452 lines
15 KiB
C
452 lines
15 KiB
C
/*
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ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file hal_pal_lld.h
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* @brief PLATFORM PAL subsystem 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 HAL_PAL_LLD_H
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#define HAL_PAL_LLD_H
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#if (HAL_USE_PAL == TRUE) || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Unsupported modes and specific modes */
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/*===========================================================================*/
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/* Specifies palInit() without parameter, required until all platforms will
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be updated to the new style.*/
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#define PAL_NEW_INIT
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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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* @name Port related definitions
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* @{
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*/
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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 16U
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/**
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* @brief Whole port mask.
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* @details This macro specifies all the valid bits into a port.
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*/
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#define PAL_WHOLE_PORT ((ioportmask_t)0xFFFFU)
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/** @} */
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/**
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* @name Line handling macros
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* @{
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*/
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/**
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* @brief Forms a line identifier.
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* @details A port/pad pair are encoded into an @p ioline_t type. The encoding
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* of this type is platform-dependent.
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*/
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#define PAL_LINE(port, pad) \
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((ioline_t)((uint32_t)(port)) | ((uint32_t)(pad)))
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/**
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* @brief Decodes a port identifier from a line identifier.
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*/
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#define PAL_PORT(line) \
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((stm32_gpio_t *)(((uint32_t)(line)) & 0xFFFFFFF0U))
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/**
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* @brief Decodes a pad identifier from a line identifier.
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*/
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#define PAL_PAD(line) \
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((uint32_t)((uint32_t)(line) & 0x0000000FU))
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/**
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* @brief Value identifying an invalid line.
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*/
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#define PAL_NOLINE 0U
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/** @} */
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/**
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* @brief Generic I/O ports 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 Implementations may extend this structure to contain more,
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* architecture dependent, fields.
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*/
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typedef struct {
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} PALConfig;
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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 Type of an I/O line.
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*/
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typedef uint32_t ioline_t;
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/**
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* @brief Port Identifier.
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* @details This type can be a scalar or some kind of pointer, do not make
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* any assumption about it, use the provided macros when populating
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* variables of this type.
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*/
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typedef uint32_t ioportid_t;
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/**
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* @brief Type of an pad identifier.
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*/
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typedef uint32_t iopadid_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 First I/O port identifier.
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* @details Low level drivers can define multiple ports, it is suggested to
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* use this naming convention.
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*/
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#define IOPORT1 0
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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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* @notapi
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*/
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#define pal_lld_init() _pal_lld_init()
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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) 0U
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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) 0U
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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) \
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do { \
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(void)port; \
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(void)bits; \
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} while (false)
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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) \
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do { \
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(void)port; \
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(void)bits; \
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} while (false)
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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) \
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do { \
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(void)port; \
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(void)bits; \
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} while (false)
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/**
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* @brief Toggles 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 XORed on the specified port
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*
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* @notapi
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*/
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#define pal_lld_toggleport(port, bits) \
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do { \
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(void)port; \
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(void)bits; \
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} while (false)
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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) 0U
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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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do { \
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(void)port; \
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(void)mask; \
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(void)offset; \
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(void)bits; \
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} while (false)
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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 Reads a logical state from an I/O pad.
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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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* @return The logical state.
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* @retval PAL_LOW low logical state.
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* @retval PAL_HIGH high logical state.
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*
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* @notapi
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*/
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#define pal_lld_readpad(port, pad) PAL_LOW
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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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do { \
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(void)port; \
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(void)pad; \
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(void)bit; \
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} while (false)
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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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do { \
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(void)port; \
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(void)pad; \
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} while (false)
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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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do { \
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(void)port; \
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(void)pad; \
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} while (false)
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/**
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* @brief Toggles a pad logical state.
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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_togglepad(port, pad) \
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do { \
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(void)port; \
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(void)pad; \
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} while (false)
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/**
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* @brief Pad mode setup.
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* @details This function programs a pad with the specified mode.
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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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* @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] pad pad number within the port
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* @param[in] mode pad mode
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*
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* @notapi
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*/
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#define pal_lld_setpadmode(port, pad, mode) \
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do { \
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(void)port; \
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(void)pad; \
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(void)mode; \
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} while (false)
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/**
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* @brief Returns a PAL event structure associated to a pad.
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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_get_pad_event(port, pad) \
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&_pal_events[0]; (void)(port); (void)pad
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/**
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* @brief Returns a PAL event structure associated to a line.
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*
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* @param[in] line line identifier
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*
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* @notapi
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*/
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#define pal_lld_get_line_event(line) \
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&_pal_events[0]; (void)line
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#if !defined(__DOXYGEN__)
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#if (PAL_USE_WAIT == TRUE) || (PAL_USE_CALLBACKS == TRUE)
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extern palevent_t _pal_events[1];
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#endif
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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(void);
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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 == TRUE */
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#endif /* HAL_PAL_LLD_H */
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/** @} */
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