In daily life, the emergence of intelligent temperature control systems makes our environment more comfortable and adapts to various complex climate changes. Here, we will use emu8086 and Proteus, combined with assembly language and hardware simulation technology, to build a system that can automatically control the temperature of any room.
1. Project Introduction
The core goal of this project is to develop an intelligent temperature control system based on assembly language using emu8086 microprocessor simulator and Proteus circuit design software. In this system, we will set a temperature threshold range: 23 degrees to 32 degrees. In this temperature range, our fan motor will stop to achieve the effect of energy saving and comfort.
First of all, we need to have a basic understanding of the software and hardware used in order to understand the operation process of the entire project.
2. Tool introduction
2.1 emu8086
emu8086 is a microprocessor emulator, which mainly emulates the Intel 8086 microprocessor. We write assembly language code on this simulator, which can realize direct control of the hardware.
2.2 Proteus
Proteus is an electronic design automation (EDA) tool that provides circuit design, board layout, and microcontroller simulation capabilities. In this project, we will use Proteus to simulate our hardware circuit.
3. Preliminary temperature control algorithm
Before starting the design and programming, we need to initially determine a simple temperature control algorithm. The simplified version of the algorithm can be set as follows: when the temperature is higher than 32 degrees, we start the fan; when the temperature is lower than 23 degrees, we turn off the fan; and within this range, we keep the status of the fan unchanged.
Here is the pseudocode for this algorithm:
if temperature > 32
start fan
else if temperature < 23
stop fan
else
keep fan status
However, this is only the most basic version. The real environment is complex and changeable, and we may need to make more adjustments and optimizations to the algorithm.
4. Understand assembly language
In our project, the core control logic will be realized by assembly language. Assembly language is a low-level programming language that is closely related to the structure of the hardware and can provide us with fine-grained control over the hardware. However, due to its complexity, the learning curve is relatively steep. Here we will only introduce some basic syntax and operations for everyone to understand and use.
In assembly language, we mainly realize data processing and transfer of control flow by operating the registers of the processor. We usually use MOVinstructions to move data from one place to another, ADDand SUBinstructions to perform basic arithmetic operations, and instructions such as JMP, JZ, , JNZetc. to perform conditional jumps.
For ease of understanding, we can look at a simple sample code:
; 设置一个初始温度
MOV AX, 25
; 如果温度高于32，启动风扇
CMP AX, 32
JA start_fan
; 如果温度低于23，关闭风扇
CMP AX, 23
JB stop_fan
; 保持风扇状态
JMP keep_fan_status
start_fan:
; 启动风扇的代码
...
stop_fan:
; 关闭风扇的代码
...
keep_fan_status:
; 保持风扇状态的代码
...
5. Proteus circuit design
In addition to software logic, our temperature control system also needs actual hardware devices. In this project, we use Proteus to simulate the hardware circuit.
In Proteus, we can design a circuit including the main components like temperature sensor, microcontroller, fan motor, etc. By writing assembly code, we can control the microcontroller to read the temperature from the temperature sensor, and then control the fan to turn on and off according to the temperature.
Here is a simplified schematic:
温度传感器
↓
微控制器 ── 风扇
The temperature sensor provides current temperature information to the microcontroller, and the microcontroller decides whether to start or stop the fan based on this information.
6. Combining emu8086 with Proteus
We know that emu8086 can simulate a microprocessor to run assembly code, and Proteus can simulate the work of the entire circuit. So how do you combine the two?
First, we need to build a circuit in Proteus that includes a microprocessor. This electrical processor is the same model (like 8086) used in the emu8086 emulator. Then, we need to configure this microprocessor in Proteus to load assembly code from emu8086. In this way, our assembly code can run on the circuit in Proteus.
7. Assembly language code implementation
Next, we will implement a more complete assembly code to control our temperature control system. Due to space limitations, I will only show the main control logic part.
; 初始化DS寄存器
MOV AX, 0
MOV DS, AX
; 从温度传感器读取温度
MOV DX, TEMP_SENSOR_PORT
IN AL, DX
MOV [TEMP], AL
; 检查温度
MOV AX, [TEMP]
CMP AX, 32
JA start_fan
CMP AX, 23
JB stop_fan
JMP keep_fan_status
start_fan:
; 启动风扇的代码
...
stop_fan:
; 关闭风扇的代码
...
keep_fan_status:
; 保持风扇状态的代码
...
In this code, we first initialized the DS register and then read the temperature from the temperature sensor. Then, we decide whether to start the fan, turn off the fan, or keep the current state of the fan based on the read temperature.
8. Conclusion
Through this project, we have mastered how to use emu8086 and Proteus, combined with assembly language and hardware simulation technology, to build an intelligent temperature control system. Although this project is just a simple simulation, it can provide us with a platform to actually operate the hardware, and let us have a deeper understanding of the principles of assembly language and hardware design. In actual work or study, we can expand and optimize this project according to actual needs to meet more needs.