【正文】 畢業(yè)設(shè)計(jì) (論文 ) 英 文 翻 譯 題 目 基于單片機(jī)的數(shù)字 PWM控制器設(shè)計(jì)與應(yīng)用 — 硬件 學(xué) 院 專業(yè)及班級(jí) 姓 名 學(xué) 號(hào) 指 導(dǎo) 教 師 日 期 2020 年 6 月 9 日 Modeling, Simulation Due to a PWM Buck Type Switching Power and MCU Abstract: Introduce a kind of dormancy of using restore to the throne in the operation way and improve the antiinterference ability method of the onechip puter。 Analyses its scope of application, provide and use the circuit concretely。 Combine the instance, analyze the characteristic of the hardware and software design under these kind of operation way. Keyword: Onechip puter Restore to the throne /dormancy antiinterference Foreword Introduction: With the development at full speed of the micro electric technique, the performance of the onechip puter improves rapidly, demonstrate the outstandi ng advantage in the operation, logic control, intelligent respect, replaced and enlarged the measuring that the circuit made up, control circuit by digital logical circuit, operation originally to a great extent, use very extensively. But because it have system halted, procedure run critical defect of flying etc, make it limit in a lot of important application of occasion. A lot of technology in antiinterference , for example set up the software trap, add the hardware to guard the gate in dog39。s circuit etc, can make this problem have better settlement, but still the existing problem: ① Guard the gate dog at the movement, mean and appear mistake already and run some time, this is not allowed in some occasions。 ② Procedure appear circulation mistake very much sometimes, but just guard the gate dog control link include and enter, adopt and guard the gate as to such a mistake dog unable to discern。 ③ In measure and control cycle among the long system, onechip puter spend wait for the peripheral hardware a large amount of time, will be interfered too when carry out and wait for the order. To these situations, we have tried the method restored to the throne voluntarily in practice, alternate pulse of adopting etc or restore to the throne waking according to external terms to the onechip puter up. After being restored to the throne each time, the onechip puter carries out the corresponding procedure, enters dormancy in time after finishing carrying out the task, wait to be restored to the throne neatly. Have solved abovementioned problems well with this method , and has got better result in the agricultural voltage transformer prehensive protector experiment. Now take 51 serial onechip puters as an example and probe into the concrete principle and implementation method, restored to the throne the signal as the high level. principle and implementation method Restored to the throne the law regularly unconditionally Use timer, specialpurpose clock chip or other pulse generator, produce signal of restoring to the throne regularly according to interval that set for. This kind of method is especially suitable for the measuring instrument. In not running actually, sample the analog quantity of introduction with A/D converter often, then store showing. This course is very fast, but steady for reading, the data per second are only upgraded 1 2 times, a large amount of time of CPU is used for waiting. Let CPU carry out and enter dormancy directly after the task , restore to the throne and wake by exter nal world up It carry out the next operation, this is to restore to the throne the law regularly In this way can make antiinterference ability strengthen greatly , have 2 points mainly: ① . At the dormancy, procedure stop run, can appear PC indicator disorderly procedure that causes run and fly. Work time in dormancy proportion 1:9, that is to say 1 s have time of s used for measuring, sending off showing, there is time dormancy of , the probability that the procedure is interfered is 1/10 while running at full speed, whole antiinterference ability raise by 10 times. ② Because every 1s is restored to the throne once unconditionally, once present the system halted during a job, can certainly resume when restored to the throne next time. As to only instrument that show, some reading mistake that 1s appear accidentally there is no memory to the next measurement, be could bear , belong to “pass” mistake. This kind is restored to the throne the advantage of dog39。s circuit for guarding the gate regularly, first, change waiting time into a dormancy state, time to shorten and may be interfered。 Second, avoided happening that the dog controls the death circulation of the link to include guarding the gate. The external condition is restored to the throne the law Some arrival that export or measure is controlled by the outside. For instance, the hot form. of heating, rotate the pulse produced and calculate heat by hot water wheels, there is no hot water to flow, there is no heat to export, CPU only need in fact keep number value, do not need to count. Can imagine hot water wheels rotate when parking warm , CPU idle in will it be will it be one season autumn spring and summer, If let dormancy its , measure have water wheels pulse constantly, antiinterference ability can strengthen greatly. So, so long as link up th