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Diffstat (limited to 'bsps/arm/atsam/include/libchip/include/twi.h')
| -rw-r--r-- | bsps/arm/atsam/include/libchip/include/twi.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/bsps/arm/atsam/include/libchip/include/twi.h b/bsps/arm/atsam/include/libchip/include/twi.h new file mode 100644 index 0000000000..6a5de366f2 --- /dev/null +++ b/bsps/arm/atsam/include/libchip/include/twi.h @@ -0,0 +1,114 @@ +/* ---------------------------------------------------------------------------- */ +/* 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_ */ |