1 // Copyright 2024 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 #include "pw_stream_uart_mcuxpresso/interrupt_safe_writer.h" 15 16 #include "fsl_clock.h" 17 18 namespace pw::stream { 19 Enable()20pw::Status InterruptSafeUartWriterMcuxpresso::Enable() { 21 usart_config_t usart_config; 22 USART_GetDefaultConfig(&usart_config); 23 usart_config.baudRate_Bps = baudrate_; 24 usart_config.enableRx = false; 25 usart_config.enableTx = true; 26 27 PW_TRY(element_controller_.Acquire()); 28 29 if (USART_Init(base(), &usart_config, CLOCK_GetFreq(clock_name_)) != 30 kStatus_Success) { 31 element_controller_.Release().IgnoreError(); 32 return pw::Status::Internal(); 33 } 34 35 return pw::OkStatus(); 36 } 37 DoWrite(pw::ConstByteSpan data)38pw::Status InterruptSafeUartWriterMcuxpresso::DoWrite(pw::ConstByteSpan data) { 39 const status_t hal_status = USART_WriteBlocking( 40 base(), reinterpret_cast<const uint8_t*>(data.data()), data.size_bytes()); 41 return hal_status == kStatus_Success ? pw::OkStatus() 42 : pw::Status::Internal(); 43 } 44 45 } // namespace pw::stream 46