117 lines
3.5 KiB
C
117 lines
3.5 KiB
C
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/*
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ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file AT91SAM7X/serial_lld.c
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* @brief AT91SAM7X low level serial driver code
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* @addtogroup AT91SAM7X_SERIAL
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* @{
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*/
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#include <ch.h>
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#include <serial.h>
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#include "at91lib/aic.h"
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/** @brief Driver default configuration.*/
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static const SerialDriverConfig default_config = {
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};
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/*===========================================================================*/
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/* Low Level Driver local functions. */
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/*===========================================================================*/
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/**
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* @brief USART initialization.
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* @param[in] u pointer to an USART I/O block
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* @param[in] config the architecture-dependent serial driver configuration
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*/
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void usart_init(AT91PS_USART u, const SerialDriverConfig *config) {
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/* Disables IRQ sources and stop operations.*/
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u->US_IDR = 0xFFFFFFFF;
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u->US_CR = AT91C_US_RSTRX | AT91C_US_RSTTX | AT91C_US_RSTSTA;
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/* New parameters setup.*/
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if (config->mr & AT91C_US_OVER)
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u->US_BRGR = MCK / (config->speed * 8);
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else
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u->US_BRGR = MCK / (config->speed * 16);
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u->US_MR = config->mr;
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u->US_RTOR = 0;
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u->US_TTGR = 0;
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/* Enables operations and IRQ sources.*/
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u->US_CR = AT91C_US_RXEN | AT91C_US_TXEN | AT91C_US_DTREN | AT91C_US_RTSEN;
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u->US_IER = AT91C_US_RXRDY | AT91C_US_OVRE | AT91C_US_FRAME | AT91C_US_PARE |
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AT91C_US_RXBRK;
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}
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/**
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* @brief USART de-initialization.
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* @param[in] u pointer to an USART I/O block
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*/
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void usart_deinit(AT91PS_USART u) {
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}
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/*===========================================================================*/
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/* Low Level Driver interrupt handlers. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Low Level Driver exported functions. */
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/*===========================================================================*/
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/**
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* Low level serial driver initialization.
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*/
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void sd_lld_init(void) {
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}
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/**
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* @brief Low level serial driver configuration and (re)start.
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*
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* @param[in] sdp pointer to a @p SerialDriver object
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* @param[in] config the architecture-dependent serial driver configuration.
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* If this parameter is set to @p NULL then a default
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* configuration is used.
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*/
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void sd_lld_start(SerialDriver *sdp, const SerialDriverConfig *config) {
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if (config == NULL)
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config = &default_config;
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}
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/**
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* @brief Low level serial driver stop.
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* @details De-initializes the USART, stops the associated clock, resets the
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* interrupt vector.
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*
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* @param[in] sdp pointer to a @p SerialDriver object
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*/
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void sd_lld_stop(SerialDriver *sdp) {
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}
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/** @} */
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