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