77 lines
2.4 KiB
C
77 lines
2.4 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 spi.h
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* @brief SPI Driver macros and structures.
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* @addtogroup SPI
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* @{
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*/
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#ifndef _SPI_H_
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#define _SPI_H_
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/**
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* @brief Enables the mutual exclusion APIs on the SPI bus.
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*/
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#if !defined(SPI_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
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#define SPI_USE_MUTUAL_EXCLUSION TRUE
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#endif
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#if SPI_USE_MUTUAL_EXCLUSION && !CH_USE_MUTEXES && !CH_USE_SEMAPHORES
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#error "SPI_USE_MUTUAL_EXCLUSION requires CH_USE_MUTEXES and/or CH_USE_SEMAPHORES"
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#endif
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/**
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* @brief Driver state machine possible states.
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*/
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typedef enum {
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SPI_UNINIT = 0, /**< @brief Not initialized. */
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SPI_STOP = 1, /**< @brief Stopped. */
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SPI_READY = 2, /**< @brief Ready. */
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SPI_ACTIVE = 3 /**< @brief Slave selected. */
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} spistate_t;
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#include "spi_lld.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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void spiInit(void);
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void spiObjectInit(SPIDriver *spip);
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void spiStart(SPIDriver *spip, const SPIConfig *config);
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void spiStop(SPIDriver *spip);
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void spiSelect(SPIDriver *spip);
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void spiUnselect(SPIDriver *spip);
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msg_t spiIgnore(SPIDriver *spip, size_t n);
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msg_t spiExchange(SPIDriver *spip, size_t n, void *txbuf, void *rxbuf);
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msg_t spiSend(SPIDriver *spip, size_t n, void *txbuf);
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msg_t spiReceive(SPIDriver *spip, size_t n, void *rxbuf);
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#if SPI_USE_MUTUAL_EXCLUSION
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void spiAcquireBus(SPIDriver *spip);
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void spiReleaseBus(SPIDriver *spip);
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#endif /* SPI_USE_MUTUAL_EXCLUSION */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SPI_H_ */
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/** @} */
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