Fledex.Driver.Impl.Spi (fledex v0.7.0)

This module is a concrete driver that will push the led data through an SPI port.

The protocol used is the one as expected by an WS2801 chip. See the hardware documentation for more information on to wire it.

Options

This driver accepts the following options (most of them are very SPI specific and the defaults are probably good enough):

• :dev: SPI device name (default "spidev0.0", see Circuits.SPI.spi_option/0 for details).
• :mode: set clock polarity and phase (default: mode 0, see Circuits.SPI.spi_option/0 for details),
• :bits_per_word: set the bits per word on the bus (default: 8, see Circuits.SPI.spi_option/0 for details).
• :speed_hz: set the bus speed (default: 1_000_000, see Circuits.SPI.spi_option/0 for details).
• :delay_us: set the delay between transactions (default: 10, see Circuits.SPI.spi_option/0 for details).
• :lsb_first: sets whether the least significant bit is first (default: false, see Circuits.SPI.spi_option/0 for details).
• :color_correction: specifies the color correction (see Fledex.Color.Correction for details)
• :clear_leds: Sets the number of leds that should be cleared during startup (default: 0)