Crate rgb_led_pwm_dma_maker 

Led Dma Buffers

Used for creating a PWM waveform using the DMA to control RGB LEDs such as WS2812, WS2812B, SK6812, SK6812-RGBW. Based on Phil’s Lab’s RGB Led video

Example

const led_array: [RGB; 3] = [RGB::new(255,0,0), RGB::new(0,0,255), RGB::new(0,0,255)];
// Calculate the dma buffer's length at compile time
const DMA_BUFFER_LEN: usize = calc_dma_buffer_length(RGB::BIT_COUNT, led_array.len(), RESET_LENGTH);
// Initialize a new DMA buffer
let mut dma_buffer = LedDmaBuffer::<DMA_BUFFER_LEN>::new(t1h, t0h, LedDataComposition::GRB);
// Set the DMA buffer
dma_buffer.set_dma_buffer(&led_array, None).unwrap();
// Create a pwm waveform using the dma buffer
let mut dma1_ch2 = p.DMA1_CH2.into_ref();
pwm.waveform_ch1(&mut dma1_ch2, dma_buffer.get_dma_buffer()).await;

Full examples can be found in the examples folder.

Structs

LedDmaBuffer

A generic DMA Buffer

RGB

Represents a RGB LED

RGBW

Represents a RGBW LED

Enums

LedDataComposition

The order of colors of the data sent to the LED

LedDmaError

Error Types

Traits

RgbLedColor

Implemented by RGB & RGBW

Functions

calc_dma_buffer_length

Calculates the required DMA buffer length for a LedDmaBuffer at compile time.