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// Copyright 2023 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
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// 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/stream.h"
namespace pw::stream {
UartStreamMcuxpresso::~UartStreamMcuxpresso() { USART_RTOS_Deinit(&handle_); }
Status UartStreamMcuxpresso::Init(uint32_t srcclk) {
config_.srcclk = srcclk;
if (USART_RTOS_Init(&handle_, &uart_handle_, &config_) != kStatus_Success) {
return Status::Internal();
}
return OkStatus();
}
StatusWithSize UartStreamMcuxpresso::DoRead(ByteSpan data) {
size_t read = 0;
if (const auto status =
USART_RTOS_Receive(&handle_,
reinterpret_cast<uint8_t*>(data.data()),
data.size(),
&read);
status != kStatus_Success) {
USART_TransferAbortReceive(base_, &uart_handle_);
return StatusWithSize(Status::Internal(), 0);
}
return StatusWithSize(read);
}
Status UartStreamMcuxpresso::DoWrite(ConstByteSpan data) {
if (USART_RTOS_Send(
&handle_,
reinterpret_cast<uint8_t*>(const_cast<std::byte*>(data.data())),
data.size()) != kStatus_Success) {
return Status::Internal();
}
return OkStatus();
}
} // namespace pw::stream
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