/*********************************************************************
 *
 *                  SPI API implementation file
 *
 *********************************************************************
 * FileName:        spi_chn_close_lib.c
 * Dependencies:    Spi.h
 *
 * Processor:       PIC32
 *
 * Complier:        MPLAB C32
 *                  MPLAB IDE
 * Company:         Microchip Technology Inc..
 *
 * Software License Agreement
 *
 * The software supplied herewith by Microchip Technology Incorporated
 * (the Company) for its PIC32 Microcontroller is intended
 * and supplied to you, the Companys customer, for use solely and
 * exclusively on Microchip PIC32 Microcontroller products.
 * The software is owned by the Company and/or its supplier, and is
 * protected under applicable copyright laws. All rights are reserved.
 * Any use in violation of the foregoing restrictions may subject the
 * user to criminal sanctions under applicable laws, as well as to
 * civil liability for the breach of the terms and conditions of this
 * license.
 *
 * THIS SOFTWARE IS PROVIDED IN AN AS IS CONDITION. NO WARRANTIES,
 * WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED
 * TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,
 * IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
 * CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
 *
 *
 * $Id$
 * $Name$
 *
 ********************************************************************/
#include <peripheral/spi.h>
#include <peripheral/ports.h>
#include <peripheral/int.h>

#include "_spi_io_tbl.h"
#include "_spi_map_tbl.h"


/********************
 * Channel functions.
 * Defined only if there's at least one valid SPI channel
 * *********************************/
#ifdef _SPI_DEF_CHN_

/*********************************************************************
 * Function:        void SpiChnClose(SpiChannel chn)
 *
 * PreCondition:    chn	- a valid SPI channel number
 *
 * Input:			chn		- the channel to close
 *
 * Output:          None
 *
 * Side Effects:    None
 *
 * Overview:        This function closes the SPI channel. Some previous error conditions are cleared.
 * 					Channel interrupts are disabled.
 *
 * Note:		- The I/O pins used by the SPI module are returned to their reset configuration.
 * 			- The SPI_OPEN_SSEN is used to decide if the SS pin has to be returned to the reset state.
 ********************************************************************/
void SpiChnClose(SpiChannel chn)
{
	__SPIxCONbits_t		conR;
	volatile _SpiRegMap*	pReg=_SpiMapTbl[chn];
	const _SpiIoDcpt* pDcpt=_SpiIoTbl+chn;

	conR.w=pReg->con.w;
	pReg->conClr=__SPIxCON_MASK_(ON_MASK);		// turn off and reset

	INTEnable(INT_SOURCE_SPI(chn), INT_DISABLED);		// disable the interrupts
	INTClearFlag(INT_SOURCE_SPI(chn));		// clear the existing flags



	PORTResetPins(pDcpt->portSdo, pDcpt->sdoMask);
	PORTResetPins(pDcpt->portSdi, pDcpt->sdiMask);
	PORTResetPins(pDcpt->portSck, pDcpt->sckMask);

	if(conR.FRMEN || conR.SSEN)
	{
		PORTResetPins(pDcpt->portSS, pDcpt->ssMask);
	}
}


#endif	// _SPI_DEF_CHN_


