155 lines
5.8 KiB
C
155 lines
5.8 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 AT91SAM7/pal_lld.c
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* @brief AT91SAM7 PIO 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 AT91SAM7 I/O ports configuration.
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* @details PIO registers initialization.
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*
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* @param[in] config the AT91SAM7 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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uint32_t ports = (1 << AT91C_ID_PIOA);
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#if (SAM7_PLATFORM == SAM7X128) || (SAM7_PLATFORM == SAM7X256) || \
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(SAM7_PLATFORM == SAM7X512)
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ports |= (1 << AT91C_ID_PIOB);
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#endif
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AT91C_BASE_PMC->PMC_PCER = ports;
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/*
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* PIOA setup.
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*/
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AT91C_BASE_PIOA->PIO_PPUER = config->P0Data.pusr; /* Pull-up as spec.*/
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AT91C_BASE_PIOA->PIO_PPUDR = ~config->P0Data.pusr;
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AT91C_BASE_PIOA->PIO_PER = 0xFFFFFFFF; /* PIO enabled.*/
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AT91C_BASE_PIOA->PIO_ODSR = config->P0Data.odsr; /* Data as specified.*/
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AT91C_BASE_PIOA->PIO_OER = config->P0Data.osr; /* Dir. as specified.*/
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AT91C_BASE_PIOA->PIO_ODR = ~config->P0Data.osr;
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AT91C_BASE_PIOA->PIO_IFDR = 0xFFFFFFFF; /* Filter disabled.*/
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AT91C_BASE_PIOA->PIO_IDR = 0xFFFFFFFF; /* Int. disabled.*/
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AT91C_BASE_PIOA->PIO_MDDR = 0xFFFFFFFF; /* Push Pull drive.*/
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AT91C_BASE_PIOA->PIO_ASR = 0xFFFFFFFF; /* Peripheral A.*/
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AT91C_BASE_PIOA->PIO_OWER = 0xFFFFFFFF; /* Write enabled.*/
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/*
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* PIOB setup.
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*/
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#if (SAM7_PLATFORM == SAM7X128) || (SAM7_PLATFORM == SAM7X256) || \
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(SAM7_PLATFORM == SAM7X512)
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AT91C_BASE_PIOB->PIO_PPUER = config->P1Data.pusr; /* Pull-up as spec.*/
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AT91C_BASE_PIOB->PIO_PPUDR = ~config->P1Data.pusr;
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AT91C_BASE_PIOB->PIO_PER = 0xFFFFFFFF; /* PIO enabled.*/
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AT91C_BASE_PIOB->PIO_ODSR = config->P1Data.odsr; /* Data as specified.*/
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AT91C_BASE_PIOB->PIO_OER = config->P1Data.osr; /* Dir. as specified.*/
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AT91C_BASE_PIOB->PIO_ODR = ~config->P1Data.osr;
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AT91C_BASE_PIOB->PIO_IFDR = 0xFFFFFFFF; /* Filter disabled.*/
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AT91C_BASE_PIOB->PIO_IDR = 0xFFFFFFFF; /* Int. disabled.*/
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AT91C_BASE_PIOB->PIO_MDDR = 0xFFFFFFFF; /* Push Pull drive.*/
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AT91C_BASE_PIOB->PIO_ASR = 0xFFFFFFFF; /* Peripheral A.*/
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AT91C_BASE_PIOB->PIO_OWER = 0xFFFFFFFF; /* Write enabled.*/
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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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* @note This function is not meant to be invoked directly from the
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* application code.
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* @note @p PAL_MODE_RESET is implemented as input with pull-up.
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* @note @p PAL_MODE_UNCONNECTED is implemented as push pull output with
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* high state.
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* @note @p PAL_MODE_OUTPUT_OPENDRAIN also enables the pull-up resistor.
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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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* @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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uint_fast8_t mode) {
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switch (mode & PAL_MODE_MASK) {
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case PAL_MODE_RESET:
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case PAL_MODE_INPUT_PULLUP:
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port->PIO_PPUER = mask;
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port->PIO_ODR = mask;
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break;
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case PAL_MODE_INPUT:
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case PAL_MODE_INPUT_ANALOG:
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port->PIO_PPUDR = mask;
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port->PIO_ODR = mask;
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break;
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case PAL_MODE_UNCONNECTED:
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port->PIO_SODR = mask;
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/* Falls in */
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case PAL_MODE_OUTPUT_PUSHPULL:
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port->PIO_PPUDR = mask;
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port->PIO_OER = mask;
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port->PIO_MDDR = mask;
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break;
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case PAL_MODE_OUTPUT_OPENDRAIN:
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port->PIO_PPUER = mask;
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port->PIO_OER = mask;
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port->PIO_MDER = mask;
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}
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}
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#endif /* HAL_USE_PAL */
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/** @} */
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