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Alex thomas
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Alex thomas
Asked: November 25, 2022In:
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Hello, I am new to STM32 and trying to learn exciting stuff. I want to light a single LED from my WS2812B strip. For example, I’ll choose the 6th LED on my computer, and the 6th LED on the strip will light ...Read more

Hello,

I am new to STM32 and trying to learn exciting stuff. I want to light a single LED from my WS2812B strip.

For example, I’ll choose the 6th LED on my computer, and the 6th LED on the strip will light up.

But I am not sure where to start. How can I access to single LED address? And how to get it to work with STM32?

Thanks in advance.

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ledoptoelectronicsstm32stripws2812b
  1. vikas Nagpal

    Welcome, to the community! The question of WS2812 has already been discussed here many times. The thread How to use HAL DMA to generate PWM on P- NUCLEO- WB, for example, also deals with it and refers to a Github driver from Tilen Majerle and a HAL example from Martin Willner. Maybe that will help yRead more

    Welcome, to the community!

    The question of WS2812 has already been discussed here many times. The thread How to use HAL DMA to generate PWM on P- NUCLEO- WB, for example, also deals with it and refers to a Github driver from Tilen Majerle and a HAL example from Martin Willner.

    Maybe that will help you?

    Regards

    Vikas

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Alex thomas
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Alex thomas
Asked: August 31, 2022In:
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I’ve 36 leds on my board. I’ll connect dimmer my board. How can i adjust leds brightness with dimmer? Because i need to manage 36 output pins. How can i do it?

I’ve 36 leds on my board. I’ll connect dimmer my board. How can i adjust leds brightness with dimmer? Because i need to manage 36 output pins. How can i do it?

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brightnessdimmerledsstm32
  1. vikas Nagpal

    You can DMA to the io pins (using a indirect buffer, transferring to GPIO output register). I controlled 48 Leds (16 RGB Leds) this way using a STM32L4(100 LQFP package). But this was to give independent brightness situations to each individual Led. But if all Leds are dimmed together (synchronised)Read more

    You can DMA to the io pins (using a indirect buffer, transferring to GPIO output register). I controlled 48 Leds (16 RGB Leds) this way using a STM32L4(100 LQFP package). But this was to give independent brightness situations to each individual Led.

    But if all Leds are dimmed together (synchronised), also you probably only need a single FET to sink all the Leds current, and use that FET to control the brightness (PWM)

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