115 lines
3.7 KiB
C
115 lines
3.7 KiB
C
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/*
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* Contiki PIC32 Port project
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*
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* Copyright (c) 2012,
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* Scuola Superiore Sant'Anna (http://www.sssup.it) and
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* Consorzio Nazionale Interuniversitario per le Telecomunicazioni
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* (http://www.cnit.it).
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/**
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* \addtogroup pic32 PIC32 Contiki Port
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*
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* @{
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*/
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/**
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* \file pic32_spi.h
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* \brief SPI interface for PIC32MX (pic32mx795f512l)
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* \author Giovanni Pellerano <giovanni.pellerano@evilaliv3.org>
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* \date 2012-03-21
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*/
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/*
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* PIC32MX795F512L - Specific Functions
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*
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* All the functions in this part of the file are specific for the
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* pic32mx795f512l that is characterized by registers' name that differ from
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* the 3xx and 4xx families of the pic32mx.
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*/
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#ifndef __INCLUDE_PIC32_SPI_H__
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#define __INCLUDE_PIC32_SPI_H__
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#ifdef __USE_SPI__
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#include <p32xxxx.h>
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#include <stdint.h>
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/* Returned Messages */
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#define SPI_NO_ERRORS 0
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#define SPI_ERR_BAD_PORT 1
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#define SPI_ERR_BAD_ARGS 2
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#define SPI_ERR_BUSY 3
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#define SPI_ERR_UNIMPLEMENTED 10
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/*
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* Configuration Flags
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* NOTE: this work under the assumption that all the SPI ports have the same
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* control register specification. See pic32mx family reference manual.
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*/
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#define SPI_MASTER 0b00000000000000000000000000100000
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#define SPI_CLOCK_IDLE_HIGH 0b00000000000000000000000001000000
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#define SPI_SDO_ON_CLOCK_TO_IDLE 0b00000000000000000000000100000000
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#define SPI_SDI_ON_CLOCK_END 0b00000000000000000000001000000000
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/* Other Flags */
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#define SPI_DEFAULT (SPI_MASTER | SPI_SDO_ON_CLOCK_TO_IDLE)
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#define SPI_DEF(XX) \
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int8_t pic32_spi##XX##_init(uint32_t baudrate, uint32_t flags); \
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int8_t pic32_spi##XX##_close(); \
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int8_t pic32_spi##XX##_write(const uint8_t *data, uint32_t len);\
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int8_t pic32_spi##XX##_read(uint8_t *data, uint32_t len);
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#ifdef __USE_SPI_PORT1__
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SPI_DEF(1)
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#endif /* __USE_SPI_PORT1__ */
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#ifdef __USE_SPI_PORT1A__
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SPI_DEF(1A)
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#endif /* __USE_SPI_PORT1A__ */
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#ifdef __USE_SPI_PORT2A__
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SPI_DEF(2A)
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#endif /* __USE_SPI_PORT2A__ */
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#ifdef __USE_SPI_PORT3A__
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SPI_DEF(3A)
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#endif /* __USE_SPI_PORT3A__ */
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#endif /* __USE_SPI__ */
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#endif /* __INCLUDE_PIC32_SPI_H__ */
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/** @} */
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