forked from Imagelibrary/rtems
144 lines
3.8 KiB
C
144 lines
3.8 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 RTEMSBSPsARMTMS570
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*
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* @brief This source file contains the definition of ::BSP_output_char and
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* ::BSP_poll_char.
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*/
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/*
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* Copyright (C) 2023 embedded brains GmbH & Co. KG
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* Copyright (C) 2014 Premysl Houdek <kom541000@gmail.com>
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*
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* Google Summer of Code 2014 at
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* Czech Technical University in Prague
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* Zikova 1903/4
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* 166 36 Praha 6
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* Czech Republic
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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 <rtems/sysinit.h>
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#include <stdint.h>
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#include <string.h>
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#include <bsp/tms570-sci-driver.h>
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#define TMS570_CONSOLE (&driver_context_table[0])
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/**
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* @brief Puts chars into peripheral
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*
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* debug functions always use serial dev 0 peripheral
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*
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* @retval Void
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*/
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static void tms570_debug_console_out(char ch)
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{
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tms570_sci_context *ctx = TMS570_CONSOLE;
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volatile tms570_sci_t *regs = ctx->regs;
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while ( true ) {
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rtems_interrupt_level level;
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while ( ( regs->FLR & TMS570_SCI_FLR_TXRDY ) == 0) {
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/* Wait */
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}
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rtems_interrupt_disable( level );
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if ( ( regs->FLR & TMS570_SCI_FLR_TXRDY ) != 0) {
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regs->TD = ch;
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rtems_interrupt_enable( level );
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break;
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}
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rtems_interrupt_enable( level );
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}
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while ( ( regs->FLR & TMS570_SCI_FLR_TX_EMPTY ) == 0) {
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/* Wait */
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}
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}
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static void tms570_debug_console_init(void)
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{
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tms570_sci_context *ctx = TMS570_CONSOLE;
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struct termios term;
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tms570_sci_initialize(ctx);
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memset(&term, 0, sizeof(term));
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term.c_ospeed = B115200;
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tms570_sci_set_attributes(&ctx->base, &term);
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BSP_output_char = tms570_debug_console_out;
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}
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static void tms570_debug_console_early_init(char c)
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{
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tms570_debug_console_init();
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tms570_debug_console_out(c);
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}
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/**
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* @brief debug console input
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*
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* debug functions always use serial dev 0 peripheral
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*
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* @retval x Read char
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* @retval -1 No input character available
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*/
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static int tms570_debug_console_in( void )
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{
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tms570_sci_context *ctx = TMS570_CONSOLE;
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volatile tms570_sci_t *regs = ctx->regs;
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rtems_interrupt_level level;
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int c;
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rtems_interrupt_disable(level);
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if ( regs->FLR & TMS570_SCI_FLR_RXRDY ) {
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c = (unsigned char) regs->RD;
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} else {
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c = -1;
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}
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rtems_interrupt_enable(level);
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return c;
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}
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BSP_output_char_function_type BSP_output_char =
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tms570_debug_console_early_init;
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BSP_polling_getchar_function_type BSP_poll_char = tms570_debug_console_in;
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RTEMS_SYSINIT_ITEM(
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tms570_debug_console_init,
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RTEMS_SYSINIT_BSP_START,
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RTEMS_SYSINIT_ORDER_LAST_BUT_5
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);
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