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LibrePilot/flight/PiOS/inc/pios_spi.h

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/**
******************************************************************************
* @addtogroup PIOS PIOS Core hardware abstraction layer
* @{
* @addtogroup PIOS_SPI SPI Functions
* @{
*
* @file pios_spi.h
* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
* Parts by Thorsten Klose (tk@midibox.org)
* @brief SPI functions header.
* @see The GNU Public License (GPL) Version 3
*
*****************************************************************************/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef PIOS_SPI_H
#define PIOS_SPI_H
/* Global types */
typedef enum {
PIOS_SPI_PRESCALER_2 = 0,
PIOS_SPI_PRESCALER_4 = 1,
PIOS_SPI_PRESCALER_8 = 2,
PIOS_SPI_PRESCALER_16 = 3,
PIOS_SPI_PRESCALER_32 = 4,
PIOS_SPI_PRESCALER_64 = 5,
PIOS_SPI_PRESCALER_128 = 6,
PIOS_SPI_PRESCALER_256 = 7
} SPIPrescalerTypeDef;
/* Public Functions */
extern int32_t PIOS_SPI_Init(void);
extern int32_t PIOS_SPI_SetClockSpeed(uint8_t spi, SPIPrescalerTypeDef spi_prescaler);
extern int32_t PIOS_SPI_RC_PinSet(uint8_t spi, uint8_t pin_value);
extern int32_t PIOS_SPI_TransferByte(uint8_t spi, uint8_t b);
extern int32_t PIOS_SPI_TransferBlock(uint8_t spi, const uint8_t * send_buffer, uint8_t * receive_buffer, uint16_t len, void *callback);
extern int32_t PIOS_SPI_Busy(uint8_t spi);
extern void PIOS_SPI_IRQ_Handler(uint8_t spi);
extern int8_t PIOS_SPI_ClaimBus(uint8_t spi);
extern int8_t PIOS_SPI_ReleaseBus(uint8_t spi);
#endif /* PIOS_SPI_H */
/**
* @}
* @}
*/