STM32 Visual Tracking Car Tutorial 3.6 Color LED

Posted by Fiona Su on May 4, 2020

6.STM32 platform-------Color LED

1) Preparation

1-1 STM32 expansion board

1-2 STM32 smart car

1-3 Color RGB module

2)Purpose of Experimental

In this lesson, we mainly to learn how to control GPIO port of STM32. When the car is powered on, press the start button next to the PS2 mark. We will see that colorful lights are flashing.

3)Principle of experimental

The RGB light is packaged with three LEDs (red, green, and blue). Different colors (256*256*256) can be mixed by controlling the brightness of the three LEDs (256 brightness levels are optional).

As can be seen from the circuit schematic diagram, the RGB light is a common cathode LED, one pin is grounded, and the remaining three RGB pins are respectively connected to the PA1, PA6, and PA7 pins on the STM32 main control board. Each LED lamp needs to be connected in series with a 220Ωresistor as the current limiting resistor. We only need to control the corresponding pin to be high level on the STM32 main control board to illuminate the corresponding LED.

2) Experimental Steps

4-1 About the schematic