141 lines
4.2 KiB
C
141 lines
4.2 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011 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 AVR/pal_lld.c
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* @brief AVR GPIO low level driver code.
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*
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* @addtogroup PAL
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* @{
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*/
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#include "ch.h"
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#include "hal.h"
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#if HAL_USE_PAL || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief AVR GPIO ports configuration.
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* @details GPIO registers initialization.
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*
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* @param[in] config the AVR ports configuration
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*
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* @notapi
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*/
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void _pal_lld_init(const PALConfig *config) {
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#if defined(PORTA) || defined(__DOXYGEN__)
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PORTA = config->porta.out;
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DDRA = config->porta.dir;
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#endif
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#if defined(PORTB) || defined(__DOXYGEN__)
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PORTB = config->portb.out;
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DDRB = config->portb.dir;
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#endif
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#if defined(PORTC) || defined(__DOXYGEN__)
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PORTC = config->portc.out;
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DDRC = config->portc.dir;
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#endif
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#if defined(PORTD) || defined(__DOXYGEN__)
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PORTD = config->portd.out;
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DDRD = config->portd.dir;
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#endif
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#if defined(PORTE) || defined(__DOXYGEN__)
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PORTE = config->porte.out;
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DDRE = config->porte.dir;
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#endif
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#if defined(PORTF) || defined(__DOXYGEN__)
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PORTF = config->portf.out;
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DDRF = config->portf.dir;
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#endif
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#if defined(PORTG) || defined(__DOXYGEN__)
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PORTG = config->portg.out;
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DDRG = config->portg.dir;
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#endif
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}
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/**
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* @brief Pads mode setup.
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* @details This function programs a pads group belonging to the same port
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* with the specified mode.
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*
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* @param[in] port the port identifier
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* @param[in] mask the group mask
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* @param[in] mode the mode
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*
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* @note This function is not meant to be invoked directly by the application
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* code.
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* @note @p PAL_MODE_UNCONNECTED is implemented as output as recommended by
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* the AVR Family User's Guide. Unconnected pads are set to input
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* with pull-up by default.
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*
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* @notapi
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*/
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void _pal_lld_setgroupmode(ioportid_t port,
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ioportmask_t mask,
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iomode_t mode) {
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switch (mode) {
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case PAL_MODE_RESET:
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case PAL_MODE_INPUT:
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case PAL_MODE_INPUT_ANALOG:
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port->dir &= ~mask;
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port->out &= ~mask;
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break;
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case PAL_MODE_UNCONNECTED:
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case PAL_MODE_INPUT_PULLUP:
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port->dir &= ~mask;
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port->out |= mask;
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case PAL_MODE_OUTPUT_PUSHPULL:
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port->dir |= mask;
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break;
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}
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}
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#endif /* HAL_USE_PAL */
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/** @} */
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