Create a new Keil C51 project (3)

1. Download, install and register Keil C51 UV3 version software

I won’t go into the details of the steps here.

2. Open the Keil C51 working interface, as shown below.

1. Create a new project

Click the "Project"---"New Project" option in the menu bar, and the "Create New Project" dialog box will pop up as shown in the figure below. First, select the save path of the project, and then enter the project name (note that it is saved in .uv2 format). After the settings are completed, click the "Save" button to complete the creation of the new project.

2. Select the target device

After the new project is created, the "Select device for target 1" dialog box pops up. You can select the model of the microcontroller in the "Library Directory" option. Here, select the atmel series AT89C51 microcontroller, as shown in the figure below, and then click the "OK" button. At this time, you will be prompted whether to add the standard startup code. Select "OK" to complete the operation.

3. Create a new source program file

After selecting the target device, you can see a new folder "target1" added in the project management area on the left side of the Keil work interface, as shown in the figure below.

Click the "File"---"New" option in the menu bar, the system will automatically create a blank text file with the default name "text 1", enter the following program code,

#include

void main(void)

{

P1=0xfe;

}

After the code is entered, the result is as shown in the figure below.

After entering the program, click the "File"--"Save" command, select the path to save to the new project, and enter the file name to be saved (note to save in .c format).

4. Add the newly created source program file to the project

Click the "+" in front of "Target 1" in the project management to expand the project. Select the "Source Code Group 1" folder, right-click, and select "Add File to Source Code Group 1" in the pop-up dialog box. As shown in the figure below, select the c source code file created earlier, and then click "add" to add the file to the project. The add file dialog box will not disappear automatically, and we can continue to select to add files. If you do not need to continue adding files, click "close" to close the dialog box. At this time, you can see that the new file has been added in the project manager.

5. Compile the program

After the source program is written and added to the project file, the program needs to be checked for errors, compiled and debugged.

Click "Project"--"Rebuild All Target Files" in the menu bar to compile the program. The information output bar will display relevant compilation information. As shown in the figure below, if there is an error, the error location and error type will be indicated (note that the indication of the error location may not be accurate and needs to be carefully checked).

6. Generate burning files

The MCU cannot process C language files. You must convert the C language program into a binary or hexadecimal file that the MCU can recognize. You need to set the compilation options to generate files that the MCU can recognize. Select "Target 1" in the project management area, right-click, and the target setting dialog box pops up.

First, set the clock frequency in the "Project" option and select 11.05692. As shown in the figure below

Then check "Output hex" file in "Output Project" and click OK to complete the setting. Compile the program again. After the compilation is completed, a .hex file will be generated in the project folder. This file is the code file used to burn into the microcontroller.

7. So far, the whole process of establishing a project in Keil has been completed.