Controlling GPIO digital output on STM8

This tutorial kicks off by showing you how to create a GitHub repository, which is super handy for keeping your lecture materials organized—there’s a link you can check out in the video description.
Next up, we dive into clock settings, making sure your CPU pre-scaler and internal clock are set to run at a snappy 16 MHz.
We then get into the nitty-gritty of setting up digital outputs, detailing how to configure ports and pins, plus making the crucial choice between open drain or push-pull modes.
Don’t forget to keep your datasheet handy because it’s a game-changer for configuring things like pin speed, whether you need it slow (up to 2 MHz) or fast (up to 10 MHz).
In the video, you’ll see how to use GPIO mode for output, starting with it set to low and configured to slow, ensuring your pin is just right.
We’ve also got some handy commands for controlling outputs, allowing you to switch lights to high, low, or reverse by leveraging GPIO and ODR for smooth operation.
Finally, we’ll break down the steps for shifting bits to get the output you want, especially focusing on using port B and pin B5 for this task..

When you’re setting things up, it’s crucial to keep in mind that any pins not in use are set to 0.
This little trick helps avoid any accidental hiccups.
You also want to make sure both the delay and duration are set to 1000 to keep everything in sync.
Flashing plays a key role here, as it sends out signals to execute the instructions you’ve programmed.
If you see that blinking light, that’s your cue that the port is doing its job right! To make things even easier, you can simplify the port configuration by using just one byte for all the pins.
This method is super handy for managing multiple ports at once, especially when you’re controlling things like LEDs by tweaking the voltage levels on the microcontroller pins, particularly pin B5..

So, let’s dive into the setup! Pin B5 starts off in a low state, which means it turns on the LED by connecting it to ground or zero voltage.
Now, when you flip Pin B5 to a high state, the LED stays lit, which is a bit unusual.
This constant glow in both states hints that the setup is purposely designed to work that way.
If you want to spice things up, you can change this behavior by sending a quick high pulse to Pin B5.
With this tweak, the LED will start to blink, lighting up only while the high pulse is active..

Controlling GPIO pins is pretty straightforward! First, you’ll need to input both the port and pin information.
From there, you can use specific commands to manipulate the state of your LED connected to those pins.
For example, using the ‘light high’ command will activate the port pin, providing power to light up the LED.
On the flip side, if you want to turn the LED off, just use the ‘light low’ command to cut off its power supply..

So, let’s talk about a handy command called ‘light reverse.’ This command is super cool because it toggles the LED’s current state—if your LED is on, it turns it off, and if it’s off, it turns it on.
If you want precise control over your LEDs, you should definitely check out the commands ‘light high,’ ‘light low,’ and ‘light reverse.’ The session we had went over how to control digital outputs using GPIO, which is pretty essential.
And guess what? In the next session, we’ll dive into how to control digital inputs with GPIO.
Stay tuned!.