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/* ---------------------------------------------------------------------------- */
/* Atmel Microcontroller Software Support */
/* SAM Software Package License */
/* ---------------------------------------------------------------------------- */
/* Copyright (c) 2015, Atmel Corporation */
/* */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following condition is met: */
/* */
/* - Redistributions of source code must retain the above copyright notice, */
/* this list of conditions and the disclaimer below. */
/* */
/* Atmel's name may not be used to endorse or promote products derived from */
/* this software without specific prior written permission. */
/* */
/* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR */
/* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE */
/* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, */
/* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */
/* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, */
/* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF */
/* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING */
/* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, */
/* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
/* ---------------------------------------------------------------------------- */
/**
* \file
*
* Interface for configuration the Two Wire Interface (TWI) peripheral.
*
*/
#ifndef _TWI_
#define _TWI_
/*------------------------------------------------------------------------------
* Headers
*----------------------------------------------------------------------------*/
#include "chip.h"
#include <stdint.h>
/*----------------------------------------------------------------------------
* Macros
*----------------------------------------------------------------------------*/
/* Returns 1 if the TXRDY bit (ready to transmit data) is set in the given
status register value.*/
#define TWI_STATUS_TXRDY(status) ((status & TWIHS_SR_TXRDY) == TWIHS_SR_TXRDY)
/* Returns 1 if the RXRDY bit (ready to receive data) is set in the given
status register value.*/
#define TWI_STATUS_RXRDY(status) ((status & TWIHS_SR_RXRDY) == TWIHS_SR_RXRDY)
/* Returns 1 if the TXCOMP bit (transfer complete) is set in the given
status register value.*/
#define TWI_STATUS_TXCOMP(status) ((status & TWIHS_SR_TXCOMP) == TWIHS_SR_TXCOMP)
#ifdef __cplusplus
extern "C" {
#endif
/*----------------------------------------------------------------------------
* External function
*----------------------------------------------------------------------------*/
extern void TWI_ConfigureMaster(Twihs *pTwi, uint32_t twck, uint32_t mck);
extern void TWI_ConfigureSlave(Twihs *pTwi, uint8_t slaveAddress);
extern void TWI_Stop(Twihs *pTwi);
extern void TWI_StartRead(
Twihs *pTwi,
uint8_t address,
uint32_t iaddress,
uint8_t isize);
extern uint8_t TWI_ReadByte(Twihs *pTwi);
extern void TWI_WriteByte(Twihs *pTwi, uint8_t byte);
extern void TWI_StartWrite(
Twihs *pTwi,
uint8_t address,
uint32_t iaddress,
uint8_t isize,
uint8_t byte);
extern uint8_t TWI_ByteReceived(Twihs *pTwi);
extern uint8_t TWI_ByteSent(Twihs *pTwi);
extern uint8_t TWI_TransferComplete(Twihs *pTwi);
extern void TWI_EnableIt(Twihs *pTwi, uint32_t sources);
extern void TWI_DisableIt(Twihs *pTwi, uint32_t sources);
extern uint32_t TWI_GetStatus(Twihs *pTwi);
extern uint32_t TWI_GetMaskedStatus(Twihs *pTwi);
extern void TWI_SendSTOPCondition(Twihs *pTwi);
#ifdef __cplusplus
}
#endif
#endif /* #ifndef _TWI_ */
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