1. Preparations

Hardware preparation

Development board
first need to prepare a Cubs sent IoT development board and connected to the computer via the USB cable.

Software ready

Need to install Keil - MDK chip and the corresponding packet so that the compiler generated code and downloading, refer MDK installation tutorial

2. Create Project

One is chosen

Open STM32CubeMX, open MCU Selector:

Search and select chip STM32L431RCT6:

Clock Source

If you choose to use external high-speed clock (HSE), you need to configure the RCC in System Core;
If you use the default internal clock (HSI), you can skip this step;

Here I have to use an external clock:

Configurable GPIO pins

View schematics, determined to control the LED pins, our LED used here is PC13 pin.

So then we select the configuration PC13pins:

Configuring the Clock Tree

STM32L4 the highest clock speed to 80M, so the configuration PLL, the last HCLK = 80Mhzto:

Generating project settings

Code generation is provided

The last set generates a separate initialization file:

Generate code

Click GENERATE CODEto generate MDK-V5 project:

Generate success

3. In the MDK write, compile, download user code

Write user code

STM32CubeMX generated code directory is as follows:

Enter the MDK-ARM文件夹directory, open the project:

In main.cthe main function simply write user code:

1 while (1)
2   {
3     /* USER CODE END WHILE */
4     /* USER CODE BEGIN 3 */
5     HAL_Delay(200);
6     HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_13);
7   }

Compiled code

Click the button to compile the project as shown

Set Downloader

As shown in Figure Click the button to open the Settings page

Download settings, select "ST-Link Debugger", and click "Settings".

Check the "Reset and Run" option under "Flash Download" menu, after the burning process has reached the MCU automatically reset and run the purpose of the program.

Download run

Click "LOAD" button to burn code into the device.

Burning success

Experimental phenomena

So far, we've learned how to use STM32CubeMX quickly generate MDK engineering, light up a LED, how about the next one to use STM32CubeMX initialize the GPIO key detection.

Microcontroller based - using an LED lighting output GPIO