1、 海军大连舰艇学院本科生外文翻译 第 1 页 Dormancy of the one-chip computer-restore to the throne in the operation way and improve anti- interference ability Abstract: Introduce a kind of dormancy of using- restore to the throne in theoperation way and improve the anti-interference ability method of the one-chip compu
2、ter；Analyse its scope of application, provide and use the circuit concretly； Combine the instance, analyse 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 Foreword Introduction: Wit
3、h the development at full speed of the microelectric 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 up, control circuit by digi
4、tal logical circuit, operation originally to a great extent, use very extensivly. 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 example set up the software tr
5、ap, add thehardware to guard the gate in dogs circuit etc, can make this problem havebetter 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； Procedure appear circulation mistake v
6、ery 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 amount of time, will be interfered
7、 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 restored to the throne each t
8、ime, 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 nextly. Have solved above-mentioned problems well with this method , and has got better result in the agricultural voltage transformer
9、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 throne the law regularly unconditi
10、onally 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 analog quantity of introduction
11、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 extern
12、al 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
13、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-interference ability raise by 10 times. Because every 1s is
14、 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
15、to “pass” mistake. This kind is restored to the throne the advantage of dogs circuit for guarding the gate regularly, first, change waiting time into a dormancy state, time to shorten and may be interfered； Second, avoided happenning that the dog controls the death circulation of the link to include
16、 guarding the gate. 1.2 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 water wheels, there is no hot water to flow, there is n
17、o heat to export, CPU only need in fact keep number value, do not need to count. Can imagine hot water 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, anti-interference ab
18、ility can strengthen greatly. So, so long as link up the restoring to the throne of the pulse of the water wheels and CPU, the water wheels rotate a circle each time, CPU is restored to the throne once, hot form. can work normally , this is restored to the throne the law by the external condition .
19、Similar application have half electron kilowatt-hour meter , go on one count just when the machinery degree wheels and transfers to a circle, users do not need the electricity, CPU has been knowing the dormancy all the time . The restoring to the throne in the interval not to be regular, but confirm
20、ed according to the external condition of this method. In some occasions, the time of the dormancy will be very long, very effective to improving anti-interference ability. 2 .The hardware realizes the main point 2.1 Restored to the throne regularly unconditionally Generally have 2 kinds of methods.
21、 Use theitimer or the special-purpose clock chip to be restored to the throne. Fig1, in order to use the timing circuit that 555 circuit makes up； Can use the clock chips of X1126 ,etc too , wake CPU up with the alarm signal after setting up warning time. This kind of method is suitable when the long interval is made, can also follow the result of this operation ， determine to wake time up in alarm next time temporarily, very flexible and convenient. The signal of using the system to be inherent is as reducing the pulse regularly. Use 50Hz worker power make reducing after
