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Arduino/hardware/sam/system/libsam/include/twi.h

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2011-09-06 21:05:41 +02:00
/*
%atmel_license%
*/
/**
* \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.*/
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#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.*/
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#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.*/
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#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_ */