86 lines
3.4 KiB
C
86 lines
3.4 KiB
C
/**************************************************************************/
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/*!
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@file ssp.h
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@author K. Townsend (microBuilder.eu)
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@date 22 March 2010
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@version 0.10
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@section LICENSE
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Software License Agreement (BSD License)
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Copyright (c) 2010, microBuilder SARL
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All rights reserved.
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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 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 copyright holders nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**************************************************************************/
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#ifndef _SSP_H_
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#define _SSP_H_
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#include "projectconfig.h"
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#include "core/gpio/gpio.h"
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#define SSP_FIFOSIZE 8 /* SPI read and write buffer size */
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#define SSP_MAX_TIMEOUT 0xFF
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#define SSP0_CSPORT 0
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#define SSP0_CSPIN 2
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/* Macro definitions to enable and disable SPI */
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#define ssp0Select() do {gpioSetValue(SSP0_CSPORT, SSP0_CSPIN, 0);} while (0)
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#define ssp0Deselect() do {gpioSetValue(SSP0_CSPORT, SSP0_CSPIN, 1);} while (0)
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/**************************************************************************/
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/*!
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Indicates whether the clock should be high or low between frames.
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*/
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/**************************************************************************/
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typedef enum sspClockPolarity_e
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{
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sspClockPolarity_Low = 0,
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sspClockPolarity_High
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}
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sspClockPolarity_t;
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/**************************************************************************/
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/*!
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Indicates whether the bits start at the rising or falling edge of
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the clock transition.
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*/
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/**************************************************************************/
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typedef enum sspClockPhase_e
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{
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sspClockPhase_RisingEdge = 0,
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sspClockPhase_FallingEdge
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}
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sspClockPhase_t;
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extern void SSP_IRQHandler (void);
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void sspInit (uint8_t portNum, sspClockPolarity_t polarity, sspClockPhase_t phase);
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void sspSend (uint8_t portNum, uint8_t *buf, uint32_t length);
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void sspReceive (uint8_t portNum, uint8_t *buf, uint32_t length);
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#endif
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