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1、中文2075字外文资料原文Design and Implement of Responder Based on Freescale HCS12 Single Chip Microcomputer Responder is also known as the first signal discriminator, which is widely used in various competitions. It can judge the number of the first player accurately, fairly and intuitively. Currently, a vari
2、ety of quiz responder has emerged on the market, in which a small responder is commonly designed with small-scale digital integrated circuit. Although the technology has been quite mature,but it is simple function, low intelligence, high fault, simple display, less flexibility, not convenience for u
3、pgrade, it has been unable to meet all kinds of requirements for intellectual competitions and variety shows. Therefore, it is necessary to develop some kinds of responder which are more suitable for applications.In recent years, with the rapid development of science and technology, the applications
4、 of single-chip microcomputer are becoming widely, which promotes the development of traditional measurement and control technology. In this paper, Freescale HCS12 1-3 is designed as a core component to achieve an intelligent digital responder with 8-channel 4-8, it has some breakthroughs on technol
5、ogy, function and other aspects, comparing with the past responder. It is characterized by simple structure, powerful, good reliability, practicability, so that the competition can really carried out on just, fair and open rules. The basic functions of responder designed in this paper are: (1) The s
6、ystem can limit the competition time and answer time of the alarm; (2) The system can identify the answer signal and identify the players number; (3) The system can calculate score for each player and display the scores.Responder can accommodate 8 players numbered 1 to 8. In addition, LED digital tu
7、bes are designed to display the latched data. After race host clears the system, if participants press switch, and after answer is certificated whether it is correct or not, the number of first player to answer in action is immediately shown by digital tubes. Responder should have a strong ability t
8、o distinguish players to answer in the action, its resolution reaches at least a few ms After the requirements and functions of responder are analyzed, the following circuits are required in general:1、Responder circuitThe circuit has two functions: one is to identify the number of the player who pre
9、ss button, and to save the number; the other is to prohibit the other players from buttoning or to make other buttons not available2、Timing circuits Host can set competition time and answer time by the time pre-set-circuit. If nobody can answer question within the set time, all players will not get
10、score, then the host will announce the answer. Besides, if someone gets the chance to answer the question, but does not give the right result before the allowable time, he or she wont get the score, the overtime signal will be also send, the host will declare the right answer. Freescale HCS12 contai
11、ns timer module, the timer module can be directly used.3、Overtime circuit HCS12 will send overtime signal when time goes beyond the set time, this signal will be transferred to the PC computer by the serial port. The next question will be proceeded to answer.4、Scores count and display circuit. When
12、host presses the answer key, it is time to start to answer, if one player presses the answer key, his or her number will be recorded, his or her score will be counted and displayed on the LED digital tubes. Bedside the circuits designed above, some necessary logicdesigns are also necessary. The logi
13、c designs are as following:First, the host will read the question which will show in the LCD; next, the PC computer will send letter k, which means that play is beginning to competition. At the same time, timing circuit starts to work, if nobody gets the chance to answer the question within permitte
14、d time, microcontroller will send the word chao shi to PC computer; If someone presses the competition key within the specified time, microcontroller will send his or her number. If the time goes beyond the permitted time, PC computer will send next which means turning to the next question, the next
15、 question will be automatically showed to answer. If some player gets the chance to answer the question, his or her number and scores will decrease 1 automatically and show in the digital tubes, then microcontroller sends next to go on the next question. If the score is few than 0 after decreasing,
16、player is eliminated. The right answer will show on the LCD. Finally, if all the questions are done, microcontroller will send e to end the game, then the scores of all players will be computed, the highest one will be shown on the digital tubes.Responder hardware is firstly designed;Responder hardware is taken directly from the hardware resources of Freescale HCS12 development board developed by Suz
