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-rw-r--r--os/hal/src/pal.c122
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diff --git a/os/hal/src/pal.c b/os/hal/src/pal.c
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-/*
- ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
-*/
-
-/**
- * @file pal.c
- * @brief I/O Ports Abstraction Layer code.
- *
- * @addtogroup PAL
- * @{
- */
-
-#include "hal.h"
-
-#if (HAL_USE_PAL == TRUE) || defined(__DOXYGEN__)
-
-/*===========================================================================*/
-/* Driver local definitions. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver exported variables. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver local variables and types. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver local functions. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief Read from an I/O bus.
- * @note The operation is not guaranteed to be atomic on all the
- * architectures, for atomicity and/or portability reasons you may
- * need to enclose port I/O operations between @p osalSysLock() and
- * @p osalSysUnlock().
- * @note The function internally uses the @p palReadGroup() macro. The use
- * of this function is preferred when you value code size, readability
- * and error checking over speed.
- * @note The function can be called from any context.
- *
- * @param[in] bus the I/O bus, pointer to a @p IOBus structure
- * @return The bus logical states.
- *
- * @special
- */
-ioportmask_t palReadBus(IOBus *bus) {
-
- osalDbgCheck((bus != NULL) && (bus->offset < PAL_IOPORTS_WIDTH));
-
- return palReadGroup(bus->portid, bus->mask, bus->offset);
-}
-
-/**
- * @brief Write to an I/O bus.
- * @note The operation is not guaranteed to be atomic on all the
- * architectures, for atomicity and/or portability reasons you may
- * need to enclose port I/O operations between @p osalSysLock() and
- * @p osalSysUnlock().
- * @note The default implementation is non atomic and not necessarily
- * optimal. Low level drivers may optimize the function by using
- * specific hardware or coding.
- * @note The function can be called from any context.
- *
- * @param[in] bus the I/O bus, pointer to a @p IOBus structure
- * @param[in] bits the bits to be written on the I/O bus. Values exceeding
- * the bus width are masked so most significant bits are
- * lost.
- *
- * @special
- */
-void palWriteBus(IOBus *bus, ioportmask_t bits) {
-
- osalDbgCheck((bus != NULL) && (bus->offset < PAL_IOPORTS_WIDTH));
-
- palWriteGroup(bus->portid, bus->mask, bus->offset, bits);
-}
-
-/**
- * @brief Programs a bus with the specified mode.
- * @note The operation is not guaranteed to be atomic on all the
- * architectures, for atomicity and/or portability reasons you may
- * need to enclose port I/O operations between @p osalSysLock() and
- * @p osalSysUnlock().
- * @note The default implementation is non atomic and not necessarily
- * optimal. Low level drivers may optimize the function by using
- * specific hardware or coding.
- * @note The function can be called from any context.
- *
- * @param[in] bus the I/O bus, pointer to a @p IOBus structure
- * @param[in] mode the mode
- *
- * @special
- */
-void palSetBusMode(IOBus *bus, iomode_t mode) {
-
- osalDbgCheck((bus != NULL) && (bus->offset < PAL_IOPORTS_WIDTH));
-
- palSetGroupMode(bus->portid, bus->mask, bus->offset, mode);
-}
-
-#endif /* HAL_USE_PAL == TRUE */
-
-/** @} */