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LED with WS2812B and STM32F1?

Jasser Hammett

I would like RGB LED chip WS2812B used as a signal LED and thus seeking what the easiest way over 1Wire bus WS2812B set basic colors with one or two LEDs.
This approach me for one LED comes complicated
mikrocontroller.bplaced.net/.../

A simple idea?

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  • 0 in reply to Harib Suntar

    This specific protocol is fast for using interrupts for each I/O pin toggle. But it is still so slow that it isn't fun to turn off interrupts while busy-waiting - especially when the number of chained LED:s is high, since all bits has to be sent out in a sequence to control the last LED in the chain.

    So SPI with FIFO or DMA would be the optimal hardware-acceleration. SPI is lovely to hardware-accelerate a number of serial protocols.

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  • 0 in reply to Harib Suntar

    This specific protocol is fast for using interrupts for each I/O pin toggle. But it is still so slow that it isn't fun to turn off interrupts while busy-waiting - especially when the number of chained LED:s is high, since all bits has to be sent out in a sequence to control the last LED in the chain.

    So SPI with FIFO or DMA would be the optimal hardware-acceleration. SPI is lovely to hardware-accelerate a number of serial protocols.

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