Module imxrt_hal::spi

SPI support

The module provides an implementation of the embedded_hal::spi::FullDuplex trait. All blocking implementations are provided by the default implementations from embedded_hal.

Chip selects (CS) for SPI peripherals

The iMXRT SPI peripherals have one or more peripheral-controlled chip selects (CS). Using the peripheral-controlled CS means that you do not need a GPIO to coordinate SPI operations. The peripheral-controlled CS is disabled by default. Use the enable_chip_select_N, where N is the CS number, to enable the peripheral-controlled CS. Your hardware must be wired to accomodate this selection. If you do not want to use the peripheral-controlled CS, you may select your own GPIO.

Example

use imxrt_hal;
use embedded_hal::blocking::spi::Transfer;

let mut peripherals = imxrt_hal::Peripherals::take().unwrap();

let (_, _, _, spi4_builder) = peripherals.spi.clock(
    &mut peripherals.ccm.handle,
    imxrt_hal::ccm::spi::ClockSelect::Pll2,
    imxrt_hal::ccm::spi::PrescalarSelect::LPSPI_PODF_5,
);

let mut spi4 = spi4_builder.build(
    peripherals.iomuxc.b0.p02,
    peripherals.iomuxc.b0.p01,
    peripherals.iomuxc.b0.p03,
);

spi4.enable_chip_select_0(peripherals.iomuxc.b0.p00);

spi4.set_clock_speed(imxrt_hal::spi::ClockSpeed(1_000_000)).unwrap();

let mut buffer: [u8; 3] = [1, 2, 3];
spi4.transfer(&mut buffer).unwrap();

Structs

Builder	A SPI builder that can build a SPI peripheral
BusIdleTimeoutError	Indicates an error when computing the parameters that control the bus idle timeout
ClockSpeed	SPI Clock speed, in Hz
ClockSpeedError	Indicates an error when computing the parameters that control the clock speed.
ModeError	Indicates an error when computing the parameters that control the mode.
PinLowTimeoutError	Indicates an error when computing the parameters that control the pin low timeout
SPI	An SPI master
Unclocked	Unclocked SPI modules

Enums

Error

An error that occured during a SPI operation