【導(dǎo)讀】；格式符合指導(dǎo)書要求。家用電子工業(yè)已經(jīng)應(yīng)用紅外遙控器控制電視機，錄像機和有線電視很多年了。樣的技術(shù)最近開始應(yīng)用于工業(yè)應(yīng)用以替代小鍵盤。可以通過PIC16C5X譯解大多數(shù)的紅外信號。第一種類型響應(yīng)的已調(diào)制的紅外信。第二種響應(yīng)未調(diào)制的紅外脈沖并且有受限范圍。每種PIC16C5X應(yīng)用程序表示在映射出一個預(yù)先存在的紅外格式的。典型的紅外信號遙控器有三層。序中注意他們被稱為“紅外、調(diào)制和串行數(shù)據(jù)。紅外層是種發(fā)射方式。這個頻率層爆出的紅外信號通常是在頻率調(diào)制之間。這樣做是為了延長電池壽命和遠(yuǎn)程控制減少。一個長缺口或突變被詮釋為一個“1”,一個短間隙或突變被解釋為?？梢詮馁|(zhì)量技術(shù)QSE157QT零件號碼。PIC16C57的選擇并不表示這些處理操作需要解碼。放入不到一半的可用PIC16C54ROM空間中,并使用四個內(nèi)存位置。PIC16C57含有一個按鈕用于重置,和四個跳投是提供用于控制應(yīng)用程序啟動。從9v,200米墻安裝供應(yīng)。跳轉(zhuǎn)在這兩個1和2將直接程序流向至3. SW2和SW3控制脈沖或顯示間。作用是預(yù)選分頻器。

　　

【正文】 lating lengths to bits Once the characteristic lengths of ones and zeros have been found and the length of the typical mand has been found, a program can then be written to decode these lengths to ones and zeros and display them on the two digit display. Also a HOLD flag can be created which will be true as long as the button is being held down. Usually 1/8 second between mands indicates a new mand. Use this value to time out HOLD times and times between mands. is an example of a program that translates the gap lengths of the NEC6121 format to the four bytes that make up the information in each mand. 6 Step 7:Create a button to code cross reference table implements a lookup table to translate the codes received to the actual button pressed. A counter is loaded with the highest number button that can be pressed, and the code is then looked up and pared with the code that was received. If no match, the counter is decremented until a match is found. When found, the counter then has the button number that was pressed. Note too, that more checking may be done at this level on some formats, such as having an address, a plement of the code following the code itself for checking. The result from all of the steps in decoding is that if a button is pressed on a remote control, that button number appears in a PIC16C57 file location. A mand such as channel up or channel down will appear as two set flags, one to indicate the mand, the other to indicate that it is active, HOLD. From this point the application can access these flags and files to respond appropriately. Note the following details of the code protection feature on PICmicro 174。 MCUs. ? The PICmicro family meets the specifications contained in the Microchip Data Sheet. ? Microchip believes that its family of PICmicro microcontrollers is one of the most secure products of its kind on the market today, when used in the intended manner and under normal conditions. ? There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the PICmicro microcontroller in a manner outside the operating specifications contained in the data sheet. The person doing so may be engaged in theft of intellectual property. ? Microchip is willing to work with the customer who is concerned about the integrity of their code. ? Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable”. ? Code protection is constantly evolving. We at Microchip are mitted to continuously improving the code protection features of our product. If you have any further questions about this matter, please contact the local sales office nearest to you. Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. It is 7 your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip’s products as critical ponents in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights. Trademarks The Microchip name and logo, the Microchip logo, FilterLab, KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER, PICSTART, PRO MATE, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the . and other countries. dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, InCircuit Serial Programming, ICSP, ICEPIC, microPort, Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM, MXDEV, PICC, PICDEM, , rfPIC, Select Mode and Total Endurance are trademarks of Microchip Technology Incorporated in the . Serialized Quick Turn Programming (SQTP) is a service mark of Microchip Technology Incorporated in the . All other trademarks mentioned herein are property of their respective panies. 來自 Microchip Technology Inc. DS00657Apage 38