321 lines
10 KiB
C
321 lines
10 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011,2012,2013 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 LPC13xx/pal_lld.h
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* @brief LPC13xx GPIO low level driver header.
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*
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* @addtogroup PAL
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* @{
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*/
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#ifndef _PAL_LLD_H_
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#define _PAL_LLD_H_
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#if HAL_USE_PAL || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Unsupported modes and specific modes */
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/*===========================================================================*/
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#undef PAL_MODE_INPUT_PULLUP
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#undef PAL_MODE_INPUT_PULLDOWN
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#undef PAL_MODE_INPUT_ANALOG
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#undef PAL_MODE_OUTPUT_OPENDRAIN
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/*===========================================================================*/
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/* I/O Ports Types and constants. */
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/*===========================================================================*/
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/**
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* @brief GPIO port setup info.
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*/
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typedef struct {
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/** Initial value for FIO_PIN register.*/
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uint32_t data;
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/** Initial value for FIO_DIR register.*/
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uint32_t dir;
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} lpc13xx_gpio_setup_t;
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/**
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* @brief GPIO static initializer.
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* @details An instance of this structure must be passed to @p palInit() at
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* system startup time in order to initialized the digital I/O
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* subsystem. This represents only the initial setup, specific pads
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* or whole ports can be reprogrammed at later time.
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* @note The @p IOCON block is not configured, initially all pins have
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* enabled pullups and are programmed as GPIO. It is responsibility
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* of the various drivers to reprogram the pins in the proper mode.
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* Pins that are not handled by any driver may be programmed in
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* @p board.c.
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*/
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typedef struct {
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/** @brief GPIO 0 setup data.*/
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lpc13xx_gpio_setup_t P0;
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/** @brief GPIO 1 setup data.*/
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lpc13xx_gpio_setup_t P1;
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/** @brief GPIO 2 setup data.*/
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lpc13xx_gpio_setup_t P2;
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/** @brief GPIO 3 setup data.*/
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lpc13xx_gpio_setup_t P3;
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} PALConfig;
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/**
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* @brief Width, in bits, of an I/O port.
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*/
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#define PAL_IOPORTS_WIDTH 32
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/**
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* @brief Whole port mask.
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* @brief This macro specifies all the valid bits into a port.
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*/
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#define PAL_WHOLE_PORT ((ioportmask_t)0xFFF)
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/**
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* @brief Digital I/O port sized unsigned type.
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*/
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typedef uint32_t ioportmask_t;
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/**
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* @brief Digital I/O modes.
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*/
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typedef uint32_t iomode_t;
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/**
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* @brief Port Identifier.
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*/
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typedef LPC_GPIO_TypeDef *ioportid_t;
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/*===========================================================================*/
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/* I/O Ports Identifiers. */
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/*===========================================================================*/
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/**
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* @brief GPIO0 port identifier.
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*/
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#define IOPORT1 LPC_GPIO0
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#define GPIO0 LPC_GPIO0
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/**
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* @brief GPIO1 port identifier.
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*/
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#define IOPORT2 LPC_GPIO1
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#define GPIO1 LPC_GPIO1
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/**
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* @brief GPIO2 port identifier.
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*/
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#define IOPORT3 LPC_GPIO2
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#define GPIO2 LPC_GPIO2
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/**
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* @brief GPIO3 port identifier.
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*/
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#define IOPORT4 LPC_GPIO3
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#define GPIO3 LPC_GPIO3
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/*===========================================================================*/
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/* Implementation, some of the following macros could be implemented as */
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/* functions, if so please put them in pal_lld.c. */
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/*===========================================================================*/
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/**
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* @brief Low level PAL subsystem initialization.
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*
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* @param[in] config architecture-dependent ports configuration
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*
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* @notapi
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*/
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#define pal_lld_init(config) _pal_lld_init(config)
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/**
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* @brief Reads the physical I/O port states.
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*
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* @param[in] port port identifier
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* @return The port bits.
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*
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* @notapi
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*/
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#define pal_lld_readport(port) ((port)->DATA)
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/**
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* @brief Reads the output latch.
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* @details The purpose of this function is to read back the latched output
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* value.
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*
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* @param[in] port port identifier
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* @return The latched logical states.
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*
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* @notapi
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*/
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#define pal_lld_readlatch(port) ((port)->DATA)
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/**
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* @brief Writes a bits mask on a I/O port.
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*
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* @param[in] port port identifier
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* @param[in] bits bits to be written on the specified port
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*
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* @notapi
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*/
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#define pal_lld_writeport(port, bits) ((port)->DATA = (bits))
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/**
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* @brief Sets a bits mask on a I/O port.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] bits bits to be ORed on the specified port
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*
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* @notapi
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*/
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#define pal_lld_setport(port, bits) ((port)->MASKED_ACCESS[bits] = 0xFFFFFFFF)
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/**
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* @brief Clears a bits mask on a I/O port.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] bits bits to be cleared on the specified port
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*
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* @notapi
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*/
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#define pal_lld_clearport(port, bits) ((port)->MASKED_ACCESS[bits] = 0)
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/**
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* @brief Reads a group of bits.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] mask group mask
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* @param[in] offset group bit offset within the port
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* @return The group logical states.
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*
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* @notapi
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*/
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#define pal_lld_readgroup(port, mask, offset) \
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((port)->MASKED_ACCESS[(mask) << (offset)])
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/**
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* @brief Writes a group of bits.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] mask group mask
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* @param[in] offset group bit offset within the port
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* @param[in] bits bits to be written. Values exceeding the group width
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* are masked.
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*
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* @notapi
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*/
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#define pal_lld_writegroup(port, mask, offset, bits) \
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((port)->MASKED_ACCESS[(mask) << (offset)] = (bits))
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/**
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* @brief Pads group 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 Programming an unknown or unsupported mode is silently ignored.
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*
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* @param[in] port port identifier
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* @param[in] mask group mask
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* @param[in] offset group bit offset within the port
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* @param[in] mode group mode
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*
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* @notapi
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*/
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#define pal_lld_setgroupmode(port, mask, offset, mode) \
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_pal_lld_setgroupmode(port, mask << offset, mode)
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/**
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* @brief Writes a logical state on an output pad.
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* @note This function is not meant to be invoked directly by the
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* application code.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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* @param[in] bit logical value, the value must be @p PAL_LOW or
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* @p PAL_HIGH
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*
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* @notapi
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*/
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#define pal_lld_writepad(port, pad, bit) \
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((port)->MASKED_ACCESS[1 << (pad)] = (bit) << (pad))
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/**
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* @brief Sets a pad logical state to @p PAL_HIGH.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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*
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* @notapi
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*/
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#define pal_lld_setpad(port, pad) \
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((port)->MASKED_ACCESS[1 << (pad)] = 1 << (pad))
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/**
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* @brief Clears a pad logical state to @p PAL_LOW.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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*
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* @notapi
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*/
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#define pal_lld_clearpad(port, pad) \
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((port)->MASKED_ACCESS[1 << (pad)] = 0)
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#if !defined(__DOXYGEN__)
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extern const PALConfig pal_default_config;
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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void _pal_lld_init(const PALConfig *config);
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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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#ifdef __cplusplus
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}
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#endif
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#endif /* HAL_USE_PAL */
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#endif /* _PAL_LLD_H_ */
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/** @} */
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