8086 Assembler Tutorial for Beginners (Part
12)
Controlling External Devices |
הדרכה בתכנות אסמבלר 8086 למתחילים (חלק
12)
בקרת התקנים חיצוניים |
There are 3 devices attached to the emulator: Traffic Lights, Stepper-Motor and
Robot. You can view devices using "Virtual Devices" menu of the emulator. For technical information see I/O ports section of Emu8086 reference. In general, it is possible to use any x86 family CPU to control all kind of devices, the difference maybe in base I/O port number, this can be altered using some tricky electronic equipment. Usually the ".bin" file is written into the Read Only Memory (ROM) chip, the system reads program from that chip, loads it in RAM module and runs the program. This principle is used for many modern devices such as micro-wave ovens and etc... Traffic Lights |
לאמולטור 3 התקני קלט/פלט מדומים: צומת
רמזורים, מנוע צעד ורובוט. ניתנים להפעלה דרך התפריט "התקנים מדומים"
של האמולטור. מערכת רמזורים |
Usually to control the traffic lights an array (table) of values is used. In certain periods of time the value is read from the array and sent to a port. For example: | בדרך כלל משתמשים במערך נתונים (טבלה) למטרת הפעלת צומת רמזורים. בפרקי זמן קבועים התוכנית קוראת נתונים מתוך המערך ושולח אותם לשער בו מחובר הרמזור. למשל: |
; directive to create BIN file:
|
Stepper-Motor |
מנוע צעד |
The motor can be half stepped by turning on pair of
magnets, followed by a single and so on. The motor can be full stepped by turning on pair of magnets, followed by another pair of magnets and in the end followed by a single magnet and so on. The best way to make full step is to make two half steps. Half step is equal to 11.25 degrees. Full step is equal to 22.5 degrees. The motor can be turned both clock-wise and counter-clock-wise. See stepper_motor.asm in Samples folder. See also I/O ports section of Emu8086 reference. Robot |
ניתן להזיז את המנוע בחצי צעד על ידי חיבור
בחשמל של זוג מגנטים, בהמשך צעד יחיד וכן הלאה. רובוט |
Complete list of robot instruction set is given in
I/O ports section of Emu8086
reference. To control the robot a complex algorithm should be used to achieve maximum efficiency. The simplest, yet very inefficient, is random moving algorithm, see robot.asm in Samples folder. It is also possible to use a data table (just like for Traffic Lights), this can be good if robot always works in the same surroundings. |
רשימה כוללת של פקודות הרובוט נכללת בחלק
שערי קלט/פלט שבאזכור הכללי של תוכנת
האמולטור. |
Copyright 2002-2003 - Emu8086, Inc. All rights reserved. - Portions Copyright 1997-2003 Barry Allyn. All rights reserved.
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