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78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
/* -*- c -*- */
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/*
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* Copyright 2006,2007 Free Software Foundation, Inc.
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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,
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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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*
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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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#ifndef INCLUDED_SPI_H
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#define INCLUDED_SPI_H
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#include <memory_map.h>
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#include <stdbool.h>
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/*!
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* \brief One time call to initialize SPI
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*/
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void spi_init(void);
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/*!
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* \brief Wait for last SPI transaction to complete.
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* Unless you need to know it completed, it's not necessary to call this.
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*/
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void spi_wait(void);
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#define SPI_TXONLY false // readback: no
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#define SPI_TXRX true // readback: yes
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/*
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* Flags for spi_transact
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*/
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#define SPIF_PUSH_RISE 0 // push tx data on rising edge of SCLK
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#define SPIF_PUSH_FALL SPI_CTRL_TXNEG // push tx data on falling edge of SCLK
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#define SPIF_LATCH_RISE 0 // latch rx data on rising edge of SCLK
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#define SPIF_LATCH_FALL SPI_CTRL_RXNEG // latch rx data on falling edge of SCLK
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uint32_t
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spi_transact(bool readback, int slave, uint32_t data, int length, uint32_t flags);
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//uint32_t spi_get_data(void);
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//static void spi_irq_handler(unsigned irq);
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//void spi_register_callback(void (*volatile callback)(void));
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//bool
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//spi_async_transact(int slave, uint32_t data, int length, uint32_t flags, void (*volatile callback)(void));
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// ----------------------------------------------------------------
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// Routines that manipulate the FLASH SPI BUS
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// ----------------------------------------------------------------
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/*!
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* \brief One time call to initialize SPI
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*/
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void spif_init(void);
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/*!
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* \brief Wait for last SPI transaction to complete.
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* Unless you need to know it completed, it's not necessary to call this.
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*/
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void spif_wait(void);
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uint32_t
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spif_transact(bool readback_, int slave, uint32_t data, int length, uint32_t flags);
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#endif /* INCLUDED_SPI_H */
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