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/*
* Copyright 2012 Ettus Research LLC
* Copyright 2006,2007 Free Software Foundation, Inc.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef INCLUDED_SPI_H
#define INCLUDED_SPI_H
#include <stdbool.h>
#include <stdint.h>
/*!
* \brief One time call to initialize SPI
*/
void spi_init(void);
/*!
* \brief Wait for last SPI transaction to complete.
* Unless you need to know it completed, it's not necessary to call this.
*/
void spi_wait(void);
#define SPI_TXONLY false // readback: no
#define SPI_TXRX true // readback: yes
/*
* Flags for spi_transact
*/
#define SPI_PUSH_RISE (1 << 0) // push tx data on rising edge of SCLK
#define SPI_PUSH_FALL (1 << 1) // push tx data on falling edge of SCLK
#define SPI_LATCH_RISE (1 << 2) // latch rx data on rising edge of SCLK
#define SPI_LATCH_FALL (1 << 3) // latch rx data on falling edge of SCLK
uint32_t spi_transact(bool readback, int slave, uint32_t data, int length, uint32_t flags);
#endif /* INCLUDED_SPI_H */
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