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pw_digital_io_mcuxpresso

pw_digital_io_mcuxpresso implements the pw_digital_io interface using the NXP MCUXpresso SDK.

Setup

Use of this module requires setting up the MCUXpresso SDK for use with Pigweed. Follow the steps in pw_build_mcuxpresso to create a pw_source_set for an MCUXpresso SDK. Include the GPIO and PINT driver components in this SDK definition.

This example shows what your SDK setup would look like if using an RT595 board.

import("$dir_pw_third_party/mcuxpresso/mcuxpresso.gni")

pw_mcuxpresso_sdk("sample_project_sdk") {
  manifest = "$dir_pw_third_party/mcuxpresso/evkmimxrt595/EVK-MIMXRT595_manifest_v3_8.xml"
  include = [
    "component.serial_manager_uart.MIMXRT595S",
    "platform.drivers.lpc_gpio.MIMXRT595S",
    "platform.drivers.pint.MIMXRT595S",
    "project_template.evkmimxrt595.MIMXRT595S",
    "utility.debug_console.MIMXRT595S",
  ]
}

Next, specify the pw_third_party_mcuxpresso_SDK GN global variable to specify the name of this source set. Edit your GN args with gn args out.

pw_third_party_mcuxpresso_SDK = "//targets/mimxrt595_evk:sample_project_sdk"

Then, depend on this module in your BUILD.gn to use.

deps = [ dir_pw_digital_io_mcuxpresso ]

Examples

Use pw::digital_io::McuxpressoDigitalIn and pw::digital_io::McuxpressoDigitalOut classes to control GPIO pins.

Example code to use GPIO pins from an NXP SDK board definition:

McuxpressoDigitalOut out(BOARD_INITPINS_D8_GPIO,
                        BOARD_INITPINS_D8_PORT,
                        BOARD_INITPINS_D8_PIN,
                        pw::digital_io::State::kActive);
out.SetState(pw::digital_io::State::kInactive);

McuxpressoDigitalIn in(
   BOARD_INITPINS_D9_GPIO, BOARD_INITPINS_D9_PORT, BOARD_INITPINS_D9_PIN);
auto state = in.GetState();