90 lines
2.6 KiB
C
90 lines
2.6 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 LPC214x/pal_lld.c
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* @brief LPC214x FIO low level driver code
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* @addtogroup LPC214x_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 LPC214x I/O ports configuration.
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* @details FIO units and PINSEL registers initialization.
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*
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* @param[in] config the LPC214x ports configuration
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*/
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void _pal_lld_init(const LPC214xFIOConfig *config) {
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/* Enables the access through the fast registers.*/
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SCS = 3;
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/* I/O pads initial assignment, device drivers may change this setup at a
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* later time.*/
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PINSEL0 = config->pinsel0;
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PINSEL1 = config->pinsel1;
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PINSEL2 = config->pinsel2;
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/* I/O pads direction initial setting.*/
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FIO0Base->FIO_MASK = 0;
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FIO0Base->FIO_PIN = config->P0Data.pin;
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FIO0Base->FIO_DIR = config->P0Data.dir;
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FIO1Base->FIO_MASK = 0;
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FIO1Base->FIO_PIN = config->P1Data.pin;
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FIO1Base->FIO_DIR = config->P1Data.dir;
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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 push pull output with high
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* state.
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* @note This function does not alter the @p PINSELx registers. Alternate
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* functions setup must be handled by device-specific code.
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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) {
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case PAL_MODE_RESET:
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case PAL_MODE_INPUT:
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port->FIO_DIR &= ~mask;
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break;
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case PAL_MODE_UNCONNECTED:
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port->FIO_PIN |= mask;
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case PAL_MODE_OUTPUT_PUSHPULL:
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port->FIO_DIR |= mask;
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break;
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}
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}
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/** @} */
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