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ff0bd87f4e
and uses an ISR safe queue claiming method. This avoids deadlocks when ISR blocks other tasks from freeing the bus.
68 lines
2.5 KiB
C
68 lines
2.5 KiB
C
/**
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******************************************************************************
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* @addtogroup PIOS PIOS Core hardware abstraction layer
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* @{
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* @addtogroup PIOS_SPI SPI Functions
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* @{
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*
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* @file pios_spi.h
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* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
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* Parts by Thorsten Klose (tk@midibox.org)
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* @brief SPI functions header.
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* @see The GNU Public License (GPL) Version 3
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*
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*****************************************************************************/
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/*
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* This program 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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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef PIOS_SPI_H
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#define PIOS_SPI_H
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/* Global types */
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typedef enum {
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PIOS_SPI_PRESCALER_2 = 0,
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PIOS_SPI_PRESCALER_4 = 1,
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PIOS_SPI_PRESCALER_8 = 2,
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PIOS_SPI_PRESCALER_16 = 3,
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PIOS_SPI_PRESCALER_32 = 4,
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PIOS_SPI_PRESCALER_64 = 5,
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PIOS_SPI_PRESCALER_128 = 6,
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PIOS_SPI_PRESCALER_256 = 7
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} SPIPrescalerTypeDef;
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/* Public Functions */
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extern int32_t PIOS_SPI_SetClockSpeed(uint32_t spi_id, SPIPrescalerTypeDef spi_prescaler);
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#if defined(STM32F2XX) || defined(STM32F4XX) /* XXX harmonise these */
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extern int32_t PIOS_SPI_RC_PinSet(uint32_t spi_id, uint32_t slave_id, uint8_t pin_value);
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#else
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extern int32_t PIOS_SPI_RC_PinSet(uint32_t spi_id, uint8_t pin_value);
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#endif
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extern int32_t PIOS_SPI_TransferByte(uint32_t spi_id, uint8_t b);
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extern int32_t PIOS_SPI_TransferBlock(uint32_t spi_id, const uint8_t *send_buffer, uint8_t *receive_buffer, uint16_t len, void *callback);
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extern int32_t PIOS_SPI_Busy(uint32_t spi_id);
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extern int32_t PIOS_SPI_ClaimBus(uint32_t spi_id);
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extern int32_t PIOS_SPI_ClaimBusISR(uint32_t spi_id);
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extern int32_t PIOS_SPI_ReleaseBus(uint32_t spi_id);
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extern void PIOS_SPI_IRQ_Handler(uint32_t spi_id);
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extern void PIOS_SPI_SetPrescalar(uint32_t spi_id, uint32_t prescalar);
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#endif /* PIOS_SPI_H */
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/**
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* @}
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* @}
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*/
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