單片機外文翻譯----at89c51單片機控制的恒溫水域溫控系統(tǒng)-單片機-wenkub
2023-01-30 07:56:05 本頁面
【正文】 e 8255 high output corresponding IO port, the drive transistor turnon 9013, so that the relay action, in order to drive the work of the relevant circuit. Significant choice for a show so that the display to choose between the settings and measurement. Keyboard control and status indication circuit With the 8255 connected to the IO port 8 and 9 LED button to plete the mon waters of the control thermostat and the instructions state. In addition to each 3 button with the 8255 connected to the IO port, but also with AT89C51 it connected the timer so that when the button is depressed immediately after the interruption of AT89C51 applications, and query the status of 8255 in order to carry out the functions of the corresponding control. shows the circuit Display circuit using a half the number of table 4 show the temperature head waters of the measurement of temperature and set temperature. 2 Software design Skeleton of the software, contains initialization, configuration subroutine, subroutines to deal with temperature, showing subroutine. Completion of system initialization after poweron reset 8255 and software initialization and preheated water for the water to wait for work, and open the inlet solenoid valve, when the corresponding button press interrupted when AT89C51, read 8255 the status of the population to determine the function keys in order to call the corresponding subroutine. Subroutine pleted one set of the set temperature function. Initialization settings for the , when the choice set and to identify key addition and subtraction operations for each click on the Settings button software settings for the corresponding temperature of the addition and subtraction operation count, and the value storage and display. Subroutine to deal with the role of temperature is the temperature set values and the difference to the SCR trigger circuit heating thermostat control. The use of Pro / E to establish mold standard parts library Family Pro/E is part of the family table (or assembly, or the characteristics of) a collection of these parts (or assembly or characteristics) are broadly similar, but in 12 some small differences, for example, fastening screws Hexagon many kinds of specifications, but they seem to be like and to implement the same function, so in the Pro / E in them as a part family is a very useful table in the family the same as a tabledriven ponents parts to be identified. In Pro / E use group table has the following advantages: 1) simple and pact to create and store a large number of objects. 2) For the generation of standard parts to save a great deal of time and work. 3) parts from a series of documents to generate change, do not have to recreate and generate for
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