STM32 Black Pill | Using HAL Programming to Use I2C LCD

In this tutorial, we'll use an STM32 Black Pill to program an I²C LCD on STM32CubeIDE using HAL programming.

Hardware:

• STM32 Black Pill
• 16*2 I²C LCD
• Laptop or desktop
• USB-C cable
• Few jumper wires

Software:

• STM32CubeIDE
• STM32CubeProgrammer

• Create a new STM32 project from File > New > STM32 Project

• Select the appropriate board.

• Go to Connectivity > I2C1 and enable it. This will set SDA to pin 43 and SCL to pin 42.\
• Go to System Core > RCC > HSE > Crystal/Ceramic Resonator.

• Configure your board's clock.
• Save using Ctrl + S.

• Go to the project file in project explorer, then Core > Src > main.c.
• Inside the function int main(void) write the following program:

  HD44780_Init(2);
  HD44780_Clear();
  HD44780_SetCursor(0,0);
  HD44780_PrintStr("Hi from Anjan");
  HD44780_SetCursor(0,1);
  HD44780_PrintStr("Singh");
  HAL_Delay(2000);

Note: The code may vary according to your micrcontroller.

• Save the file and debug.

• We will bootload STM using USB, this tutorial does not use ST-Link.
• Next, press on "Open file" and select the .elf file from the project folder.
• Press on "Download".

• Go to "Erasing and Programming" from the menu in the left.
• Go to file path and select the .elf file and press "Start automatic mode".
• Once compiled, disconnect and reconnect the STM board.

You should see the preferred result.

Thank you.