基于freescalehcs12系列單片機(jī)設(shè)計和實(shí)現(xiàn)搶答器外文翻譯-文庫吧
2025-01-01 12:56 本頁面
【正文】 yer to answer in action is immediately shown by digital tubes. Responder should have a strong ability to 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:Responder circuitThe circuit has two functions: one is to identify the number of the player who press button, and to save the number。 the other is to prohibit the other players from buttoning or to make other buttons not availableTiming circuits Host can set petition time and answer time by the time presetcircuit. If nobody can answer question within the set time, all players will not get 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 won39。t get the score, the overtime signal will be also send, the host will declare the right answer. Freescale HCS12 contains timer module, the timer module can be directly used.Overtime circuit HCS12 will send overtime signal when time goes beyond the set time, this signal will be transferred to the PC puter by the serial port. The next question will be proceeded to answer.Scores count and display circuit. When 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 logic designs are as following:First, the host will read the question which will show in the LCD。 next, the PC puter will send letter k, which means that play is beginning to petition. At the same time, timing circuit starts to work, if nobody gets the chance to answer the question within permitted time, microcontroller will send the word chao shi to PC puter。 If someone
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