Building 8051 Application under DOS
Welcome to our tech support article on building 8051 applications under DOS. In this guide, we will walk you through the steps to build your own 8051 application using DOS as the operating system. The 8051 microcontroller is a popular choice for embedded systems due to its simplicity and versatility.
What is DOS?
DOS, short for Disk Operating System, is an early operating system that was widely used in the 1980s and 1990s. It provides a command-line interface and supports running programs directly on the hardware without the need for a graphical user interface. DOS is a lightweight and efficient operating system, making it suitable for embedded systems and low-resource environments.
Setting up the Development Environment
Before we start building our 8051 application, we need to set up the development environment. Here are the steps:
- Choose a DOS-compatible computer or a virtual machine.
- Install DOS on the computer or virtual machine.
- Download and install a suitable 8051 development toolset, such as the Keil C51 or SDCC (Small Device C Compiler).
- Configure the development toolset to work with DOS.
Writing the Application Code
Once the development environment is set up, we can start writing our 8051 application code. Here are the steps:
- Create a new source code file with a .c extension, e.g., myapp.c.
- Open the source code file in a text editor or an integrated development environment (IDE).
- Write your application code using the C programming language.
- Save the source code file.
Here's an example of a simple 8051 application code that blinks an LED connected to port P1:
#include <8051.h>
void delay() {
unsigned int i, j;
for (i = 0; i < 50000; i++) {
for (j = 0; j < 100; j++) {
// Delay loop
}
}
}
void main() {
while (1) {
P1 = 0xFF; // Turn on the LED
delay();
P1 = 0x00; // Turn off the LED
delay();
}
}
Compiling and Building the Application
Once the application code is written, we need to compile and build it into an executable file that can be run on the 8051 microcontroller. Here are the steps:
- Open the command prompt in DOS.
- Navigate to the directory where your source code file is located.
- Run the appropriate command to compile the code using the chosen development toolset. For example, if you are using the Keil C51 toolset, you can use the command:
C51 myapp.c - If the compilation is successful, a .hex or .bin file will be generated.
Running the Application on the 8051 Microcontroller
Now that we have the compiled executable file, we can run it on the 8051 microcontroller. Here are the steps:
- Connect the 8051 microcontroller to the computer or the development board.
- Use a suitable programming tool to flash the .hex or .bin file onto the microcontroller's memory.
- Power on the 8051 microcontroller.
- The application will start running on the microcontroller, and you should see the LED blinking as per the code.
Conclusion
Congratulations! You have successfully built and run your own 8051 application under DOS. This guide provided an overview of the steps involved in setting up the development environment, writing the application code, compiling and building the application, and running it on the 8051 microcontroller. The 8051 microcontroller is a powerful and versatile platform for building embedded systems, and DOS provides a lightweight and efficient operating system to support development.
References
| Source | Link |
|---|---|
| Keil C51 | https://www.keil.com/c51/ |
| SDCC (Small Device C Compiler) | http://sdcc.sourceforge.net/ |