Assembly language assignment, Assembly Language

Assignment Help:

The main objective of the assignment is to explore the knowledge regarding parallel ports of a computer system. You can read and write datato/from the parallel port using IN and OUT instructions respectively.

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Suppose we have designed a device that enables us to control the room temperature using a system's parallel port.

For this circuitry, we have to use:

1. LM35 (Temperature Sensor)

2. ADC8080 (8-bit Analog to Digital convertor)

3. Parallel Port's data and control blocks.

We have interfaced LM35 (Temperature Sensor) with ADC8080 (Analog to Digital Converter) and Parallel Port of a computer system.

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The LM35 (temperature sensor) reads the room temperature and transmits analog data to ADC 8080 (analog to digital converter), which then converts analog reading (from sensor) to digital data (8-bit binary data). The converted digital data (b-bit binary number) will be read by processor through its parallel port and will control (either increase or decrease)the temperature of an air conditioner depending upon the working condition/criterion.

Objectives:

Students are required to code the device that controls the temperature of a room by signaling an Air Conditioner (AC).

In order to code, you have to consider the following objectives.

1. You have to read room temperature data from parallel port's data block (8-bit binary data).

2. Check either room temperature is between 21 or 23 degree Celsius (15H and 17H).

3. If Yes, No action taken (program exit).

4. If No, Check either temperature is below 21 degrees or above 23 degrees

a. If less than 21 degrees, increase the temperature by sending a pulse to Air Conditioner Control PIN C0.

b. If greater than 23 degrees, decrease the temperature by sending a pulse to Air Conditioner Control PIN C1.


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