Lecture 6: GPIO Output: Lighting up a LED

This short video explains how to light up a LED by programming GPIO output. Visit the book website for more information: web.eece.maine.edu/~zhu/book

[@regbot4432]

I was looking through internet for exactly something like this. Everywhere are just tutorials which are based on "HAL library magic". I have enough magic in high level software programming. I started programming MCUs for sake of reducing number of black boxes. Your videos are awesome!

[@mahmoudsalah7628]

Those figures along side the explanation is making things much easier to grasp. thank you so much for your effort, keep up the good work

[@embeddedsystemswitharmcort9051]

Thanks, will do!

[@andysantosa21]

Your videos are very good to learn basic concepts of microcontroller, thank you

[@attilahun7994]

Short and clear thank you

[@AbhayKant]

Sir, Thank you for making this video.

[@LamNguyen-un5lw]

I have a question about STM32L1 Discovery Kit Lab 9 (ADC) on your website is that: i want to do some thing cool: b) Use the potentiometer to control the brightness of a LED. I used TIM4 for this task, but it did not work. Can you show me where is the problem? Thank you very much!

[@user-mw1uk9sn9w]

In slide describing GPIO output: push-pull, the controller in the picture is inverter, right?

[@VuDucBi]

Where can I learn such command like GPIOB -> MODER &= ~(3UL

[@aswahd]

How to get the book in China?

[@think7677]

I have questions suppose we can generate led pattern which gpio mode use automatically next pattern generated.

[@embeddedsystemswitharmcort9051]

Sorry. I cannot understand your question. Can you rephrase it?

[@think7677]

@@embeddedsystemswitharmcort9051 suppose 4 led pattern done.which gpio mode led pattern1 to led pattern 2 automatically generated then led pattern three and continue..

[@embeddedsystemswitharmcort9051]

You don't need to change the GPIO modes. They should be fixed to the output mode. To switch to a different output pattern, you only need to update the GPIO Output Data Register (ODR).

[@VarunVh2014]

in opendrain configuration for logic zero , output is floating and for logic one output is grounded.. isn't it?

[@embeddedsystemswitharmcort9051]

No. logic 1 makes the output floating.

[@seanjean7961]

@@embeddedsystemswitharmcort9051 I wonder why only the logic 1 make the output floating, it there a reason ? It looks easier to make the output floating in both logic 0 and 1

[@fuschfush7921]

in germany we say kuss auf die Nuss