117 lines
4.2 KiB
C
117 lines
4.2 KiB
C
/*
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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 ports/ARM7-AT91SAM7X/pal_lld.c
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* @brief AT91SAM7X PIO low level driver code
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* @addtogroup AT91SAM7X_PAL
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* @{
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*/
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#include <ch.h>
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#include <pal.h>
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/**
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* @brief AT91SAM7X I/O ports configuration.
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* @details PIO registers initialization.
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*
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* @param[in] config the AT91SAM7X ports configuration
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*/
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void _pal_lld_init(const AT91SAM7XPIOConfig *config) {
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AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_PIOA) | (1 << AT91C_ID_PIOB);
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/*
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* PIOA setup.
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*/
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AT91C_BASE_PIOA->PIO_OER = config->P0Data.pusr; /* Pull-up as spec.*/
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AT91C_BASE_PIOA->PIO_ODR = ~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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AT91C_BASE_PIOB->PIO_OER = config->P0Data.pusr; /* Pull-up as spec.*/
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AT91C_BASE_PIOB->PIO_ODR = ~config->P0Data.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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}
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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_RESET is implemented as input with pull-up.
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* @note @p PAL_MODE_UNCONNECTED is implemented as push pull output with high
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* 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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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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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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/** @} */
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