subsys/console/console_backend_semihosting.rs

// Copyright 2025 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

#![no_std]

use cortex_m_semihosting::hio::hstdout;
use embedded_io::{ErrorType, Write};

pub struct ConsoleBackend {}

impl ErrorType for ConsoleBackend {
    type Error = pw_status::Error;
}

impl Write for ConsoleBackend {
    fn write(&mut self, buf: &[u8]) -> Result<usize, Self::Error> {
        let mut stdout = hstdout().map_err(|_| Self::Error::Unavailable)?;
        stdout.write_all(buf).map_err(|_| Self::Error::DataLoss)?;
        Ok(buf.len())
    }

    fn flush(&mut self) -> Result<(), Self::Error> {
        Ok(())
    }
}