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// Copyright 2024 The Pigweed Authors
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
#include "pw_stream_uart_mcuxpresso/interrupt_safe_writer.h"
#include "fsl_clock.h"
namespace pw::stream {
pw::Status InterruptSafeUartWriterMcuxpresso::Enable() {
usart_config_t usart_config;
usart_config.baudRate_Bps = baudrate_;
usart_config.enableRx = false;
usart_config.enableTx = true;
if (USART_Init(base(), &usart_config, CLOCK_GetFreq(clock_name_)) !=
kStatus_Success) {
return pw::Status::Internal();
return pw::OkStatus();
pw::Status InterruptSafeUartWriterMcuxpresso::DoWrite(pw::ConstByteSpan data) {
const status_t hal_status = USART_WriteBlocking(
base(), reinterpret_cast<const uint8_t*>(, data.size_bytes());
return hal_status == kStatus_Success ? pw::OkStatus()
: pw::Status::Internal();
} // namespace pw::stream