diff options
Diffstat (limited to '')
| -rw-r--r-- | bsps/arm/tms570/console/tms570-sci.c | 79 |
1 files changed, 34 insertions, 45 deletions
diff --git a/bsps/arm/tms570/console/tms570-sci.c b/bsps/arm/tms570/console/tms570-sci.c index 5eba1f7c92..63f8e7c8ee 100644 --- a/bsps/arm/tms570/console/tms570-sci.c +++ b/bsps/arm/tms570/console/tms570-sci.c @@ -1,13 +1,16 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + /** * @file * * @ingroup RTEMSBSPsARMTMS570 * - * @brief Serial communication interface (SCI) functions definitions. + * @brief This source file contains the Console Driver implementation using the + * Serial Communication Interface (SCI). */ /* - * Copyright (c) 2014 Premysl Houdek <kom541000@gmail.com> + * Copyright (C) 2014 Premysl Houdek <kom541000@gmail.com> * * Google Summer of Code 2014 at * Czech Technical University in Prague @@ -15,26 +18,37 @@ * 166 36 Praha 6 * Czech Republic * - * Based on LPC24xx and LPC1768 BSP - * by embedded brains GmbH and others - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. */ #include <bspopts.h> #include <termios.h> #include <rtems/termiostypes.h> -#include <bsp/tms570-sci.h> #include <bsp/tms570-sci-driver.h> #include <rtems/console.h> #include <bsp.h> #include <bsp/fatal.h> #include <bsp/irq.h> -#define TMS570_SCI_BUFFER_SIZE 1 - /** * @brief Table including all serial drivers * @@ -156,33 +170,6 @@ rtems_device_driver console_initialize( } /** - * @brief Reads chars from HW - * - * Reads chars from HW peripheral specified in driver context. - * TMS570 does not have HW buffer for serial line so this function can - * return only 0 or 1 char - * - * @param[in] ctx context of the driver - * @param[out] buf read data buffer - * @param[in] N size of buffer - * @retval x Number of read chars from peripherals - */ -static int tms570_sci_read_received_chars( - tms570_sci_context * ctx, - char * buf, - int N) -{ - if ( N < 1 ) { - return 0; - } - if ( ctx->regs->RD != 0 ) { - buf[0] = ctx->regs->RD; - return 1; - } - return 0; -} - -/** * @brief Enables RX interrupt * * Enables RX interrupt source of SCI peripheral @@ -335,23 +322,25 @@ static void tms570_sci_interrupt_handler(void * arg) { rtems_termios_tty *tty = arg; tms570_sci_context *ctx = rtems_termios_get_device_context(tty); - char buf[TMS570_SCI_BUFFER_SIZE]; - size_t n; /* * Check if we have received something. */ if ( (ctx->regs->FLR & TMS570_SCI_FLR_RXRDY ) == TMS570_SCI_FLR_RXRDY ) { - n = tms570_sci_read_received_chars(ctx, buf, TMS570_SCI_BUFFER_SIZE); - if ( n > 0 ) { - /* Hand the data over to the Termios infrastructure */ - rtems_termios_enqueue_raw_characters(tty, buf, n); - } + char buf[1]; + + /* Read the received byte */ + buf[0] = ctx->regs->RD & 0x000000FF; + + /* Hand the data over to the Termios infrastructure */ + rtems_termios_enqueue_raw_characters(tty, buf, 1); } /* * Check if we have something transmitted. */ if ( (ctx->regs->FLR & TMS570_SCI_FLR_TXRDY ) == TMS570_SCI_FLR_TXRDY ) { + size_t n; + n = tms570_sci_transmitted_chars(ctx); if ( n > 0 ) { /* |