esp-idf/components/bootloader_support/include_bootloader/bootloader_console.h

// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
//
// 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
//
//     http://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.

#pragma once

/**
 * @brief Initialize console output (UART or USB)
 */
void bootloader_console_init(void);

/**
 * @brief Flush and otherwise de-initialize console output.
 */
void bootloader_console_deinit(void);

/**
 * @brief "Write character to USB" function for ets_install_putc1.
 * Only defined if USB CDC is used for console output.
 */
void bootloader_console_write_char_usb(char c);