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66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* @ingroup bsp_kit
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*
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* @brief Output character implementation for standard UARTs.
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*/
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/*
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* Copyright (C) 2010, 2011 embedded brains GmbH & Co. KG
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <rtems/bspIo.h>
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#include <bsp/uart-output-char.h>
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static void uart_output_raw(char c)
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{
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while ((CONSOLE_LSR & CONSOLE_LSR_THRE) == 0) {
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/* Wait */
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}
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CONSOLE_THR = c;
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}
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static void uart_output(char c)
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{
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uart_output_raw(c);
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}
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static int uart_input(void)
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{
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if ((CONSOLE_LSR & CONSOLE_LSR_RDR) != 0) {
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return CONSOLE_RBR;
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} else {
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return -1;
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}
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}
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BSP_output_char_function_type BSP_output_char = uart_output;
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BSP_polling_getchar_function_type BSP_poll_char = uart_input;
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