1、 毕业设计 (论文 ) 英 文 翻 译 题 目 基于单片机的数字 PWM控制器设计与应用 硬件 学 院 专业及班级 姓 名 学 号 指 导 教 师 日 期 2012 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 anti-interference ability metho
2、d of the one-chip computer； 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: One-chip computer Restore to the throne /dormancy anti-interference
3、Foreword Introduction: With the development at full speed of the micro electric technique, the performance of the one-chip computer improves rapidly, demonstrate the outstanding advantage in the operation, logic control, intelligent respect, replaced and enlarged the measuring that the circuit made
4、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 anti-interference , for ex
5、ample set up the software trap, add the hardware to guard the gate in dogs circuit etc, can make this problem have better settlement, but still the existing problem: Guard the gate dog at the movement, mean and appear mistake already and run some time, this is not allowed in some occasions； Procedur
6、e 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； In measure and control cycle among the long system, one-chip computer spend wait for the peripheral hardware a large amou
7、nt 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 one-chip computer up. After being
8、 restored to the throne each time, the one-chip computer 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 above-mentioned problems well with this method , and has got better result in the agr
9、icultural voltage transformer comprehensive protector experiment. Now take 51 serial one-chip computers as an example and probe into the concrete principle and implementation method, restored to the throne the signal as the high level. 1.A principle and implementation method 1.1 Restored to the thro
10、ne the law regularly unconditionally Use timer, special-purpose 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 an
11、alog 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
12、 the throne and wake by external world up It carry out the next operation, this is to restore to the throne the law regularly In this way can make anti-interference ability strengthen greatly , have 2 points mainly: . 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 0.1 time of s used for measuring, sending off showing, there is time dormancy of 0.9s, the probability that the procedure is interfered is 1/10 while running at full speed, whole anti-
