pal_lld.c
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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 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/>.
---
A special exception to the GPL can be applied should you wish to distribute
a combined work that includes ChibiOS/RT, without being obliged to provide
the source code for any proprietary components. See the file exception.txt
for full details of how and when the exception can be applied.
*/
/**
* @file LPC214x/pal_lld.c
* @brief LPC214x FIO low level driver code.
*
* @addtogroup PAL
* @{
*/
#include "ch.h"
#include "hal.h"
#if HAL_USE_PAL || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief LPC214x I/O ports configuration.
* @details FIO units and PINSEL registers initialization.
*
* @param[in] config the LPC214x ports configuration
*
* @notapi
*/
void _pal_lld_init(const PALConfig *config) {
/* Enables the access through the fast registers.*/
SCS = 3;
/* I/O pads initial assignment, device drivers may change this setup at a
* later time.*/
PINSEL0 = config->pinsel0;
PINSEL1 = config->pinsel1;
PINSEL2 = config->pinsel2;
/* I/O pads direction initial setting.*/
FIO0Base->FIO_MASK = 0;
FIO0Base->FIO_PIN = config->P0Data.pin;
FIO0Base->FIO_DIR = config->P0Data.dir;
FIO1Base->FIO_MASK = 0;
FIO1Base->FIO_PIN = config->P1Data.pin;
FIO1Base->FIO_DIR = config->P1Data.dir;
}
/**
* @brief Pads mode setup.
* @details This function programs a pads group belonging to the same port
* with the specified mode.
* @note @p PAL_MODE_UNCONNECTED is implemented as push pull output with
* high state.
* @note This function does not alter the @p PINSELx registers. Alternate
* functions setup must be handled by device-specific code.
*
* @param[in] port the port identifier
* @param[in] mask the group mask
* @param[in] mode the mode
*
* @notapi
*/
void _pal_lld_setgroupmode(ioportid_t port,
ioportmask_t mask,
iomode_t mode) {
switch (mode) {
case PAL_MODE_RESET:
case PAL_MODE_INPUT:
port->FIO_DIR &= ~mask;
break;
case PAL_MODE_UNCONNECTED:
port->FIO_PIN |= mask;
case PAL_MODE_OUTPUT_PUSHPULL:
port->FIO_DIR |= mask;
break;
}
}
#endif /* HAL_USE_PAL */
/** @} */