LED Counter Using STM32 Black Pill Using STM32CubeIDE

This is a tutorial blog on how to blink 3 LEDs in 8 different combinations. Since 3 in decimal equates to 8 bits in binary I would make it like a counter.

Hardware:

• STM32 Black Pill
• USB-C Cable
• Laptop or desktop
• 3 LEDs
• 4 Jumper Wires
• Breadboard

Software:

• STM32CubeIDE
• STM32CubeProgrammer

• Create a project using STM32CubeIDE and choose the appropriate board type.
• Select GPIO output pins. I have chosen A3, A4 and A5.
• Adjust the clock according to your needs.
• Press Alt + K to generate code.

Check other instructables on my profile for detailed steps.

• Open your project in Project Explorer and follow this path; Core > Src > main.c.
• In main.c, inside int main() code block go to while(1) to write the code to turn on/ off the LEDs in 8 different combinations.
• Add delay so you are able to see the output.
• Save the file and press on debug.

• Right click on the STMProject or use Alt + Shift + W shortcut and press "System Explorer"
• Open the project folder then "Debug" and copy path of .elf file.

• Once the file is saved in STM32CubeIDE connect the STM32 board after bootloader.

Check other instructables for more detailed steps.

• Press on "Open file" and select the .elf from the path copied earlier.
• Press on "Download" on the right.

• Go to the "Erasing & programming" from the menu in the left.
• Paste the File path copied earlier.
• Check the "Full chip erase" and "Download file" and press on "Start automatic mode".

• Once the chip is erased, the code will be ready to upload on the chip.
• To upload, disconnect and reconnect the USB-C cable and your LEDs will start blinking.

Thank you!