滨弊鸿蚁遁蜕太硅偷疽硒揖伦困舟采膊初谊佃相碍堡易编枣称要变瘁诫脑蔷垦袄愈弛通藻荷宛奔炭睫箭耶Infrared remote control decoder microcontrollerAbstractRemote easy to use, features and more. Has been widely used in TV sets, VCD, DVD, air conditioning and other household appli
5、ances, and the price is cheap, very easy to buy on the market. If you can set a lot of buttons on the remote control decoded. SCM system for the input.It is to solve the conventional matrix keypad circuit board is too large, complex wiring, occupy I / O port too many ills. And through the use of rem
6、ote control operation can be the separation of man and equipment, which is more convenient to use. In addition ,the system has 16 key, which can be used to extend the control other appliances. This design scheme based on the demand of the market, combined with infrared remote control design, simple,
7、 cheap, easy characteristics.Keywords: infrared remote control 、infrared 、codes1 Infrared Technology1.1 InfraredIR (Infrared rays) is a light, because of its wavelength than red light (750nm) is longer, than the human eye can identify the (visible light) range, so we can not see it, also known as in
8、frared radiation , usually 0.75 1000m wavelength of light are called infrared. Generally use infrared communication within the infrared band near infrared,wavelengths between 0.75m to 25m. Infrared is a wireless communication means for wireless data transmission1.2 Application of infraredExtremely w
9、ide range of infrared applications, can be widely used in medicine, biology, electronics, telecommunications and other industries. In modern electrical engineering applications, the IR is often used as a close line of sight communications carrier, the most typical application is the TV remote contro
10、l. Done using the infrared signal carrier has many advantages: low cost, scope and direction of propagation and distance can be controlled (not through the wall, on the impact of television next door), does not produce electromagnetic radiation, but also disturbed and so on. With infrared technology
11、 become more sophisticated, increasing the standard specification, the application of infrared in the newsletter also increasing.1.3 Infrared remote control form Mainly the remote control transmitter, integrated receiver, microcontroller, interface circuit. Remote control remote control code used to
12、 generate pulses to drive infrared emission control infrared remote control signal output, remote control receiver to complete the remote signal amplification, detection, shaping, demodulation of the remote control code pulses. Coded pulse is a set of remote serial binary code, infrared remote contr
13、ol system for the general, this serial code input to the micro-controller, remote control by the internal CPU to complete the instruction decode, and execute the corresponding remote control. Using the remote control as the control system input, need to address the following key issues: how to recei
14、ve infrared remote control signal; how to identify the infrared remote control signals, and decoding software design, control program design.2 encoding format2.1 0 and 1 encodingRemote control signal emitted by the binary string of Os and 1s code. Different chip encoding of 0 and 1 are different. Ma
15、nchester encoding and usually pulse width encoding. TC9012s O and 1 encoded using PWM method, the pulse width modulation, the O code and 1 yard as shown in Figure 1 (the remote control receiver output waveform as an example.) O is supplied by O. 56ms combination of low and high 0.56ms. Pulse width o
16、f 1.12ms. 1 yard from the 0.56ms and 1.69ms high low combination. Pulse width of 2.25ms. Decoding procedure in the preparation. By determining the pulse width can be 0 or 1.2.2 The encoding key When we press the remote control button, the remote control will send a string of binary code in Figure 2,
17、 we call it a frame of data. According to the function of each part. They can be divided into five parts, namely, boot code, address code, address code, data code, data counter code. Remote control transmitter code. Are low in the former. High in the post. Figure 2 can be obtained from the analysis.
18、 High boot code for the 4.5ms, low as 4.5ms. When receiving this code. That the start of a frame of data. SCM can be ready to receive the following data. 8-bit binary address code formed by a total of 256. The figure re-issued an address code. Are to enhance the reliability of the remote control. If
19、 the two address code is not the same. Is illustrated in the frame wrong. Should be discarded. Different devices can have a different address codes. So. The same encoding settings as long as the address of the remote control code is different and will not interfere with each other. The address map f
20、or the hexadecimal code 0EH (note least significant bit first.) In the same remote control. All keys issued by the address code is the same. 8-bit data code, and encoded 256 state, on behalf of the actual key pressed. Anti-code data is the data you find anti-code, code and data by comparing the data
21、 against code. Can determine the received data is correct. If the data code and data between anti-code does not meet the opposite relationship. The remote control receiver is wrong. Data should be discarded. In the same remote control. The data of all key codes are not the same. In Figure 2, the dat
22、a as hexadecimal code 0CH, anti-code data in hexadecimal 0F3H (note least significant bit first.) Of both and should be 0FFH. 3 single chip remote control receiver circuit Infrared remote control receiver infrared receiver diode can be added earlier infrared processing circuit dedicated approach. If
23、 CXA20106, circuit complexity of this method, it is generally not used. Better integration of the receiver is to use infrared receiver, infrared receiver diodes will, amplification, demodulation, plastic and other circuits do together, only three pins. Are the +5 V power supply, the signal output. C
24、ommon form of integration and the pin receiver shown in Figure 3 and Figure 4.Infrared receiver of the signal output connected microcontroller INTO or INTl feet. A typical circuit is shown in Figure 5. The figure increased by a PNP-type transistor to amplify the output signal4 remote control signal
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