| .. _module-pw_stream_uart_mcuxpresso: |
| |
| ========================= |
| 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| This module will likely be superseded by a future ``pw_uart`` interface.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 |
| ===== |
| .. code-block:: cpp |
| |
| 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)); |