pw_stream_uart_mcuxpresso#

pw_stream_uart_mcuxpresso implements the pw_stream interface for reading and writing to a UART using the NXP MCUXpresso SDK.

Note

This module will likely be superseded by a future pw_uart interface.

Setup#

This module requires a little setup:

  1. Use pw_build_mcuxpresso to create a pw_source_set for an MCUXpresso SDK.

  2. Include the debug console component in this SDK definition.

  3. Specify the pw_third_party_mcuxpresso_SDK GN global variable to specify the name of this source set.

  4. Use a target that calls pw_sys_io_mcuxpresso_Init in pw_boot_PreMainInit or similar.

The name of the SDK source set must be set in the “pw_third_party_mcuxpresso_SDK” GN arg

Usage#

constexpr uint32_t kFlexcomm = 0;
constexpr uint32_t kBaudRate = 115200;
std::array<std::byte, 20> kBuffer = {};

auto stream = UartStreamMcuxpresso{USART0,
                                   kBaudRate,
                                   kUSART_ParityDisabled,
                                   kUSART_OneStopBit,
                                   kBuffer};

PW_TRY(stream.Init(CLOCK_GetFlexcommClkFreq(kFlexcomm)));

std::array<std::byte, 10> to_write = {};
PW_TRY(stream.Write(to_write));