/* * Copyright 2010 Steffen Vogel, Chair for Operating Systems, * RWTH Aachen University * * 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. * * This file is part of MetalSVM. */ /** * @author Steffen Vogel * @file arch/x86/include/asm/uart.h * @brief COM port related code */ #ifndef __ARCH_UART_H__ #define __ARCH_UART_H__ #include #ifdef __cplusplus extern "C" { #endif #ifdef CONFIG_UART /** @brief Initialize VGA output and clear the screen */ void uart_init(void); /** @brief Send a single character to the uart * * @return The original input character casted to int */ void uart_putchar(char c); /** @brief Receive a single character on the uart * * @return The original input character casted to int */ char uart_getchar(void); /** @brief Simple string output on screen. * * If you want a new line you will have to "\\n". * * @return Length of output in bytes */ void uart_puts(const char *str); /** @brief Simple string output on screen. * * If you want a new line you will have to "\\n". * * @return Length of output in bytes */ int uart_gets(char *str, size_t len); #endif #ifdef __cplusplus } #endif #endif