/* ---------------------------------------------------------------------------- | |
* ATMEL Microcontroller Software Support | |
* ---------------------------------------------------------------------------- | |
* Copyright (c) 2009, Atmel Corporation | |
* | |
* All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions are 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 | |
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* 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 & TWI_SR_TXRDY) == TWI_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 & TWI_SR_RXRDY) == TWI_SR_RXRDY) | |
/* Returns 1 if the TXCOMP bit (transfer complete) is set in the given status register value.*/ | |
#define TWI_STATUS_TXCOMP(status) ((status & TWI_SR_TXCOMP) == TWI_SR_TXCOMP) | |
#ifdef __cplusplus | |
extern "C" { | |
#endif | |
/*---------------------------------------------------------------------------- | |
* External function | |
*----------------------------------------------------------------------------*/ | |
extern void TWI_ConfigureMaster(Twi *pTwi, uint32_t twck, uint32_t mck); | |
extern void TWI_ConfigureSlave(Twi *pTwi, uint8_t slaveAddress); | |
extern void TWI_Stop(Twi *pTwi); | |
extern void TWI_StartRead( | |
Twi *pTwi, | |
uint8_t address, | |
uint32_t iaddress, | |
uint8_t isize); | |
extern uint8_t TWI_ReadByte(Twi *pTwi); | |
extern void TWI_WriteByte(Twi *pTwi, uint8_t byte); | |
extern void TWI_StartWrite( | |
Twi *pTwi, | |
uint8_t address, | |
uint32_t iaddress, | |
uint8_t isize, | |
uint8_t byte); | |
extern uint8_t TWI_ByteReceived(Twi *pTwi); | |
extern uint8_t TWI_ByteSent(Twi *pTwi); | |
extern uint8_t TWI_TransferComplete(Twi *pTwi); | |
extern void TWI_EnableIt(Twi *pTwi, uint32_t sources); | |
extern void TWI_DisableIt(Twi *pTwi, uint32_t sources); | |
extern uint32_t TWI_GetStatus(Twi *pTwi); | |
extern uint32_t TWI_GetMaskedStatus(Twi *pTwi); | |
extern void TWI_SendSTOPCondition(Twi *pTwi); | |
#ifdef __cplusplus | |
} | |
#endif | |
#endif /* #ifndef _TWI_ */ |