1. Hardware used

Punctual atom Mini board, the main control STM32F103RCT6.

Peripherals used: LED, buttons. Schematic:
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2. Generate project

2.1. Create a project

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2.2. Search and double-click to select the main control chip

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2.3. Configuration

Configure the clock source
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Configure the debug mode (you can check it if you need ST-Link download and debug)

Configure the clock tree (you can directly enter 72 in HCLK, and then press Enter to automatically configure)

2.4. Configuration project directory

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If checked, c files and header files will be generated separately

2.5. Peripherals used in configuration

PA8: LED0.
PC5: KEY0, configuration input mode, key scanning.
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2.6. Generate code

After the configuration is complete, click Generate Code.
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3. Directory structure

The generated project directory is as follows:
Core: The source files and header files of the peripherals used in the software generation, main.c is also here. Equivalent to User + Hardware in MDK.
Drivers: HAL library driver files, chip startup files.
MDK-ARM: MDK project file. Enter the MDK-ARM directory to open the project.
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4. Code

Add the following code in main.c.

  while (1)
  {
    
    
	if(0 == HAL_GPIO_ReadPin(KEY0_GPIO_Port, KEY0_Pin))
	{
    
    
		HAL_Delay(20);
		if(0 == HAL_GPIO_ReadPin(KEY0_GPIO_Port, KEY0_Pin))
		{
    
    
			// 输出高电平
			// HAL_GPIO_WritePin(LED0_GPIO_Port, LED0_Pin, GPIO_PIN_SET);
			// 输出低电平
			// HAL_GPIO_WritePin(LED0_GPIO_Port, LED0_Pin, GPIO_PIN_RESET);
			// 反转
			HAL_GPIO_TogglePin(LED0_GPIO_Port, LED0_Pin);
		}
	}
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }

Among them: pin aliases such as LED0_GPIO_Port and LED0_Pin are defined in main.h.

5. Effect verification

Compile, burn, and view the results.

Effect: Press the button and the LED will reverse.

STM32CubeMX series 02 - LED, button

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