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Blinking Light Program

Introduction​

Implement a simple blinking light program to start your STM32 journey.

Hardware​

STM32F103C8T6 core board

Core Board

Pin PC13 conducts at low level.

Software​

Configure GPIO​

Select GPIO_Output, remember to generate the code.

Configure GPIO

Compile​

Compile

Download​

Run flash.bat to download the program
.\flash.bat

Download

At this point, the green LED corresponding to PC13 should light up.

Edit the Core/Src/main.c File​

Add the following code before the /* USER CODE END WHILE */ line:

    HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET); // Set PC13 high
    HAL_Delay(500);
    HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET); // Set PC13 low
    HAL_Delay(500);

Edit File

Compile & Download​

The blinking light program is now complete. Isn’t it simple?

Conclusion​

This article has shown you how to implement a blinking light program. Everything complex starts from something simple. Keep it up!

Copyright Notice: Free to Share - Non-commercial - No Derivatives - Keep Author - Keep Source

Author: afxcn

Source: https://gostartkit.com/docs/stm32/flashing-light

Date: June 18, 2025